QDR-4000_TM_C_03

for biograPhy and to Add. 5. Type LASER ALIGNMENT and then press .

4-10

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 4 – Alignment & Calibration

Scan at least this amount.

Figur e 4-8. Scan of Pliers as Seen on Screen Note: It is imperative that you do not move the tool during this procedure. If it does move, you must realign the laser (steps 1 and 2 above).

6. Press for Spine and

for Performance Spine and then press . 7. When the scan of the pliers appears on the screen, press to stop the scanning. 8. If the blue arrow does not point to the tip, use the keys to position the blue arrow on the screen to the tip of the pliers (see Figure 4-8). 9. When done, press to reposition the arm. Note: At this point, the laser beam and the blue arrow are at the same point. The laser beam must be at the tip of the tool. If not, you must adjust the laser beam (Section 4.7.2).

10. Press to exit to the scan parameter screen. 11. Press to exit to the main menu. 12. Select utility. 13. Select “Emergency Motion.” 14. Press “0” on the keypad (Position Light). 15. Go to the next section.

4.7.2

ADJUSTING THE LASER BEAM

To adjust the laser beam, you must gain access to the laser diode assembly. Do the following: 1. Remove the top cover of the C-arm (if not already removed). 2. Referring to Figure 4-9, locate the laser diode assembly.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

4-11

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QDR  4000 Technical Manual

Figure 4-9. Locating the Laser Diode Adjustment Screw (Y-Axis)

Adjustment Screw & Lock   Nut (X-Axis)

Figur e 4-10. Laser Diode—Side View fro m Righ t 3. Referring to Figure 4-10, adjust the laser beam so that it is at the tip of the pliers. Note: You must loosen the lock nut to adjust the laser in the X direction. Be sure to tighten when finished.

4. Repeat the laser check procedure in Section 4.7.1. 5. Replace the top cover onto the C-arm.

4.8 SURVEYING FOR LEAKAGE RADIATION For regulatory and safety reasons, the Tank Assembly must be checked for radiation leakage at installation time or whenever the Tank Assembly is replaced. Theory

Radiation leakage from the Tank Assembly results from a defect in the lead liner of the tank or  its cover. If there is a hole in the lead liner, the resulting leakage manifests in a pencil beam. If  there is a crack in the lead liner, the resulting leakage manifests itself as a fan beam.

4-12

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 4 – Alignment & Calibration In either case, the initial survey must be taken close to and almost touching the tank with the survey meter probe. If a leak is found, the meter indicates a spike in the reading. If this occurs, you must then move the probe one meter (approx. 40”) from that spot to determine if the leakage is within acceptable levels. The Victoreen 450P has a response time of: Range 0-4 mR/h 0-40 mR/h

Time 3.3 seconds 4.5 seconds

This procedure explains how to check for leakage radiation around the Tank Assembly: X-Ray Beam Belt Cutout

Tank 

A erture

Leakage Test Tool installed  over aperture.

Figure 4-11. Checking for Tank Assembly Radiation Leakage 4.8.1

INITIAL LEAKAGE SURVEY

1. Remove the front panel, if installed (Section 6.4.1). 2. Move the C-arm as far forward as possible. 3. Place the leakage test tool (099-0566) over the aperture (see Figure 4-11). 4. Run SURVEY (Section 10.3.4). 5. Set the survey meter to “RATE”. 6. Press to turn on the X-rays. 7. Slowly move the meter probe (Victoreen Model 450P or equivalent) about all accessible surfaces, (see table above for meter response times) to detect any leaks. 8. If a leak is detected (a spike in the reading) measure that point at a one meter (approx. 40”) distance from the leak (along the same line from the X-ray source through the leak) and assure that the reading is 1.0 mR/h or less.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

4.8.2

FINAL LEAKAGE SURVEY

1. Position the survey meter one meter (approx. 40”) from the tank and move it all around  the outside. The reading must be 1.0 mR/h or less. 2. Record the highest reading in the service report. 3. Turn off the X-rays (press ). 4. Replace the front panel. Note: Record the results in the Radiation Measurement Report, Section 3.4.7.

4.9 MEASURING PATIENT DOSE AND SCATTER The patient dose is the amount of radiation the patient receives when he or she is scanned. Scatter is the amount of radiation that bounces off of any material as the X-ray beam goes from the source to the detector. Before starting: •

Make sure all the panels are on the scanner and the pad is on the table.

•

You must have an ion chamber radiation meter to measure patient dose and scatter.

WARNING: Do not place your hands or other body parts in the path of the X-ray beam.

4.9.1

PATIENT DOSE

1.

Place an ion chamber radiation meter in the center of the scan area, positioned so that the entire meter will be scanned.

2.

Turn the meter on, set it to INTEGRATE, and reset it to zero.

3.

Position the C-arm so that the laser is just to the left of the meter without touching it.

4.

Scan the meter. To do this, use AP Spine, Performance mode and reset the scan area to length = 9" and  width = 5".

5.

Verify that the entire meter has been scanned. That is, the entire meter can be seen on the monitor.

6.

Record the meter reading.

This should be between 3.8 and 8.8 mR. Note: Record the results in the Radiation Measurement Report, Section 3.4.8.

4.9.2

4-14

SCATTER 1.

Place the spine phantom in the center of the scan area.

2.

Center the beam by positioning the C-arm so that the laser is 1-1/2" to the right of the center.

3.

Using SURVEY, turn on the filter wheel () and then turn on the X-rays ().

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 4 – Alignment & Calibration 4.

Using a survey meter (Victoreen 450P or equivalent), measure the radiation at a distance of 1 meter (approx. 40") in a horizontal arc around the phantom.

Note: Move the meter slowly. Refer to the Victoreen 450P response time table, p. 4-13.

5.

Record the highest observed reading.

