6600 CD

MINI6600

™

SERVICE MANUAL

ERROR CODES

PROCEDURES

SCHEMATICS

ILLUSTRATED PARTS PERIODIC MAINTENANCE INSTALLATION DEMONSTRATION INSTALLATION

© December 1997

MINI6600TM Imaging System Service Manual - Title Pages

MINI6600™ System Service Manual & Illustrated Parts Manual 00-878315-02

MINI6600 MINI 6600TM Imaging System Service Manual - Title Pages

©1997

OEC Medical Systems, Inc. 384 Wright Brothers Drive Salt Lake City, UT. 84116-4007

The MINI6600 MINI6600 is manufactured unde underr the following U.S. Patents: Patents: 4,768,216; 4,797,907; and 4,209,706. Other Patents Pending.

This manual contains descriptions, instructions and procedures that apply to the MINI6600 MINI 6600 Mobile Digital Imaging System only. only.

Software diskettes provided with this system contain Microsoft MS-DOS V 5.0 ©MICROSOFT CORPORATION 1995 All rights reserved Caution! Federal Law restricts this device to sale by, or on order of, a physician.

MINI6600 MINI 6600TM Imaging System Service Manual - Title Pages

Revision History Rev

Dash Date

Description

Rev 1

-01

March 1996

Preliminary release

Rev A

-01

Sept. 1996

Manufacturing Release

Rev Re v. B -02

Oct. Oct. 1997

Include Includes s Phase Phase 2 and 3 changes and parts

Rev Re v. C -03

Dec. Dec. 1997

Release Released d to CD-RO CD-ROM M

MINI6600TM Imaging System Service Manual - Introduction

Introduction OVERVIEW This section discusses the following topics: • • • •

How to use this manual Safety Precautions Unauthorized Modifications Certified Components

How To Use This Manual This manual contains information for the purpose of assisting trained service personnel to isolate failures and initiate repairs on the Mini6600 System. Reading this manual without proper training does not qualify the reader to service the Mini6600. The information contained within this manual per tains to systems currently being manufactured. Sections The Service Manual is divided into functional sections. Each covers correct functional operation and technical reference information to assist with diagnosis of component failures. Appendix The provided appendices contain PCB layout drawings, recommended tools and test equipment, specifications, and tolerances. Index The entire manual on CD is electronically indexed. Use the search engine in Reader (binocular icon on toolbar) to locate any word desired.


Warnings, Cautions & Notes The following warning, caution and note conventions are used throughout the manual to indicate where death, serious injury, or equipment damage may be incurred. It is essential to strictly follow the procedures provided in warning messages and caution messages.

WARNING: Warnings indicate the threat of death or serious personal injury

.

CAUTION: Cautions indicate the threat of minor personal injury or equipment damage. NOTE: Notes indicate useful information that should be taken into consideration.

SAFETY PRECAUTIONS Trained Service Personnel Personal injury or property damage can result from incorrectly performed service procedures. Observe all operating and safety procedures contained within this manual.

WARNING: Service personnel, specifically trained by OEC Medical Systems, Inc., should perform all procedures and service the Mini6600 System CAUTION: Federal law restricts this device to sale by, or on the order of, a physician


Ingress of Water and Solutions Always unplug the AC power cable from the wall outlet before cleaning the equipment. Do not allow water, soap, or other liquids to drip into the equipment and possibly cause short circuits, electric shock and fire hazards. Never operate the system or store in locations where conductive fluids, like water or saline solution, might spill on the equipment unless drape or bag the system.

Electrical Shock Electrical circuits inside the equipment use voltages that are capable of causing serious injury or death from electrical shock.

WARNING: This equipment contains high power electrical components and should be serviced by personnel familiar with the circuitry and its operation. Areas where dangerous voltages exist include: • • • •

Monoblock high voltage generator/X-ray tube assembly - 80,000 volts Image Intensifier Assembly - 25,000 - 30,000 volts Line Voltage - 120 VAC Monitors in Workstation (15KV).

MINI6600TM Imaging System Service Manual - Introduction Observe the following precautions to service the equipment with the covers removed:

WARNING: Observe the two person rule when working near high voltages. One person must remain clear of the machine and be prepared to turn it off in an emergency. High voltage capacitors can retain a charge even when power is removed from the system. Avoid touching these unless you are certain the charge has been removed (shorted to ground). High energy capacitors in the system should be shorted to ground through an adequate resistance to avoid potential burn hazards .

Explosion Hazards WARNING: Never operate the system in the presence of flammable anesthetics, or other flammable or explosive liquids, vapors, or gases. Vapors and gases can be ignited by electrical arcs that can occur during the normal operation of switches, circuit breakers, push buttons, and other circuit components. If flammable substances are present before the system is turned ON: 1. Do not plug the system in 2. Do not turn the system ON.

If flammable substances are detected after the MINI6600 has been turned ON perform the following: 1. 2. 3. 4. 5.

Do not touch any of the controls, or switches Do not turn the system OFF; and do not unplug the system Evacuate all personnel immediately Ventilate the room to clear the air of the flammable vapor or gas Remove any volatile liquids that are producing flammable vapors and relocate them to a safe storage area.

MINI6600TM Imaging System Service Manual - Introduction X-radiation Hazard The X-ray tube assembly produces X-radiation when energized. Never operate this device without X-ray shielding in place. Use lead shielding and draping to protect personnel.

Safety Interlock Under no circumstances should the safety interlock in the system be by-passed or otherwise disabled.

Warning Labels The following warning labels may be found on the system:

X-ray Safety Warning

WARNING THIS X-RAY UNIT MAY BE DANGEROUS TO PATIENT AND OPERATOR UNLESS SAFE EXPOSURE FACTORS AND OPERATING PRACTICES ARE OBSERVED.

MINI6600TM Imaging System Service Manual - Introduction Warning Symbols The following symbols may be found on the Mini6600:

DANGEROUS DANGE ROUS VOLT VOLTAGE PRESENT

Dangerous voltages are present. Use safety precautions.

DANGEROUS DANGE ROUS VOLT VOLTAGE PRESENT

Dangerous voltages are present. Use safety precautions.

MINI6600 MINI 6600TM Imaging System Service Manual - Introduction

PROTECTIVE EARTH GROUND

The protective earth ground should be the last electrical connection broken and the first electrical connection made during servicing procedures. EMITTING X-RAY SOURCE

This symbol indicates the presence or potential of producing ionizing X-radiation. Use Use appropriate precautions.

MINI6600 MINI 6600TM Imaging System Service Manual - Introduction

POTENTIAL EQUALIZATION

GRN/YEL wire indicates protective earth conductors, accessible parts connected to earth parts, and potential equalization conductors.

NON-ANESTHETIC PROOF

This symbol indicates that the equipment is non-anesthetic proof and should not be operated in the presence of flammable vapors, liquids or other substances.


ATTENTION This symbol cautions you to refer to the service manual for additional information.

!


UNAUTHORIZED MODIFICATIONS Unauthorized changes or modifications could have hazardous consequences. Do not make changes or modifications unless specifically authorized by OEC. Make modification requests by obtaining a field modification request form from OEC Medical Systems. NOTE: All OEC Mini6600 systems comply with International Electrotechnical Commission safety standard IEC601. Do not connect any external device to the system that does not meet the requirements of applicable IEC standards. Only devices provided or approved by OEC Medical Systems, Inc. should be connected to the system.

When properly assembled with a compatible beam limiting device, this diagnostic source assembly will fully meet the Federal Performance Standards for Diagnostic X-ray Systems and their Components (21CFR 1020.30-32). Providing no components or parts are removed from the unit and no unauthorized adjustments are made in the beam limiting device or tube housing assembly. · · · ·

Follow approved procedures when removing any part of the housing or beam limiting device. Follow approved procedures when adjusting any part of the beam limiting device. All hardware (i.e. screws, nuts, bolts, etc.) must be re-installed on the equipment. All EMI-RFI shielding components must be re-installed on the equipment. Any damaged shielding gasket must be replaced to ensure that the system complies with EMI-RFI regulations.


Certified Components The following certified components within the Mini6600 are critical to maintain system performance. Modification (repair/replacement and some adjustments) of these components require that Form 2579 be completed and filed with OEC Medical Systems, Inc., the FDA, and the State Office. Complete Report of Assembly, FDA Form 2579, whenever the following assemblies are replaced in their entirety, per 21 CFR 1020.30 (d)(1)(2). • Beam Limiting Device • Image Intensifier Assembly • Monoblock X-ray Generator/Tube Assembly

MINI6600TM Imaging System Service Manual - System Overview SYSTEM OVERVIEW

OVERVIEW This section will familiarize you with the MINI6600 System. The following topics provide an introduction to the system: • System Controls • Cover Removal • Component Locations

System Controls This section illustrates the operator controls on the MINI6600. Utilize the controls on the Control system to operate the image mode selection, image enhancement and a VCR.

FIGURE 1 - English Control Panel

MINI6600TM Imaging System Service Manual - System Overview The Front Panel controls fluoro modes, averaging and L-R image movement. FLUORO

ONE-SHOT ENHANCED

AVERAGING

L

R

FIGURE 2 - Front Panel Utilize the keyboard for entering patient annotation, cursor movement, and choosing special system functions, found along the top of the keyboard. HELP

PATIENT (ANNOTATE)

!

@

1

2

Shift

Alt

E

S

A

Ctrl

Z

IMAGE DIR

%

$ 4

# 3 W

Q

tab

DISK VIEW

X

T

F

D

C

& 7

^ 6

5 R

MARKERS

Y

G

V

* 8 U

H

B

X-RAY SUMMARY

( 9 I

O

M

TEST PATTERN

_

) 0

K

J

N

SPECIAL APPS

< ,

+

-

: ; > .

SETUP OPTIONS

Backspace

= { [

P

L

CUSTOMIZE

Enter

} ]

ESC

PgUp

" ' ?

Shift

/ | \

~ `

FIGURE 3 - Keyboard

PgDn

MINI6600TM Imaging System Service Manual - System Overview Foot and Hand Switches

2 3 1

FIGURE 4 - Foot and Hand Controls 1. Footswitch X-ray On switch. 2. Footswitch printer activation switch. 3. Handswitch X-ray On switch (option).

MINI6600TM Imaging System Service Manual - System Overview Cover Removal C-Arm Covers To remove the C-Arm covers perform the following steps:

WARNING: Electrical circuits inside the equipment use voltages that are capable of causing serious injury or death from electrical shock. 1. Unplug the system from AC power. 2. Remove the camera cover by removing the six cover screws on the bottom of the Image Intensifier tube as shown below. 3. Remove the X-ray tube/power supply cover by loosening the eight screws around the edges of the X-ray tube/power supply assembly and lifting the cover upward off of the assembly.

FIGURE 5 - C-Arm Cover Removal

MINI6600TM Imaging System Service Manual - System Overview Workstation Covers

FIGURE 6 - Remove the covers

MINI6600TM Imaging System Service Manual - System Overview 1. Rotate each of the eight 1/4-turn fasteners on each side of the rear cover as shown below.

FIGURE 7 - Loosening Rear Cover Screws

2. Move the bottom of the cover outward a few inches and then move the entire cover downward as shown in Fig. 8.

FIGURE 8 - Rear Cover Removal

MINI6600TM Imaging System Service Manual - System Overview

DO NOT REMOVE THESE COVERS

3. Pull the left and right side covers to the rear. The covers fit into a slot in the base and in the nonremovable handle cover as shown.

WARNING: Unplug the system from AC power before you remove the front cover. With the system plugged into AC power, there will be a +12V on the keyswitch wiring.

SIDE COVERS

NOTE: Separate the 4-pin Molex connector (J15-P15) on the right side of the frame before you remove the front cover. These wires connect to the key switch mounted on the front cover.

FIGURE 9 - Side Cover Removal

MINI6600TM Imaging System Service Manual - System Overview FIGURE 10 - Front Cover Removal 4. Grasp the front cover near the bottom with both hands and apply equal pressure to both sides. Lift the cover upward to free the two ball-nut fasteners mounted on the bottom edge of the cover. 5. Move the cover upward under the keyboard. 6. Move the bottom outward, then downward, to free the cover as shown.

7. Remove the monitor cover by grasping the cover on each side and pulling the cover to the rear (see FIGURE 11). This will disengage the ball-nut fasteners, two at the top of the cover and two at the bottom of the cover, near each side.

FIGURE 11 - Monitor Cover Removal

MINI6600TM Imaging System Service Manual - System Overview Keyboard Disassembly 1. Remove the six #6 Torx-head screws located under the front lip of the keyboard as shown below. FIGURE 12 - Keyboard Retaining Screw Removal FL UO RO

ON E -S HO T

EN HA NCE D

A VE

RA GING

L

R

2. Grasp the top keyboard cover on each side and pull it forward and to one side a short distance and separate it from the base and the monitor bezel as shown below.

KEYBOARD RETAINING SCREW (6 - #6 TORX HEAD)

3. Move the top of the keyboard to the front and turn it over to expose the printed circuit card under the keytops and the Control Panel Processor PCB. 4. Disconnect the ribbon cable plugs from their sockets on the Control Panel Processor PCB. 5. Remove the # 8 Torx-head screws on the keyboard base to free the three black ground wires. FIGURE 13 - Keyboard Removal


NOTE: Normally, you should not remove the QWERTY keyboard, Control panel, and Front Panel from their mountings, however, if you must remove them, take care not to substitute the mounting screws or damage to the key panels will result.

Keyboard Assembly Replace the keyboard in the opposite manner to the above disassembly. When replacing the keyboard assembly, be sure to fold the cables and ground wires back over the top of the Control Panel Processor PCB and do not pinch the wires. 1. Place the keyboard assembly against the bottom of the monitor bezel and push firmly to seat the keyboard assembly between the bezel and flat spring attached to the monitor base plate.

NOTE: The cutout on the lower rear lip of the keyboard assembly should slip between the spring and the bezel. The raised ridges along the top rear of the keyboard assembly should be under the monitor bezel to firmly seat the assembly.

2. Replace the screws under the front lip of the keyboard assembly and test system operation from the keyboard.

MINI6600TM Imaging System Service Manual - System Overview Component Locations For more assembly information, refer to the Illustrated Parts section. X-RAY HEAD

ROTATION ARM

ARTICULATING ARM

C-ARM

IMAGE HEAD

SUPPORT ARM

FIGURE 14 - C-arm Component Locations


MONITOR COVER

CONTROL PANEL ASSEMBLY

MONO BLOCK X-RAY SOURCE

REAR COVER

RIGHT SIDE COVER LEFT SIDE COVER

IMAGE INTENSIFIER TUBE AND CAMERA

FIGURE 15 - 6 inch I.I. with Manual Collimator


FIGURE 16 - Workstation Component Locations

MINI6600TM Imaging System Service Manual - System Overview Workstation Component Locator

Area

MONITOR COVER

Components

MONITORS AND CIRCUIT BOARDS CONTRAST/BRIGHTNESS PCB CONTRAST/BRIGHTNESS POTENTIOMETERS INFRARED RECEIVER ASSEMBLY

AC POWER STRIP CONTROLPANEL KEYBOARD FRONT PANEL ASSEMBLY CONTROLPANEL CONTROLPANEL PROCESSOR PCB

FRONT COVER

ISOLATIONTRANSFORM ER T1 (FOR REMOVAL)

Left Cover

Electronics Box Side Door DC Power Distribution PCB Power Supply PS1 (+5, -5, +12, -12) Power Control PCB Power Supply PS4 (+24V) Terminal Block TB2 CB2, CB 3 J12, J13, J14, J16 Secondary Side of Isolation Transformer T1

Right Cover

Surge Suppressor PCB CB1 J6 Primary Side of Isolation Transformer T1 Power Cable Input 6600 Controller PC

MINI6600TM Imaging System Service Manual - System Overview EMI, ESD Considerations The MINI6600 system uses static-sensitive integrated circuits and other components. Failure to use a grounding wrist strap could cause serious static electricity damage to printed circuit boards and active electronic components. Securely ground the wrist strap before attempting any repairs. The MINI6600 System is certified for minimal electromagnetic interference. If you remove the cover over the 6600 Controller PCB for service or for other reasons, you must replace all hardware and shielding gaskets securing the cover and PCB. Failure to reuse all hardware could have unfavorable effects on the EMI rating.

CAUTION: When replacing the EMI/RFI covers over the Control Panel Processor PCB, do not damage the metal gasket material around the edge of the PCB box. Replace the gasket material if damaged to ensure compliance with EMI/RFI regulations. When replacing a cover, do the following: 1. Start with one corner of the cover over the box 2. Push the cover diagonally from the corner against the spring tension of the gasket material. 3. Make sure the edges of the cover are not pushing on the mounting edge of the gasket material and gently push the cover down over the box.

MINI6600TM Imaging System Service Manual - Power Distribution

POWER DISTRIBUTION OVERVIEW It is easier to understand the information provided in this section when referencing schematics from the schematic manual. Use the correct interconnect diagrams and circuit board schematics for your system indicated below. • Mini6600 Interconnect Diagram

Schematic # 00-878780 • Workstation Interconnect Diagram

Schematic # 00-877970 • Surge Suppressor PCB

Schematic # 00-876784 • Power Control PCB

Schematic # 00-878001 • DC Power Distribution PCB

Schematic # 00-876839

MINI6600TM Imaging System Service Manual - Power Distribution Workstation Power Cord Assemblies Two power cord assemblies are available for the Mini6600 system, one is for use with 200 to 250 VAC, one for 100 to 127 VAC. Connect both versions of the power cord assemblies to the Surge Suppressor PCB within the System. Part of the power cord assembly is a green lamp that illuminates to indicate that AC is present within the System when you plug the system into a wall socket. “Power Distribution”

LAMP DS1

POWER CORD ASSEMBLY

CIRCUIT BREAKER CB1 LINE AC

CIRCUIT BREAKER CB2

CIRCUIT BREAKER CB3

FIGURE 1 - System Power Components

MINI6600TM Imaging System Service Manual - Power Distribution Circuit Breakers CB1 CB2 CB3

A 10 Amp, reset only breaker, on the AC cord assembly and in line with incoming AC to the Workstation. A 4 Amp, reset only breaker, in line with AC going to PS2 for the Mini C-Arm. A 5 Amp, reset only breaker, in line with AC that is distributed throughout the Workstation. CB3 is located next to CB2.

POWER SUPPLY PS1 +12V, -12V, +5V, -5V LOCATED INSIDE ELECTRONICS BOX ON THIS HINGED PANEL

POWER CONTROL PCB

SURGE SUPPRESSOR PCB

POWER SUPPLY PS2 +24V ISOLATION TRANSFORMER

FIGURE 2 - Workstation Power Components


Surge Suppressor PCB NOTE: Refer to Schematic #876784.

The Surge Suppressor PCB is located on the bottom right hand side of the Workstation. Remove the right side cover and a clear plastic safety cover for access. The purpose of the Surge Suppressor PCB is to protect the equipment by absorbing surges and spikes during typical use. This board also prevents excessive inrush current when the equipment is powered on. There are four thermistors used for current suppression, RT1-RT4. Two thermistors are in series in each neutral line. RV1 and RV2 are 300 VAC MOV varistors used in conjunction with E1 and E2 gas tube surge arrestors for surge suppression in the common mode (interference on all AC lines). RV3 and RV4 are 150 VAC MOV varistors used with C2 and C3 for surge suppression in the normal mode (interference between line and neutral).

MINI6600TM Imaging System Service Manual - Power Power Distribution Distr ibution Workstation Isolation Transformer

PRIMARY

The Workstation isolation transformer has two isolated secondary transformers. One winding is a 230V center tap winding rated for 4A output. Two Two phases of 115V (nominal), AC1 and AC2 are directed to the Workstation via the Power Control PCB.

128 120 110 104 98

BROWN

WHITE/BLUE

WHITE/BROWN

BLUE

AC1

COM

CO M

The white/blue wire should be on Primary 1 COM, and the blue wire should be on Primary 2 COM. Strap the brown and white/brown wires to match the input line voltage as indicated by the following table:

128 120 110 104 98

AC2

PRIMARY 2

COM

98V

105V 98 to 107

PRIMARY 1

CT

The second winding provides 115 VACPH VACPH and 115 VACRTN to PS2 for the Mini C-Arm.

Transformer Tap Input Volt Range

SECONDARY

110V

104V

128V

120V

PRIMARY 1

98V

COM

128V

110V

104V

120V

PRIMARY 2

FIGURE 3 - Isolation Transformer

115V 108 to 117

1 2 5V 118 to 127

MINI6600TM Imaging System Service Manual - Power Power Distribution Distr ibution Power Control PCB NOTE: Refer to schematic #00-878001. #00-878001. The Power Control PCB is located in the bottom of the Workstation on the left hand side as shown in FIGURE 2. Gain Gain access by removing the left side panel and a clear plastic, protective shield. AC1-T1 and AC2-T1 from the T1 isolation transformer enters the Power Control PCB at P1 on pins 4 and 6, then exit at P4 pin 1 (AC1_CART) and P4 pin 4 (AC2_CART) to supply power to the AC outlet strip, fans B1, B2, B3 and System Power Supply PS1 (+12 v, -12v, +5v, -5v). AC 2 also exits as AC2_PS4 at P6 pin 1 to su pply PS4 (+24v). Both PS1 and PS4 power the Workstation. See t he Workstation Interconnect Diagram for for details of AC distribution. AC_T1 and RTN_T1 from the isolation transformer enters the Power Control PCB at P1 on pins 1 and 3, then exit at P5 pins 1 (115VAC_PH) and P5 pin 4 (115VAC_RTN) to PS2 (+5v, +12v, -12v, +24v) which powers the C-Arm. The +12V_KEY is created on the Power Control PCB using AC1 through circuit breaker CB1, transformer T1, bridge CR1, and voltage regulator U1. The +12V_KEY is sent to the keyswitch on the front of the Workstation and to K3 and K4. When you close the keyswitch, keyswitch, the +12V (Key_Pwr) is sent to the following places on the Power Control PCB: • K1 which supplies power to PS1 and PS4. • K2 which switches +24 volts from PS4 to the monitors through

CB2 and CB3. • Through jumper E7 pins 3 and 2 to input pins 4 and 5 of inverting buffer U2. Output pins 13 and 12 of U2 go low. This provides a current path through P2 pins 1 and 3 (LOOP2 and LOOP1) to turn on K3 and K4 that supplies AC and RTN to PS2. This powers the X-ray source, Image Intensifier, CCD Camera and the 6600 Controller Controller PCB in the C-Arm.

WARNING: The AC return (RTN) line carries a voltage potential of 60 VAC VAC and 80 VDC relative to ground.

MINI6600TM Imaging System Service Manual - Power Power Distribution Distr ibution

Circuit Breakers and Fuses CB1

A 0.2 Amp push button breaker, in line with AC to T1 provides the +12V for key power circuitry.

CB2

A 3 Amp push button breaker, in line with +24V to the right monitor.

CB3

A 3 Amp push button breaker, in line with +24V to the left monitor.

F1

A 2 Amp, 125 V, metric sized, slow-blow fuse, in line with AC to PS4 protects the +24V power supply for the monitors. Fuse one is a spring-loaded fuse holder with a quarter turn cap (use a thin blade screwdriver to remove the cap).

MINI6600TM Imaging System Service Manual - Power Power Distribution Distr ibution Test Points TP1 TP2

AC from from Isolati Isolation on Trans Transfo former rmer T1 T1 (RTN_T1 (RTN_T1)) to PS2 (115V (115VAC AC_R _RTN) TN) locate located d in circuit circuit betwee between n K3 and K4, typically typic ally 115 VAC VAC with respect to TP2. AC from from Isolati Isolation on Transf ransformer ormer T1 (AC_T1 (AC_T1)) to PS2 (115V (115VAC AC_PH) _PH) locat located ed in circuit circuit betwe between en K3 and K4, typically 115 VAC with respect to TP1.

WARNING: The AC return (RTN_T1) line carries a voltage potential of 60 VAC VAC and 80 VDC relative to ground.

Workstation Power Power Distribution Dist ribution AC1_CART and AC2_CART leave the Power Control PCB at connector P4 and are distributed by terminal block TB2. Circuit breaker CB3 is in-line between isolation transformer T1 and the Power Control PCB. AC1_CART provides power to fan, B1, and the Workstation power supply PS1 (+5V, -5V, +12V, -12V). AC2_CART provides power for fans B2 and B3. AC1_CART and AC2_CART provide power to a 115/230 VAC outlet strip used for connecting the peripheral equipment such as the VCR and thermal image printer o ptions. If the system syst em has Thermal Image capability and an internal VCR, an additional cooling fan B4 (show n in FIGURE 2) is powered from the outlet outl et strip. str ip. You can access the power strip, located inside the Workstatio n, by removing the th e rear cover as shown in FIGURE 4. The DC outputs of PS1 (+5V, (+5V, -5V, -5V, +12V, +12V, -12V) go to the DC Power Power Distribution Distr ibution PCB, located in the Workstation electronics box. These voltages are distributed through out the Workstation. Workstatio n. PS1 is mounted on the inside of the electronics box on the hinged side panel as shown in FIGURE 4. PS4 (+24 (+24 VDC) is located at a t the bottom of the Workstation on the left hand side, near the Power Control PCB as shown shown in FIGURE 2. PS4 PS4 provides the left and right monitors with +24 VDC via the Power Control PCB (see (see Power Control PCB for details).


120/240VOLT AC OUTLET STRIP

DC POWER DISTRIBUTION PCB

POWER SUPPLY PS1 +5V, -5V, +12V, -12V

FANS

FIGURE 4 - Workstation Components

MINI6600TM Imaging System Service Manual - Power Distribution DC Power Distribution PCB NOTE: Refer to schematic #876839. The information for this PCB applies to all system serial numbers. The function of the DC Power Distribution PCB is to distribute the DC outputs from PS1 throughout the Workstation. This PCB is inside the Workstation electronics box in the upper rear corner. To access, remove the rear cover, the left side cover, the clear plastic protective shield, and open the side panel of the electronics box. The outputs from PS1 (+5V, -5V, +12V, -12V) are inputs at P9 and distributed as follows: • • • • • •

P1 - Aux. Interface PCB, Video Switching PCB, and Image Processor PCB P2 - AT Motherboard P3 - Control Panel Processor PCB, and Contrast/Brightness Control PCB P4 - Hard Drives P6 - Floppy Drive P8 - Elapsed Time Meter

U1 monitors the +5V. If the +5V falls below +4.65V the SYSRST* (System Reset) signal will go low and reset the AT Motherboard. SYSRST* will stay low until the +5V line rises above +4.7V. U1 is also active at power up/ down.

Test Points • TP1 Ground

TP2 +5V TP3 +12V TP4 -12V TP5 -5V

MINI6600TM Imaging System Service Manual - Power Distribution Circuit Breakers Circuit Breakers 1 through 9 are all 5 Amp, SPST, 250 VAC, horizontal PCB mounted.