This should not exceed 0.2 mR. Note: Record the results in the Radiation Measurement Report, Section 3.4.8.

4.10 VERIFYING CALIBRATION AND RECALIBRATING This procedure describes how to check the calibration of a QDR 4000 and, if necessary, how to adjust its calibration constants.

4.10.1 CHECKING THE BONE MINERAL CONTENT (BMC) CALIBRATION Note: First insert the Calibration Utilities disk (099-0560) into the floppy drive. Note: Skip steps 1 and 2 on initial installation. Note: Do not proceed unless power has been on for at least 60 minutes, and the detector has stabilized.

1. Using the spine phantom shipped with the machine, run 20 scans as described below. In  place of the patient name, enter "Spine Phantom #XXXX," where XXXX is the serial number of the fantom. 2. Press from the Main Menu to escape to DOS. At the [C:\MENU] prompt type: A:AUTOSCAN -TS -N20 for English units or  A:AUTOSCAN -TS -N20 -L15 -W12 for metric units 3. When the scans are completed and the DOS prompt appears, type MAINMENU and   press . Following the default protocol (or, for existing installations, the protocol determined in step 1), analyze the 20 scans. 4. Using a calculator or AVRSCAN, find the coefficient of variation (CV) and mean of the 20 scan BMCs. If the CV exceeds 0.6% (0.006), check the filter wheel phasing (as described in Section 4.1) and the X-ray beam alignment (as described in Section 4.4). Repeat steps 3-5 before proceeding. 5. Compute 0.6% of the 20-scan mean = (20-scan mean BMC) x (0.006). 6. Verify that the 20-scan mean BMC is within + 0.6% of the BMC value on the phantom label. a) If it is, skip to Section 4.10.3.  b) If it is not, check and adjust the filter wheel phasing (Section 4.2) and the X-ray  beam alignment (as described in Section 4.5), then repeat steps 2-6. If the mean BMC of these new scans is still not within +0.6% of the phantom label value, adjust the Bone Correction Factor (BCF) as described below.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

4.10.2 CHANGING THE BMC CALIBRATION, IF REQUIRED, BY CHANGING THE BONE CORRECTION FACTOR (BCF) Note: At this point, you can run FSCAL (Section 10.3.5) and skip to step 12.

1.  Note the system's BCF. Note: The BCF is listed on every scan.

2. The new BCF = (Correct BMC) / (Measured BMC) x (Current BCF) 3. Edit the ENVIRON.BAT file (found in the MENU directory) to reflect the new BCF. 4. Reboot the computer. (This should be done anytime the ENVIRON.BAT file has been changed. 5. Run 10 more spine phantom scans, analyze them and add them to the QC database. Or  run RECALYZE (Section 10.3.2) on the 20 scans which have already been acquired. In either case, the BMC should now be within 0.6% of the BMC value printed on the  phantom label.

4.10.3 CHECKING THE BONE MINERAL DENSITY (BMD) CALIBRATION 1. Verify that the BMD is within 0.6% of the BMD of the phantom. If it is not, adjust the Area Correction Factor (ACF) using the same method used above to adjust the BCF. 2. Repeat step 5 in Section 4.10.2 above for Area instead of BMC and verify that the BMD is within 0.6% of the phantom BMD. 3. Print out a copy of the QC plots for BMC, Area, and BMD, along with ENVIRON.BAT, SCONFIG.TXT and spine phantom baseline scan and include these in the installation report.

4.11 CHECKING REPRODUCIBILITY Reproducibility is the ability of the scanner unit to perform consecutive scans while keeping the amount of radiation for each scan consistent. Reproducibility is checked by scanning the spine  phantom shipped with the unit 10 consecutive times. You must then plot the results of the High Air and Low Air measurements for these scans and assure that coefficient of variation for  absolute radiation is less than 4%. The plot screen does not display the coefficient of variation for absolute radiation directly. You must use the formula: coefficient of variation for absolute radiation = standard deviation (SD) x .0028. So: If…

Then…

the Standard Deviation (SD) for both High Air  (HiA) and Low Air (LoA) is less than or equal to 14,

the coefficient of variation for absolute radiation is less than 4%.

4-16

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 4 – Alignment & Calibration To do this: 6.

Perform 10 fast spine scans using AUTOSCAN (if not already done in Section 4.10.1).

7.

Analyze the 10 scans (using AUTOCOMP).

8.

Put the results in the QC database (if you have not already done so).

9.

At the Hologic Main Menu, select “QC”.

10.

Select “Database”.

11.

Press .

12.

At the displayed dialog box, select all parameters (type Y).

13.

Select “Plot”.

14.

Select “HiA”.

15.

Plot the data for the 10 scans in step 1.

16.

Assure that the SD is 14 or less.

17.

Repeat for “LoA” by repeating steps 9-11. This result must also be 14 or less.

Note: Record the results in the Radiation Measurement Report, Section 3.4.7.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

4-17

Section 5

5. SYSTEM COMPONENTS & LOCATION 5.1 FIELD REPLACEABL E UNITS (FRU) The following table lists the recommended spare parts and Field Replaceable Units (FRUs) for  the QDR 4000.