CB1

+5 VDC to AT Motherboard

CB2

+12 VDC to AT Motherboard

CB3

+5 VDC to hard drives

CB4

+12 VDC to hard drives

CB5

+5 VDC to floppy drive and hard drives

CB6

+5 VDC to Control Panel Processor PCB and Contrast/Brightness Control PCB

CB7

+12 VDC to floppy drive and elapsed time meter.

CB8

+12 VDC to Control Panel Processor PCB, Contrast/Brightness Control PCB, Aux. Interface PCB, Video Switching PCB, and Image Processor PCB.

CB9

+5 VDC to Aux. Interface PCB, Video Switching PCB, and Image Processor PCB.

MINI6600TM Imaging System Service Manual - Power Distribution Workstation DC Measurements and Adjustments PS4 (24V) Remove the monitor cover and measure the +24V on the monitor circuit boards at J6 between the black (GND) and yellow (+24V) wires. Adjust R11 on PS4 to +24 VDC (±1V) if necessary. See FIGURE 5 for the location of R11.

YELLOW

BLACK

WHITE

WHITE/RED

DO NOT ADJUST

R6

R11 V ADJ

FIGURE 5 - Workstation Power Supply PS4 - +24V

MINI6600TM Imaging System Service Manual - Power Distribution PS1 (5V and 12V) Measure the voltages at the following test points on the Video Switching PCB and adjust as required with R53 (+5) and R21 (+12) on PS1. Refer to FIGURE 6 below for locations of R53 and R21. GND

TO

ADJUST

MEASUREMENT

TOLERANCE

TP25 TP25

TP24 TP27

Not Adjustable Adjust PS1 R53 (OUT1) Adjust PS1 R21 (OUT 2) Not Adjustable

- 5.0 VDC

±0.75 VDC

+ 5.0 VDC

±0.75 VDC

+12 VDC - 12 VDC

±1 VDC ±1 VDC

TP25 TP25

TP28 TP19 F1 250V 4A FAST BLOW

OUT 2 V ADJ

R21

C18 C5 C32 C29 C42 C28 C30 C31 PS1 P3 C51

OUT 1 V ADJ

R53

R43

DO NOT ADJUST

FIGURE 6 - Workstation Power Supply PS1 (+5V, -5V, +12V, -12V)

MINI6600TM Imaging System Service Manual - Power Distribution C-Arm Power Distribution Power for the C-Arm portion of the system originates from PS2. PS2 is located on the right side of the workstation behind and below the 6600 Controller PCB. To access the power supply remove the EMI / RFI cover. PS2 is a switching power supply that provides +5,+12,-12 and +24 volt to power the C-Arm.

6600 CONTROLLER PCB MOUNT

POWER SUPPLY PS2

6600 CONTROLLER PCB POWER SUPPLY EMI SHIELD 6600 CONTROLLER PCB EMI SHIELD

FIGURE 7 - C-Arm Power Components

MINI6600TM Imaging System Service Manual - Power Distribution C-Arm DC Measurements and Adjustments PS2 (+5V, +15V, -15V, +24V) PS2 output voltages are adjusted using the voltage adjustment pot shown in FIGURE 8. Measure the power supply voltages on the 6600 Controller PCB at the test points listed below: - Lead

+ Lead

Supply Tolerance

Reading Range

TP2 TP2 TP2 TP2 TP2 TP2

TP42 TP37 TP23 TP39 TP43 TP44

+24.0 VDC +10%/-5% +12.0 VDC ±3% +5.0 VDC ±2% +5.00 VDC ±2% -10.00 VDC ±2% -12.0 VDC ±3%

+22.8 to +26.4 VDC +11.6 to +12.4 VDC +4.9 to +5.1 VDC (VCC) +4.9 to +5.1 VDC (+5.00 V Ref) -9.8 to -10.2 VDC (-10.00 V Ref) -11.6 to -12.4 VDC

NOTE: The 6600 Controller PCB contains a circuit breaker (CB1) to protect the +24 volt supply to the monoblock X-ray source. 1 +5 2 VOLTAGE ADJUSTMENT

+5

3 PIN 1

J2

POWER FAIL DETECT CIRCUIT

T1

4

D-GND

5

D-GND

6 7

A-GND

8

+12

9 10 -12 11 KEY 12 +24

PIN 1

C6

J1

L1 F1

1

GROUND

3

NEUTRAL

5

LINE

FIGURE 8 - C-Arm Power Supply PS2 (+5V, +15V, -15V, +24V)

MINI6600TM Imaging System Service Manual - C-Arm Control

C-ARM CONTROL OVERVIEW This section describes the following circuit boards and components that control the MINI6600 System. • • • • •

6600 Control Panel 6600 Controller PCB Handswitch and Footswitch 6600 Monoblock X-ray Source Slide Collimators

All control signals for the monoblock X-ray source are provided by the 6600 Controller PCB. The Controller PCB receives all the inputs from the control panel, handswitch, footswitch, X-ray switch, monoblock X-ray source and the workstation to control of the X-ray system. The information in this section is easier to understand while referring to the following schematics: • 6600 Controller PCB

Schematic # 00-878565 •

Mini C-Arm Interconnect Diagram Schematic # 00-878780

MINI6600TM Imaging System Service Manual - C-Arm Control Component Locations The Mini-C Control Panel fits within the Workstation Control Panel Assembly. The 6600 Controller PCB is in the lower right side of the Workstation as shown in FIGURE 1.

Control Panel 6600 Controller PCB

FIGURE 1 - Locations of Control Panel and 6600 Controller PCB Assembly

MINI6600TM Imaging System Service Manual - C-Arm Control CAUTION: When replacing the EMI/RFI covers over the 6600 Controller PCB or PS2, ensure that no damage occurs to the metal gasket material around the edge of the PCB or power supply box. Replace the gasket material, if damaged, to ensure compliance with EMI/RFI regulations.

When replacing a cover: 1. 2.

3.

Start with one corner of the cover over the box Push the cover diagonally from the corner against the spring tension of the gasket material. Make sure the edges of the cover are not pushing on the mounting edge of the gasket material and gently push the cover down over the box.

Control Panel The Control Panel shown in FIGURE 2 works with the 6600 Controller PCB and the Control Panel Processor PCB. The 6600 Controller PCB reads the buttons indicated by the highlighted area in the illustration.

FIGURE 2 - C-Arm Control Panel

MINI6600TM Imaging System Service Manual - C-Arm Control Control Path

MINI C-ARM CONTROL PANEL

WORKSTATION FRONT PANEL CONTROL PANEL AND KEYBOARD USER

USER

INPUT

INPUT

SWITCH READINGS

C-ARM

WORKSTATION

WORKSTATION CONTROL PANEL PROCESSOR PCB

SWITCH READINGS RS-232

6600 CONTROLLER PCB A20

A20 TO A9 CABLE AUX INTERFACE PCB RS-232

A9

RS-232

COMMUNICATIONS PCB

HAND SWITCH PC BUS

386 FOOT SWITCH

FIGURE 3 - Control Path Diagram

MOTHERBOARD

MINI6600TM Imaging System Service Manual - C-Arm Control 6600 Controller PCB The 6600 Controller PCB provides all the control signals for the monoblock X-ray source. The 6600 Controller PCB receives all the inputs from the control panel buttons, handswitch, footswitch, monoblock X-ray source and the Workstation to control the X-ray system. An EMI/RFI shield covers the 6600 Controller board shown below in FIGURE 4. 6600 CONTROLLER PCB MOUNT

POWER SUPPLY PS2

POWER SUPPLY SHIELD

6600 CONTROLLER PCB 6600 CONTROLLER PCB EMI SHIELD

FIGURE 4 - 6600 Controller PCB Assembly NOTE: All hardware (i.e., nuts, bolts, screws, etc.) must be re-installed after servicing in order to ensure compliance with EMI/RFI regulations.

MINI6600TM Imaging System Service Manual - C-Arm Control Microprocessor The microprocessor U10 is an 80C196KC microprocessor driven by a 7.37 MHz. clock. Crystal Y1 and flip flop U15 provides the clock. Monitor the clock signal to U10 at TP5 (OSC) on the 6600 Controller PCB.

Reset Controller Circuit The reset controller U26 provides the reset signal to the microprocessor U10, decoder pals U5 and U9 and serial communications controller U1. The reset line is held low for approximately 300 ms by U26 after +5 volts has risen above 4.75 vdc. The reset signal is set high and is applied to U45 pin 12 (AND gate input). U45 pin 13 (AND gate input), from the window manager, is set high after the serial prom U18 configures the window controller U17. The microprocessor reset line (TP1) is set high releasing the microprocessor. The microprocessor U10 loads the program from EPROM U6. As the program begins to run, the P1.4 output of U10 generates a reset signal that resets the watchdog timer. The watch dog timer input is reset approximately every 18 ms by the software.

Automatic Exposure Control Automatic Exposure Control drives the technique in the auto mode. The Controller PCB receives a video signal from the CCD chip in the camera that enters the Controller PCB at J5. The video signal is proportional to the amount of light entering the camera before applying black level and gain to the video signal. The video signal is AC coupled to a DC restoration clamp (U45) and applied to a low pass filter (R80 and C89) to develop an average video signal level. The microprocessor U10 at AD input 5 measures the average video input 5 to control the technique produced by the X-ray source. The window manager (U17) produces a sample window for the average video level detector. Software loaded into EPROM U8 controls the size of the sample window.

Memory The 6600 Controller PCB contains the following memory devices: • • • •

EPROM U6 contains the program to run the 6600 Controller PCB. Static ram U7 (32K x 8). Serial prom U18, contains configuration data for the window manager U17 and used for Automatic Exposure Control (AEC). EEPROM U8 (2K x 8) contains 50 or 60 Hz data for the AEC window and the technique table for AEC as well as monoblock generator calibration data. The workstation software downloads this data.

MINI6600TM Imaging System Service Manual - C-Arm Control Control Panel Interface Control Panel Buttons The keypad scan circuit located on the 6600 Controller PCB reads the C-Arm Control Panel buttons shown in FIGURE 2. The Control Panel buttons are clocked by row pulses on three lines. These three lines of row pulses exit the 6600 Controller PCB at P9 pins 3, 2 and 1 and go to the control panel. Decoder PAL U9 pin 18 (ROW_WRITE) and latch U11 pins 17, 18 and 19 (ROW_3_OUT*, ROW _2_ OUT* AND ROW_1_OUT) using data from the data bus generate the row pulses. The Control Panel buttons are read by using three column lines that enter the 6600 Controller PCB at P9 pins 6, 5 and 4 from the Control Panel. When you press a button on the control panel, pulses from the control panel latch onto the data bus by latch U2 pins 17, 18 and 19. U2 is clocked by COL/SW_READ* from pal U5 pin 16.

Control Panel LED’s The control-panel LED circuit on the 6600 Controller PCB drives the C-Arm Control Panel LED’s shown in FIGURE 3. LED +5VDC from the 6600 Controller PCB supplies the LED’s. LED +5VDC exits the 6600 Controller PCB at P-9 pin 11 and goes to the Control Panel. The lines from the LED’s enter the 6600 Controller PCB at P9 pins 7 through 15. You turn the LED’s on by providing a ground path from the LED’s through resistor pack R31 to U13 that acts as a current sink. U13 latches data from the data bus by using the LED_WRITE signal from pal U9 pin 17 to turn on each LED.

Serial Communications The following acronyms are used as part of the signal names along with the designators used to specify the channel, source, etc. • • • •

TXD = Transmit Data - connected to RXD of receiving PCB. RXD = Receive Data - connected to TXD of sending PCB. RTS = Request To Send - connected to CTS of receiving PCB. CTS = Clear To Send - connected to RTS of sending PCB.

MINI6600TM Imaging System Service Manual - C-Arm Control 6600 Controller PCB and Workstation Communications Establish communication between the C-Arm and the Workstation during the boot process. During normal operation, the 6600 Controller PCB and the 386 Motherboard send information such as: • • • • • •

Shot log file information from the C-Arm to the Workstation KV, µA and exposure time to the Workstation’s left monitor for display during X-rays Horizontal Reverse and horizontal Normal image reversal Camera rotation position for icon display during camera rotation Video stable during X-rays to the Workstation Load EEPROM data from the Workstation software to the 6600 Controller PCB.

Communications from the 6600 Controller PCB to the 386 Motherboard The TXD and RTS signals from the 6600 Controller PCB exit the micro controller U10 at pins 18 and 39. TXD and RTS signals from U10 are level shifted from TTL to RS232 levels by U27, (Monitor TXD and RTS at TP21 and TP24) and exit the board at P8 pins 10 and 9. TXD and RTS pass through the A20P8 to J14 and A9P10 to J12, J13 and J14 cable assemblies and enter the Workstation Aux. Interface PCB at P10 on pins 15 and 14. TXD and RTS signals exit the Aux. Interface PCB at P14 pins 21 and 18 and go to the Communications PCB P3 pins 21 and 18. They are inverted and returned to TTL levels by U15 and enter DUART U27 on pins 31 and 7 where they become RXD and CTS. U27 interfaces the signals to the data bus of the 386 Motherboard. Refer to FIGURE 5 to see the communication path.

Communications from the 386 Motherboard to the 6600 Controller PCB The 386 Motherboard communicates over the data bus to DUART U27 on the Communications PCB. TXD (pin 30) and RTS (pin 29) leave DUART U27 as TTL level signals, which go to U16, where the signals are level shifted to RS232 levels. The TXD and RTS signals leave the Communications PCB at P3 pins 28 and 26. TXD and RTS then enter the Aux. Interface PCB at P14 pins 28 and 26 and pass through the board and exit at P10 on pins 13 and 12. TXD and RTS from the Aux. Interface PCB go through the A9P10 to J12, J13, J14 and A20P8 to J14 cable assemblies and enter the 6600 Controller PCB at connector P8 on pins 8 and 7. Monitor the TXD and RXD signals, that originated from the Communications PCB, on the 6600 Controller PCB at TP22 (TXD) and TP18 (RXD). TXD and RXD signals are sent to U27 and shifted to TTL levels and are sent to micro controller U10 at pins 17 and 44. Refer to FIGURE 5 to see the communication path.


A20P8 TO J14 CABLE ASSEMBLY U10 RXD 18

U27

TP22

TP18 CTS 44

P8 8 7 10 9

J14 P14 8 8 7 7 10 10 9 9

P10 13 12 15 14

AUX. INTERFACE P14 PCB 28 26 21 18

AT COMMUNICATIONS PCB P3 28 26 21 18

U16

U15

TP21

U27 30 TXD 29 RTS 31 RXD 7 CTS

8

TXD 17 TP24 RTS 39

A9P10 TO J12, J13, J14 CABLE ASSEMBLY

6600 CONTROLLER PCB

FIGURE 5 - System Communications Path

DATA 386 AT MOTHERBOARD

MINI6600TM Imaging System Service Manual - C-Arm Control Interlocks The 6600 Controller PCB provides the interlock circuit to prevent the monoblock X-ray source from making exposures in an uncontrollable condition. PS2 (+24 volts) supplies power to the monoblock X-ray source to produce the high voltage and the filament current. The function of the interlock circuit is to interrupt the +24 volts going to the monoblock X-ray source in case a fault occurs in the X-ray system.

PS2 +24 V

P2 13

TP42 +24 P13 VDC 3

CB1 1.6A

LF6 1 2

u PROC U10 27

P2 4 5 6

J2 4 5 6

INTERNAL RELAY

INTERNAL HIGH VOLTAGE & FILAMENT CIRCUITS

+5V 8 U29 15 14

MONO BLOCK X-RAY SOURCE

TP31 HV INTERLOCK *

6600 CONTROLLER PCB

+24 TP42 +24 VDC GND +24 TP31 HV INTERLOCK * GND 250 MS

25 MS

FIGURE 6 - High Voltage Interlock Circuit


During Boot Up 1. 2. 3.

4. 5.

6. 7.

Establish the high voltage interlock at the beginning of the boot process when you turn on the system key switch. To understand this sequence utilize the High Voltage Interlock Circuit shown above. As the voltages from PS2 come up and stabilize the +24 volts enters the 6600 Controller PCB at P133. Monitor the +24 volts at TP42 on the 6600 Controller PCB. The +24 volts passes through circuit breaker CB1 and line filter LF6 and leaves the 6600 Controller PCB at P2 pins 4 and 5. The +24 volts also passes through the 6600 interconnect cable and enters the monoblock X-ray source at J2 pins 4 and 5. The +24 volts from J2-4 is applied to the normally open contacts of the relay located within the monoblock X-ray source. The +24 volts from J2-5 goes to the coil of the internal relay and exits the monoblock X-ray source again at J2-6 and goes back through the 6600 interconnect cable to P2-6 of the 6600 Controller PCB (HV interlock*). Monitor the state of HV Interlock* on the 6600 Controller PCB at TP31. The HV interlock* signal at TP31 will stay at +24 volts for approximately 275 milliseconds before being pulled to zero volts by amplifier U29. During the 275 milliseconds that TP31 is held at +24 volts and during the boot process, the following things occur: · During the first 250 milliseconds the Window manager, U17, is loaded with data from serial prom U18 · When the data from the serial prom has been loaded into the window manager the micro controller U10 reset is released · During the last 25 milliseconds that TP31 is held at +24 volts the contents of the boot prom U6 are loaded into the micro controller U10 and the program begins to execute · The program then switches the HV interlock* signal low using U29 as a current sink to energize the internal relay in the monoblock X-ray source. The activation of the internal relay provides the power to the high voltage and filament circuits.


During Normal Operation During normal operation, if the monoblock X-ray source reports an error through the status port on the 6600 Controller PCB, the HV interlock* signal is switched to +24 volts shutting off +24 volt power to the high voltage and filament circuits in the monoblock X-ray source.

X-ray On Generate X-ray exposures from either the handswitch or footswitch. The handswitch and footswitch are each supplied with +5 volts (I_Source) and digital ground (X_Gnd) connections. The handswitch and footswitch each contain a double switch that provides +5 volts and digital ground signals back to the 6600 Controller PCB where they are optically coupled to the X-ray on circuit. Before the monoblock can produce X-rays the X-ray hardware circuit and software checks must be correct.

MINI6600TM Imaging System Service Manual - C-Arm Control X-ray Switch Monitoring The following X-ray on signal levels are present in the 6600 Controller PCB X-ray on circuit. Signal Name

X-rays Off

X-rays On

Signal Source

I_SOURCE (P10-1) X_NHA (P10-3) X_NHB (P10-6) X_NLA (P10-5) X_NLB (P10-8) TP26 SWITCH NH TP27 SWITCH NL TP30 X-RAY ON U28-12 U28-11

+5V +5V +5V 0V 0V +5V +5V +5V +5V +5V

+5V 0V +5V +5V 0V 0V 0V 0V 0V 0V

VCC Footswitch Handswitch Footswitch Handswitch Handswitch or Footswitch Handswitch or Footswitch Handswitch or Footswitch Handswitch or Footswitch µ Processor U10-25

TABLE 1 - X-ray Switch Logic Levels X-ray On Signal Make X-rays from either the handswitch or footswitch. When you press one of the X-ray switches the following things happen: •

• •

Both optical couplers U31 and U48 turn on causing the outputs at pins 6 and 7 of each device to go TTL low. Monitor the output of the optical coupler U31 at TP26 and monitor the output of the optical coupler U31 at TP27. The signal at TP26 (SWITCH NH) goes to the microprocessor U10 pin 8 where the software detects the activation of one of the X-ray switches. The signal at TP27 (SWITCH NL) goes to U16, where it is latched onto the microprocessor data bus allowing the software to detect the activation of one of the X-ray switches. The signal at TP27 (SWITCH NL) also goes to a delay circuit consisting of CR20, R93, C98 and U47.


•

• • •

•

•

The X-ray on signal from the delay circuit goes to U28-12 (NOR gate input). The microprocessor U10 pin 26 goes to U28-11 (NOR gate input). When the software detects that an X-ray switch activation, U28-11 goes TTL low. With both inputs of U28 (pins 11 and 12) TTL low, the output of U28 goes TTL high. The inverted output of U28 by U23 becomes the XRAY_ON_*. Monitor the XRAY_ON*_ signal at TP30 (XRAY ON). The XRAY_ON_* signal (TP30) exits the 6600 Controller PCB at P1-9 and continues through the 6600 interconnect cable to the monoblock X-ray source at J1-9. The XRAY_ON_* signal (TP30) also goes to amplifier U30, buffered, and leaves the 6600 Controller PCB at P8-12 to turn on the X-ray on indicator lamp above the left monitor. The XRAY_ON_* signal goes from P8-12 to P14-12 and into the Aux. Interface PCB at P10-18 in the Workstation electronics box. On the Aux. Interface PCB the XRAY_ON_* signal becomes X-RAY LAMP*. Monitor the X-Ray LAMP* at TP13. X-RAY LAMP* is inverted by U1 that drives the transistor switch Q1. Q1 provides a ground path to turn on LED array DS2 that is supplied with +5 volts from PS1. Releasing the X-ray switch before an adequate amount of exposure necessary to create a stable image by the workstation, the software on the 6600 Controller PCB will momentarily delay shutting off X-rays. This delay typically lasts for no more than 1 or 2 seconds. This will happen if you hold down the X-ray switch for less than 2 seconds. Releasing the X-ray switch after the system has produced a stable image will immediately terminate Xrays.

The delay circuit holds U28-12 TTL low while pressing the X-ray switch and for approximately 3 seconds after releasing the X-ray switch. The signal at U28-11, from the microprocessor, always goes TTL high to shut off Xrays before the delay circuit times out and goes TTL high after releasing the X-ray switch. If for some reason the software did not respond to the X-ray switch being released by placing a TTL high signal on U28-11, the delay circuit would terminate X-rays by switching U28-12 to TTL high.

MINI6600TM Imaging System Service Manual - C-Arm Control X-ray Inhibit Under certain conditions X-rays will terminate while in progress by the Workstation. The following discussions on the function of the X-ray inhibit signal will be easier to understand while referring to the following schematics. •

Mini6600 Interconnect Diagram Schematic Schematic #00-878780

•

Workstation Interconnect Diagram Schematic # 00-877970

•

Video Switching PCB Schematic # 00-872237

•

Image Processor PCB Schematic # 00-875952

•

Aux. Interface PCB Schematic # 00-876502

NOTE: Refer to Table 2 for signal logic levels while reading the following theory. Disable From Workstation GSP (Graphics Signal Processor) If there is no camera sync the Workstation GSP has the ability to disable X-rays. Camera video/sync enters the Workstation through the Aux. Interface PCB to TP10 of the Video Switching PCB. The camera video/sync signal travels through the Video Switching PCB MUX U13 pins 5 and 20 to sync stripper U6-2. The camera sync signal out of the sync stripper U6-1 becomes SEPINCSY and is applied to flip-flops U38 pins 9 and 5 and U28 pins 2 and 13 on the Video Switching PCB. The output of flip-flop U28-13, SYNCDET, will be a logic high if camera sync is present and a logic low if camera sync is not present.

MINI6600TM Imaging System Service Manual - C-Arm Control The Image Processor PCB GSP monitors the SYNCDET through PIO U3-18. The GSP will now enable or disable X-rays depending on the logic level of the SYNCDET signal. The GSP accomplishes this by generating a serial control word, VMDAT, out of the Image Processor PIO U3-14. The control word, VMDAT, is then applied to the serial to parallel shift register U33-14 (TP35) on the Video Switching PCB. Shift register U33-1 is the output bit that represents the SYNCDET logic level and is buffered through ‘AND’ gate U42 pins 4, 5 and 6 on the Video Switching PCB. The output of U42-6 becomes XRAYDIS and is applied to the Aux. Interface PCB ‘NAND’ gate U5-13 through inverter U1 pins 13 and 12. The other input to ‘NAND’ gate U5-12 is the output of the door interlock circuit (See topic DISABLE FROM WORKSTATION ROOM INTERFACE for additional information). The output of NAND gate U5-11 becomes the XRAYINH signal, measured on TP14 of the Aux. Interface PCB. XRAYINH enters the 6600 Controller PCB at P8-3 where is can be monitored at TP16. XRAYINH travels to the micro controller at U10-9. The software running the 6600 Controller PCB monitors the XRYDISBL. To enable Xrays XRYDISBL must be low. To disable X-rays XRYDISBL must be high.

Disable From Workstation Room Interface The Workstation will allow a room interface, such as a door interlock, to disable X-rays. The input from the room interface is applied to ‘NAND’ gate U5-12 through inverter U1 pins 9 and 8, U1 pins 5 and 6 and U1 pins 1 and 2 on the Aux. Interface PCB. Jumper E1 configures the inverter circuit U1 to accommodate either a low or a high input. The output of ‘NAND’ gate U5-11 becomes the XRAYINH signal as described previously. (See the topic DISABLE FROM WORKSTATION GSP for more information).

Disable From CCD Camera The absence of the CCD Camera’s composite video output will also disable X-rays. The composite video from the CCD Camera enters the 6600 Controller PCB at COAX Connector P4. You can monitor the composite video at TP28. The composite video travels to U39 pin 2 and exits U39 pin 1 as signal HDRV and pin 3 as VSYNC. Monitor the HDRV signal TP48. Monitor the VSYNC signal at TP49. From U39 pin1 the HDRV signal enters U17 pin 52 and VSYNC enters U17 pin 3. These two signals provide timing for the WIN_INTR signal. The WIN_INTR signal exits U17 pin 21. Monitor the WIN_INTR signal at TP3.


From U17 pin 21 the WIN_INTR signal travels to micro controller U10 pin 15. If the software running the 6600 Controller PCB detects a low WIN_INTR signal the XRAYINH signal goes high and disables X-rays. SIGNAL

XRAYINH — 6600 Controller PCB TP15 XRAYINH — Aux. Interface PCB TP14 XRAYDIS — Aux. Interface PCB U5-13 ROOM INTERFACE — Aux. Interface PCB U5-12 SYNCDET — Image Processor U3-18 WIN_INTR — 6600 Controller PCB TP3

TABLE 2 - Signal Logic Levels

X-RAY

X-RAY

ENABLED

DISABLED

Low Low High High High High

High High Low Low Low Low

MINI6600TM Imaging System Service Manual - C-Arm Control X-ray Status The monoblock X-ray source reports operational status and errors to the 6600 Controller PCB through the following lines in the X-RAY_STATUS lines listed in the following table. All states shown in table 3 reflect the working condition.

Signal Name

Test Point

X-Ray Off State

X-Ray On State

Comments

XRAY_READY*

TP10

LOW

LOW

Filament is on and X-ray capable.

XRAY_STATUS*

TP11

HIGH

LOW

Will go low when 30kVp or higher is present at the X-ray Tube.

XRAY_STANDBY*

TP12

HIGH or **LOW

HIGH

**Signal goes low after 5 min. of no activity to turn down filament heat.

XRAY_I_LIMIT*

TP13

1

1

HIGH

Commanded µA DRIVE voltage has exceeded internal limit of 150.8 µ A.

XRAY_OVER_V*

TP6

1

1

HIGH

Commanded KV DRIVE voltage has exceeded internal limit of 75.3 kV.

XRAY_OVER_I*

TP7

1

1

HIGH

Internal tube current in excess of 150.8 µ A. has been exceeded.

XRAY_HV_FAULT*

TP8

1

1

HIGH

X-ray tube arc has been detected.

HIGH HIGH HIGH HIGH

TABLE 3 - X-ray Status Logic Levels

MINI6600TM Imaging System Service Manual - C-Arm Control 1

If the following status lines are set LOW, reporting a problem, you will see the GENERATOR FAULT message that will break HV INTERLOCK. • • • •

XRAY_I_LIMIT* XRAY_OVER_V* XRAY_OVER_I* XRAY_HV_FAULT*

Error Messages The system contains software and circuits designed to monitor system functions and warn you of malfunctions. The right monitor displays error codes and other system messages in a status bar located on the bottom of the right screen. Displayed messages can appear at startup or during operation.

AEC_HDC_FAIL “Automatic Exposure Control High During Configuration Fail” indicates that the reset to the micro controller (U10) was released before the window manager (U17) had completed the data load from serial prom U18. The HDC line becomes low on the 6600 Controller PCB. Probable cause: •

Failure of the window manager U17.

CURRENT ON Detected tube current by the µA MONITOR A/D input without an X-ray switch being activated. HV INTERLOCK* (TP31) is set high to +24 volts breaking the interlock to the monoblock X-ray source. Press ALARM RESET to continue. Probable causes: • •

Monoblock X-ray source failure µA MONITOR circuit failure on the 6600 Controller PCB.


DOS ERROR A DOS error has occurred in the 386 motherboard operating system. This error causes the GSP software in the Workstation to stop running. The Workstation program exits to DOS, setting the X-ray Disable line high preventing X-rays.

FEATURE NOT INSTALLED You have attempted to select a feature not available on your system. This message will be accompanied by a “low tone” when you press the button.

EEPROM FAIL The EEPROM U8 detected a problem on the 6600 Controller PCB. The alarm on the 6600 Controller PCB sounds continuously instead of beeping while attempting X-ray’s. Probable cause: This error occurs when you select LOAD 6600 EEPROM in the service menu without being followed by selecting the GENERATOR CONFIGURATION, also in the service menu, and pressing ESC to return to workstation. FOOT SW STUCK •

The X-ray circuit has detected that a pressed switch during boot-up. The system will display the error and the alarm on the 6600 Controller PCB will sound until you press the ALARM RESET button. Probable cause: A stuck footswitch or handswitch button. FUNCTION NOT ALLOWED •

You have attempted to select a function not available on your system. You will hear a low beep with this message when you press the button.


GENERATOR FAULT The 6600 Controller PCB has received a fault from the monoblock X-ray source on one of the following fault lines: • • • •

XRAY_I_LIMIT* XRAY_OVER_V* XRAY_OVER_I* XRAY_HV_FAULT*

Press ALARM RESET to continue. See X-ray status for more information.

NO SETTLE One of four conditions listed below can cause the NO SETTLE error message. • • • •

HIGH CURRENT HIGH VOLTAGE LOW CURRENT LOW VOLTAGE

If within the first 750 milliseconds of the X-ray exposure the KV_MONITOR A/D input or the µA MONITOR A/D input did not go to within 10% of the specified values being requested by the software. Press ALARM RESET to continue. If the KV_MONITOR or the µA MONITOR does not go to within 20% of the specified values being requested in the first 750 milliseconds, you will notice one of the following errors displayed:

MINI6600TM Imaging System Service Manual - C-Arm Control HIGH CURRENT

The tube current being detected by the µA MONITOR A/D input is at least 20% higher than is being requested after the first 750 milliseconds of an X-ray exposure. Press ALARM RESET to continue. Probable cause: Faulty µA DRIVE circuit Faulty µA MONITOR circuit Filament failure in the monoblock X-ray source. This condition will be reported as a NO SETTLE error unless it is sensed 3 consecutive times by the software. • • •

HIGH VOLTAGE

The kilo-voltage being sensed by the KV MONITOR A/D input is at least 20% higher than is being requested after the first 750 milliseconds of an X-ray exposure. Press ALARM RESET to continue. Probable cause: Faulty KV DRIVE circuit Faulty KV MONITOR circuit Faulty monoblock X-ray source. This condition can be reported as a NO SETTLE error unless it is sensed 3 consecutive times by the software. • • •

LOW CURRENT The tube current being detected by the µA MONITOR A/D input is at least 20% lower than is being requested after the first 750 milliseconds of an X-ray exposure. Press ALARM RESET to continue. Probable cause: Faulty µA DRIVE circuit Faulty µA MONITOR circuit Faulty monoblock X-ray source. This condition can be reported as a NO SETTLE error unless it is sensed 3 consecutive times by the software. • • •


LOW VOLTAGE

The kilo-voltage being detected by the KV MONITOR A/D input is at least 20% lower than is being requested after the first 750 milliseconds of an X-ray exposure. Press ALARM RESET to continue. Probable cause: • • •

Faulty KV DRIVE circuit Faulty KV MONITOR circuit Faulty monoblock X-ray source.

This condition can be reported as a NO SETTLE error unless it is sensed 3 consecutive times by the software.

PS STANDBY This fault is displayed if the XRAY_STANDBY* line (TP12) is low when you request an X-ray and would indicate that the filament is not fully heated. Press ALARM RESET to continue. Probable causes: • •

More than 5 minutes have passed with no control panel or X-ray activity You requested X-rays within 250 milliseconds of the start of filament preheating.

VOLTAGE ON The KV MONITOR A/D input detected kilo-voltage from the monoblock X-ray source without being requested. Press ALARM RESET to continue. Probable cause: •

Faulty KV MONITOR circuit.


Workstation Control Lines The three signals described in this section: VIDSTAB*, STORE* and FLUORO* are control signals from the CArm to the Workstation. The 6600 system currently ignores the FLUORO* signal. The 6600 Controller PCB data bus generates all three signals through Latch U11. And routes them onto the Aux. Interface PCB through connector P10. All three signals exit the Aux. Interface PCB through Connector P14 to the Communications PCB Connector P3 and terminate at the inputs of Latch U14. The STORE* line is also routed from the Aux. Interface PCB, as the XRAYON line, through connector P9 to Video Switching PCB Connector J8. U42 inverts the line on the Video Switching PCB to become the XRAY_ON line to Image Processor PCB PIO #2 U3.

Video Stable VIDSTAB*: This control signal to the workstation tells software that video has stabilized and processing of the image can begin. Before generating this signal no image processing is allowed. For One-Shot, the VIDSTAB* indicates the start of averaging to the image. VIDSTAB* is TTL Hi while the exposure technique servo’s to get the proper WIN_AVG signal voltage. When WIN_AVG reaches the proper voltage, VIDSTAB* is set TTL Low.

Store STORE*: This signal notifies software that there is live video on the video input line from the camera and directs software to start acquiring the image. Terminating X-rays sets the STORE* line TTL Hi. Initiating X-rays sets the STORE* line TTL Low.

Fluoro FLUORO: The 6600 system does not implement this signal. It directs the system to go to Fluoro-Only mode, regardless of the present system operating mode.

A/D Input The micro controller U10 on the 6600 Controller PCB contains a 6 input analog to digital converter located at port 0. U10 uses a +5.00 volt reference voltage supplied by voltage reference VR1, voltage divider R75 and R78 and op amp U43. +5.00 volt reference enters U10 at pin 13.


KV Monitor KV Monitor leaves the X-ray source at P1-4 and goes through the 6600 Interconnect cable to the 6600 Controller PCB. KV Monitor enters the 6600 Controller PCB at P1-4 and sends it through a 2:1 voltage divider R51 and R47 and buffer amplifier U36. Measure the kV Monitor voltage at TP34. KV Monitor enters U10 at pin 6 (Analog to digital input 0).

µA Monitor Micro amp Monitor leaves the X-ray source at P1-5 and goes through the 6600 Interconnect cable to the 6600 Controller PCB. Micro amp Monitor enters the 6600 Controller PCB at P1-5 and sends it through a 2:1 voltage divider R49 and R50 and buffer amplifier U36. Measure the micro amp Monitor voltage at TP33. Micro amp Monitor enters U10 at pin 5 (Analog to digital input 1).

Camera Position A potentiometer located in the camera lens assembly senses the camera position. VR1, U43 and U38 on the 6600 Controller PCB provides the reference voltage to the camera position potentiometer. The reference voltage leaves the 6600 Controller PCB at P3-1 and goes through the 6600 Interconnect cable to P1-1 on the Camera Assembly. The reference voltage goes to one side of the potentiometer in the lens assembly. The other side of the potentiometer is connected to ground at the 6600 Controller PCB. The camera position voltage from the potentiometer wiper leaves the camera assembly on P1-2 and goes back through the 6600 Interconnect cable to P3-2 of the 6600 Controller PCB. U40 buffers the camera position voltage where it enters U10 at pin 7 (Analog to digital input 2). When requesting camera rotation or horizontal image reversal, the displayed camera position will appear on the left monitor for several seconds.

Peak Video Level The peak video level signal comes from the camera lens video signal. Camera lens video leaves the CCD camera at the W6 connection and exits the camera assembly at mini coax connector P3. The camera lens video signal goes through the 6600 Interconnect cable and enters the 6600 Controller PCB at coax connector P5.

MINI6600TM Imaging System Service Manual - C-Arm Control Monitor the camera lens video signal on the 6600 Controller PCB at TP29. The camera lens video signal runs through a DC restoration circuit (U45) to restore the DC content of the signal so that the peak video level information can be extracted. U44 amplifies the restored lens video signal. Monitor the restored video signal at TP45. U37 buffers the restored video signal. The restored video signal travels to the analog switch U42. It is switched on and off by the window manager U17-23 to create a sample window. The video signal passing through U42 goes to peak detector C71. The peak detector holds the peak video level that is buffered by U37 and produces a peak video level voltage. The peak video level signal enters U10 at pin 11 (Analog to digital input 4), and can be monitored at TP36. The peak detector is reset after each video field by the analog switch U42. U42 is switched on and off by the window manager U17 pin 16.

Average Video Level The average video level signal comes from the camera lens video signal. Camera lens video leaves the CCD camera at the W6 connection and exits the camera assembly at mini coax connector P3. The camera lens video signal goes through the 6600 Interconnect cable and enters the 6600 Controller PCB at coax connector P5. Monitor the camera lens video signal on the 6600 Controller PCB at TP29. The camera lens video signal runs through a DC restoration circuit (U45) to restore the DC content of the signal so that the average video information can be extracted. U44 amplifies the DC restored lens video. Monitor the restored video signal at TP45. The restored video signal goes to an analog switch U42 that is switched on and off by the window manager U17-23 to create a sample window. The video signal passing through U42 runs through a low pass filter R80 and C89 that produces an average video level voltage. The average video level, buffered by U44, enters U10 at pin 10 (Analog to digital input 5), and can be monitored at TP45.

D/A Output The 6600 Controller PCB contains a four channel digital to analog converter U19. U19 uses a -10.00 volt reference that supplies reference VR1, voltage divider R62 and R54 and op amp U41. Measure the -10.00 volt reference voltage at TP43. U19 uses data from EEPROM U8 to provide proper kV and µA drive voltages to the Xray source.

MINI6600TM Imaging System Service Manual - C-Arm Control KV Drive U19 channel A supplies U32 (current to voltage converter) the kV Drive voltage for the X-ray source. Monitor the kV Drive voltage at TP25. The scale factor for kV Drive at TP25 is 100 millivolts per 1 kV. The kV drive voltage exits the 6600 Controller PCB at P1-1 and goes through the 6600 Interconnect cable to J1-1 at the X-ray source.

µA Drive U19 channel B supplies U35 (current to voltage converter) the micro amp drive voltage for the X-ray source. Monitor the microamp drive voltage at TP15. The scale factor for micro amp drive at TP15 is 50 millivolts per 1 microamp. The microamp drive voltage exits the 6600 Controller PCB at P1-2 and goes through the 6600 Interconnect cable to J-12 at the X-ray source.

Status LED The status LED’s DS1 and DS2 are on the 6600 Controller PCB to provide I/O status information to aid service personnel in isolating problems in the MINI6600 system. DS1 and DS2 are located on the upper left-hand corner of the PCB just below the S1 diagnostic switch. Bit 0 through bit 15 information displayed on DS1 and DS2 is controlled by the switch setting of S1. The bottom 4 segments of DS2 indicate the presence of power supply voltages. In some S1 switch settings bit 0 through 7 and 8 through 15 will each represent 8 bits of diagnostic status information. In other switch settings’ bits 0 through 9 will represent 10 bits of status information. See Diagnostic Switch S1 for more information. DS1

0

DS2

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 -12V +12V +5V +24V

BITS

FIGURE 7 - Status LED’s DS1 and DS2

MINI6600TM Imaging System Service Manual - C-Arm Control Diagnostic Switch (S1) The Diagnostic Switch, S1, provides the various operating and diagnostic information displayed on the DS1 and DS2 LED’s, located on the 6600 Controller PCB. The S1 switch selects the different diagnostic display modes on DS1 and DS2. The switch positions are listed below. S1 Setting S4 S3 S2 S1

DS1 Data Bit 0-7

DS2 Data Bit 8-15

(Low Data)

DS1 and DS2 Bit 0-9

(High Data)

C C C C (0)

X-ray_Status P1 7-15

Keypad Scan P9 1-6

C C C O (1)

U10 u processor Port 0

U10 u processor Port 1

C C O C (2)

Control Panel LED’s P9

Cart P8 11, 4, 5, 6

C C O O (3)

U10 u processor HS0

Technique Table Index

C O C C (4)

KV Drive D/A Ch A

Kv Monitor A/D Ch 0

C O C O (5)

µA Drive D/A Ch B

µA Monitor A/D Ch 1

C O O C (6)

A/D Ch 2 Camera Position

C O O O (7)

A/D Ch 4 Window Peak AEC Window ON

O C C C (8)

A/D Ch 5 Window Avg. AEC Window ON

O C C O (9)

Video Level Status

O C O C (A) O C O O (B)

RXD Index In TXD Index In

RXD Index Out TXD Index Out

O O C C (C) O O C O (D)

Activity Timer TEC Mini C Error Code

TEC Delayed Error Code

O O O C (E) O O O O (F)

TEC Footswitch State Selected Bits 0-15

TABLE 4 S1 Diagnostics


DS1 bit 0 waiting for serial communication from Workstation bit 1 X-ray standby bit 2 X-ray ready bit 3 X-ray inhibit flag is set bit 4 X-ray inhibit state bit 5 X-ray inhibit bit set bit 6 Software footswitch state bit 7 Hardware footswitch state bit 8 X-ray on state bit 9 X-ray on status DS2 bit 10Video stable state bit 11 Serial data output buffer to Workstation bit 12 Serial data input buffer from Workstation bit 13 Error message current bit 14 Top control panel key pressed bit 15 Clock activity

OPEN

OFF S1

O

C

S2

O

C

S3

O

C

CLOSED S4

O

C

OPEN SWITCH = 0 CLOSED SWITCH = C

FIGURE 8 - S1 Options Switch, Setting F Shown


Audio Alarm An audio alarm resides on the inside of the EMI shield that covers the 6600 Controller PCB. The audio alarm is driven by U10 micro controller pin 28 (beep), that goes to driver chip U25 pin 15 and to inverter U23 then to U25 pin 10. The audio alarm signal exits U25 at pins 14 and 11 and exits the board at P12 pins 2 and 1 to the audio alarm.

Camera Rotation The camera rotation circuit is driven by U10 micro controller pins 35 (CAM_ROT) and 34 (CAM_DIR). CAM_ROT goes to U30 pin 9 to turn on and off the camera rotation motor. CAM_DIR goes to U30 pin 15 and to inverter U23 then to U30 pin 10 to provide motor direction control for the camera rotation motor. Drive signals (motor +) and (motor -) exit the 6600 Controller PCB at P3 pins 4 and 5 and go through the interconnect cable to P1 pins 5 and 4 on the camera assembly. Motor drive signals go from P1 pins 5 and 4 directly to the camera rotation motor.

AEC Control During X-rays in the Auto Mode, Automatic Exposure Control uses the Average Video Level signal to control the X-ray technique. At the beginning of exposures made in the Auto Mode, the software monitors the WIN_AVG signal. When the WIN_AVG signal reaches the proper voltage level the technique will stop changing. This will set the Image stable line low. The X-ray technique is increased or decreased as shown in the following tables.

MINI6600TM Imaging System Service Manual - C-Arm Control 98

90

80

70 UA l 60

50

40

30

19.6

20 40

50

kV

60

70

75

NORMAL AEC TABLE

FIGURE 9 - AEC Tables 98

90

80

70 UA l 60

50

40

30

19.6

20

40

50

kV

60

OSTEO AEC TABLE

70

75

MINI6600TM Imaging System Service Manual - C-Arm Control Slide Collimators The four inch slide collimator is a, manually operated, two position collimator. Either you are in the six inch field or the four inch field. Refer to FIGURE 10. To position the four inch collimator within the X-ray beam push in on the slide handle until the slide detent engages. When selecting the four inch field no image magnification occurs. When you pull out on the slide handle, until the detent engages, you have selected the six inch field. Refer to the Procedures Section for either collimator adjustments or removal. SLIDE COLLIMATOR SET SCREW

4" ORIFICE

4 INCH SLIDE

RETAINING SCREWS

SLIDE HANDLE POSITIONING DETENT DETENT SPRING

SLIDE STOP RETAINING PLATE SCREWS (2)

RETAINING PLATE

FIGURE 10 - SLIDE COLLIMATOR ASSEMBLY

FIGURE 11 - SLIDE COLLIMATOR

MINI6600TM Imaging System Service Manual - C-Arm Control The four-inch slide interrupts LED Switch 00-879399 generating the logic low signal Mode Sense. This signal travels to J1 pin 9 on the X-Ray Source, A21. It passes through the X-Ray source without interference and exits the X-Ray source at J2, pin 9. The Mode Sense signal then enters the Micro Controller A20 at J2, pin 9. The Mode Sense signal goes to a logic high on the Micro Controller PCB and exits as signal M2 at J15, pin 4. The M2 signal enters the II Power Supply A22 at CN1, pin 5 and activates the 4-inch mode. In addition, on the upper right corner of the left monitor “Norm” or “MAG” will display to indicate the II mode. Footswitch

Configure 6600 Right Footswitch Print Save

Auto L>R Swap on Save Yes No

Access the footswitch configurations through the Setup Options menu. Insert your OEC Service Disk (00-877444) and select the Access Level 2 (Service) option. Select the Footswitch/Autoswap Cfg option. When you press the footswitch to request a thermal print or to save an image you generate the high active signal X_NL_C. This signal travels to the Micro Controller PCB, A20 at J10, pin 7. The Micro Controller will either direct a save or thermal print operation depending upon the footswitch configuration. In addition, it will process an Auto L>R Swap if the footswitch configures to complete this operation. The video signal leaves the Micro Controller PCB at J8 in route to the thermal printer.

MINI6600TM Imaging System Service Manual - C-Arm Software

C-ARM SOFTWARE OVERVIEW The 6600 Controller is a single 80C196-based PCB located on the lower right hand side of the Workstation. The board communicates with the Workstation and controls various functions associated with the X-ray generator. These functions include: X-ray tones, error monitoring and alarms, technique control (both automatic and manual), camera rotation, and scanning of the generator control buttons and generator function LEDs. The Controller also stores the current default values. These control value variables include the 9.5/10 minute alarm enable, the tone enable, 60/50 Hz AEC window, and tone frequency.

LOAD 6600 EEPROM The EEPROM (U8) contains default and custom-selected parameters for AEC tables, timer, alarm and tone information necessary for configuring the system on each boot-up. If you replace the EEPROM on the 6600 Controller PCB or you upgrade the software, you then must load it from a file on the system hard drive. The EEPROM is checked against a calculated checksum for integrity by software at each successive boot-up. To load the EEPROM, use the OEC Service Disk, and press the SETUP OPTIONS key on the workstation keyboard, then use the cursor control keys to highlight Access Level 2 (Service ), and press ENTER. Select Load 6600 EEPROM . When you load the EEPROM, you must access the menu shown in the following section (Generator Configuration), as described, to set the configuration and prevent display of an EEPROM error during the first X-ray exposure.

MINI6600TM Imaging System Service Manual - C-Arm Software Generator Configuration Using the OEC Service Disk, press the SETUP OPTIONS key on the workstation keyboard, use the cursor control keys to highlight Access Level 2 (Service), and press ENTER. Select Generator Configuration for the following menu: 6600 GENERATOR CONFIGURATION DISABLE 10 minute fluoro alarm. DISABLE tone during shot. ENABLE 50Hz ABS Window. Setup alarm frequency (700 - 1600 Hz). ALARM FREQ= 700 Hz ChkSum: 8c 8c 8c ChkPts: a55a 5aa5 Camera Rotation MIN= 115 POS= 0 MAX= 909 Debug: Debug:

264 2e1 6485 84d4 9048 a263 220 4120 5a4 8880 6a40 a040 a48 8039 800 ff7f

Enter Command Letter: Return to Workstation.

NOTE: Items a, b, and c on the Setup menu are toggle functions. If DISABLE is displayed on the menu, selection of the item DISABLES that function. Selection of item brings up the following tone selection menu: 6600 TONE FREQUENCY MENU: 1. 700Hz 6. 1200Hz

2. 800Hz 7. 1300Hz

3. 900Hz 8. 1400Hz

PRESS TO RETURN TO MAIN MENU

4. 1000Hz 9. 1500Hz

5. 1100Hz a. 1600Hz

MINI6600TM Imaging System Service Manual - C-Arm Software NOTE: Selection of a number from the above menu causes a tone to sound. If you press other numbers from the menu in succession, the tone will vary in frequency with each selection. Press ENTER when you locate the desired tone. The frequency of the selected tone is displayed under item d of the main menu. ChkSum:

These three values are various calculations of the EEPROM checksum and are checked by the system while X-rays are being generated.

ChkPts:

Check points are unique values written at the start and end of the AEC tables. Software uses these values as well as the checksum to ensure that the AEC tables loaded correctly. In addition, these values are checked periodically to determine whether the AEC tables have been changed.

Camera Rotation: Debug:

Camera rotation numbers displayed below item of the main menu are read from an internal pot and correspond to degrees of rotation by the camera. This data reflects the action of the servo and is not for field service use.

Startup And Software Boot The MINI6600 system performs tests on system integrity during boot-up and also during normal execution of the software. Perform the tests as detailed below:

Power ON Self-Test At boot-up, the processor stays in reset until the power supplies stabilize, the Window Manager initializes and then the processor reset releases and the software loads from the boot PROM. At this time, the following integrity checks are executed: 1.

Processor and memory integrity are checked through the verification and execution of key interrupt service routines and the main loop, coupled with the triggering of the watchdog circuit.

MINI6600TM Imaging System Service Manual - C-Arm Software

2.

Proper loading of the AEC circuit is checked by the code before the AEC Window programming. Loading problems will result in an alarm and error display.

3.

Check footswitch to ensure that it remains opened during boot-up. Incorrect position of the footswitch will result in an alarm and error display.

4.

The integrity of the EEPROM, that holds the technique table, is checked by Checksum. If an error is detected, an alarm will sound and an error message will be displayed and X-rays will be prevented.

Normal Operation 1.

Status of the monoblock X-ray source is constantly monitored. An error condition develops if X-rays should be on or off and will produce an alarm and error display.

2.

Integrity of the EEPROM that holds the technique table is checked for checksum and position in memory each time you request X-rays. If the EEPROM contents are not found intact, X-rays are inhibited and an alarm and error message is displayed.

MINI6600TM Imaging System Service Manual - C-Arm Imaging System

C-ARM IMAGING SYSTEM OVERVIEW The information provided in this section is easier to understand when referencing schematics from the schematic manual. Use the correct interconnect diagrams and circuit board schematics for your system indicated below. •

6600 Interconnect Diagram Schematic # 00-878780

•

6600 Controller PCB Schematic # 00-878565

The following integrated OEM components form the video chain that provides a video signal for processing and a video level signal for control: • • • • •

X-ray Source Image Intensifier Image Intensifier Power Supply Lens Assembly CCD Camera

#00-900981 #00-900976 #00-900988 #00-900982 #00-900983

MINI6600TM Imaging System Service Manual - C-Arm Imaging System X-RAY SOURCE The X-ray source is a monoblock design that combines the X-ray generator with the X-ray tube within the same housing. Replace the monoblock assembly as a unit, although the X-ray tube has a separate OEC part number #00-901005.

Monoblock Specifications • Input Power:

• • • • • • • • •

Primary Power: 24 VDC, 2 amps, ± 12 VDC, 250 mA Control and Filament Power: 24 VDC, 500 mA Output High Voltage, Anode-Cathode: 40 KVpCT (±20 kVp) to 75 KVpCT ( ±37.5 kVp) Output Current: 20 to 150 µA DC Duty Cycle: 4 hours maximum at 75 kVp and 150 µA Line Regulation (kVp): ± 0.1% for line changes of 23.5 to 24.5 VDC Line Regulation (emission current): ± 0.5% for line changes of 23.5 to 24.5 VDC Regulation (KVp): 0.1% for load changes of 20 to 150 µA DC Regulation (emission current): ± 0.5% for kV changes from 40 kVp to 75 kVp Ripple: 1% RMS measured at 75 kVp and 150 µA DC Temperature Stability: 0.01%/ °C over the temperature range of 10 °C to 35 °C Set-ability: ± 0.5%

MINI6600TM Imaging System Service Manual - C-Arm Imaging System Safety, Protective and Interlock Features: 24 VDC on/off relay ± 15 VDC/+24 VDC polyswitches by Dynarad in LVLE circuits as required Filament current limit: 160µA kVp over-voltage indication at 80 kVp Emission current fault kVp reference voltage limiting, adjustable, 70 to 78 kVp Emission current reference voltage limiting, adjustable, 100 to 160 µA •

X-Ray Tube Specifications • • • • • • • •

Cathode: Tungsten Filament, line focus Effective focal spot: 25 mm projected square Target angle (deg.): 12 ° (Four inch systems) Target angle (deg): 13.5 ° (Six inch systems) Max. tube voltage (kV): 80 kVp Tube current (mA): 2.0 mA continuous Max. applicable voltage (kV): 80 kVp/90 kVp inverse Anode heat characteristics: Max. heat storage capacity: 7,000 H.U. (4,970 Joules) Max. anode cooling rate 3,000 H.U. (2,130 Joules)

•

Filament rating, continuous: Voltage Max.: 1.57 volts Current Max.: 2.28 amps

•

Inherent filtration/window material: 0.2 mm aluminum

MINI6600TM Imaging System Service Manual - C-Arm Imaging System DC Power, J2 J2 is a 9 pin subminiature D connector on the X-ray source assembly. DC power comes from P2 on the 6600 Controller PCB. Capacitor networks and chokes FL3 through FL6 located on the 6600 Controller PCB condition the DC power lines. Pin #

Function

1 2 3 4 5 6 7 8 9

+ 12 VDC ± 12 VDC Return - 12 VDC + 24 VDC + 24 VDC HV Interlock + 24 VDC Return + 24 VDC Return Spare


X-ray Source Control, J3 J3 is a 15 pin subminiature D connector on the X-ray source assembly. The signals on J3 connect to P1 on the 6600 Controller PCB. The signal functions are given below: Pin #

Function

Direction

1 2 3 4 5 6 7* 8 9 10 11 12 13 14 15

kVp control signal, 10 kV/volt, 40-75 kVp Microamp control signal, 20 microamps/volt 40-150 microamps Signal return for pins 1 and 2 kVp monitor signal, 10 KV/volt ± 1% Microamp monitor Signal, 10 microamps/volt ± 1% Signal return for pins 4 & 5 Ready for x-ray x-ray On (Status) x-ray On (Command) Filament standby Filament current limit kVp overvoltage Emission overcurrent H.V. fault (arc detect) TTL return for signals 7 through 14

Input Input Input Output Output Output Output Output Input Output, TTL Output Output Output Output Output

* Signals on pin 7 through 14 are active low.