5.1.1

SCANNER PARTS

PART NUMBER 010-0127 010-0158 010-0954 010-0955 010-0956 010-0957 010-0962 010-0963 010-0964 010-0972 010-0978 010-0983 010-0985 010-0986 010-0992 020-0115 030-0007-01 030-0109 030-1796 030-1884 030-2358 110-0002 140-0001 140-0092 140-0093 160-0001 180-0391 200-0281 235-0031

DESCRIPTION

LOCATION

R&R

QDR Main Detector Assembly Stepper Translator Assembly Stepper Motor Power Supply Assembly Low Voltage Power Supply Assembly Power Switch Panel Assy. Power Inlet Assy. X-Drive Lead Screw Assy. Y-Drive Lead Screw Assy. Rear Bellows Control Panel Universal Tank Assembly QDR Filter Wheel Assembly X-Ray Cntrl. Assembly Laser Diode Assembly XRC Fan Assembly Isolation Transformer   Bearing Block QDR Lexan Table Panel Bearing Spacer Knee Block, Cloth-Covered QDR Table Pad, Cloth-Covered PMT Power Supply Assembly A/D Converter Board X-Ray Controller Board Signal Distribution Bd. Line Filter 20 A Filter Wheel Pickoff Assembly Coupling Set Screw Shaft Spacer

Figure 5-6 Figure 5-1 Figure 5-1 Figure 5-1 Figure 5-4 Figure 5-4 Figure 5-3 Figure 5-3

6.11

Figure 5-6 Figure 5-7 Figure 5-7 Figure 5-7 Figure 5-6 Figure 5-7 Figure 5-1 Figure 5-3 Figure 3-15 Figure 5-3 Not Shown Not Shown Figure 5-6 Figure 5-6 Figure 5-7 Figure 5-1 Figure 5-1 010-0983 Figure 5-3 Figure 5-3

1

6.18 6.17

6.8 6.10 6.7 6.6 6.12

3.3.10

6.14 6.13 6.6 6.16

1

 Remove and Replace Procedure

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

PART NUMBER

DESCRIPTION

LOCATION Figure 5-3 Figure 5-3 Figure 5-1 Figure 5-2 Figure 5-1 Figure 5-2 Figure 5-7 Figure 5-3 Figure 5-3 Figure 5-3 Figure 5-3 Figure 5-3 010-0957

320-0003 320-0004 430-0016 465-0001 465-0005

Ball Bearing Assembly. Ball Bearing Assembly. Guide Rail Assembly (1240 mm) Includes Guide Bearings Guide Rail Assembly (760 mm) Includes Guide Bearing Filter Wheel Belt Lead Screw Coupling Motor Coupling Optical Shaft Encoder   Grommet, Blue Isolator   Grommet, Blue Isolator   Circuit Breaker, 15 A (used on 100/120 V systems only) Circuit Breaker, 7.5 A (used on 230 V systems only) QDR Filter Wheel Motor Assembly Stepper Motor   Varistor, 130 V Power Switch Limit Switch

465-0038 485-0043

Emergency Stop Switch Lamp, Green LED

250-0001 250-0002 253-0035 253-0038 255-0002 265-0002 265-0007 285-0001 295-0020 295-0041 310-0001 310-0006

5.1.2

1

Figure 5-7 Figure 5-3 Figure 5-1 010-0956 Figure 5-1 Figure 5-2 010-0972 010-0956

CABLES ASSEMBLIES

PART NUMBER 180-0006 180-0346 180-0347 180-0349 180-0350 180-0351 180-0352 180-0353 180-0354 180-0355 180-0356 180-0360

5-2

R&R

LOCATION DESCRIPTION

From:

To:

PMT A/D Translator Stepper Drive 28 V Supply AC In DC Supply AC In LVP Supply DC Out Power Switch Secondary Side Xfmr Computer/AUX X-Ray Out Line Filter P Side Isolation Xfmr Emg&Aux Relay Power T&C Limit Sw

Top of C-Arm, AD_J1 XTranslator&YTranslator 28 V PS LV Power Supply LV Power Supply Power Switch Assembly Secondary Side Xfmr Computer/AUX. X-Ray Outlets Line Filter Power Inlet Assembly DIN Rail T&C Board

A/D PCB & HV PS Distribution Bd, P18 DIN Rail DIN Rail Distribution Board, P19 DIN Rail DIN Rail DIN Rail

!

DIN Rail Main Circuit Breaker   Distribution Bd P17 Distribution Board, P11

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 5 – System Components & Location

PART NUMBER 180-0361 180-0362 180-0363 180-0364 180-0365 180-0366 180-0367 180-0368 180-0370 180-0371 180-0372 180-0373 180-0374 180-0375 180-0376 180-0377 180-0378 180-0379 180-0380 180-0383 180-0386 180-0391 180-0394 180-0404 180-0406

LOCATION DESCRIPTION

From:

To:

Y Motion Direction X Motion Direction Motor Drive Speed T&C Power T&C Control Motor Drive Direction T&C Data Y Stepper Drive L/R Switches A/D Data X Stepper Drive Fwd/Back Sw. Mounts Fwd/Back Switches X-Ray Controller Signal X-Ray Cntrl. Pwr (Base) X-Ray Controller Power Control Panel Pwr Emg Stop/Laser Pwr A/D Power Int. Computr Ac Power X Stepper Signals Filter Wheel P/O Tank Power And Signal Filter Wheel Ext. Encoder Interface

Stepper Motor Control Stepper Motor Control Stepper Motor Control T&C Board T&C Board Stepper Motor Control T&C Board Y Translator Left Limit Switch A/D PCB, P2 X Stepper Motor Front Limit Sw. Front/Back Sws, FB_P1 XRC PCB, P5 XRCP_J1 XRC PCB, P2 Panel Control Emg Stop/Laser, EAL_P1 Top of C-Arm, AD_P1 Computer X Translator Filter Wheel P/O Assy X-Ray Tank Term. Strip Filter Wheel Assembly X Motion Encoder

Distribution Bd, P16 Distribution Bd, P14 Distribution Bd, P15 Distribution Board, P1 Distribution Board, P10 Distribution Bd, P13 Distribution Board, P9 YM_P1 (Y Stepper Motor) Right Limit Switch Distribution Bd, P12 Distribution Bd, P21 Back Limit Sw. Distribution Bd, P5 Distribution Bd, P24 DIN Rail XRCP_P1 Distribution Bd, P8 Distribution Bd, P7 Distribution Bd, P6 DIN Rail Distribution Bd, P20 XRC PCB, P6 XRC PCB, P1, P3, P7 XRC PCB, P4 Distribution Bd, P22

!