Turn-On Sequence The following sequence of actions determine the X-ray Source status: 1.

Aux. DC Power Supplies ( ± 12 VDC, + 24 VDC) are turned on

2.

Primary +24 VDC is turned on

3.

Filament is on, with reduced power, whenever the AC input line is energized

4.

Turn on X-ray (for first exposure). Initially it has a 250 ms rise time

5.

Filament stays in full power state for 5 minutes after initial X-ray

6.

Subsequent “X-ray On” will have a 10 ms rise time if initiated during the filament’s 5-minute full-power period

7.

In the event of a no “X-ray On” condition during the 5 minute period the filament returns to standby.

MINI6600TM Imaging System Service Manual - C-Arm Imaging System I.I POWER SUPPLY .

The I.I. power supply for either the 4-inch I.I. or the 6-inch I.I. attaches to the monoblock assembly. The I.I. power supply converts the +24 VDC it received from the 6600 Controller PCB to, approximately, the following voltages to operate the image intensifier tube. The 4-inch and the 6-inch I.I.’s use identical power supplies. Toshiba adjusts the power supplies at their factory. Symbol

Applied to:

Voltage

A G2 G1 PC

Anode voltage G2 electrode voltage G1 electrode voltage Photocathode

25 kV 1.3 to 3.5 kV 550 V 0V

Dual Mode I.I. Electrical Connections: The X-ray image intensifier operates with 24 vdc input voltage applied to the high voltage power supply. Wiring and connections are shown:


The following wire color code’s apply to the +24 ± 1 vdc power supply: White: connects to the +24 vdc line. Black: connects to the +24 vdc return line (0 vdc) and must be connected to earth ground. Dual mode operation select: N (6" mode)..........blue, yellow and red open M2 (4" mode).......yellow shorted to red, blue open.

Output voltages of the high voltage power supply: ANODE VOLTAGE G3 ELECTRODE VOLTAGE G2 ELECTRODE VOLTAGE G1 ELECTRODE VOLTAGE PHOTOCATHODE VOLTAGE

SYMBOL A G3 G2 G1 PC

N MODE 25kV* 2.3 TO 4.0 KV* 800 TO 1200V* 150 TO 280V* 0V

* These voltages are factory adjusted to the optimum voltages.

M2 MODE 8.5 TO 11.5KV* 400 TO 700V* 150 TO 280V*


MINI6600TM Imaging System Service Manual - C-Arm Imaging System LENS ASSEMBLY The lens assembly consists of an integrated camera lens, camera rotation motor, and rotation sensing potentiometer. The CCD camera mounts to the lens assembly and rotated by the motor. The following signals connect between the lens assembly and P3 of the Microcontroller PCB: Signal

Color

P1-pin

VREF POS AGND MOTORMOTOR+

BLK WHT RED ORANGE BROWN

1 2 3 4 5

VREF and POS return a voltage proportional to the camera angular position. MOTOR+ and MOTOR- drive the camera rotation motor. Cable assembly 878575 gathers the connections from the lens assembly and the +12VDC camera power supply to a 9-pin D-connector (P1).

CCD CAMERA The camera is a Cohu board-level CCD camera that attaches to the lens assembly. The lens assembly provides the optics and camera rotation function for the camera. The +12 VDC feeds to the camera through P1 pin 6 (+12V) and pin 7 (RTN). Connector P1 gathers signals and power lines from the Lens Assembly and Camera and connects them via the Interconnect Cable to P3 (Power/Control) on the Microcontroller PCB. A crystal within the camera provides the video sync. For operating details on the camera rotation, camera position sense, and peak/average video level sense, refer to the C-Arm Control section.

MINI6600TM Imaging System Service Manual - C-Arm Imaging System VIDEO PATH FIGURE 1 shows the video path. Camera video leaves the CCD camera at W4 (W3 is GND) through coax connector P2 where it enters the Interconnect Cable (900992). Video connects to the 6600 Controller PCB at P4 and enters the board as COMP_VID. (See schematic 878565). Check the video on the Controller PCB at TP28.

CCD CAMERA

W4

W3

Video leaves the Controller PCB at P7 after being summed with the window outline. The window outline is visible when U17 (WINMGR) enables the U17-window through U42. After leaving the Controller PCB, the video signal passes through coax connector J13 and enters the Workstation Aux. Interface PCB at J10.

VIDEO LEVEL The video level signal leaves the camera at W5 where it enters the interconnect cable on coax connector P3. This signal then enters the Controller PCB at P5 as CAM_VID. (See schematic 878565).

00-878893 P/O CAMERA CABLE ASSY. P2 00-900992 P/O MINI C INTERCONNECT CABLE * = COAX CONNECTOR P4*

00-878567 6600 CONTROLLER PCB

P7* 00-878572 P/O A20 TO J13 CABLE ASSY. J13*

FIGURE 1 - The Video Path

MINI C-ARM WORKSTATION ELECTRONIC BOX

MINI6600TM Imaging System Service Manual - Workstation Control

WORKSTATION CONTROL OVERVIEW This section describes the circuit boards and components controlling the MINI6600. The Control Panel Processor PCB serves as an input/display interface for the control panel used by the system operator. When a switch closes at the control panel, the Control Panel Processor encodes it and the Control Panel Processor sends this information to the 6600 Controller PCB, A28. The 6600 Controller responds to this by sending the data back to the Control Panel Processor to illuminate the associated LED. The 6600 Controller PCB also communicates over a digital bus to the Aux. Interface PCB. The information given in this section is easier to understand while referring to the following schematics. Component layout drawings for all PCBs are in t he Appendix . • C-Arm Interconnect Diagram

Schematic #00-878780 • Control Panel Processor PCB

Schematic #00-876611 • 6600 Controller PCB

Schematic #00-878565 • 386 Motherboard

Assembly #00-900658 • Communications PCB

Schematic #00-872125

MINI6600TM Imaging System Service Manual - Workstation Control The Control Panel Processor PCB, QWERTY keyboard, and Control Panel are within the Monitor Assembly as shown below. Refer to the System Overview section for cover removal information.

FIGURE 1 - Monitor, Control Panel and QWERTY Keyboard Assemblies

CAUTION: When replacing the EMI/RFI covers over the Control Panel Processor PCB, do not damage the metal gasket material around the edge of the PCB box. Replace the gasket material if damaged to assure compliance with EMI/RFI regulations. When replacing a cover, do the following: 1. Start a corner of the cover over the box 2. Push the cover diagonally from the corner against the spring tension of the gasket material. 3. Make sure the edges of the cover are not pushing on the mounting edge of the gasket material and gently push the cover down over the box.

EMI/RFI COVERS


CONTROL PANEL Software on the Control Panel Processor PCB continuously scans the MINI6600 control panel keypads to determine if any keys have been pressed. Each key is identified by a row number and a column number and is encoded as a hex value. When you press a key the hex value travels to the Communications PCB and 386 Motherboard. The English version is shown below. The International version of this control panel is shown in FIGURE 3 for reference. The Manual/Auto Brightness and Contrast buttons, Negate, VCR Record/ Play and Save buttons, indicated by shading, refer to the Workstation controls and are read by the Control Panel Processor PCB. The remaining buttons refer to C-Arm controls and are read by the 6600 Controller PCB.

FIGURE 2 - Control Panel, Domestic


FIGURE 3 - Control Panel, International

MINI6600TM Imaging System Service Manual - Workstation Control Front Panel The Front Panel Switches control the following functions: • • • • •

Averaging Fluoro One-shot Enhanced One-shot L->R.

FLUORO

ONE-SHOT

ENHANCED

AVERAGING

L<->R

FIGURE 4 - Workstation Front Panel This panel cannot be field repaired. Replace if problems arise. Send the defective panel to the factory for repair. Refer to the Illustrated Parts section for part numbers. Diagnostics within the system software allow the testing of the front panel controls.

Keyboard The QWERTY Keyboard is similar to the keyboard used on a computer, but contains specially labeled keys that control system functions. The alphan umeric keys are used for patient annotation and system control. A drawing of the QWERTY keyboard is in the System Overview section. This keyboard is not field repairable. Replace if problems arise. Send the defective keyboard to the factory for repair. Refer to the Illustrated Parts section for part numbers.


PATIENT (ANNOTATE)

HELP

! 1

@ 2

# 3 W

Q

tab

Z

Shift Alt

IMAGE DIR

$ 4 E

S

A

Ctrl

DISK VIEW

% 5 R

X

^ 6

C

& 7 Y

T F

D

G

V

X-RAY SUMMARY

MARKERS

* 8

H

B

( 9

K

J N

) 0

M

< ,

+

-

=

> .

SETUP OPTIONS

Backspace

Enter

} ]

{ [ : ;

L

CUSTOMIZE

_

P

O

I

U

TEST PATTERN

SPECIAL APPS

ESC Home

PgUp

End

PgDn

" ' ? /

Shift | \

~ `

FIGURE 5 - QWERTY Keyboard

Del

MINI6600TM Imaging System Service Manual - Workstation Control Control Panel Processor PCB NOTE : Refer to schematic # 00-876611. Microprocessor U5 is an 80C196KC microcontroller running at 12 MHz using crystal oscillator Y1. DS1 indicates that the EPROM code is being executed by blinking at two different rates: 200ms if waiting for communications to be established, and 530ms after communication has been established. U24 and the associated circuits create an external watchdog circuit that must see a falling edge every 150 ms or less. If the falling edge is not detected at pin 7, U24 will time out and generate a reset to the microcontroller and PAL U4. The Reset* signal goes low for 250 ms to generate a reset. U24 also monitors the power supply voltage. It will hold the RESET output pin low whenever VCC is below 4.65 volts (typically). LS1 is a tone generator driven by U13 to indicate when X-rays are being produced and to indicate other key closures. E1 - configuration jumper is not currently used.

Memory and Addressing When microprocessor U5 boots, it reads and executes code contained in boot EPROM U10. Port 3 of microprocessor U5 is a multiplexed address/data bus. The address is driven on the bus on the rising edge of ALE (address latch enable, U5-62). U2 latches the low address byte on the falling edge of ALE. Port 4 exists for wide bus address decoding by connecting U5-64 to U4-15 (Wide Bus Sel.). U4 is used for other chip select signals for address decoding.


Controls and Display Interface U2 is the keyboard-input latch. U15 is the keyboard output latch. These devices accomplish the row/column decoding for key closure detection. U12, U16, U17 and U19 are octal latches used to sink the LED currents. Writing a “0” to the appropriate bit illuminates an LED. P4, P5 and P6 connect to the left and right control panels respectively for the left and right keypad matrices, and LEDs.

MINI6600TM Imaging System Service Manual - Workstation Control Electronics Box The electronics box is the housing for the 386 System Motherboard and most of the other system circuit boards. Two fans that aid in air circulation mount to the bracket under the bottom of the box. Doors in the rear and side of the box provide service access to the system electronics. Rotate the 1/4-turn fasteners on each door and swing the door outward to open. Refer to the Illustrated Parts section of this manual for component placement diagrams. The elapsed time indicator mounts on either the top door or side door of the electronics box.

J18 FROM TB2

J12 LEFT MONITOR J13 CAMERA VIDEO J14 FROM LEMO CONNECTOR

NOTE : Before performing any adjustments or replacements, OEC Field Service personnel and Dealers are required to confirm that the elapsed time meter is operational and enter the elapsed time on the Field Service Report. It is important to report this time on each FSR.

FIGURE 6 - Electronics Box Cable Connectors on Lower Left Side

Cabling Remove the cables plugged into the electronics box if th e box is removed from the chassis frame. Cables are attached at the top rear and front lower left side (se e FIGURE 7 and 8).


P7 RIGHT MONITOR VIDEO

P10 EXTERNAL VCR REMOTE CONTROL P2 VIDEO OUT TO

P8 LEFT MONITOR VIDEO

INTERNAL VCR P1 VIDEO IN TO INTERNAL VCR

P9 SYSTEM INTERFACE CONNECTOR

FIGURE 7 - Electronics box Top Cable Connectors

MINI6600TM Imaging System Service Manual - Workstation Control Mounting The electronics box mounts to the chassis frame. Two torx-head screws penetrate through the back wall of the box and two penetrate through the base adjacent to the large access door. Refer to th e Illustrated Parts section of this manual for component placement details.

FIGURE 8 - Electronics box

MINI6600TM Imaging System Service Manual - Workstation Control Auxiliary Interface PCB NOTE : Refer to schematic #00-876502. The Aux. Interface PCB is a primary connection and distribution point for signals. The connector side of the circuit board provides external connection points to the rear panel.

Auxiliary Interface Connectors Conn. P1 P2 P3 P4 P5 P6 P7 P8 P9 P10 P11 P12 P13 P14 P15 P16

Signal(s) Camera Video Output to J6 on Video Switching PCB, from P10 (Aux. Int.), from C-Arm not used Parallel Printer Interface from Communications PCB (P4), to P18 (Aux. Interface PCB) not used COM 2 Communications Port on Rear Panel, from P13 (Aux. Interface PCB), from Communications PCB (P5) Room Interface Connection on Rear Panel VCR Serial Interface (optional) To X-ray On LED array on top of Workstation via J9/P9 and J11/P11 Connects to J8 on Video Switching PCB, interface for “XRAYDIS1*” and “STORE*” signals Connecting point for interconnect cable (signals) from C-Arm DC Power for Aux. Interface PCB from DC Power Distribution PCB Connection to Workstation Control Panel Processor PCB Connects to P5 on Communications PCB, for COM 1, COM 2, and drive signals for diagnostic LEDs (U3 and U4) on Aux. Interface PCB Connects to P3 on Communications PCB, for VCR controls, Serial Communications, other discrete signals VCR control signals, connects to internal VCR VCR control signals, connects to Rear Panel for external VCR

MINI6600TM Imaging System Service Manual - Workstation Control P17 P18 P19 P20 P21

COM 1 Communications Port on Rear Panel, from P13 (Aux. Interface PCB), from Communi cations PCB (P5) Parallel printer connection on Rear Panel, to P3 (Aux. Interface PCB), to Communications (P4) Video to/from Video Switching PCB for external VCR (VCR 2) Video from external VCR (VCR 2) to Video Switching PCB via P19 (Aux. Interface PCB) Video to external VCR (VCR 2) from Video Switching PCB via P19 (Aux. Interface PCB)

Room Interface Relays, K1 - K4 Relays’ K1-K4 provide the interface for the “X-ray On Light” and “Room In Use Light”. Call the OEC Tech Support office for more information.

X-ray on LED Array Driver The LED array on top of the Workstation illuminates when X-rays are being produced. The X-RAY LAMP signal from the Power/Motor Relay PCB on the C-Arm travels to the Aux. Interface PCB via the interconnect cable. The X-RAY LAMP signal (active Low) enters inverter U1 pin 3 on the Aux. Interface PCB. The output at U1 pin 4 (active HI) turns on Q1 and provides a return path for the LED array current. The array is powered by +5Vand is jumpered through E3 pins 2 and 3.

WARNING: Damage to the LED array will occur if E3 pins 1 to 2 are jumpered together. Boot and Diagnostic LEDs LED displays U3 (MSB) and U4 (LSB) provide the boot and diagnostic codes from the 386 Motherboard on the Workstation. They are driven from the Motherboard via the Communications PCB. Refer to the Workstation Software section for a listing of these codes.

MINI6600TM Imaging System Service Manual - Workstation Control X-ray Disable Circuit U1, U5, and jumper E1 on the Aux. Interface PCB are used in the X-ray disable circuit. Refer to the C-Arm Control section for further information.

MINI6600TM Imaging System Service Manual - Workstation Control Communications PCB NOTE : Refer to schematic #00-872125. The Communications PCB provides serial and parallel communications capability for the Motherboard with external devices, such as a printer. The Communications PCB handles the internal system communications occurring between the Control Panel Processor PCB and the C-Arm. The circuit board plugs directly into the Motherboard.

Serial Communications The AT Communications PCB handles all of the serial communications for the Motherboard to the Workstation Control Panel Processor PCB and the C-Arm.

Motherboard to Control Panel Processor DUART U27 on the Communications PCB receives signals from the 386 Motherboard via the data bus. U27 converts this information to RS232 serial data. The serial data then passes through the Aux. Interface PCB, through RS232 transceiver U7 on the Control Panel Processor and to microcontroller U5. Microcontroller U5 on the Control Panel Processor PCB communicates over the same path to the Motherboard. UART U26 on the Motherboard handles discrete signals for the room interface relays on the Aux. Interface PCB if operational.

386 Motherboard to C-Arm Communication between the C-Arm and Workstation is established during the boot process. During normal operation, the 386 Motherboard sends information such as: • Shot log file information from the C-Arm to the Workstation • Commands such as L>R, and SAVE from the Control Panel to the Workstation.

MINI6600TM Imaging System Service Manual - Workstation Control The TXD and RTS signals from Port B of the serial communications controller U39 on the Microcontroller PCB are sent to the Workstation 386 Motherboard. They pass through RS232 driver/receiver U52 on the Microcontroller PCB and then pass through the Mainframe Motherboard and enter the Aux. Interface PCB in the Workstation. They pass through the Aux. Interface PCB to the AT Communications PCB where they are inverted by U15 and enter DUART U27. U27 interfaces the signals to the data bus of the 386 Motherboard. The 386 Motherboard communicates over the data bus to DUART U27 on the Communications PCB. TXDA (pin 30) and RTS (pin 29) leave DUART U27, pass through RS232 line driver U16 and leave the Communications PCB at P3. They then pass through the Aux. Interface PCB, and enter the C-Arm at J1 on the Power Panel.

VCR Controls Control signals for the VCRs interface to the 386 Motherboard via the Communications PCB at P3.

Parallel Printer Interface The port for a parallel printer interfaces through the Communications PCB at connector P4.

COM1 and COM2 Ports COM1 and COM2 communication ports are currently not used on the Mini6600 system.

Option Prom Option PROM U25 on the Communications PCB is accessed by the 386 Motherboard during the boot process for information such as: • CGA graphics driver software • CMOS setup • OEC software signature stamp, if a diskette is found in the 3 1/2-inch floppy drive.

MINI6600TM Imaging System Service Manual - Workstation Control Clock Oscillator Y1 and counter U36 provide clock signals for DUARTS U26 and U27 (3.6864 MHz), UARTS U22 and U20 (1.8432 MHz), and the boot and diagnostic LEDs (230.4 kHz) on the Aux. Interface PCB.

Jumpers E1, E2, E3 Jumpers E1, E2, and E3 on the Communications PCB configure the system for the IDE (Integrated Device Electronics) hard drive disk installed in the Workstation.

MINI6600TM Imaging System Service Manual - Workstation Control 386 Motherboard The System 386 Motherboard contains the main system microprocessor. It communicates with the following circuit boards: • 6600 Controller PCB • Communications PCB.

These interface boards plug directly into the connectors on the Motherboard.

386SX Motherboard Jumpers Settings Jumper

Position

Description

W1 W2 W3 W5 W4 W6 W7 W8 W9 W10 W11

1-2 1-2 1-2 1-2 2-3 1-2 OFF 1-2 1-2 2-3 1-2

COM 2/4 IRQ COM 1/3 IRQ FLASH LPT IRQ COLOR/MONO MICROSOFT MOUSE INT CMOS RESET FREQ SEL FREQ SEL CMOS BATTERY SEL (EXTERNAL)

NOTE: The CMOS Battery Jumper, W11, must be in the 1-2 position for the 6600, due to use of an external battery (P/N 74-122854-00, 5.5V Alkaline). The external battery is above the System 386 Motherboard and secured to the Electronics box with double-sided tape.

MINI6600TM Imaging System Service Manual - Workstation Software

Workstation Software OVERVIEW Software files for the Workstation reside on a hard disk located within the electronics box in the Workstation. This section discusses the following Workstation software topics: • Start-up and Software Boot • Boot and Error Codes • Diagnostics

START-UP AND SOFTWARE BOOT Power-ON Self Test When you apply power to the system, the system 386 Motherboard performs Power-On Self Tests (POST). If the Post’s are successful, the 386 Motherboard continues through the boot process. LED readouts on the rear panel of the Workstation indicate the status of the boot process. Details of the Boo t Sequence and Error Codes appear in this section. If the boot sequence stops, note the readout and refer to th e boot sequence and error code’s section for references to possible reasons and locations of the fault. Text similar to the following example displays on the left monitor during boot-up: OEC MEDICAL SYSTEMS OPTION ROM P/N 0-877002-02 COPYRIGHT (C) 1993, 1994, 1995 OEC MEDICAL SYSTEMS (c) American Megatrends, Inc.

MINI6600TM Imaging System Service Manual - Workstation Software Workstation Boot Sequence The following procedure describes the Workstation boot sequence that occurs at Workstation power up: 1.

The 386 Processor resets and loads AMI BIOSTM software. BIOSTM identifies any Option ROMs and finds the OEC Option PROM on the AT Communications PCB. The date and version of the Option PROM are displayed briefly on the left monitor

2.

The CGA video drivers, loaded from the Option PROM and the floppy drive, are checked (for the presence of a system boot disk) by the Option PROM

3.

The AMI BIOSTM copyright information is displayed briefly on the monitor. (AMI BIOSTM controls information that tells the CPU how and when to access the disk, read the keyboard, load video drivers and run video screens, etc.)

4.

Workstation performs Power On Self Tests (POST). If all internal motherboard diagnostics pass, the boot sequence continues. If failures occur, the boot sequence stops at the point of failure and an error message appears on the monitor

5.

The AT Communications PCB initializes the Image Processor

6.

The Image Processor’s GSP (Graphics System Processor) software loads. Both monitors go blank at this point

7.

Front panel communications are enabled. An audible tone emminates from speaker SP1 when this phase of boot up is complete

8.

The Workstation software begins running. The initial Workstation serial number screen displays on the right monitor when the boot up process is complete.

MINI6600TM Imaging System Service Manual - Workstation Software BOOT AND ERROR CODES This section contains a listing of the checkpoint codes written to the two character display on the Mini 6600 Workstation’s rear panel. During the boot process, the alphanumeric LEDs on the rear panel displays two digit codes that indicate the status of the boot sequence. Since these codes do not normally indicate an error, they are referred to as progress codes. Typically, these codes give way to an E0 code once normal program operation has begun. If the program does not complete the boot process, a code will remain on the LED display, indicating the point where an error occurred. A description of these codes follows.

AMI BIOS Post Code Table These alpha-numeric codes are displayed by the LEDs on the Auxiliary Interface PCB during boot-up. 01 Processor register test about to start. 02 NMI disabled. 03 Power-on delay completed. 04 Any initialization before keyboard BAT is completed. 05 Soft reset / power-on determined. 06 ROM is enabled. 07 ROM BIOS checksum passed, keyboard controller input buffer free. 08 BAT command to keyboard controller is issued. 09 Keyboard controller BAT command verified. 0A Keyboard command byte code is issued. 0B Keyboard controller command byte is written. 0C Pin-23, 24 of keyboard controller is blocked / unblocked. 0D NOP command processing is done.

MINI6600TM Imaging System Service Manual - Workstation Software 0E CMOS shutdown register R/W test passed. 0F CMOS calculation is done, DIAG byte written. 10 CMOS initialization (if any) done. 11 CMOS status register initialized. 12 DMA controller #1, #2 interrupt controller #1, #2 disabled. 13 Video is disabled and port-B is initialized. 14 Chipset initialization / auto memory detection over. 15 CH-2 timer test halfway. 16 CH-2 timer test over. 17 CH-1 timer test over. 18 CH-0 timer test over. 19 Memory refresh started. 1A Memory refresh line is toggling. 1B Memory refresh period 30 micro second test completed. 20 Base 64 KB memory test started. 21 Address line test passed. 22 Toggle parity over. 23 Base 64 KB sequential data R/W test passed. 24 Setup required before vector initialization completed. 25 Interrupt vector initialization done. 26 I/O port of 8042 read. 27 Global data initialization is over.

MINI6600TM Imaging System Service Manual - Workstation Software 28 Initialization after interrupt vector is completed. 29 Monochrome mode setting is done. 2A Color mode setting is done. 2B Toggle parity over. 2C Processing before video ROM is done. 2D Optional video ROM control is done. 2E Return from processing after the video ROM control. 2F EGA/VGA not found. 30 Display memory R/W test passed. 31 Display memory R/W test or retrace checking failed. 32 Alternate display memory R/W test passed. 33 Video display checking over. 34 Verification of display adapter done. 35 Display mode set completed. 36 BIOS ROM data area check over. 37 Cursor setting for power on message ID complete. 38 Power on message display complete. 39 New cursor position read and saved. 3A Reference string display is over. 3B Hit message displayed. 40 Preparation for virtual mode test started. 41 Returned after verifying from display memory.

MINI6600TM Imaging System Service Manual - Workstation Software 42 Descriptor tables prepared. 43 Entered in virtual mode. 44 Interrupts enabled (if diagnostics switch is ON). 45 Data initialized. 46 Memory remap test is done, memory size calculation is over. 47 Pattern to be tested written in extended memory. 48 Patterns written in base memory. 49 Amount of memory below 1 MB found and verified. 4A Amount of memory above 1 MB found and verified. 4B BIOS ROM data area check over. 4C Memory below 1 MB cleared (soft reset). 4D Memory above 1 MB cleared (soft reset). 4E Memory test started (no soft reset). 4F Memory size display started. This will be updated during memory test. 50 Memory test below 1 MB completed. 51 Memory size adjusted due to relocation / shadow. 52 Memory test above 1 MB completed. 53 CPU registers are saved, including memory size. 54 Shutdown successful, CPU in real mode. 55 Registers restored. 56 A20 address line disable successful. 57 BIOS ROM data area check halfway.

MINI6600TM Imaging System Service Manual - Workstation Software 58 BIOS ROM data area check over. 59 Hit message cleared. message displayed. 60 DMA page register test passed. 61 Display memory verification over. 62 DMA #1 base register test passed. 63 DMA #2 base register test passed. 64 BIOS ROM data area check halfway. 65 BIOS ROM data area check over. 66 DMA unit 1 and 2 programming over. 67 8259 initialization over. 80 Keyboard test started. 81 Keyboard reset error / stuck key found. 82 Keyboard controller interface test over. 83 Command byte written. Global data initialization done. 84 Lock key check over. 85 Memory size check done. 86 Password checked. 87 Programming before setup completed. 88 Returned from CMOS setup program and screen is cleared. 89 Programming after setup completed. 8A First screen message displayed. 8B message displayed. Mouse check and initialization done.

MINI6600TM Imaging System Service Manual - Workstation Software 8C Main and video BIOS shadow successful. 8D Setup options are programmed. 8E Hard disk, floppy reset applied. 8F Floppy check returns that floppy is to be initialized. 90 Floppy setup is over. 91 Hard disk presence test over. 92 Hard disk setup complete. 93 BIOS ROM data area check halfway. 94 BIOS ROM data area check over. 95 Memory size adjusted due to mouse support, hard disk type 47. 96 Returned after verifying from display memory. 97 Any initialization before C800 optional ROM control is over. 98 Optional ROM control is done. 99 Any initialization required after optional ROM test over. 9A Return after setting timer and printer base address. 9B Returned after RS-232 base address. 9C Required initialization before co-processor test is over. 9D Co-processor initialized. 9E Initialization after co-processor test is completed. 9F Extended keyboard check is done, ID flag set, numlock ON/OFF. A0 Keyboard ID command issued. A1 Keyboard ID flag reset.

MINI6600TM Imaging System Service Manual - Workstation Software A2 Cache memory test over. A3 Soft error display complete. A4 Keyboard typematic rate set. A5 Memory wait states programming over. A6 Screen cleared. A7 NMI and parity enabled. A8 Initialization before E000 ROM control over. A9 Returned from E000 ROM control over. AA Initialization after E000 optional ROM control is over. 00 System configuration displayed.

MINI6600TM Imaging System Service Manual - Workstation Software Option ROM BIOS Error Codes Some of the error codes used by the AMI BIOS are the same as those codes used by the Option ROM and the nobrk.com program. You must check both error codes if any of the following codes display on the LEDs.

Code 80

Description Started Execution of Option ROM Code

81

NEAT TEST Fail -Reset

82

Bad GSP Load Self Loop with Interrupts Disabled

83 thru 8F Undefined

90

Started Disk Boot Procedure

91

Data Error on Disk Read

92

Controller Error

94

Seek Failure

Possible Causes 1. Bad Option ROM 2. Bad Communication PCB 3. 386 Motherboard not functioning 1. Bad Option ROM 2. Bad Communication PCB 3. 386 Motherboard not functioning 1. Bad Option ROM 2. Bad Communication PCB 3. 386 Motherboard not functioning 1. Software Corruption 2. Bad Sector on Hard Disk 3. 386 Motherboard not functioning 1. Hard Drive 2. Communication PCB 3. 386 Motherboard not functioning 1. Hard Drive 2. Communication PCB 3. 386 Motherboard not functioning 1. Bad Option ROM 2. Bad Communication PCB 3. 386 Motherboard not functioning 1. Hard drive 2. Communication PCB 3. 386 Motherboard not functioning

MINI6600TM Imaging System Service Manual - Workstation Software 98

Disk Timed Out (Failed to Respond)

99 thru 9F Undefined

Tsrser.Exe (Executed by Autoexec.bat) Code Description B0 Undefined

B1 B2 B3

Enter TSR Install Undefined Previous User Interrupt Not Null

B4 Changing User Interrupt vector B5 Initialize Hardware Vector B6 Initialize Vector B7 thru BD Undefined BE Successful Installation BF Tsrser Already Installed

1. 2. 3. 1. 2.

Hard drive Communication PCB 386 Motherboard not functioning Software Corruption Bad Sector on Hard Disk

3.

386 Motherboard not functioning

Possible Causes 1. Software Corruption 2. Bad Sector on Hard Disk 3. 386 Motherboard not functioning

1. 2. 3.

Possible software corruption Possible bad sector on Hard Disk 386 Motherboard not functioning

Loadip.Exe (Executed By Autoexec.bat) Code D0 D1 D2 D3

Description Program Started Execution Error Opening GSP Object File Undefined Seek Error

Possible Causes 1. Software Corruption 2. Bad Sector on Hard Disk 3. 386 Motherboard not functioning 1. Hard Drive 2. 386 Motherboard not functioning

MINI6600TM Imaging System Service Manual - Workstation Software D4 D5 D6 D7 D8 D9 DA DB DC DD DE DF

Seek Error On Data

1. 2. Virtual Address Error 1. Error Reading File Header 2. Error in Test Program Response Prior to Load 3. Undefined Undefined 1. Load Complete and Successful 2. Undefined 3. No Acknowledge from GSP 1. Error Reading GSP Ready Flag 2. Error Reading GSP Error Flag 3. GSP Program Load Failed

Cart.Exe (Executed By Autoexec.bat) Code Description E0 Workstation Program Executing E1 thru EB Undefined EE Unexpected Processor Exception EF Undefined F0 Workstation Program Exited to DOS F1 thru FA Undefined FB GSP is not Ready FC FD FE FF

GSP is not responding Front Panel is not Functioning Undefined Int 19H Boot

Hard Drive 386 Motherboard not functioning Software Corruption Bad Sector on Hard Disk 386 Motherboard not functioning Software Corruption Bad Sector on Hard Disk 386 Motherboard not functioning Software Corruption Image Processor PCB 386 Motherboard not functioning

Possible Causes 1. Software Corruption 2. Bad Sector on Hard Disk 3. 386 Motherboard not functioning

1. 2. 3. 1. 2. 3.

Software Corruption Image Processor PCB 386 Motherboard not functioning Connectors Front Panel Processor 386 Motherboard not functioning


DOS Runtime Errors Runtime errors cause the program to display an error message and terminate. Error messages display in the Status Bar, located on the right Workstation monitor, as shown. System Error nnn at xxxx:yyyy Where nnn is the runtime error number and xxxx:yyyy is the runtime address (segment and offset). The runtime errors divide into four categories: • • • •

DOS errors 1 - 99 I/O errors 100 - 149 Critical errors 150 - 199 Fatal errors 200 - 255

Note: In this context, a critical error will cause the current operation to stop or abort. A fatal error will abort the application. Runtime Errors that are the most likely to occur in the Workstation appear in the following tables:

DOS Errors Code 2

Description File not found

3 4 6 15

Path not found Too many open files Invalid file handle Invalid drive number

Possible Causes Possible corrupted file on the disk Also caused by incorrectly loaded or missing HELP files. Possible corrupted file on the disk Not enough memory to open file Possible file name corrupted Software unable to communicate with the disk drive

MINI6600TM Imaging System Service Manual - Workstation Software I/O Errors Code 100 101 103 104 105

Description Disk read error Disk write error File not open File not open for input File not open for output

Possible Causes File did not read correctly File written to disk incorrectly Software unable to open file Software unable to open file Software unable to open file

Critical Errors Code 152 153 154 156 158 159 160 161 162

Description Drive not ready Unknown command CRC error in data Disk seek error Sector not found Printer out of paper Device write fault Device read fault Hardware failure

Possible Causes Software unable to communicate with the disk drive Software does not recognize command Checksum incorrect Disk hardware fault Disk hardware fault

Description Range check error Stack overflow error Heap overflow error Invalid pointer operation Communication error Communications error Communications error

Possible Causes A numerical value exceeded the limits of the software Possible memory error on the 386 Motherboard Possible memory error on the 386 Motherboard Possible memory error on the 386 Motherboard Workstation control panel PCB or cable fault See below Workstation control panel PCB or cable fault

Error while writing to the disk drive Error while reading from the disk drive Possible fault on 386 Motherboard

Fatal Errors Code 201 202 203 204 250 thru 252 253* 254 thru 260


*Error 253 occurs when the system does not boot fully and displays the “system error #253” message. This message associates with a loss of serial communication. If an error message, such as “system error 253 at 0000:01F0” displays, the numbers indicate the memory location where software detected the error. Record the error message, including the address, in the error report to OEC. This is helpful information necessary for OEC to diagnose the problem.

MINI6600TM Imaging System Service Manual - Workstation Software DIAGNOSTICS Diagnostic tests are available for use in evaluating the operation of the Workstation electronics. The tests, selectable from the System Diagnostics Menu, are described in the following pages. 1.

Press the SETUP OPTIONS key on the Workstation. The Setup Options screen will appear.

2.

Insert the OEC Boot and Diagnostic disk into the disk drive.

3.

Select Access Level 2 and press the ENTER key.

4.

Select Run System Diagnostics and press ENTER.

This screen appears when you select Run System Diagnostics from the Service Options Menu. The tests available from this menu are described below:

RUN SYSTEM DIAGNOSTICS Front Panel Test System Memory Tests Image Processor Tests Toggle Motion Artifact Use the cursor arrow keys to select option, then press ENTER. Press the ESC key to exit and return to previous screen.

MINI6600TM Imaging System Service Manual - Workstation Software Front Panel Test Selecting Front Panel Test from the System Diagnostics Menu brings up a screen similar to the one below. (This display will contain only the instructions at the bottom of the screen until the keys are pressed.) Descriptions for each portion of the screen are listed below:

kbd = 0

led = 3

ifr = 16 X = 118,

Y = 20,

SW = 0

Level = 19 > > > > > > > > > > > > > > > > Window = 49> > > > > > > > > > > > > > > Press Function Buttons, twiddle TrackPad, twist window and level. Arrow keys on keyboard light LEDs. [ESC] Exits

Brightness & Contrast - These values change with adjustment of Brightness and Contrast. Both values will change from 0 - 80.


KBD - Press each key on the Front Panel and the Control Panel. The kbd value should display a different number (which represents the hex keycode) for each key pressed. The value is displayed when you release each key. A different audible tone occurs for each key pressed. Key Pressed

KBD Value

AUTO NEGATE VCR RECORD VCR PLAY FLUORO ONE SHOT ENHANCED AVERAGING < AVERAGING > L>R

82 81 66 67 104 110 109 106 105 97

MINI6600TM Imaging System Service Manual - Workstation Software LED - Use the left and right cursor keys to turn on each LED on the Front Panel and the Control Panel. The LED value shown on the screen will change to represent each LED as it lights up. LED Number 5 6 9 10 16 19 20 21 22 23

LED Name NEGATE VCR RECORD MANUAL VCR PLAY FLUORO ENHANCED ONE SHOT MEDIUM AVERAGING LOW AVERAGING HIGH AVERAGING

System Memory Tests This screen appears, and memory tests similar to the following, begin automatically when you select System Memory Tests from the System Diagnostics Menu. If failures occur, the program will stop at the point of failure and an error message will display the address of the bad memory location. Press ENTER to continue memory tests from that point. SYSTEM MEMORY TESTS AT Base Memory PASSED AT Extended Memory TESTING (error messages appear here when failures occur) Press [ENTER] to Continue Press [ESC] to Exit Press [F2] to Repeat

MINI6600TM Imaging System Service Manual - Workstation Software Image Processor Tests These Image Processor Tests begin automatically when you select this test option from th e System Diagnostics Menu. If test failures occur, the program will halt at the point of failure and display an error message. Press ENTER to continue testing from that point.

IMAGE PROCESSOR MEMORY TESTS

Image Memory Left Filter RAM Right Filter RAM Left Bit Planes Right Bit Planes Left LUT Right LUT

PASSED PASSED PASSED PASSED PASSED PASSED PASSED

(error messages appear here when failures occur) Press [ENTER] to Continue Press [ESC] to Exit Press [F2] to Repeat

MINI6600TM Imaging System Service Manual - Workstation Software Toggle Motion Artifact Toggle Motion Artifact is not functional on the MINI6600 Systems. Other Access Level 2 Service Options

SERVICE OPTIONS Run System Diagnostics Load 6600 EEPROM Copy Diskette Video Calibration Generator Configuration Shot Log File System Configuration

Load 6600 EEPROM This appears in the C-arm Software section of this manual.

Copy Diskette This function is similar to the DOS copy disk function used to duplicate a diskette.

MINI6600TM Imaging System Service Manual - Workstation Software Video Calibration Choices are: • Show Video Test Pattern: • Camera Rotation Calibration: • Monitor/Camera Alignment:

produces the same video test pattern displayed when you press the Test Pattern key on the control panel Not used on the MINI6600 A monitor/camera alignment pattern is displayed on both left and right monitors. Refer to the Procedures section of this manual for informa tion on the monitor and camera alignments.

Generator Configuration This appears in the C-arm Software section of this manual.

SET CONFIGURATION

System Configuration

Line Frequency (Hz): System Model: SP Archive: yes Language: English VCR1: Sony VCR2: Sony

Screens displayed under System Configuration:

Digital Print:

Shot Log File Used to access X-ray Shot Log file.

•

Set System Configurations

50/60

Serial Number: 12345678 Hospital Name: XXXXX Mars Table: Domestic SET IMAGING DEFAULTS

•

Imaging Defaults

Set Averaging Defaults Set Window and Level Defaults

MINI6600TM Imaging System Service Manual - Workstation Software Control Panel Tests To run these tests, expose the Control Panel Processor Board located under the keyboard to allow viewing of the Diagnostics LED array. To call the Control Panel Processor PCB diagnostic program you must close the diagnostic switch by installing a shorting jumper on E1, pins 7-8. This diagnostic tests the LED drivers and the key matrices as well as provide a visual indication of the integrity of both as you press each key.

Diagnostic Key Code Display The row and column of any key pressed is displayed on the LED diagnostic array (DS1) with the LSB to the left and the MSB to the right; the row in bits 0-3 and the column in bits 4-7.

The following tables detail the codes displayed to indicate the key pressed:

QWERTY Keys KEY HELP ANNOTATE (PATIENT) DISK VIEW IMAGE DIR (NOT USED) (blank)

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 0000 0000 XX 0,0 0000 1000 XX 0,1 0000 0100 XX 0,2 0000 1100 XX 0,3 0000 0010 XX 0,4

MINI6600TM Imaging System Service Manual - Workstation Software KEY MARKERS (NOT USED) X-RAY SUMMARY (NOT USED) (blank) SPECIAL APPS (NOT USED) TEST PATTERN (blank) CUSTOMIZE (NOT USED) SETUP OPTIONS UNLABELED #1 UNLABELED #2 (blank) 1 2 3 4 5 6 7 8 9 0 = BKSP ESC (blank) (blank)

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 0000 1010 XX 0,5 0000 0110 XX 0,6 0000 1110 XX 0,7 0000 0001 XX 0,8 0000 1001 XX 0,9 0000 0101 XX 0,10 0000 1101 XX 0,11 0000 0011 XX 0,12 0000 1011 XX 0,13 0000 0111 XX 0,14 0000 1111 XX 0,15 1000 0000 XX 1,0 1000 1000 XX 1,1 1000 0100 XX 1,2 1000 1100 XX 1,3 1000 0010 XX 1,4 1000 1010 XX 1,5 1000 0110 XX 1,6 1000 1110 XX 1,7 1000 0001 XX 1,8 1000 1001 XX 1,9 1000 0101 XX 1,10 1000 1101 XX 1,1 1000 0011 XX 1,12 1000 1011 XX 1,13 1000 0111 XX 1,14 1000 1111 XX 1,15

MINI6600TM Imaging System Service Manual - Workstation Software Qwerty Keys (continued) KEY TAB q w e r t y u i o p [ ] HOME UP PGUP CTRL a s d f g h j k l

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 0100 0000 XX 2,0 0100 1000 XX 2,1 0100 0100 XX 2,2 0100 1100 XX 2,3 0100 0010 XX 2,4 0100 1010 XX 2,5 0100 0110 XX 2,6 0100 1110 XX 2,7 0100 0001 XX 2,8 0100 1001 XX 2,9 0100 0101 XX 2,10 0100 1101 XX 2,11 0100 0011 XX 2,12 0100 1011 XX 2,13 0100 0111 XX 2,14 0100 1111 XX 2,15 1100 0000 XX 3,0 1100 1000 XX 3,1 1100 0100 XX 3,2 1100 1100 XX 3,3 1100 0010 XX 3,4 1100 1010 XX 3,5 1100 0110 XX 3,6 1100 1110 XX 3,7 1100 0001 XX 3,8 1100 1001 XX 3,9

MINI6600TM Imaging System Service Manual - Workstation Software Qwerty Keys (continued) KEY ; ‘ CR LFT (blank) RT LSHIFT z x c v b n m , . / (blank) RSHIFT END DOWN PGDN ALT ‘ (blank) (blank)

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 1100 0101 XX 3,10 1100 1101 XX 3,11 1100 0011 XX 3,12 1100 1011 XX 3,13 1100 0111 XX 3,14 1100 1111 XX 3,15 0010 0000 XX 4,0 0010 1000 XX 4,1 0010 0100 XX 4,2 0010 1100 XX 4,3 0010 0010 XX 4,4 0010 1010 XX 4,5 0010 0110 XX 4,6 0010 1110 XX 4,7 0010 0001 XX 4,8 0010 1001 XX 4,9 0010 0101 XX 4,10 0010 1101 XX 4,11 0010 0011 XX 4,12 0010 1011 XX 4,13 0010 0111 XX 4,14 0010 1111 XX 4,15 1010 0000 XX 5,0 1010 1000 XX 5,1 1010 0100 XX 5,2 1010 1100 XX 5,3


Qwerty Keys (continued) KEY (blank) (blank) (blank) (blank) (blank) (blank) Space \ DEL (blank) (blank) (blank)

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 1010 0010 XX 5,4 1010 1010 XX 5,5 1010 0110 XX 5,6 1010 1110 XX 5,7 1010 0001 XX 5,8 1010 1001 XX 5,9 1010 0101 XX 5,10 1010 1101 XX 5,11 1010 0011 XX 5,12 1010 1011 XX 5,13 1010 0111 XX 5,14 1010 1111 XX 5,15


Top Control Panel Keys KEY Auto Brightness & Contrast Brightness DN Brightness UP Contrast DN Contrast UP Negate VCR Record VCR Play

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 0001 0100 XX 8, 2 1001 0010 XX 9, 4 1001 1100 XX 9, 3 1001 1000 XX 9, 1 1001 0000 XX 9, 0 0001 1000 XX 8, 1 0110 0100 XX 6, 2 0110 1100 XX 6, 3

Front Control Panel Keys KEY Fluoro One Shot Enhanced Avg DN Avg UP L>R

DIAGNOSTIC DISPLAY 0123 4567 89 Row, Col. 1101 0000 XX 11, 0 1101 0110 XX 11, 6 1101 1010 XX 11, 5 1101 0100 XX 11, 2 1101 1000 XX 11, 1 0101 1000 XX 10, 1

MINI6600TM Imaging System Service Manual - Workstation Software RAM Test Execute the RAM test by simultaneously pressing and releasing both the CTRL and CUSTOMIZE keys on the QWERTY panel. The RAM Test verifies that the RAM is functional between address 0X8000 and 0XEFFF. It also verifies that the RAM is not accessible from 0XF000 to 0XFFFF, which are decoded as I/O addresses. The RAM test takes approximately 1 second, during which time LEDs 8 and 9 on the diagnostic display will indicate test activity. If the RAM test is successful, the pattern below will appear on the diagnostic LED display.

Note: LED segment 9 will be blinking.

If the RAM test fails, the pattern below will appear on the diagnostic LED display and the pattern will blink (along with segment #9).

MINI6600TM Imaging System Service Manual - Workstation Software Tone Control Keys The following keys on the QWERTY keyboard produce tones. The key pressed determines the tone produced. Specific tones produced appear below (note that all keys produce a tone in diagnostic mode):

KEY PRESSED 1 2 3 4 5 6 7 8 I J K COMMA M N

APPROX. TONE 100 HZ 200 HZ 300 HZ 400 HZ 500 HZ 600 HZ 700 HZ 800 HZ 900 HZ 1000 HZ 1100 HZ 1200 HZ 1300 HZ 1400 HZ

LED Control Keys Specific keys will turn on specific LED drivers. The tables below indicate the key assignments along with the respective LED drivers activated.

KEY KEY ROW, COL. 1-8 1,0-7 Q-I 2,1-8 A-K 3,1-8 Z-(COMMA) 4,1-8 SETUP OPTIONS 0,12

LED TURNED ON 0-7, Respectively 8-15, Respectively 16-23, Respectively 24-31, Respectively 0-31


Watchdog Reset Test Key (Esc) Pressing the ESC key will test the watchdog timer by disabling interrupts and waiting for a reset from the watchdog. When you press ESC, the diagnostic LED bargraph will display the ESC key code and segment 9 will stop blinking for the period set up on the watchdog (approximately 1.6 seconds) and then return to all off except LED 9, which will resume its normal blinking mode.

MINI6600TM Imaging System Service Manual - Workstation Imaging System

WORKSTATION IMAGING SYSTEM OVERVIEW This section contains information regarding the video signals used in the MINI6600 system. To include: • • • •

Video Signal Video Path Video Control Image Storage

Refer to the following schematic diagrams for this section.

Mini 6600 Interconnect Diagram, Schematic # 00-878780 Workstation Interconnect Diagram, Schematic # 00-877970 Auxiliary Interface PCB, Schematic # 00-876502 Video Switching PCB, Schematic # 00-872237 Image Processor PCB, Schematic # 00-875952 Fast Scan Converter PCB, Schematic # 00-876397 Schematic # 00-878889 High Scan Brightness/Contrast Control PCB, Schematic # 00-876351 IR Receiver PCB, Schematic # 00-874220

MINI6600TM Imaging System Service Manual - Workstation Imaging System VIDEO SIGNAL INTERLACED VIDEO The video signal produced by the CCD camera meets the RS-170 standard for domestic use and the PAL standard for international use. The following video waveforms show the horizontal and the vertical timing and the typical video waveforms at TP28 on the 6600 Controller PCB.

FIGURE 1 - VERTICAL TIMING

FIGURE 2 - HORIZONTAL TIMING

MINI6600TM Imaging System Service Manual - Workstation Imaging System HIGH SCAN NON-INTERLACED VIDEO The following video waveforms, from TP4 on the Scan Converter PCB, show the horizontal and the vertical timing and the typical video sent to the Fast Scan monitors.

FIGURE 3 - VERTICAL TIMING

FIGURE 4 - HORIZONTAL TIMING

MINI6600TM Imaging System Service Manual - Workstation Imaging System VIDEO PATH

FROM 6600 CONTROLLER PCB * = COAX CONNECTOR

WORKSTATION

P13 * BNC

The video signal passes through the printed circuit boards, connectors and wiring shown here as it travels through the Workstation.

1

2

WORKSTATION ELECTRONIC BOX

P10

AUX. INTERFACE PCB 00-876502 J1 * J6 * VIDEO SWITCHING PCB 00-872237

J2*

J4

J1* VIDEO SWITCHING MATRIX

J6*

J3

* INTERNAL VCR *

* THERMAL PRINTER

5

5

6

6

ADC

LEFT VIDEO

9

9

GSP

10

10

DAC

J11

P4 IMAGE PROCESSOR PCB 00-875952

LEFT HIGH SCAN MONITOR J1*

P9 8

8

RIGHT HIGH SCAN MONITOR J1*

RIGHT VIDEO

J2 DAC

J7* J4* J5*

SCAN CONVERTER PCB 00-876397

J8*

FIGURE 5 - WORKSTATION VIDEO PATH

MINI6600TM Imaging System Service Manual - Workstation Imaging System CIRCUIT BOARD LOCATION

Video Switching PCB Aux. Interface PCB

386 Motherboard PCB Image Processor PCB

Communications PCB

Fast Scan Converter PCB


AUXILIARY INTERFACE PCB The purpose of the Auxiliary Interface PCB is to distribute the control and video signals to various locations within the electronic box in the Workstation. Camera video enters the Workstation from the A20 to J13 C-Arm cable assembly. The cable assembly is part of the 6600 Controller PCB. The video signal enters the Workstation electronics box at J13. The video signal enters the Auxiliary Interface PCB at connector P10 on pin 1 and exits on coax connector J1. The video signal goes to J6 on the Video Switching PCB.

VIDEO SWITCHING PCB The purpose of the Video Switching PCB is to route video signals to various locations in the Workstation. Video signals travel to the VCR and Thermal Printer. The routing is accomplished by an 8 input, 6 output, crosspoint switch matrix on the Video Switching PCB. The Image Processor PCB controls this serial to parallel routing. The Video Switching PCB also contains a video clamp, log amplifier, anti-alias filter and genlock circuits. Refer to the Video Control topic in this section for more information. The video signal enters the Video Switching PCB at J6 and buffered by U4 and runs through a DC restoration clamp (U7) to restore the video sync tips to ground. Monitor the video at TP10. The video signal travels to the video switching matrix to MUX chip U13 IN0 (pin 5). The video signal leaves U13 at VOUT (pin 20). The video signal runs through another DC restoration clamp and buffered by U15. Monitor the video signal at TP16 (A/D VIDEO). The video signal travels back to the video switching matrix where it bypasses the logarithmic amplifier (U46 and U26). The video signal travels back to the video switching matrix where it may go to an anti-alias filter (U25 and U24). The anti-alias filter limits the video signal to 5 MHz. Monitor the video signal from the anti-alias filter circuit at TP18 (A/D VIDEO). The video signal leave s the Video Switching PCB at connector J11 pin 5 and travels to the Image Processor PCB, P4 pin 5. See t he Video Control topic in this section for more information on video routing.


IMAGE PROCESSOR PCB The Image Processor PCB contains a Graphic System Processor (GSP) which controls all Workstation functions. The Image Processor PCB is multilayer and uses surface mount circuits. For this reason, factory repair of the Image Processor PCB is recom mended. Use system level diagnostics to determine the functionality of the Image Processor PCB. See th e Video Control topic in this section for more information. The video signal enters the Image Processor PCB via connector P4 pin 5. Monitor the video signal at TP3 on the Image Processor PCB. The video signal travels to A/D converter U17 where each pixel is converted to an 8 bit digital number. The workstation function selected determines the digital video signal processing. Left and right digital video signals travel out of the Image Processor PCB as an 8 bit digital signal via connector P8 to the Scan Converter PCB. Video to the VCR and Thermal Printer is analog video from the D/A converters U2 and U16 in the Image Processor PCB and exit via P4 pin 9 that goes back to the Video Switching PCB.