Copyright 1998 by Hologic, Inc. All rights reserved.

5-3

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QDR  4000 Technical Manual

5.1.3

COMPUTER PARTS

PART NUMBER

DESCRIPTION

LOCATION

R&R

010-0990

Computer Assembly

Figure 5-4 Figure 5-8 Figure 5-8 Figure 5-8 Figure 5-5 Figure 5-8 010-0990 Figure 5-8 010-0990 Figure 5-8 Figure 5-5 010-0990 010-0990 010-0990 010-0990 Figure 5-5 Figure 5-5 Figure 5-5

6.15

120-0049

130-0001 140-0025 300-0351 C-PRINTDLX-400 LASERJET-400

5-4

3.5” 1.44 MB (Drive A) PCI SCSI Host Adapter (JAZ Drive) 17 in. Hi Res Monitor   Optical Disk Drive MODS-1 (Internal) SCSI Interface Board 28.8 Minimum Data/Fax Modem 2 MB Onboard Graphics Subsystem 1 GB Removable Hard Drive (JAZ) 14 in. Hi Res Monitor  3.5” Ide 2 GB Minimum (Drive C) Timing & Control Board Video Adapter  Stepper Motor Controller Board Power Outlet Strip Color Printer, HP Paintjet Laser Printer  

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 5 – System Components & Location

5.2 LOCATING SYSTEM FRUS AND OTHER PARTS Top View Y-Drive Assembly (see Figure 3) X-Stepper Translator Assy. (010-0158) Y-Stepper Translator Assy. (010-0158) 28V Stepper P.S. (010-0954) Guide Rail Assy. (253-0038) Y-Drive Limit SW (2x) (465-0005) +5/-15V DC P.S. (010-0955)

Y-Drive Assembly (see Figure 3) X-Carriage FRUs (see Figure 2)

Signal Distribution Board  (140-0093)

Guide Rail Assy. (253-0035)

Line Filter 20A (160-0001) Isolation Transformer  (020-0115)

FRONT

Varistor, 130V (2X) (430-0016)

Figur e 5-1. Base Assembl y FRUs

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

X-Drive Assy. (see Figure 3)

FRONT

Limit Switch (2x) (465-0005) Guide Rail Assy. (253-0035)

Guide Rail Assy. (253-0038)

Figure 5-2. X-Carriage FRUs

Lead Screw Coupling (265-0002)

See Note 2.

Stepping Motor Assy. (320-0004) Blue Grommet, 1/8” (4x) (295-0020)

Bearing Block (2x) (030-0007-01) Bearing Spacer  (2x, 030-1796)

Motor Coupling (265-0007) See Note 2.

Ball Bearing Assy. (250-0002)

Lead Screw Assy. See Note 1.

Optical Encoder  (285-0001)

 Note 1. X-Drive - 010-0962 Y-Drive - 010-0963

 Note 2. Replace original set screws with 200-0281

Ball Bearing Assy. (250-0001)

Figure 5-3. X/Y-Drive FRUs

5-6

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Shaft Spacer  (235-0031) Blue Grommet, 1/16” (2x) (295-0041)

Section 5 – System Components & Location

Power Switch Panel (010-0956)

Power Inlet Assembly (010-0957)

Computer Assembly (010-0990)

Figure 5-4. Fron t and Left Side FRUs Printer 

Monitor  Keyboard  Power Outlet (mounted on back)

Mouse

Figure 5-5. Operator Consol e FRUs

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

Main Detector  (010-0127)

Laser Diode (010-0986

Top View

A/D Converter  (140-0001)

Control Panel (010-0972)

PMT Power  Supply Assy. (110-0002)

FRONT

Right Side View

Figure 5-6. C-Arm FRUs Filter Wheel Belt (255-0002)

Filter Wheel (010-0983)

Fan Assy. (010-0992)

Filter Wheel Motor  (320-0003) Universal Tank Assy. (010-0978)

X-Ray Ctrl Assy. (010-0985) X-Ray Ctrl PCB (140-0092)

Figur e 5-7. Tank Ass embly FRUs

5-8

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 5 – System Components & Location CD ROM Drive M/O Drive (opt.) 3.5” Floppy Drive 1

“JAZ” Drive

2 3 3 4 5 6 7

LEGEND

3

1

Video Card 

2

“JAZ” SCSI Interface Board 

3

“Open”

4

Stepper Motor  Controller Board 

5

Timing and  Control Board 

1 2 6 5

6

 Network Card Option Slot

4 7

7

Modem Control Card 

Figure 5-8. Comput er Assembly and Components

!

Copyright 1998 by Hologic, Inc. All rights reserved.

5-9

Section 6

6. REMOVE AND REPLACE PROCEDURES 6.1 POWERING DOWN THE SYSTEM WARNING: In most cases it is imperative that you power down the system before gaining access to the inside of the scanner. The scanner (instrument) contains dangerous voltages, mechanics and heat that may cause serious bodily harm.

Refer to Figure 6-1 and follow these procedures: 1. Make sure that the system is not in use. Note: It is good practice to ask the operator for permission to shut the system down.