SCAN CONVERTER PCB The Scan Converter PCB receives the left and right digital video data from the Image Processor PCB. The digital video data is in the interlace scan format at a horizontal frequency of 15.750 kHz and a vertical frequency of 60 Hz (domestic) or 50 Hz (international). The Scan Converter PCB receives horizontal sync, vertical sync, odd and even field identification, and pixel clock timing signals along with the left and right 8 bit video data from the Image Processor PCB. The signals leave the Image Processor PCB at connector P9 and enter the Scan Converter PCB via J2. The Scan Converter PCB converts the digital video signal from the interlace format to the progressive scan format and converts the horizontal frequency to 37.8 kHz and the vertical frequency to 72 Hz (domestic use) or 61 Hz (international use). The left and right digital video is then converted to an analog video signal by D/A converters U20 and U21. Monitor the analog video signals from the D/A converters at TP4 (left video) and TP1 (right video).

MINI6600TM Imaging System Service Manual - Workstation Imaging System The video signals exit the board at J5 (left video) and J4 (right video) and exit the Electronics Box at J8 (left video) and J7 (right video) to the Fast Scan Monitors. An additional left video output is available at J8 on the Scan Converter. Monitor the additional left video output at TP2. This video signal travels to J17 (FAST SCAN VIDEO) on the rear panel of the Workstation as an additional video output for an external fast scan monitor.

COMMUNICATIONS PCB See the Workstation Control section for information on this board.

Fast Scan Monitors The Fast Scan monitors receive analog video signals from the Scan Converter PCB in progressive high scan format for image display

PERIPHERALS Analog interlace video goes to the VCR and thermal printer via the Video Switching PCB.

VCR Video to and from the VCR travels through the Video Switching PCB. The video to the VCR can be unprocessed or processed and selected by the Workstation software.

VCR Output Video - The video leaves the VCR at the Video Out BNC connector. The video signal enters the Workstation electronics box at BNC connector J1 located at the back of the electronics box in the upper left hand corner. The VCR video signal enters the Video Switching PCB at connector J4 on pin 3. A DC Restoration clamp (Q2) restores the video sync tips to ground. Monitor the incoming VCR video at TP13 (VCR1). The video signal travels to the video switching matrix to MUX chip U13, Input 0, (pin 5). The video signal leaves U13 at VOUT (pin 20). The video signal runs through a DC restoration clamp and buffered by U15. Monitor the video signal at TP16 (A/D VIDEO). The video signal travels back to the video switching matrix and bypasses the logarithmic amplifier (U46 and U26). The switching matrix then directs the signal to an anti-alias filter (U25 and U24).


Monitor the video signal from the anti-alias filter circuit at TP18 (A/D VIDEO). The video signal leaves the Video Switching PCB at connector J11 pin 5 and travels to the Image Processor PCB connector P4 pin 5.

THERMAL PRINTER Video to the Thermal Printer comes from two different sources. The source depends on whether the Fluoro X-rays are on or off.

X-ray Off Condition: In the X-ray off condition the video signal comes from the Image Processor PCB via D/A converter U2. The video leaves the Image Processor PCB at P4 pin 9 and travels to J11 pin 9 on the Video Switching PCB. The video signal runs through a DC Restoration Clamp (U17) to restore the video sync tips to ground. Monitor the video at TP20 (LDAC) on the Video Switching PCB. The video signal travels to the video switching matrix where it travels to MUX chip U8, INPUT 2, (pin 9). The video signal leaves U8 at VOUT (pin 20). Amplifier U1 buffers the video signal from U8 and the video signal then travels to connector J3 pin 9. Monitor the video signal at TP5 (HCO). The video signal exits the front of the electronics box at BNC connector (located behind keyswitch). The video signal runs from J6 to the Thermal Printer.

X-ray On Condition: In the X-ray on condition the CCD Camera supplies the video signal via the Video Switching PCB (See FIGURE ’s 5 and 6). The video signal enters the Video Switching PCB at J6, and is buffered by U4 and runs through a DC Restoration Clamp (U7) to restore the video sync tips to ground. Monitor the video signal at TP10. The video signal travels to the video switching matrix where it travels to MUX chip U8, Input 0, (pin 5). The video signal leaves U8 at VOUT (pin 20). Amplifier U1 buffers the video signal from U8 and the video signal then travels to connector J3 pin 9. Monitor the video signal at TP5 (HCO). The video signal exits the front of the electronics box at (BNC connector) J6. The video signal runs from J6 to the Thermal Printer.

MINI6600TM Imaging System Service Manual - Workstation Imaging System VIDEO CONTROL IMAGE PROCESSOR PCB The Image Processor controls all the Workstation image processing functions. The Image Processor PCB contains a Graphic System Processor (GSP) driven by a 50 MHz clock. The GSP provides control signals to the Video Switching PCB and the Scan Converter PCB. Because the Image Processor PCB is multilayer and uses surface mount circuits, repair of this board, apart from the factory, is not recommended. Use the system based diagnostic test programs to determine the proper operation of the Image Processor PCB.

A/D CONVERTER The video signal enters the Image Processor PCB via connector P4 pin 5. Monitor the video signal at TP3 on the Image Processor PCB. The video signal travels to the A/D converter U17 where it is converted to an 8 bit digital number. The digital video data travels to the scan converter section of the Image Processor PCB.

SCAN CONVERTER The Scan Converter section consists of a two video frame memory that receives the digital video data from the A/D converter U17. The video data writes into one frame of memory at a time. When the first frame of memory is full the video data writes into the second frame of memory. The first frame of video data is read out to the Image Processor circuit while the second frame of video data is read in. By changing the way the video data is read out of the frame memory, the scan converter is able to provide the horizontal image reversal control for the images displayed on the monitors and the peripherals.

D/A CONVERTERS After the Image Processor circuit processes the video data, the left and right video data travels to the D/A converters U2 (LVID) and U16 (RVID). The D/A converters convert the processed digital video data into an

MINI6600TM Imaging System Service Manual - Workstation Imaging System analog video signal. The VCR and Thermal Printer utilize the left video signal. The left video signal exits the Image Processor PCB via P4 pin 9 where it goes to the Video Switching PCB. The right video signal exits the Image Processor PCB via P4 pin 1 that also goes back to the Video Switching PCB. The right video signal is not being used.

SCAN CONVERTER PCB INTERFACE When the Image Processor circuit processes the video data the left and right video data travels to the scan converter interface circuit. The scan converter interface buffers the left and right video data out of the Image Processor PCB via connector P9 to the Scan Converter PCB.

PIO VIDEO CONTROL The Image Processor PCB contains two PIO chips. PIO U4 provides internal control signals used within the Image Processor PCB. PIO U3 provides external control signals for the Video Switching PCB and the monitors input signals from the Video Switching PCB. The Image Processor creates a 24 bit serial data output through PIO U3 to control the Video Switching PCB. The 24 bit serial data output from U3 to the Video Switching PCB controls the following items: • • • • •

Video Crosspoint Switch Genlock Anti-Alias Filter Logarithmic Amplifier X-ray Disable.

IMAGE PROCESSOR TEST DIAGNOSTICS Diagnostic tests are available for use in evaluating the operation of the Image Processor PCB. The descriptions of the System Diagnostics Menu tests follow. 1. Press the SETUP OPTIONS key on the Workstation. The Setup Options screen will appear. 2. Insert the OEC Boot and Diagnostic disk into the disk drive. 3. Select Access Level 2 and press ENTER.

MINI6600TM Imaging System Service Manual - Workstation Imaging System 4. Select Run System Diagnostics and press ENTER. When you select Run System Diagnostics from the Service Options Menu this screen appears. Select the Image Processor Tests from the menu shown below:

RUN SYSTEM DIAGNOSTICS

Front Panel Test System Memory Tests Image Processor Tests Toggle Motion Ar tifact

Use the cursor arrow keys to select option, then press ENTER. Press the ESC key to exit and return to previous screen.

MINI6600TM Imaging System Service Manual - Workstation Imaging System When you select the Image Processor Tests from the System Diagnostics Menu, they begin automatically. If test failures occur, the program will halt at the point of failure and display an error message. Press ENTER to continue testing from that point.

IMAGE PROCESSOR MEMORY TESTS

Image Memory Left Filter RAM Right Filter RAM Left Bit Planes Right Bit Planes Left LUT Right LUT

PASSED PASSED PASSED PASSED PASSED PASSED PASSED

(error messages appear here when failures occur) Press [ENTER] to Continue Press [ESC] to Exit Press [F2] to Repeat

Because the Image Processor PCB is multilayer and uses surface mount circuits, do not attempt to repair this PCB away from the factory.

MINI6600TM Imaging System Service Manual - Workstation Imaging System VIDEO SWITCHING PCB The Image Processor PCB controls the Video Switching PCB utilizing a 24 bit serial data control word. Monitor the 24 bit serial control word (VMDATA) at TP35. VMDATA travels to the Video Switching PCB at P6 pin 11. VMDATA goes into the first of three serial to parallel shift registers operating in cascade (U33 U35). VMDATA is clocked into the three serial to parallel converters by VM-DTCLK at pin 11 on each shift register. Monitor VM-DTCLK at TP37. After the serial control word has been clocked into the shift registers, VM-LTCLK is applied to the each shift register at pin 12. Monitor VM-LTCLK at TP36. VM-LTCLK latches the control word to the parallel output of the shift registers. The shift register outputs turn on and off the control functions on the Video Switching PCB. Eighteen bits of the control word route the video signals in the crosspoint switch circuit. The remaining 6 bits turn on or off the following circuits: • • • • •

Logarithmic amplifier Anti-Alias Filter Genlock X-ray Disable 60/50 Hz Video.

VIDEO SWITCHING CONTROL Each of the multiplexers (U8 -U13) in the crosspoint switch circuit has 8 video inputs with only one selected at a time. The states of the address control inputs, A0 -A2, of these multiplexers control which video input is selected. Each multiplexer amplifies the input video signal by an internal video amplifier and output at pin 20. The amplifiers in the multiplexers have a gain of 2, allowing for the proper video termination of each video output.

ANTI-ALIAS FILTER CONTROL The anti-alias filter is designed to eliminate alias artifacts and prevent high frequency noise in the video signal from being sampled by the A/D converter. R73, C57, C54, L9, C52, L10, C16, and R75 comprise the anti-alias filter. The anti-alias filter is designed to pass frequencies to 5 MHz. The anti-alias filter is selected in all modes.

MINI6600TM Imaging System Service Manual - Workstation Imaging System GENLOCK CONTROL The genlock circuit provides the timing synchronization between the Image Processor PCB and the incoming video signal from the CCD camera. The master sync source is the CCD camera. The genlock circuit synchronizes (slaves) the sync generator, U40, on the Video Switching PCB, to the CCD camera. Phase comparator U44 compares the phase of the internally generated horizontal sync from U40, and that of the incoming video signal from the CCD camera. The output of U44 goes through a low pass filter, forming a control voltage on tuning diode CR1 that control’s the frequency of VCO U43. PAL U29 divides the output of the VCO by ten. The signal travels to the OS2 input of the sync generator U40. When an incoming video signal is present, under normal conditions, VCO U43 provides the clock for the sync generator U40. When no CCD camera sync is present in the Video Switching PCB, sync detector U28 sets PIO U3 pin 18 low on the Image Processor PCB to turn off the genlock circuit. The Image Processor turns off the genlock circuit using the serial to parallel shift register U33 pin 2 (VMDATA bit 22). When U33 pin 2 is set low, PAL U29 removes the VCO clock signal from sync chip U40 and replaces it with a clock from Y1 (60 Hz operation) or Y2 (50 Hz operation). X-ray Disable (VMDATA bit 23) is also set HI and travels to the Generator to override all X-ray on commands. Genlock adjustment occurs by turning C89 on the Video Switching PCB until LED’s DS1 and DS2 both illuminate equally. In this condition, the VCO output at TP33 should be running at approximately 25.8 MHz and the voltage at TP38 (correction voltage) should be approximately 2.5 volts.

50/60 HZ VIDEO CONTROL The system configuration in the Workstation software controls the 50/60 Hz video operation. The Workstation software sets the condition of the serial to parallel shift register U33 pin 3 (VMDATA bit 21). In the 60 Hz configuration U33 pin 3 is set low, in the 50 Hz configuration U33 pin 3 is set high. The signal from U33 pin 3 travels to the sync generator U40 pin 2 that sets the sync generator to run in the 50 Hz or the 60 Hz mode. The signal from U33 pin 3 also travels to pal U29 pin 5 that enables either crystal Y1 for 60 Hz timing or crystal Y2 for 50 Hz timing. Y1 and Y2 are both disabled when the Genlock circuit is turned on. Only in the stand-alone condition, when no camera video is present from the CCD camera, is timing from Y1 or

MINI6600TM Imaging System Service Manual - Workstation Imaging System Y2 enabled. The signal from U33 pin 3 also travels to the Image Processor PCB where it is utilized to configure the scan converter circuit for 50 or 60 Hz operation.

SCAN CONVERTER PCB SCAN CONVERTER TIMING CONTROL The Scan Converter PCB receives the following timing signals from the Image Processor PCB: HDRV VDRV FIELD PIXCL. These signals enter the Scan Converter PCB via connector J2 and travel to the timing generator U22 and U24. The timing generator produces the address and control signals used by the Scan Converter PCB to convert the digital video signal from the interlace format to the high rate progressive scan format. • • • •

VIDEO MEMORY The Scan Converter receives the left and right digital interlaced video data from the Image Processor PCB via connector J2. The digital interlaced video data goes into the left and right video memory. The digital, high rate, progressive scan video data is read out from the left and right video memory and is sent to the left and right D/A converters U20 and U21.

VIDEO OUTPUT D/A converters (U20 and U21) convert the high rate progressive scan video data into the left and right analog video signals that travel to the Fast Scan monitors. Monitor the analog video signals from the D/A converters at TP4 (left video) and TP1 (right video). The left and right video signals exit the board at J5 and J4 and travel out of the Electronics Box at J8 (left video) and J7 (right video) to the Fast Scan Monitors.

MINI6600TM Imaging System Service Manual - Workstation Imaging System SCAN CONVERTER TEST 1. Power up the system and press the “TEST PATTERN” key on the keyboard. 2. Press the L>R key on the front control panel. The gray scale test pattern should appear on both monitors. 3. Verify that the test pattern on both monitors is crisp and well defined. 4. Verify that pixels in the test pattern do not flicker.

Ambient Room Light Sensor Monitor PCB

High Scan Brightness/Contrast Control PCB.

FAST SCAN MONITORS CONTRAST AND BRIGHTNESS CONTROL Brightness and contrast of the Fast Scan monitors are controlled by the left and right contrast and brightness pots located behind the top cover of the Workstation as shown in FIGURE 7. Brightness and contrast pots R2 and R1 for the left monitor, and R4 and R3 for the right monitor, are supplied with +5 volts on one side and DC common on the other. The control voltage is obtained from the wiper on each pot. The control voltage travels to the High Scan Brightness/Contrast Control PCB

Brightness and Contrast Controls

FIGURE 7 - COMPONENT LOCATIONS

MINI6600TM Imaging System Service Manual - Workstation Imaging System where it is summed with portions of the voltage from the ambient room light sensor. The resultant voltage is applied to pins 3, 5, 10, and 12 of U2 on the High Scan Brightness/Contrast Control PCB where it is amplified. The drive-voltages exit the High Scan Brightness/Contrast Control PCB at connector P4 and go to the monitors.

CONTRAST AND BRIGHTNESS ADJUSTMENT Set up the monitor contrast and brightness in normal room light conditions 1. Turn off AUTO HISTO. 2. Display the video test pattern by pressing the TEST PATTERN button on the keyboard and then pressing the L>R button on the front of the Control Panel. 3. Adjust the contrast and brightness pots R1 - R4 to minimum. 4. Adjust the brightness pots R1 & R3, until the raster lines on both monitors are barely visible. 5. Adjust the contrast pots R2 & R4 so that all steps in the gray scale test pattern appear without causing the white areas of the test pattern to bloom.

NOTE: Power-on defaults: Contrast: 224 Brightness: 128

There should be no bleeding of the white part of the image. Look here to check for excessive contrast pot adjustment. All steps in the gray scale should be visable.

FIGURE 8 - GRAY SCALE TEST PATTERN

MINI6600TM Imaging System Service Manual - Workstation Imaging System AMBIENT ROOM LIGHT CONTROL The Ambient Room Light Control is provided to ad just the brightness and contrast of the monitors as lighting conditions vary. Ambient Room Light Control comes from the IR Receiver PCB located between the two monitors. The sensor consists of a photocell that provides a variable resistance, depending on the light level entering the sensor through the clear plastic window in the bezel. The sensor is supplied with +12 volts. The output voltage of the photocell goes to the resistor network R13 and R11 on the High Scan Brightness/Contrast Control PCB. Monitor the voltage from the photo cell at TP1. The photo cell voltage is summed with the voltage from the contrast and brightness pots R2 and R1 from the left monitor and R4 and R3 from the right monitor.

IMAGE PROCESSOR PCB

386 AT MOTHERBOARD

1.44MB

IDE

HD

HARD

FLOPPY

IMAGE STORAGE The Workstation comes equipped with an IDE (Integrated Device Electronics) Hard Disk Drive and a 1.44 MB Floppy Disk Drive.

DRIVE

DRIVE J17

J16

IDE Hard Disk Drive The 6600 system contains one hard disk drive with two DOS partitions. One, 10 megabyte partition (C drive), is for Workstation program storage and one, 30 megabyte partition is (D drive), for the 16 image

FIGURE 9 - IDE HARD DRIVE BLOCK DIAGRAM

MINI6600TM Imaging System Service Manual - Workstation Workstation Imaging System

storage option. The imbedded controller on the Workstation 386 Motherboard controls the IDE-type drive. Configure jumpers E1, E2 and E3 on the Communication PCB to select the drive. The hard disk drive jumpers appear below. below.

+12VDC +12VDC RTN +5VDC RTN +5VDC PIN 1

2

o o o o o o 14 o

o 1 o o o CNH1 o o o 13

JUMPER SETTING FOR CNH1 PIN 1 - 2 S HO HORTED 3 - 4 O PEN 5 - 6 O PEN 7 - 8 O PEN 9 - 10 OP OPEN EN 11 - 12 12 OP OPEN EN 13 - 14 14 SHOR SHORTED TED

N.C.

+12VDC +12VDC RTN +5VDC RTN +5VDC

BOTTOM VIEW

FIGURE 10 - FUJITSU M2684TA HARD DISK DRIVE JUMPER SETTINGS

MINI6600TM Imaging System Service Manual - Workstation Workstation Imaging System 1.44 MB FLOPPY DISK DRIVE The Workstation 386 Motherboard utilizes the 1.44 MB High Density Floppy Disk Drive (A drive) and requires a 3 1/2-inch high density floppy disk for data storage and transfer. The floppy disk drive appears in all Workstation configurations. The floppy disk drive jumpers appear below.

15

5

11

1

TOP VIEW

4321

2 4

32 34

1 3

31 33

REAR VIEW

FIGURE 11 - SONY MPF420-1 FLOPPY DISK DRIVE JUMPER SETTINGS

MINI6600TM Imaging System Service Manual - Procedures

PROCEDURES OVERVIEW

The Camera and Beam Alignment test procedure contain the following test modules: • • • • • • • • • • •

Camera Preparation Camera Focus Image Intensifier Focus Monitor and Camera Alignment Pattern Pattern Confirm Monitor Size & Linearity Camera Alignment Beam / Collimator Alignment Beam / Collimator Alignment Verification Verification Set Camera Iris and Video Gain Align and Check Rotation Indicator Verify Resolution.

Additional test modules in this section include: • • •

Entrance Exposure Test Test Accessing 6600 Controller PCB Indicated Indicat ed Vs. Actual Technique Technique Verification Verificati on

MINI6600TM Imaging System Service Manual - Procedures CAMERA AND BEAM ALIGNMENT NOTE: Any alignment variation between the four inch I.I. or the six inch I.I. appear within the procedure.

All S1 switches OFF

JB3 ON

CCD Camera Preparation 1. Re Remov move e th the e CCD CCD Came Camera ra cov cover er.. 2. Set the CCD camera camera switc switches hes and pot potent entiiometers as follows. follows. Refer Refer to figure 1. 3. Verify erify or set set a allll S1 switch switches es to to th the e OFF position. 4. Verify erify or set set the AGC/MA AGC/MAN N switch switch (S2) in in the MAN position. 5. Verify erify JB3 is ON ON and and JB1 JB1 is in the the NORma NORmall position. If you replace the CCD camera: NOTE: The potentiometer’s in the next 2 steps are factory set and do not require any adjustment. adjustment.

JB1 NOR

Set AGC = MAN Black Level Leave factory setting

Manual Gain (R74) AGC Gain Leave factory setting Sharpness Leave Factory Setting

Gamma Leave Factory Setting

AGC/MAN switch AGC

MAN R74 Manual Gain

(factory)

(factory)

Sharp harp Gamma

1. Verify that the Sharpness Sharpness potentio potentiomete meterr, R110, is positioned as shown in figure 1. 2. Verify that the Gamma Gamma potentio potentiomete meter, r, R105, is positioned as shown in figure 1.

R110

R105

Figure 1 - Camera Switches & Potentiometers

MINI6600TM Imaging System Service Manual - Procedures Camera Focus WARNING: This procedure produces X-rays. Take appropriate precautions. 1. Install the Wisconsin mesh tool on the Image Intensifier. 2. Fully open the camera iris (turn clockwise). NOTE: The iris adjustment is a friction-lock adjustment. Do not loosen the iris set screw. 3. Loosen the focus set screw (refer to figure 3). 4. Make an AUTO mode exposure. Adjust the focus ring for optimum focus. 5. Lightly tighten the focus set screw. camera1.eps

CAMERA PCB C-MOUNT SCREWS (2)

CAMERA POSITION POTENTIOMETER

ROTATION MOTOR

MANUAL IRIS ADJUSTMENT

P1

LENS FOCUS RING

Figure 2 - Camera Assembly

TORX SCREWS FOR LENS ASSEMBLY


TORX SCREWS FOR LENS ASSEMBLY(3)

CCD CAMERA PCB

Figure 3 - Camera Assembly, Exploded View

CAMERA C-MOUNT SCREWS (2)

FOCUS RING

FOCUS SET SCREW

LENS ASSEMBLY

MINI6600TM Imaging System Service Manual - Procedures Image Intensifier Focus WARNING: This procedure produces X-rays. Take appropriate precautions. 1. Remove the monoblock cover. 2. Adjust R1 (I.I. focus pot on the Image Intensifier power supply, refer to figure 4) to obtain the best image focus. If necessary, readjust the camera focus ring and repeat this adjustment. I.I. FOCUS POT R1

COLLIMATOR SET SCREW (NOT VISIBLE IN THIS VIEW)

Figure 4 - Monoblock Assembly with Collimator and I.I. Power Supply

MINI6600TM Imaging System Service Manual - Procedures Dual Mode I.I. Power Supply and Collimator Alignment NOTE: Alignment of the six inch collimator must be accomplished before installing and aligning the four inch slide collimator. FRONT VIEW

M2

M1

N

M2

G1

M1

N

M2

G2

G1 - Edge Focus G2 - Overall Focus

M1

N

G3 M2 - 4" Field M1 - No Adjustment

N - 6" Field G3 - Size Figure 5 - I.I. Power Supply Refer to figure 2 in the parts manual update for the location of the II power supply. 1. Attach your beam alignment tool to the II face plate. 2. Adjust G3, N until the image is fully within the circular blanking. 3. Center your beam alignment tool. 4. Rotate the camera through 360 degree’s marking the center of the image every 90 degrees. 5. Center the image within these four marks by moving the camera.


6. Use your service disk to select the setup options menu. Select access level 2 (service). Then select the monitor and camera alignment pattern. 7. Adjust the image size and focus to fit within the outer ring of the workstation beam alignment pattern utilizing G3, N and G2, N. 8. Loosen and center the variable 6 inch collimator base, if necessary and secure. 9. Thread the four inch collimator jam nut to the variable 6 inch collimator until it stops and position the four inch collimator on the 6 inch variable collimator until it stops and the handle can extend through the monoblock cover. 10. Unthread the jam nut up against the four inch collimator and hand tighten. The compression made between the jam nut and the slide collimator will secure the slide collimator to the 6-inch variable collimator and maintain it’s position. 11. Remove the optic switch from the slide collimator. This will place the system in the 4 inch mode. 12. Fluoro and center the beam alignment tool. 13. Place an object in the optic switch field. Loosen the three slide collimator adjusting screws and center the slide collimator. Tighten the screws and apply wicking style loctite 290 (88-199968-00) to the slide collimator screws. 14. Install the optic switch. 15. Adjust the four inch size and focus pots utilizing G2, M2 and G3, M2 to the outer ring of the workstation alignment pattern. 16. Verify that clipping does not occur throughout the entire 360 degree’s of camera rotation.

MINI6600TM Imaging System Service Manual - Procedures Monitor and Camera Alignment Pattern 1. With the system booted, press the SETUP OPTIONS key on the Workstation keyboard. The Setup Options menu will appear. 2. Insert the OEC Service Disk into the disk drive. 3. Select Access Level 2 (Service) and press the ENTER key. 4. The Service Options menu will appear. 5. Enter the Video Calibration sub-menu. Select Monitor and Camera Alignment and press the ENTER key. Notice the Monitor and Camera Alignment Pattern, shown in figure 6, on both monitors. This pattern appears at various times throughout this procedure. 6. If the monitors do not show a linear and round image as shown in figure 6, it may be necessary to adjust the size, centering, and linearity of the monitor. Proceed to the next portion of this procedure, Confirm Monitor Size & Linearity.

"B"

5" 5"

"A"

Figure 6 - Monitor and Camera Alignment Pattern with Image Size Measurements


Confirm Monitor Size & Linearity 1. Adjust the left and right monitors correctly by measuring the following size specification (refer to figure 6): 5" (± 0.125) from the center to the horizontal & vertical edges.

•

NOTE: With a curved CRT surface the measuring viewpoint must be perpendicular to the monitor screen. 2. Also verify the vertical linearity of the monitors by measuring the largest distance between the vertical lines (A), and the smallest distance between the vertical lines (B). The distance should be approximately 1 inch between each line. Calculate the Linearity Error using the following formula: A – B X 100% A

Linearity error must be less than 10%.

NOTE: Proceed to the Camera Alignment portion of this procedure if the monitors are within specifications. Continue to Step # 3 if the monitors are within specifications. 3. Remove the rear cover of the Workstation (8 screws) then slide the monitor cover off by pulling it straight out to the rear of the unit. 4. Use the controls, shown in figure 7, and adjust the monitors.

MINI6600TM Imaging System Service Manual - Procedures NOTE: The following adjustments are interactive. VERTICAL VLIN - R10 VSIZE - R7 VCENT - R17

HORIZONTAL HLIN (No Adjustment) HSIZE - L1 HCENT - R57 (Phase)

Brightness Adjustment Contrast Adjustment R3

R4

V CENT VLIN

5. Set the Vertical Linearity Pot (R10) so that the Linearity Error is less than 10%. 6. Adjust the Vertical Size pot (R7) and Horizontal Size coil (L1) on the Monitor PCB for 10 ± 0.15 inches measured perpendicular to the CRT surface. 7. Adjust the Vertical Center pot (R17) and the Horizontal Phase pot (R57) to center the Monitor and Camera Alignment Pattern.

VFRQ V SIZE

H CENT

*

HFRQ

* SUB CONT

Monitor Adjustment Access Holes DO NOT ADJUST

*

*

H SIZE

Monitor Side Veiw For Monitor Adjustment refer to IMAGE SYSTEM CALIBRATION Monitor PCB Focus G2 Sub Brightness

* Monitor Adjustment Access Holes DO NOT ADJUST

*

Figure 7 - Monitor Adjustment Controls Monitor Bottom View Adjustment access holes are located in the monitor mounting plate

MINI6600TM Imaging System Service Manual - Procedures Camera Alignment WARNING: This procedure produces X-rays. Take appropriate precautions. NOTE: Perform the Camera Alignment with the imaging chain in a vertical position. However, it does not matter if the X-ray source or image intensifier is UP. Change the position, as necessary, to facilitate the alignment. 1. To remove circular blanking from the video: Enter Access Level 2 Select Video Calibration Select Monitor/Camera Alignment. 2. Loosen the collimator set screw (refer to figure 4). Adjust the diameter of the X-ray field by turning the threaded collimator clockwise or count erclockwise. Screw the collimator in so that the entire Image Intensifier surface is visible when you take X-rays. If necessary, loosen the four nuts holding the collimator base (figure 4) and position the assembly to remove any clipping of the image. 3. If clipping is still present or you have a misaligned image on the CRT, loosen the two screws holding the Camera PCB to the C-mount of the Lens Assembly and change the position of the Camera PCB (refer to figure’s 2 and 3). Access the two screws by arranging the Lens Assembly disk and the Camera PCB disk such that the access holes align. Lightly tighten the two screws. This adjusts the alignment of the CCD sensor to the lens. 4. Install the beam alignment template on the Image Intensifier (refer t o figure 8). Remove the 3 screws (4 inch I.I.) or 4 screws (6 inch I.I.) securing the I.I. guard to the I.I. You may be able to use these same screws to attach the beam alignment template to the I.I. 5. Take an X-ray in the AUTO mode. Observe the outside edges of the image in relation to the scale

MINI6600TM Imaging System Service Manual - Procedures generated by the beam alignment template. (Ignore the digitally generated rings and tick marks that are part of the Monitor and Camera alignment pattern.) 6. Adjust the beam alignment template horizontally and/or vertically to center the image around the template. Count the template tick marks to ensure exact centering of the image. To adjust the beam alignment template loosen the two thumb screws.

Figure 8 - Beam Alignment Tool, OEC P/N 00-879272 7. Rotate the camera to each of four angles (0, 90, 180 and 270 degrees) and place a felt-tip pen mark at the center of the target for each angle. Mark the center of the pattern created by the four marks. 8. Loosen the three torx screws and one ground-lug torx on the Camera Mounting Ring that holds the Lens and Camera assembly to the Image Intensifier (refer to figure’s 2 and 3). Shift the Lens and Camera assembly position to center the bull’s-eye on the mark. Lightly tighten the screws and repeat this step until the template’s bull’s-eye is on the center mark. 9. Rotate the camera throughout its range and verify less than 0.05 inch movement about the center of the bull’s-eye. Estimate the movement using the 0.1 inch grid ticks on the beam alignment template. If necessary, rotate the camera, mark the screen and readjust the camera mount. 10. Tighten all three camera mount screws and the ground screw and as you rotate the camera verify that the bull’s-eye remains in one position on the screen. 11. Observe the template’s bull’s-eye with respect to the center of the digitally generated Monitor and Camera alignment pattern crosshair. If incorrectly aligned, loosen the two Phillips-head screws that hold the camera C-mount to the Camera PCB and shift the Camera PCB to center the template’s bull’s-eye on the digital crosshair. Tighten the two Camera PCB screws.


4-inch Slide Collimator

Figure 9 - Monoblock with 4 inch and 6 inch Collimators

MINI6600TM Imaging System Service Manual - Procedures Beam / Collimator Alignment WARNING: This procedure produces X-rays. Take appropriate precautions. 1. (Four-inch I.I.) Loosen the four nuts holding the collimator base to the Monoblock and proceed to step two. (Six-inch I.I.) Remove the 4 inch slide collimator by (refer to figure 9): a.) Remove bolt securing R1 to bracket b.) Removing the four bolts securing the I.I. power supply to the monoblock c.) Lift I.I. power supply off the monoblock assembly d.) Loosen the slide collimator set screw e.) Unscrew the slide collimator from the 6-inch collimator f.) Secure I.I. power supply to the monoblock assembly. 2. Unscrew the collimator (counter-clockwise) until it produces an X-ray field as close as possible to the size of circular blanking (inner-most ring on the Monitor and Camera alignment patte rn figure 6). 3. Press ESC four times to leave the Monitor and Camera alignment mode and restore the circular blanking. 4. Lightly tighten the collimator set screw. This is important to ensure accurate positioning. 5. Observe the position of the X-ray field with respect to the inner-most alignment pattern ring (circular blanking). Adjust the collimator position to center the X-ray field around the ring. 6. Tighten the four collimator base nuts. 7. If necessary, repeat this process until you have centered the X-ray field on the inner-most Monitor and Camera alignment ring and the field size matches the inner-most ring (with the collimator set screw tightened). 8. Loosen the collimator set screw and screw the collimator in (clockwise) exactly three complete turns. 9. Lightly tighten the collimator set screw. 10. While making X-rays, rotate the camera from stop to stop. Verify that no image clipping occurs (e.g., collimator edge or phosphor showing in the image).

MINI6600TM Imaging System Service Manual - Procedures Beam / Collimator Alignment Verification (Short Method) WARNING: This procedure produces X-rays. Take appropriate precautions. NOTE: Perform the Beam Alignment with the imaging chain in a vertical position and the X-ray source UP. 1. Place a small identifier item (e.g., a dime) on the alignment tool near the top of the tool (nearest the C). This provides an orientation reference for both the film and fluoro image. 2. Rotate the camera to place the template axis with the identifier at the top of the screen (refer to figure 10). 3. Place a loaded film cassette into the alignment tool. Select ONE SHOT and one LED of averaging. 4. Expose and process the film and make a thermal print of the image (if applicable).

Top of image & film Orientation mark

Figure 10 — Image and Film Orientation


5. Compare the film image to the thermal printer image (if applicable) or the image on the monitor. There should be ≤ 0.1 inch tick mark or one tick mark difference between the film and the thermal printer or monitor images (refer to figure 11). 6. Adjust the collimator by loosening the set screw (refer to figure 4) and turn the collimator clockwise to increase the size of the image or counter-clockwise to decrease the size of the image. Take another film exposure to view the beam alignment accuracy. 7. The 6-inch I.I. systems will also require a 4-inch collimated film exposure. By adjusting the 6-inch collimator the 4-inch collimator well be properly positioned when you: a.) Remove the I.I. power supply from the monoblock assembly b.) Screw the slide collimator onto the 6-inch collimator until it contacts th e collimator blockand then loosen until the slide collimator is parallel with the monoblock. Refer to figure 8 for collimator location c.) There are no size adjustments to the 4-inch collimator. However, there are positioning adjustments. The collimator should be adjusted so that there is equidistance between the outer edge of the image and the center of the beam alignment tool. Adjust the X axis and the Y axis to center the field to the beam alignment tool. d.) Place a loaded film cassette into the alignment tool. Select ONE SHOT and one LED of averaging. e.) Tighten slide collimator set screw. 8. Annotate the thermal print (if applicable) and radiographic film(s) with the system serial number, hospital name, date and engineer’s name. Attach the thermal print (if applicable) and film to the PM form and mail to: OEC Medical System, Inc. Attention: Technical Support 384 Wright Brothers Drive Salt Lake City, Utah, 84116


2 2

DESIRED

1 MINIMUM

DESIRED 1 MINIMUM

COLLIMATOR

2

COLLIMATOR

1

1

2

2

R O T A M I L L O C M U M I N I M

1

ACCEPTABLE

1

1

2

R O T A M I L L O C M U M I N I M 1

2

2

Figure 11 - Four-Inch and Six-inch I.I. Beam Alignment Film Accuracy

ACCEPTABLE

MINI6600TM Imaging System Service Manual - Procedures Beam Alignment Verification (Long Method) WARNING: This procedure produces X-rays. Take appropriate precautions. NOTES: Perform the Beam Alignment with the imaging chain in a vertical position and the X-ray source UP. When measuring film and images, estimate and record all values to the nearest 1/100th of an inch (e.g., 1.73). When measuring film with a penumbra (a space of partial illumination around the outer edge) measure to the center of the penumbra. 1. Place a small identifier item (e.g., a dime) on the alignment tool near the top of the tool (nearest the C). This provides an orientation mark for the film and fluoro images. 2. Rotate the camera to place the template axis with the identifier at the top of the screen. 3. Place a loaded film cassette in the alignment tool. Select ONE SHOT and one LED of averaging. 4. Expose and process the film. Make a thermal print of the image and attach the print to the processed film. 5. Record the film and left-monitor image X1, X2, Y1, and Y2. Note axis definitions in figure 12. Top of image & film Y1 Orientation mark

X2

X1

Y2

Figure 12 — Film and Image Axis definition

MINI6600TM Imaging System Service Manual - Procedures 6. Calculate and record the difference between film and image X1 and between film and image X2. 7. The collimator will need additional adjustment if the difference between the two values just calculated is significant (>0.03 inch) about the circular blanking. Re-adjust the collimator position as described in the previous steps. 8. Calculate and record the difference between film and image Y1 and between film and image Y2. 9. The collimator will need additional adjustment if the difference between the two values just calculated is significant (>0.03 inch) about circular blanking. Re-adjust the collimator position as described in the previous steps. 10. Calculate and record the sum of DIFF X1 and DIFF X2. Multiply that value by 1.1 (to obtain adjusted X) and verify a result of less than or equal to 0.47 inch (3% SID). For internal OEC purposes, this beam alignment procedure attempts to obtain a value of 0.29 inch (±0.03 inch). 11. Calculate and record the sum of DIFF Y1 and DIFF Y2. Multiply that value by 1.1 (to obtain adjusted Y) and verify a result of less than or equal to 0.47 inch (3% SID). For internal OEC purposes, this beam alignment procedure attempts to obtain a value of 0.29 inch (±0.03 inch). 12. Calculate the sum of the adjusted X and adjusted Y offsets and enter the values on t he next page. Verify a result of less than or equal to 0.63 inch (4% SID).

Film X1 in. Image X1 in. Diff X1 in.

Film X2 in. Image X2 in. Diff X2 in. Adj X =

Film Y1 in. Image Y1 in. Diff Y1 in.

Film Y2 in. Image Y2 in. Diff Y2 in. Adj Y =

Diff X1 + Diff X2 (mag factor) ( < 0.47 in.) 3% SID

in. × 1.1 in.

Diff Y1 + Diff Y2 (mag factor) ( < 0.47 in.) 3% SID

in. × 1.1 in.


Total beam over scan: Adjusted X + adjusted Y = _________ in. ( < 0.63 in.) 4% SID 13. Annotate the and radiographic film(s) with system serial number, hospital name, engineer’s name and date and attach the film(s) to PM form and mail to:

OEC Medical System, Inc. Attention: Technical Support 384 Wright Brothers Drive Salt Lake City, Utah, 84116

MINI6600TM Imaging System Service Manual - Procedures Window Placement Verification WARNING: This procedure produces X-rays. Take appropriate precautions. 1. Set switches S1-1 through S1-4 on the 6600 Controller PCB to the following condition: S1-1 S1-2 S1-3 S1-4

OFF ON ON OFF

Figure 13 - Switches S1-1 through S1-4 on 6600 Controller PCB


2. Take an X-ray and verify the ABS window outline appears approximately centered within the 5 cm alignment box on the beam alignment tool.

NOTE: A vertical offset of about 20% of the screen size indicate improper video configuration (50 Hz/60 Hz) in the generator configuration menu.

3. Restore switches S1-1 through S1-4 to their OFF position.

4. Remove the beam alignment tool from the Image Intensifier.

MINI6600TM Imaging System Service Manual - Procedures Set Camera Iris and Video Gain WARNING: This procedure produces X-rays. Take appropriate precautions. NOTE: A 1.5mm Allen wrench and a 1/16th-inch flat blade screwdriver are needed to adjust the camera iris and video gain. 1. Install the X-ray tube cover. 2. Place one 1 mm copper filter over the Image Intensifier. 3. Take an AUTO-NORMAL X-ray and observe the technique displayed on the left monitor. 4. Adjust the camera iris (see figure 2) to obtain these tracking specifications: (Any of the µA readings associated with 65 kV or 70 kV is acceptable). TRACKING, 1 mm COPPER FILTER FOUR INCH IMAGE INTENSIFIER 70 KVP ± 0 KVP SIX INCH IMAGE INTENSIFIER

65 KVP ± 0 KVP

Refer to the Accessing 6600 Controller PCB Test Points in this section to gain access to the test point listed in this step. Connect your oscilloscope between VID TP 28 and GRD TP40. Set the oscilloscope controls to: negative trigger 10 µs / div. horizontal time base 0.2 V / div. vertical amplifier (trigger on video line if available) NOTE: If you have an oscilloscope with the delay feature set the trigger to Field, switch the mode to ALT and set the time base to 10µs. Adjust the delay setting to 8ms and then switch the mode to B. This will give you a horizontal line that is approximately in the center of the image.

MINI6600TM Imaging System Service Manual - Procedures 5. With the 1 mm copper filter over the Image Intensifier, take an AUTO-NORMAL X-ray. 6. Verify a horizontal sync pulse amplitude of 0.29 V ± 0.05 V as shown in figure 14.

NOTE: You can access the manual gain potentiometer, R74, in step 8, by arranging the Lens Assembly disk and the Camera PCB disk such that the access holes align. Refer to figure 2 for the disk locations. Align the access holes by rotating the camera. 7. Adjust the camera’s Manual Gain potentiometer, R74 (shown in figure 1), to obtain 0.35 V video above blanking level as shown in figure 14. Since noise occurs in vid eo, use the middle of the noise to make the measurement. 8. Remove oscilloscope leads. Remove the copper filter from the Image Intensifier.

0.35 V (to m iddle of no ise)

0.29 ± 0.05 V

Figure 14 — Horizontal Sync Pulse and Video Amplitudes

MINI6600TM Imaging System Service Manual - Procedures Align and Check the Rotation Indicator

WARNING: This procedure produces X-rays. Take appropriate precautions. NOTE: Never twist the upper part of the camera assembly when manually rotating the camera. Instead, turn the plate nearest the optics assembly (with the rubber-toothed belt). Otherwise, the Camera PCB may twist on the C-mount thereby destroying the optical alignment.

PIVOT BRACKET, TOP DISK AND BOTTOM DISK REMOVED FOR CLARITY.

Figure 15 - Camera Orientation for Step 1 1. Rotate the camera until until the long long axis is in physical physical alignment alignment with the C-arm and the the Camera PCB, with the power and video entry cable attached, directed away from the C-arm (refer to Figure 15). This represents the middle of the camera’s rotational range. 2. Turn off syste system mp pow ower er..

MINI6600 MINI 6600TM Imaging System Service Manual - Procedures NOTE: The camera position is monitored by a 10kΩ, 10-turn variable resistor. 3. Lift up on the rotation rotation pot far enough enough to disengage disengage the rotation rotation pot gear from the motor motor rotation rotation gear. gear. Rotate the camera rotation pot until it reaches a rotation limit. Use the rotation pot gear set screw to count 5 complete rotations in the opposite direction. This will position the rotation pot and will represent the middle of the camera rotation. Reposition the rotation pot to engage the rotation pot and motor gears. 4. Another approach approach to positionin positioning g the rotation pot correct correctly ly is by disconnecti disconnecting ng P3 from the 6600 Controller PCB. Connect a DMM to measure the resistance between pins 2 and 3 of the camera rotation potentiometer. Verify a reading of 5.00 kΩ ± 0.05 kΩ. 5. Turn on system system pow power er.. 6. Make Make an exposure exposure and observe the vertical vertical and horizonta horizontall orientation orientation of the image, image, then terminate terminate the exposure. 7. Without making making X-rays X-rays rotate rotate the camera camera and observe the indicator indicator arrow arrow as it rotates rotates around the image perimeter. Discontinue rotation and observe where the arrow is pointing on the image. 8. Make Make another exposur exposure e and verify verify that the point indicated indicated previo previously usly is now at the top top of the monitor in the new image. 9. Verify that while while making an exposur exposure e the image and the rotation rotation indicator indicator remains remains aligned aligned with each other as you rotate the camera. Verify Resolution WARNING: This procedure produces X-rays. Take appropriate precautions. 1. Refer to figure 16 and place the converging line pair tool on the image intensifier. 2. Rotate the camera to display the tool on the Workstation monitor at a 45 degree angle off-vertical.

MINI6600TM Imaging System Service Manual - Procedures TOP VIEW OF

TOP VIEW OF IMAGE INTENSIFIER

IMAGE INTENSIFIER

OR

Figure 16 - Proper Orientation of Line Pair Tool on Face of Image Intensifier Tube. 3. Take an X-ray X-ray.. Verify resolution is equal equal to or better than: than: FIELD SIZE

60 Hz MIN lp/mm

50 Hz MIN lp/mm

6”

2.5mm

2.2mm

4”

3.0 mm

2.6 mm

4” Mag.

3.5 TBD

3.2 TBD

NOTE: Resolution measurement is subjective even when using the converging line pair tool. Shift the tool or rotate the camera, as necessary, to minimize the effects of moiré (wavy) pattern interference in the region of interest. int erest. Generally, read the tool t ool when displayed at a t an angle of o f approximately 45° on the left lef t monitor. OEC measures the resolution as follows: observe the converging lines (from thick to thin) until approximately 50% of the converging line pairs disappear. If the line pairs disappear temporarily and 50% (or more) re-appear, observe the pattern until 50% of the line pairs disappear.


Entrance Exposure Test WARNING: This procedure produces X-rays. Take appropriate precautions. 1. Insta Installll the the X-ra X-ray y tube tube cove coverr. 2. Position the the 15 cc dosimeter ion ion chamber chamber 16 cm (6.3”) (6.3”) below the output output port of the skin spacer spacer (X-ray (X-ray tube cover). It may be easier to place two 1mm copper filters on the I.I. and place a 5.5 inch block on the copper filters. Then place the ion chamber on the block. 3. Center the ion chamber chamber in the beam with full beam coverage coverage by by taking an exposure exposure of the chamber chamber and verifying that all edges of the chamber appear in the image. 4. Shield Shield the image image inten intensifie sifierr with a lead lead apron apron or coppe copperr filters. filters. 5. Select MANUAL MANUAL mode and increase increase the technique to maximum. maximum. During a fluoro fluoro exposure exposure,, measure and record the corrected exposure rate. Verify a reading of 0.89 R/minute or less. 6. Select AUTO AUTO-NORMAL -NORMAL mode. mode. During a fluoro exposure, exposure, verify verify a reading of 0.89 R/minute or or less. 7. Select AUTO AUTO-OSTEO/PED -OSTEO/PED mode. mode. During a fluoro exposure, exposure, verify verify a reading of 0.89 0.89 R/minute R/minute or less. less.


Accessing 6600 Controller PCB Test Points NOTE: To access test points on the 6600 Controller PCB remove the EMI shield from the board. 1. Turn the system off and unplug the power cord from the wall outlet. 2. Remove the outside cover from the right side of the workstation and locate the Controller PCB and its shield (refer to the Illustrated Parts section for location). 3. Remove the ten Keps nuts that hold the shield in place. 4. While holding the shield, reach behind it and unplug the audio alarm from the Controller PCB. 5. When replacing the shield, be sure that you plug the alarm speaker back into the Controller PCB.


Indicated Vs. Actual Technique Verification WARNING: This procedure produces X-rays. Take appropriate precautions. NOTE: Complete this procedure only if an error exists between the indicated kVp on the monitor and the indicated kVp on the non-invasive kVp meter. As of this writing the values provided below are correct, however, they are subject to modification if technique values in the look-up tables change in the future.

1. Set the X-ray technique to maximum in MANUAL mode. Place a copper filter or a lead sheet over the I.I. 2. While making X-rays, use a DMM to measure and record the DC voltage at TP25 (kV Drive), on the 6600 Controller, with respect to ground at TP14. Verify a reading of +7.20 VDC to +7.80 VDC. 3. While making X-rays, measure and record the DC voltage at TP15 (µA Drive). Verify a reading of +4.70 VDC to +5.10 VDC. 4. Reduce the technique to 58 kV and 35.2 µA as indicated on the left monitor. 5. Take an X-ray and verify a left monitor indication of 58 kV and 35.2 µA.

MINI6600TM Imaging System Service Manual - Procedures 6. While making X-rays, use a DMM to measure and record the DC voltage at TP25 (kV Drive), on the 6600 Controller, with respect to ground at TP14. Verify a reading of +5.57 VDC to +6.03 VDC. 7. While making X-rays, measure and record the DC voltage at TP15 (µA Drive). Verify a reading of +1.69 VDC to +1.83 VDC. 8. Reduce the technique to minimum. 9. Make X-rays and verify a left monitor technique indication of 40 kV and 19.6 µA. 10. While making X-rays, use a DMM to measure and record the DC voltage at TP25 (kV Drive), on the 6600 Controller, with respect to ground at TP14. Verify a reading of +3.84 VDC to +4.16 VDC. 11. While making X-rays, measure and record the DC voltage at TP15 (µA Drive). Verify a reading of +0.94 VDC to +1.02 VDC. 12. Remove the copper filter from the X-ray tube. 13. Set the technique to maximum in MANUAL mode. 14. Make X-rays and verify a left monitor indication of 75 kV and 98.0 µA.

MINI6600TM Imaging System Service Manual - Procedures 15. Replace the 15 cc ion chamber with the non invasice kVp meter. Select the Mobile Filter pack sensor. Run a Divider battery check and then turn the Divider switch to “RUN.” 16. While making a maximum technique X-ray, record the non invasive kVp meter reading. Verify a reading between 72.0 kVp to 78.0 kVp. 17. Remove the non invasive kVp meter and dosimeter.

NOTE: There are a number of possibilities if the actual and indicated technique’s disagree. They are: •

An incorrectly set Camera iris. Repeat the Set Camera Iris and Video Gain procedure

•

The values used in this procedure have changed. Contact Technical Support for updated information.

•

There is a hardware or software problem requiring trouble-shooting:

If:

the voltage readings are incorrect

Then:

reload the EEPROM Data (Refer to the C-Arm Software section of the Service Manual)

If:

the voltages are still bad after loadin g the EEPROM

Then Either:

you have corrupted data on the hard drive. An indication of corrupted data would be a checksum error once you produce X-ray’s. In addition, you may want to view the Generator Configuration screen and ensure that the ChkPts: a55a 5aa5 is displayed. If not, you have corrupted software on the hard drive. Replace the software.


the EEPROM chip is faulty or the 6600 Controller PCB is faulty

If:

the voltages are correct after reloading the EEPROM and the output is still incorrect

Then:

replace the monoblock.

MINI6600TM Imaging System Service Manual - Appendix

APPENDIX PCB LAYOUT Aux. Interface PCB, P/N 00-876504

2

1

C

A

D

B

E

MINI6600TM Imaging System Service Manual - Appendix Test Point Locations, Aux. Interface PCB Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16

Signal Name +12 V1 +5 V GND GND GND +12 V PSGND GND -12 V VIDSTAB MFRXD MFTXD X-RAY LAMP XRAYINH -5 V +5V

Location A1 D1 B2 E1 C1 E2 A1 B1 A2 C1 D1 D1 E1 C1 A1 D1

Position 1 to 2 2 to 3 2 to 3

Location D2 D1 C1

Jumper Configurations Jumper E1 E2 E3*

*NOTE: Select voltage for X-RAY ON LAMP.

MINI6600TM Imaging System Service Manual - Appendix 4th Gen. Communications PCB, P/N 00-872127

1 P 5 6 C

D N G

3

4 P T

3 3 U

+

+

R 1 5

2 P

4 6 C C 5 2

C 6 3

8 1 R 2 3 U

E E 7 8

+

2 6 C

C 6 1

C 5 1

3 3 U X

5 2 U C 4 5

2

C 3 4

4 2 R

0 3 U 5 E

R 1 3

R 1 2

C 6 0

C 5 9

C 5 8

9 2 U X 9 1 R

9 2 U C 4 2 U 4 4

C 4 9

2 2 C 1 2 C

4 U

1

1 P T

A

C 3

2 C

1 C

C 5 7

C 5 6

G

5

4 2 U

0 1 E

9 E

C 5 5

7 3 U

3 2 R

+ 2 E

9 1 U

C 5 4

6 3 U

) ( - 7 2 1 2 7 8 - 0 0 Y S S A B C P S N O I A T C I N U M M O C C N I S C I N O S A I D C E O

7 2 U

1 Y 6 2 U

D N G 3 P T

E 1

C 4 7

G

C 4 3 7 1 U

8 1 U

3 5 C

4 3 U

X

6 1 U

0 2 U

C 3 7

2 4 C

C 4 6

1 2 R

5 R

1 4 C

4 1 U

5 1 U

0 4 C

9 3 C 8 3 C

3 1 U

2 1 U

C

1 2 U 3 3

0 2 C 9 1 C 3 U C 9

8 1 C 2 U

C 7

7 1 C 6 1 C

1 U

4 R 2 2 R

9 U

C 3 2

C 3 6

9 2 C 8 2 C

7 2 C 6 U

6 2 C

5 2 C 4 2 C

4 1 C

5 P

R

3

5 1

C

D

8 3 U

1

4 P

2 P T

2 1 C 6 1 R

2 R

1 R

9 4

7 1 R

3 P

1

4 1

E

F

G

C 3 5

D N G

3 1 C 1 1 C

C 1 5

6 2

C

0 3 C 7 U

1 3 C 8 U

C 6

4 C

C 1 0

B

R 8

+

C 8

D N G

R 9

8 2 U G + 3 2 U 3 E

1 1 U C 2

R 1 0

C 4 8

0 1 U 5 U 3

R 1 1

G

7 R

0 2 R

4 E R 6

2 U X 2 2 U

C 5 0

1 3 U

6 E +

R 1 4

5 3 U

H


Jumper Table, 4th Gen Communication PCB Select the appropriate jumper block setting for E1, E2, E3 (layout location B4) by connecting the center post to the terminal as indicated in the next table. System Motherboard Type & Disk

E1

E2

E3

Location

386 (AMI BIOS) with IDE disk

+

+

G

E2

During the manufacturing process, you select the remaining jumpers. The correct position settings appear for reference. E4 E5 E6 E6 E7 E8 E9 E10

|* G + |+ |* |* |* |*

*| |* |* *| *| *| *| *|

| G| G

ENABLE OPTION ROM PRINTER 256K PROM SELECT (-03) 512K PROM SELECT (-04) UART A/B TIMER COM2 COM1

Location B2 Location D3 Location B3 Location B3 Location C3 Location C3 Location B2 Location C2

MINI6600TM Imaging System Service Manual - Appendix Control Panel Processor PCB, P/N 00-876613

2

1

C

A

D

B

E

F


Test Point Locations, Control Panel Processor PCB. Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14

Signal Name GND CTS RTS +12 V LCL TXD RXD GND IR RMT GND OSC RST GND +5 V

Location B2 C2 D2 D2 F2 D2 D2 F2 F1 D1 D1 D1 C1 D1

Key Codes See the Workstation Software section for keycode information.