2. Make sure the computer is in DOS at the C:\MENU> prompt by pressing and holding down at the selections menu. 3. Disable the X-rays by turning the X-Ray Enable Key counter-clockwise from 3 o’clock  to 12 o’clock. The green LED should go off. 4. Remove scanner power by switching the Instrument Power switch to the 0 position. 5. Remove operator console power by switching the Computer Power switch to the 0  position. 6. Remove power to the entire system by setting the Main Circuit Breaker to the 0  position. 7. Remove power from the system by removing the power cord from the facility power  outlet. Power Switch Panel X-Ray Enable Key Switch Computer Power  Instrument Power  I

P

n

o

s

t w

r

u

X

M

a

i

n

R

1 P

1 O

o

e

w2

2

e

p

r 0 m

0

V

e

o

V

t

r

a

m

m

e

t

o

a

X

-

r

x

a

C

R

1

x

a

o

0

1

A

y

n

A

s

I

n

o

-

R

d

l

m

e

a

C e P

r

y

E

i

n

a

c

n o o

b

l

t m w

p

e

r

u

t

e

r

e

a

t

o

Main Circuit Breaker (CB1)

r

e

Power Source Cord 

Main Power Panel

Figure 6-1. System Power Control

!

Copyright 1998 by Hologic, Inc. All rights reserved.

6-1

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QDR  4000 Technical Manual

6.2 GAINING ACCESS TO THE INSIDE OF THE SCANNER WARNING: Power down the system before performing this procedure (Section 6.1).

You must gain access to the inside of the scanner to perform many of these procedures. You can do this by: a) Removing the front panel (Section 6.4.1).  b) Removing the bellows assembly in the back. Note: You can follow the procedure in Section 6.8.1 completely or you can simply remove the screws, washers and washer plate from one side ( Figure 6-7) and slide the bellows toward  the C-arm.

c) Removing the Lexan panel or the entire table (Section 6.3.1). d) Any combination of the above.

6.3 THE TABLE 6.3.1

REMOVAL

Eight sets of screws and washers hold the table to the frame. To remove the table, refer to Figure 6-2 and: 1. Remove the table pad (if present). 2. Remove the eight screws and their washers. 3. Remove the table.

6.3.2

REPLACEMENT

To install the table onto the scanner frame: 1. Set the table in place on the frame. 2. Insert the eight fastening screws. 3. Place the table pad on top of the table (if previously removed). Note: Be sure to replace the Lexan panel if it is not inserted in the table.

6.4 THE FRONT PANEL 6.4.1

REMOVAL

To remove the front panel, face the scanner from the front and: 1. Disengage the front panel screw by turning it ¼ turn (Figure 6-2).

6-2

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace

Table Securing Hardware (8x) Table (removed)

Upper Holding Brackets (2x)

Front Panel

SLIDE LEFT, TILT OUT then LIFT

Computer 

Lower Holding Brackets (2x)

Front Panel Screw

Figure 6-2. Removin g the Table and Front Panel 2. Slide the front panel to the left to disengage the holding brackets. 3. Tilt out and lift the front panel to remove. 4. Remove the ground strap.

6.4.2

REPLACEMENT

To install the front panel onto the scanner unit, refer to Figure 6-2 and: 1. Place the front panel onto the frame via the lower holding clips. You must tilt the top of the panel forward to align the brackets properly. 2. Reconnect the ground strap. 3. Tilt the top of the front panel so it touches the top of the scanner frame and slide to the right. 4. Engage the front panel screw ¼ turn.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

6-3

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QDR  4000 Technical Manual

6.5 THE C-ARM WARNING: Power down the system before performing this procedure (Section 6.1).

6.5.1

REMOVAL

WARNING: Power down the system before performing this procedure (Section 6.1).

For this procedure, refer to To remove the C-arm, refer to Figure 6-3 and  Figure 6-4 and: 1. Remove the back cover (4 screws). 2. Remove the top cover (10 screws). 3. Disconnect the four cables and the cable clamp ( Figure 6-4). 4. Feed the cables through the hole below the high voltage power supply and then through the C-arm channel. Note: Place the cables where they will not get damaged.

5. Remove the mounting stud nuts and washers. 6. Remove the ground strap from the ground lug.

6-4

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace

Top Cover 

Cables

Top Mounting Screw (2x)

Brace (2x)

19 1 2 ! 1/8 in. Adjusting Screws (4x) Back Cover 

Mounting Stud (2x) Mounting Screw (2x) Ground Lug

Lower Carriage

Mounting Stud Nut and Washer (2x)

Upper Carriage

Figur e 6-3. Removing the C-Arm (si de view)

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

Operator Panel Cable

Mate Pin 1 with Red Stripe

Red Stripe

              1

Cable Clamp

Ground Strap

Emer. Stop/Laser Cable

Power Cable

A/D Signal Cable

Figure 6-4. Removing the C-Arm (top view) 7. Remove the brace fastening hardware which secures the C-arm to the Upper-Carriage Assembly. 8. Remove the mounting screws and washers. 9. Lift the C-arm from the Upper-carriage assembly, being careful not to damage the cables.

6.5.2

REPLACEMENT

WARNING: Power down the system before performing this procedure (Section 6.1).

Refer to Figure 6-3 and: 1. Remove the back cover (4 screws). 2. Place the C-arm into the X-carriage assembly so that the mounting studs pass through the mounting holes. Be sure to clear the cables as they pass through the cutout. Note: Do NOT attach washers and nuts at this time.

3. Attach the mounting screws and washers. 4. Fasten the brace to the X-Carriage Assembly. 5. Fasten the ground strap to the ground lug. 6. Install the mounting stud nuts and washers. 7. Remove the top cover (10 screws). 8. Feed the cables up through the C-arm channel and through the hole below the high voltage power supply. 9. Connect the four cables and the cable clamp as indicated.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace 10. Install the top and back C-arm covers. Note: You must now level the C-arm. Go to Section 3.3.11.

6.6 THE X-RAY CONTROLLER ASSEMBLY AND THE X-RAY CONTROLLER BOARD WARNING: Power down the system before performing this procedure (Section 6.1).

6.6.1

REMOVAL

CAUTION: The X-Ray Controller Assembly (XRC, Figure 6-5), is static sensitive. All antistatic precautions must be taken before handling the XRC, such as grounded wrist straps and  static mats.

You must gain access to the inside of the scanner (Section 6.2). Refer to Figure 6-5 and: 1. Remove all the cables from the connectors and the ground strap from the XRC. 2. Remove the four XRC fastening screws and washers. 3. Remove the XRC and set aside in a static-free area. The XRC Board can now be removed from the assembly.

6.6.2

REPLACEMENT

WARNING: Power down the system before performing this procedure (Section 6.1).

Refer to Figure 6-5 and: 1. Place the XRC assembly onto the tank assembly as pictured in Figure 6-5. 2. Install all securing nuts and screws. 3. Connect all cables and the ground strap. ( Figure 9-10).

6.7 THE TANK ASSEMBLY 6.7.1

REMOVAL

WARNING: Power down the system before performing this procedure (Section 6.1).

1. Remove the front panel (Section 6.4.1). 2. Remove the XRC assembly (Section 6.6.1). 3. Remove the front tank cover (Figure 6-5). WARNING: The tank assembly weighs approximately 200 lb (90 kg) and you must not attempt to remove it alone.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

CAUTION: When removing the tank assembly, take care not to damage the X-drive stepper  motor. Side View of QDR 4000 with Table and C-Arm Removed  XRC Assembly

Front Tank Cover  Tank Assembly

Front Cable Jacks (5x)

Rear Cable Jacks (3x)

X-Drive Step Motor 

Tank Anchor  Bolts (4x)

FRONT

Figur e 6-5. Removing t he Tank Assy.—Step I Front Tank Cover Removed 

MOTION

X-Drive Motor Clearance

Tank Dolly

Figur e 6-6. Removing the Tank Assy.—Step II 4. Remove the five XRC cables at the front of the assembly. 5. Disconnect the three cables at the rear of the XRC assembly. 6. Remove the four screws in the corners of the XRC assembly and remove the XRC. 7. Remove the four tank assembly anchor bolts and washers located at the lower four  corners.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace 8. Referring to Figure 6-6, slide the tank assembly forward, tipping the front down to clear  the X-drive motor.

6.7.2

REPLACEMENT

WARNING: Power down the system before performing this procedure (Section 6.1).

WARNING: The tank assembly weighs approximately 200 lb (90 kg) and you must not attempt to replace it alone.

CAUTION: When replacing the tank assembly, take care not to damage the X-drive stepper  motor.

1. Position the lower carriage at the center of the Y-drive (left to right). 2. Position the upper carriage so that it is in the center of the scanner. 3. Referring to Figure 6-6, slide the tank assembly through the front chassis taking care to clear the X-drive stepper motor. 4. Set the tank assembly onto the upper-carriage assembly and position it over the four  mounting holes. 5. Fasten the tank assembly using the four anchor bolts and washers. 6. Place the XRC in position and fasten with the four screws and washers (Figure 6-5). 7. Plug all the cables into the jacks on the XRC in the front and in the back. 8. Replace the front tank cover.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

6.8 THE BELLOWS ASSEMBLY

Top Rail

Support Bracket Bellows

Flathead  Screw (2x)

Washer Plate Bellows Screw & Washers (4x)

Figure 6-7. Removing the Bellows 6.8.1

REMOVAL

The bellows assembly is located on the back of the scanner and is used to enclose the internal components. The bellows assembly consists of: •

Corrugated black bellows, one on either side of the tank assembly.

•

Guide rails, one above and one below the bellows.

•

Support brackets, one on each side of the tank assembly between the tank and the  bellows.

•

Securing hardware

To remove the bellows assembly, refer to Figure 6-7 and: 1. Remove the two screws and washers that hold the top rail in place. They are located at each end. 2. Remove the eight screws and washers, four at each side, that hold the bellows to the frame. 3. Remove the four flat-head screws that hold the support brackets to the X-carriage assembly. There are two screws for each bracket. Note: The support bracket and bellows remain attached for this procedure.

4. Remove the filler panels and bellows intact.

6.8.2

REPLACEMENT

To install the bellows assembly to the back of the scanner, refer to Figure 6-7 and:

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace 1. Remove the top rail by removing the screws and washers at each end. 2. Attach the bellows to the support bracket if not already done. 3. Attach the bellows to the side of the opening in the rear of the scanner using the washer   plate and securing hardware. 4. Attach the support bracket to the X-carriage assembly using the flat-head screws. 5. Repeat steps 2-4 above to install the remaining bellows. 6. Install the top rail.

6.9 THE FRAME 6.9.1

REMOVAL

WARNING: Power down the system before performing this procedure (Section 6.1).

To remove the frame, you must first remove: 1. The table (Section 6.3.1) 2. The front panel (Section 6.4.1) 3. The bellows assembly (Section 6.8.1) 4. The Main Power Panel (Section 6.17.1) 5. The Power Switch Panel (Section 6.18.1) 6. The computer cables from the access hole on the left side

Frame Mounting Hardware (4x) Frame Base Assembly

Figure 6-8. Removi ng t he Frame Then refer to Figure 6-8 and: 1. Removing the five sets of bolts and washers (one in each corner and one near the computer cable cutout) from the inserts in the lower flanges of the frame. 2. Carefully remove the frame from the lower carriage assembly.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

6.9.2

REPLACEMENT

WARNING: Power down the system before performing this procedure (Section 6.1).

It is unlikely you will have to replace the frame but you may have to reinstall it after removing it while installing the scanner. To reinstall the frame, refer to Figure 6-8 and: 1. Place the frame over the four inserts in the base assembly. 2. Install the mounting hardware. 3. Replace all the hardware and cables listed in the previous section.