MINI6600TM Imaging System Service Manual - Appendix 6600 Controller PCB, P/N 00-878567 5 C P S T O

7 1 R

1 6 C

4 R

4

5 C

8 L F

5 U X

5 U

5 1 C

5 2 R 5 1 U

0 2 R C

4 2 C 4 D 1 N P T G

4 C P D 4 P T T L 9

4 2 U

0 2 R

6 C 6 U

3 2 U

* 1 T P S T R

7 1 U

6 U X

7 8 R

C N Y S V

1 R C 7 3 R 2 5

C

7 1 C

3

5 5 2 2 C U

1 R

8 U 6 1

8 R

C 4 1 R

2 D P N R T G 7 1 U

1 2 C

6 R 8 C

3 9 C

9 U X

9 U

0 2 C 9 1 U 1 9 C 2 9 C

0 1 R

2 2 R

2 1 R

2 7 C

9 R

5 R

3 1 R

4 U 4 1 P

2 5 C

1

2 U

3 1 3 C 1 U

3 R

1

R T N I _ 3 N P I T W

A

* E 9 R 1 O P T T S * B 0 A 2 T S P T D I V 4 3 R

1 2 U

2 2 0 C 2 U

1 3 R

7 5 C

4 2 R

1 4 R

3 3 R

5 4 R N O 4 M 3 P V T 3 K 4 6 C 3 N 3 U O 3 P M T A U

5 3 C 2 L F

7 9 C

2 4 R D I V _ 3 C P 3 8 M 2 P O T C

6 6 C 4 6 C

5 7 6 9 0 R R 4 4 5 C C R R R

T I 5 S 3 O P P T M A C

4 6 R

8 D 3 N P G 8 5 T A R

3 8 C

6 8 C 8 1 R 2 8 C R

9 5 6 7 R R

0 6 R

8 6 2 R 7 G C V A _ 5 N I 4 W P T

5 1 R C

2 0 D 6 4 N C P T G 9 A 6 C

3 L F

3 6 R

2 9 R

7 8 C

7 7 R

7 6 R

5 8 R

4 7 R

9 7 C 4 4 6 U 6 R

6 1 R C

3 1 R C

6 3 8 8 R R

2 4 U

5 6 R

8 4 R

0 1 1 1 R R C C

0 8 R

C

D

6 7 R

5 8 C

3 7 R 8 7 C 2 7 R

9 3 U

5 4 U

9 7 R

1 7 R 4 8 C

E

F

9 8 C 4 8 R

3 4 0 9 9 8 R R 3 2 1 1 C C R R R R

B

7 4 P T 1 9 1 8 R R C 6 4 P T

1 6 R

7 6 C

8 5 C 5 5 R

7 1 R C

2 8 C

1 7 C

4 7 1 5 6 R 5 C R R

0 4 U

8 7 R

0 8 C

2 6 R

3 6 C

3 5 2 C 7 1 2 4 1 4 5 5 5 R R R R R C K A E P _ N I W 6 2 3 5 P C T 6 5 C

F E R V 3 4 1 P 1 T 8 4 C U 5 7 C

9 5 R

7 3 U

D I 3 4 V R 9 _ 2 M P A T C

D 1 N 4 P G T A

3 4 U

1 5 C

4 3 C

0 9 R

4 5 8 C 3 U 1 R V 3 5 R

6 8 9 R R R C C C

6 4 U

2 S D 2 R C

0 7 C

8 1 C

8 2 U

C N ) I , . 0 D S 0 ( C Y 6 V 2 S 6 7 1 , 6 4 - L R 4 5 A E 8 P T C L I L 7 D O 8 E R 0 M T 0 Y C N S E O S O C A

0 3 C

7 4 C

2 3 U 9 3 P F T 0 E 0 . R 5 V +

5 6 C

D N G

7 7 C

1 T 2 R X P T T A C

8 4 C

C D 7 3 V 2 P 1 T +

3 1 P

1

6 9 C

2 3 P T

7 2 U 7 3 R

9 4 C

3 3 U

5 L F

5 9 R

C D V 4 2 4 2 P + T

9 3 C

8 3 5 5 C C

6 7 C

2 3 C

1 1 C 1 1 U

4 L 4 F 4 C

0 4 R

8 3 R

1 S D

0 3 P 1 T 9 R 4 4 R 1 3 P T

2 4 C

3 7 C

8 6 C

8

5 9 C

4 3 U

6 3 C

4 7 C

9 5 C

0 5 C

5 3 U

0 4 C

6 L F

N O Y A R X

8 4 U

1 4 C 5 4 C

7 3 C

1 L F

6 1 R

5 1 R

1 S

S T R 4 T 2 R P A T C

4 C 1 6 B C

* O R U 7 1 O L P F T

3 2 C

3 2 R

* S U * T Y * 9 2 C A D V T _ A S E R _ E R Y 1 _ V A 1 R 8 Y O P 0 A P _ 1 T X Y T P R A * T X 6 I R P 7 _ X 3 T R P 1 E T P V T 7 O 4 _ U 5 R Y D 1 A 9 P R 8 A X R 2 T U 6 2 R 1 P R T 5 D 2 0 P V L 3 T K U 8 7 N _ 8 2 W R P H S T 6 N _ 8 C 4 N 2 W 4 Y 9 P P R T S T S 9 H 2 1 U 3 U

X 2 R 6 2 2 P T R U T A C

8 T S 1 R T P A C T C 2 3 R 0 1 U 0 1 C

H N I 6 Y 1 A P T R X

2 9 D 2 N U P T G

2 1 C 2 1 U

2 R

1 E

9 1 C

4 1 C

3 1 U C

8 2 R 7 2 R

4 1 U

1 1 R

2 1 6 P 2 C

4 9 C

9 C

3 C

6 9 R

8 8 1 U X 1 U

0 6 C

1 3 C

3 C 2 D P V T 5 -

3 9 R

8 9 C

1 2 R

6 1 U

4 C 7 U

1 Y

8 2 C

G

8 8 C

0 9 C

MINI6600TM Imaging System Service Manual - Appendix Test Point Locations, 6600 Controller PCB. Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 TP20 TP21 TP22 TP23 TP24 TP25 TP26 TP27

Signal Name RST DIGITAL GND WIN_INTR LDC OSC XRAY_OVER_V XRAY_OVER_I XRAY_HV_FAULT DIGITAL GND XRAY_READY XRAY_STATUS XRAY_STANDBY XRAY_I_LIMIT DIGITAL GND UA DRIVE XRAYINH FLUORO CART CTS STORE VIDSTAB CART TX CART RX -5 VDC CART RTS KV DRIVE SWITCH NH SWITCH NL

Location C3 A3 B2 B4 B4 D4 D4 D4 B2 D4 D4 D4 D4 B4 D4 C2 C2 C2 C2 C2 D2 C3 C4 D3 D3 D3 D3

MINI6600TM Imaging System Service Manual - Appendix Test Point Locations, 6600 Controller PCB. (Cont.) Test Point TP28 TP29 TP30 TP31 TP32 TP33 TP34 TP35 TP36 TP37 TP38 TP39 TP40 TP41 TP42 TP43 TP44 TP45 TP46 TP47 TP48 TP49

Signal Name COMP_VID CAM_VID XRAYON HV INTERLOCK DIGITAL GND UA MONITOR KV MONITOR CAMERA POSIT’N WIN_PEAK +12 VDC ANALOG GND +5 V REF ANALOG GND ANALOG GND +24 VDC VREF -12 VDC WIN_AVG REST_VID WINDOW HSYNC VSYNC

Location D1 D1 E4 D3 E3 E2 E2 F1 F2 G4 F2 F3 F1 G4 G4 G3 G4 G2 G2 G3 D3 B4


DC Power Distribution PCB, P/N 00-876841

1

3

4 5 P

1 2 P T

1 P T

V 5 +

4

7 P 2

0 1

6

5 C

9 P

5 P T

5A

2 C

8 P

5

OEC-MEDICAL SYSTEMS INC. DC PWR DISTRIBUTION PCB

1 3 P T

C4

V 5 -

CB4 /F4

V 2 1 +

C3 5A

8

1

ASSY00-876841- ( )

D N G

1

3 2

6 P

2

2

A

3

2

1

1

7 F / 7 B C

CB6 /F6

V 2 1 -

4 P T

A 5

5 F / 5 B C

6

2 1

A 5

9 F / 9 B C 4 1

CR2

CR1

3 P

A 5

8 F / 8 B C

1 F / 1 B C

A 5

A 5

2 F / 2 B C

A 5 3 F / 3 B C

7

B 1

1 R

8

1 U

1 C 2 R

1

7

1 P

9

6 1

2 P

8

4 1

A 5

1 4 P

7


Test Point Locations, DC Power Distribution PCB. Test Point TP1 TP2 TP3 TP4 TP5

Signal Name GND +5V +12V -12V -5V

Location A1 A1 A3 A2 A2


Fast Scan Converter PCB, P/N 00-876399

2

1

C

A

D

B

E

F


Test Point Location, Fast Scan Converter PCB. Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14

Signal IOR IOB IOG IOR HDRV IOB IOG SYNC GND GND GND GND GND GND

Location D2 E2 E2 E2 D2 E2 F2 D1 B2 B1 D2 D1 F2 F1


Hi Scan Brightness/Contrast Control PCB, P/N 00-876353

D

C

A 3 3 P 5

R 3 7 R 3 3

A 3 5 P 4

C R 4

A 3 5 P 3

C 2

C 3

A 3 5 P 9

A 3 3 P 7

R 9

R 2 6

C10

R 2 2

R R R R 1 1 1 1 9 7 5 2 R 1 0

C 8

R 8

C 7 R 1 3

R 2 0

Q 1

C 1

C 4

R 2 1

R 2 4

1

R 1

C R 1

K 1

R4

C 6

R 2 3

A 3 3 P 1 2

R3

R 2 8 C R 3

A 3 3 P 6

U 1

R 3 1

R 3 2

A 3 5 P 2

T P 2

C R 2

R 2 5

U 2

C R 5

T P 1

A 3 3 P 3

A

C9

R 3 0

R 3 5

A 3 3 P 2

R R R R 1 1 1 3 8 6 4 6

R 2 7

R 2 9

R 3 4

B

R 2

2

R 5

R 6

C 5

A 3 3 P 1

R 1 1 R 7

3

OEC-DIASONICS,INC REMOTE CONTRAST/BRIGHTNESS/ ASSY 00-876353- ( )

INFRA-RED


Test Point Location, High Scan Brightness/Contrast PCB. Test Point TP1 TP2

Signal Room light sensor voltage GND

Location D3 C1


Image Processor PCB, P/N 00-875954

P6

P8

P9

TP1 TP3 TP6 R D I U A G 1 C H 6 T

D A C

L E U F 2 T

P4

TP7 AGND

A U D 1 C 7

P3 TP4 GND

TP8 +5V TP5 GND

P R G O S R Y U C S A E T P 1 4 S E H 0 S M I C O R

P1

P2

MINI6600TM Imaging System Service Manual - Appendix TEST POINT LOCATION, IMAGE PROCESSOR PCB TEST POINT

SIGNAL

LOCATION

TP1

LEFT VIDEO OUT

A1

TP3

VIDEO IN

A1

TP4

GND

D2

TP5

GND

B2

TP6

RIGHT VIDEO OUT

A1

TP7

AGND

A1

TP8

+5 VOLTS

A2

MINI6600TM Imaging System Service Manual - Appendix IR Receiver PCB, P/N 00-874222 2

1

3

4

C OEC MEDICAL SYSTEMS INC

00-874222-

( ) C5

1 C

B

2 R C

C3

1 Q

C8

C4 L2

TP1

E6 E7

5 R

E5

1 L 6 C

1 R 3 1 C

E3

U1

A

7 C

Connect E1 E2 E3 E5 E6 E4

E2 C2

1 1 C

Function +8V PHOTO RTN +12V IR_SIG RTN

3 R E4

0 1 C

1 R C

C9

Wire Code WHT RED SHIELD VIO COAX-SIG GRAY

Wire No. 1 2 3 4 5 7

2 1 C

Location A4 A4 A4 B4 C4 A4

E1 R7 R6


Power Control PCB, P/N 00-878003 1

2

2 3 4 R R R 5 1 R R

P2 3

1

6

4

C5

E7

F1

2

R7 4

T2A-125V (SLOW BLOW) 5X20mm P4

XF1

1

C3 3 R C

K4 4 R C

B

P3

REPLACE ONLY WITH FUSE OF SAME TYPE AND R ATING

C2 1

1

3

2 U

TP2

TP1

1

0 0 6 2

C4 1

P5

JUMPER MUST BE INSTALLED 0 0 6 9

1 U 1 U X

4

ASSY 00-878003- ( )

OEC MEDICAL SYSTEMS INC. POWER CONTROL

A

3

4

K1

CR1

C1 K2

4 7

T1

12

2 R C

TP3

RV1 K3

R6

P1 6

3 1

C

RV2 4

1

3

CB2

1

1

0.2A 125V 1 CB1

6

1

3A 125V 3A 125V CB3

7

9

P6


Jumper Configuration Install jumper E7, location A3, between pins 1-2.

Test Point Location, Power Control PCB. Test Point TP1 TP2 TB3

Location B1 B1 B2

NOTE: The test points are to test for stuck-on faults in K3 and K4. To test relay K3, disconnect J1, J2, J5. Verify continuity between TP1 and chassis, and TP2 and chassis. An open indicates a fault in K3. To test relay K4, apply +12V to TP3 and verify continuity between P5-1 and chassis, and between P5-4 and chassis. An open indicates a fault in K4.

MINI6600TM Imaging System Service Manual - Appendix Surge Suppresser PCB, P/N 00-876786 B

A

ASSY 00-876786 C 3

3

9

P 1

R T 1 R V 4

1

7

1

R T 2 C 1

R V 1

3

9

P 2

E 1 7

R V 3

1

R T 4

R V 2

E 2

C 2

SURGE SUPPRESSOR OEC MEDICAL SYSTEMS, INC

R T 3

2

MINI6600TM Imaging System Service Manual - Appendix Video Switching PCB, P/N 00-872239

33 LVID TP2

LMON TP3

R43

1 3 C U1

2

L14

R118 2 2 8 1 C C R126

1 1 C

J7

TP4 RVID

1 1 1 C 1 2 1 C

CVO 0 0 1 C

J6

U3

3 1 C

2

R119

R141

U9

U4

C116

C7

C108

R142

Q5 R23

TP14 R21 C4

6 4 R

R42 6 2 C

C2

U11

R122

3 2 C 2 7

9 0 1 C 3 4 4 R R R

U12

3 8 R

1

C118

6 5 7 5 2 2 8 9 2 R C R C C

A

7 4 1 R

R51 CR8 CR9 R99 R100

+

TP26 +5VA TP23 AGND C36 +

C83

DGND +5V TP25 TP27 + TP28

TP24 TP19 -12V 2 L

C35

TP30

C41

-5V 1 L

6 L 4 L

C89

L12 6 7 C

7 7 C

U43 R88

U37 9 6 C

C1 +

C68 0 7 C

U44 5 6 C

+

C39

C90

5 L

Q8

R94

C22

R108 C73

U45

9 9 C

C74 R109 R107

1

DS2 R86

R91 C66

R93

R95

OEC-DIASONICS ASSY 00-872239- ( )

P3

CB

D

1 S D

TP38

R89 U38

R105 R106

3 L

TP33

8 J

U42

R87 +5VR

1 R V U32 TP31

+12V

+

C25

R92 R90

C62

C37

+

1 8 R

+

C40

C38

R97

R110

CSYOUT TP32

R102

R101

8 3 1 R

Q10

U36

C19

4 6 C

C61

U15 9 5 CU16

C104

CR1 U29 DGND J10 TP40 R103

U41

R156

R111

4 8 C

3 6 CU30

8 9 C

R47

0 6 C

U13

U26 7 R C

U40

1 7 C

U28 R98 E4

0 8 R

2 2 1 C

4 2 1 C

4 3 1 R

2 3 1 8 R C

7 5 1 R

8 4 R

3 2 1 C

C92

R139

3 4 C

V MD CL K TP37

U35

R50

CR6

9 1 1 C

R117

R76

TP22 R151

0 3 5 C 2 1 C

9 2 C

2 8 R 6 C U14

R133 TP9 R131 TP34 U2CSOT R24

R54

R149

V ML CL K TP36

7 9 C

Y2 4 9 C

U39 5 5 1 R

U34 Y1

7 7 R

2 4 C

L15

6 9 9 R 7 C

6 9 C

CR4 CR2 R145 R144

R78

C91

R154

U33

C52 L9

2

5 9 C

U27

R75 C16

R146

U31

R20 R19 R18 R135

C110

8 2 C 7 U6 8 CU7

4 2 1 R

A/DVIDEO TP16

TP11

CR5

R45 3 E

6 7 8 3 3 3 7 1 2 8 R R R 6 C C 8 C TP8 AUXVOUT 4 2 C

U19 U46

E1

0 2 C R143

R61 5 4 C R150

4 4 C

Q9

TP15

J4 C109

C114 C120

R64 C46

R114 R112 R121

C93

U22

R63 R60

R113

U10 TP10

8 4 C

TP35 VMDAT

R79

U25 R74

7 4 C

R22

34 J9

L10 C58

R148

U18

J2

5 3U5 R C

C49

R14

C5

7 1 C

TP18

R125 R66 R67

Q2

TP13

3 R 2 E

R68

R12

TP39 AGND R120

9 TOVCR2 2 1 TP7 R 2 R

2 7 6 R 5 C

R70

LDAC TP20 R7 5 5 U24 R6 C 1 7 C53 R8 R C50 C57 C103 L11 L13 TP21 R73 C54 R65 XU1

RDAC

A/DV

R15 R13

1 0 1 C 3 3 4 5 R 3 3 R R C117 R128 R130

R1

Q3 R17

TP12

4 1 C

1 3 2 5 3 1 6 R R 3 C R116 1 RTOVCR1 TP5 TP6 8 HCO 7 8 C 1 J3 C

3 5 2 1 1 1 R R

4 R

J5 5 7 C

TP29

C86

R9 TP17

U17

R16

C10

R140

4 3 C

5 3 R104 1 3 1 C C TP1

3

U8

R30

R44 U2

3 5 1 R

2 5 1 R

7 8 9 2 7 2 2 2 2 3 1 C R R R R

R137

R11 R10

J1

1 P6

R69

C113

4 C102

10

J11

E

F

MINI6600TM Imaging System Service Manual - Appendix Test Point Location, Video Switching PCB. Test Point TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP16 TP17 TP18 TP19 TP20 TP21 TP23

Signal CVO LVID LMON RVID HCO TOVCR1 TOVCR2 AUXVOUT CSOT A/DVIDEO RDAC A/DV -12 LDAC VOUT AGND

Location A3 A4 A4 A4 A3 A3 A2 A2 A1 C2 C4 C4 C1 C4 D4 D1

Test Point TP24 TP25 TP26 TP27 TP28 TP30 TP31 TP32 TP33 TP34 TP35 TP36 TP37 TP39 TP40

Signal -5V DGND +5 VA +5 V +12 V +5 VR +12 V CSYOUT VCO output U2CSOT VMDAT VMLCLK VMDCLK AGND DGND

Location D1 D1 D2 D1 D1 D1 D1 E2 F3 A1 E4 E4 F4 B3 E3


Tools and Test Equipment • Common hand tools • Torx Screwdriver Set • 1.5mm Allen Wrench • Oscilloscope Tektronix 2236 or equivalent • Digital Volt-Ohm-Meter • Dosimeter (Keithley Model 35050, PMX II non-invasive meter or equivalent) • Model 96030 Ion chamber • Mobile C-Arm Extender Card, OEC P/N 00-870775-01 • Resolution Tool, Converging Line Pair (LP/mm), OEC P/N 00-900860 • Resolution Tool, Mesh (LP/Inch), OEC P/N 00-900040 • Lead Apron • 1 mm Copper Filter (3 each required), OEC P/N 00-877682-01 • 9600 Boot and Diagnostic Disk (software), OEC P/N 00-877444-01 • Beam Alignment Tool, OEC P/N 00-879272 • SRAM (PCMCIA) Software, OEC P/N 00-900876

Paint Kits • Paint Kit, Elite Gray, Texture, OEC P/N 900524-11 • Paint Kit, Rhinestone, Texture, OEC P/N 900524-12 • Paint Kit, Windswept, Texture, OEC P/N 900524-13


Torx Crestcup Torque Specs CAUTION: The torque specifications given in the table below apply only for hardware being installed into steel or aluminum. When installing hardware into plastic mounted fasteners, tighten only until snug. Torx Screw Size 4-40 6-32 8-32 10-32

Nominal Torque Value 6 lbs./in 15 lbs./in 22 lbs./in 30 lbs./in

Acceptable Range 5-8 lbs./in 13-16 lbs./in 21-24 lbs./in 28-31 lbs./in

Certified Components Complete Report of Assembly, FDA Form 2579 whenever you replace the following certified component assemblies, per 21 CFR 1020.30 (d) (1) and (2). • Beam Limiting Device • Image Intensifier Assembly • Monoblock X-ray Source Assembly

System Environment Operating temperature Storage/Transportation temp Humidity, operating and storage Altitude, operating Altitude, storage Shock and Vibration

10 to 35 C (50 to 95 F) -10 to 55 C (+14 to +131 F) 20-80% (RH, non-condensing) 2.5 kilometers (8,202 feet) 0-12.2 kilometers (40,000 feet) 1G at 200 Hz for 2 hours


System Classification Class I Type B Ordinary protection against ingress of water Non AP (Non-Anesthetic Proof) Continuous operation

Video Signal Composite Video

US: EIA RS 170, 60 Hz, 525 line International: CCIR 50 Hz, 625 line

Connector Output Power Footswitch/Handswitch: External Video: Fast Scan Video: External Interface: Printer: Com 1, Com 2:

5 VDC (current limit 30 mA maximum) 0-2 VAC 0-2 VAC 0-5 VDC 0-5 VDC ± 12 VAC


X-ray Source Assembly Type Target angle Target Angle Focal Spot Total: Beam Quality Leakage Technique Factors X-ray Tube Rating Filament Rating Continuous Output Emission Current Duty Cycle Max. Heat Storage Max. Anode Cooling Rate

Fixed anode, tungsten filament 12 degrees (4-inch systems) 13.5 degrees (6-inch systems) 0.25 x 0.25 millimeters 1.8 mm Al equivalent Minimum HVL 2.6 mm Al @ 70 kV 75 kV and 100 µA 80 kilovolts maximum 1.57 VDC/2.28 Amps maximum 20-100 microAmps (µA) Continuous 7,000 H.U. (4,970 Joules) 3,000 H.U. (2,130 Joules)

MINI6600TM Imaging System Service Manual - Appendix Cooling Characteristics

MINI6600TM Imaging System Service Manual - Appendix Filament Emission Characteristics


Image Intensifier Nominal Entrance Field Size High Voltage power supply input voltage Anode voltage G 1 Electrode voltage G 2 Electrode voltage Photocathode current Input X-ray dose Central resolution Contrast Ratio

100 mm (3.94 inches) 24 ± 1 VDC 25 kV 0-300 VDC 1.3-3.5 kV 0.1 µA 50 microR/minute 70 Lp/cm (typical) 30:1 (typical)

Monoblock X-ray Generator The X-ray Generator in the MINI6600 Digital Mobile C-Arm complies with IEC 601-2-7/1987 and CSA 22.2 #601.2.7. The following information is in accordance with these standards. Reference: 601-2-7 Clause 6.8.2. Maximum µA @ nominal kV Maximum kV @ maximum µA Maximum output power Nominal output power for 0.1 sec. exposure Subclauses 5 through 8 do not apply.

Fluoroscopic Accuracy µA±5 percent kV±5 percent

100 µA @ 75 kV 75 kV @ 100 µA 7.5 Watts @ 75 kV, 100 µA 7.5 Watts @ 75 kV, 100 µA

MINI6600TM Imaging System Service Manual - Appendix Dimensions System Base Height: Width: Depth:

163.2 centimeters (64.25 inches) 69.2 centimeters (27.25 inches) 69.2 centimeters (27.25 inches)

C-Arm/Imaging Chain Height: Depth: SID:

82 centimeters (32 inches) 47.8 centimeters (18.7 inches) 40 centimeters (15.75 inches)

Base to End of C-Arm Front: Left: Right:

193 centimeters (75.3 inches) 192 centimeters (74.9 inches) 140 centimeters (54.6 inches)

C-Arm Extended System Height: Front Extension: Orbital Extension:

182 centimeters (71 inches) 131 centimeters (51.1 inches), Support Arm to C-arm 152 centimeters (59.3 inches)

Transport Position Height: Min. Width: Min. Depth:

163.2 centimeters (64.25 inches) 82 centimeters (32 inches) 75 centimeters (29.3 inches)

MINI6600TM Imaging System Service Manual - Appendix Dimension Drawings

. X A M . n m i . m 5 0 7 . 7 0 9 7 1

m . n m i 5 . 5 . 4 7 1 1 3 5 1

. N I . M n i m 5 m 7 . 2 9 . 7 2 7 5


1644.7 mm 64.75 in. 401.3 mm 15.8 in. 304.8 mm 12 in.

m . i m n 5 . . 5 7 2 1 1 3

692.0 mm 27.25 in



135

4 5 °

6600 CD

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