6.10 THE CONTROL PANEL WARNING: Power down the system before performing this procedure (Section 6.1).

6.10.1 REMOVAL The Control Panel is located at the front-most end of the C-arm ( Figure 6-9). To remove it: 1. Remove connections A from pins 11 and 12 on the Emergency Stop Switch. 2. Remove connection H. 3. Remove the four Control Panel Fastening Screws and the ground strap (not shown). 4. Pull the Control Panel forward to remove.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace Control Panel Emer. Stop Sw.

Control Panel Fastening Screws (4x)

A

H (pin 1 to red stripe)

aser Diode Assy.

Main Detector  Mounting Block 

B C

Main Detector  Assy.

D

G

E

I

A/D Converter 

J

F PMT Power  Supply Assy.

K 

Figure 6-9. C-Arm Components 6.10.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

To replace the Control Panel, refer to Figure 6-9 and: 1. Fit the Control Panel onto the C-arm as pictured. 2. Fasten with the four Control Panel Fastening Screws and washers at each of the four  corners. 3. Make connection H. 4. Make connection A by placing one of the two connectors onto pin 11 and the other onto  pin 12. You can connect either wire to either pin. 5. Reconnect the ground strap (not shown).

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

6.11 THE MAIN DETECTOR 6.11.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

Refer to Figure 6-9 and: 1. Remove connections G, and D. 2. Release the cable clamp (I). The Main Detector Mounting Block is secured by a screw accessible from beneath the C-arm. 3. Remove this screw and washer and remove the mounting block. Note: The mounting bracket and the detector are inseparable and must be removed together. (There may be one more connector not shown in Figure 6-9.)

6.11.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

Make sure that the main detector, the mounting bracket and mounting screw are assembled. Locate the position of the main detector in the C-arm (refer to Figure 6-9) and: 1. Set the main detector in place so that the mounting screw passes through the mounting hole in the C-arm. 2. Secure using the nut and washer fasteners. 3. Make connections G, and D. (There may be one more connector not shown in Figure 6-9.) Note: After replacing the Main Detector, you must do the Main Detector Alignment (Section 4.5).

6.12 THE LASER DIODE ASSEMBLY 6.12.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

Locate the laser diode assembly in Figure 6-9. A detail of the diode assembly is pictured in Figure 6-10. To remove the laser diode assembly: 1. Remove the connectors at pins 11 and 12 on the Emergency Stop Switch. 2. Remove Connector C. 3. Remove the Clamp Nut and Washer. 4. Remove the Laser Diode Assembly.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace Emergency Stop Switch

      1       1       2       1

Connection C.

Clamp Nut & Washer 

Figur e 6-10. Laser Diode Assemb ly 6.12.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

Refer to Figure 6-10 and: 1. Place the Laser Diode Assembly into its proper position in the C-arm (Figure 6-9). 2. Secure the Laser Diode Assembly using the Clamp Nut and Washer. 3. Make Connection C. 4. Make the connections to pins 11 and 12 on the Emergency Stop Switch. Note: After you replace the Laser Diode Assembly, you must perform the Laser Diode Alignment (Section 4.7).

6.13 THE A/D CONVERTER ASSEMBLY 6.13.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

Locate the A/D Converter Assembly in Figure 6-9 and: 1. Remove connections D, E and F. 2. Remove the four mounting screws and washers and remove the A/D Converter  Assembly.

6.13.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

Locate the A/D Converter Assembly in Figure 6-9 and: 1. Place the A/D Converter Assembly in its proper place in the top on the C-arm.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual 2. Insert the four mounting screws and washers to secure the A/D Converter Assembly. 3. Make connections D, E and F.

6.14 THE PMT POWER SUPPLY ASSEMBLY 6.14.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

Locate the PMT Power Supply Assembly in Figure 6-9 and: 1. Disconnect clamp I and connection J. 2. Remove three mounting screws and washers and remove the PMT Power Supply.

6.14.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

Locate the PMT Power Supply Assembly in Figure 6-9 and: 1. Set the PMT Power Supply into its proper position and secure with three mounting screws and washers. 2. Make connection J. Note: There may be one more connection that is not shown.

6.15 THE COMPUTER 6.15.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

Refer to Figure 6-2 to locate the computer. To clear the computer area for better access after getting inside, you can slide the X-carriage assembly to the right by pushing it by hand. CAUTION: Do not move the carriage assemblies faster than one inch per second in order to  protect the stepper motor translators.

After gaining access to the inside of the scanner: 1. Loosen the computer hold-down bracket by backing off the screws and washers fastening it to the scanner base and slide it to the right. 2. Slide the computer to the front about 10 in. 3. Remove all the cables in the back of the computer that go through the access hole on the left side of the scanner to the operator console (the mouse, keyboard, printer, etc.). 4. Locate the Signal Distribution Board (Figure 5-1 and Figure 9-4) in the base or the scanner.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace 5. Disconnect the following cables from the Signal Distribution Board: J1, J9, J10, J11, J13, J14, J15, J16 6. Slide the computer forward and remove.

6.15.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

Before installing the computer, make sure that it is configured properly, that is, control boards  properly installed and addressed; internal peripherals installed; etc. If any internal changes need  to be done to the computer components, you must remove the computer first. (See Section 9 for   board configuration data.) Refer to Figure 6-2 to find the computer location. You must gain access to inside of the scanner. Do this by: a) Removing the front panel (Section 6.4.1)  b) Removing the bellows assembly (Section 6.8.1) in the back on the computer side c) Removing the Lexan panel or the entire table (Section 6.3.1) d) Any combination of the above. To clear the computer area for better access after getting inside, you can slide the X-carriage assembly (Figure 5-1) to the right by pushing it by hand. CAUTION: Do not move the carriage assemblies faster than one inch per second in order to  protect the stepper motor translators.

Then: 1. Slide the computer into its place under the hold-down bracket but leave room in the  back to install the cables. 2. Install the cables coming from the Timing & Control Board and the Stepper Motor  Board into the Signal Distribution Board ( Figure 5-1 and Figure 9-4) as follows: J1, J9, J10, J11, J13, J14, J15, J16 3. Install all the cables into the back of the computer that go through the access hole on the left side of the scanner to the operator console (the mouse, keyboard, printer, etc.). 4. Slide the computer back and to the left and secure with the hold-down bracket. Note: The distance from the front of the computer to the front of the frame should be 5/8”.

5. Reassemble the scanner.

6.16 THE AC LINE FILTER 6.16.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual The AC line filter is located under the computer pedestal which is located under the computer. To remove the AC line filter: 1. Remove the computer (Section 6.15.1) 2. Remove the computer and the hold down bracket. 3. Remove the wires connected to the AC line filter. 4. Remove the AC line filter fastening screws. 5. Remove the AC line filter.

6.16.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

To replace the AC line filter: 1. Place the AC line filter into its place in the base of the scanner . 2. Attach the proper wires. 3. Install the computer pedestal. 4. Install the computer (Section 6.15.2).

6.17 THE MAIN POWER PANEL The Main Power Panel can be located by referring to Figure 6-1.

6.17.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

To remove the Main Power Panel: 1. Remove the external power chord connected to the Main Power Panel. 2. Remove the four (4) lock nuts holding the Main Power Panel to the frame. 3. Remove the Main Power Panel. 4. Remove all the wire connections.

6.17.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

To replace the Main Power Panel: 1. Remove the front panel (Section 6.4.1). 2. Set the Main Power Panel in its place in the frame. 3. Secure with four lock nuts. 4. Make all the internal electrical connections necessary. 5. Install the external power cords. 6. Install the front panel.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 6 – Remove & Replace

6.18 THE POWER SWITCH PANEL The Power Switch Panel can be located by referring to Figure 6-1.

6.18.1 REMOVAL WARNING: Power down the system before performing this procedure (Section 6.1).

To remove the Power Switch Panel: 1. Remove the front panel (Section 6.4.1). 2. Remove the four (4) lock nuts holding the Power Switch Panel to the frame. 3. Slide the Power Switch Panel back along the threaded studs toward the center of the scanner until it becomes free. 4. Remove all the wire connections.

6.18.2 REPLACEMENT WARNING: Power down the system before performing this procedure (Section 6.1).

To replace the Power Switch Panel: 1. Remove the front panel (Section 6.4.1). 2. Set the Power Switch Panel in its place in the frame. 3. Secure with four lock nuts. 4. Make all the internal electrical connections necessary. 5. Install the front panel.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Section 7

7. FAULT ISOLATION If an error message appears, refer to Section 11 for an explanation of the message and its possible cause. Tabulated below are the symptoms, possible causes and recommended solutions of the problems you may have with the QDR 4000. The problems are divided into six categories (Scanning/XRay Generation, Precision, Motion, Noise, Data Storage & Retrieval and Miscellaneous. Possible causes are listed in order of decreasing probability. For any given symptom, investigate potential causes in the order listed.

7.1 PROBL EMS IN THE SCANNER UNIT 7.1.1

SCANNING/X-RAY GENERATION PROBLEMS

Symptoms

scans are noisy or grainy

Scans have wavy edges ("French fries") or lines

Scans have spots or streaks

Possible Causes

Recommended Action

Go To…

misaligned source/detector oil in precollimator cup bad A/D-to-T&C cables bad T&C-to-X-Ray Controller  cables bad Distribution Board low PMT supply voltage bad A/D board bad X-ray controller board filter wheel phase error loose filter wheel segment bad detector bad HVPS/Source loose X or Y-axis ball nut hardware filter wheel phase error loose or defective filter wheel belt wrong filter wheel belt tension bad Stepper Motor Controller  board bad Timing & Control board bad A/D to T&C cables bad Distribution Board bad cables to tank assembly bad A/D board

realign source/detector  replace the tank repair/replace cables repair/replace cables

3.3.11, 4.4 6.7 5.1.2 5.1.2

replace board adjust or replace supply replace board replace board adjust filter wheel phasing replace filter wheel assy. replace detector   replace tank assembly tighten, run BACKLASH program adjust filter wheel phasing tighten or replace belt

Figure 5-1 4.6 6.13 6.6 4.2

adjust belt tension replace board

4.2 Figure 5-7, 4.2 4.2 Figure 5-8

replace board repair/replace cables replace board repair/replace cables replace board

Figure 5-8 5.1.2 Figure 5-1 5.1.2 6.13

bad X-ray controller board

replace board

6.6

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Copyright 1998 by Hologic, Inc. All rights reserved.

6.11 6.7 Page 10-7

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no display (white screen),

monitor display is dim

bad T&C to X-ray controller  cables blown X-Ray Controller board fuse bad T&C-to- tank assembly cables bad HVPS/Source loose or defective monitor cable defective monitor defective display board defective monitor defective display board failing CRT or monitor power  supply

desired area is not fully scanned

operator error laser misaligned

retry adjust laser

no X-rays, no"Xrays On" light on control panel

no display of any kind on monitor  display jumps on monitor 

7.1.2

5.1.2

replace fuse

Figure 4-1

repair/replace cables

5.1.2

replace tank assembly tighten/repair/replace cable replace monitor   replace board replace monitor   replace board increase brightness or  replace monitor 

6.7 5.1.3 5.1.3 5.1.3 5.1.3 5.1.3 5.1.3

6.12

PRECISION PROBLEMS

Symptoms

display has spots

phantom BMD drift or shift

7.1.3

repair/replace cables

Possible Causes

Recommended  Act io n

Go To…

bad A/D-to-T&C cables low PMT supply voltage bad Distribution Board bad detector bad A/D board bad X-ray controller board bad X-ray tube misaligned source/detector oil in precollimator cup bad detector

repair/replace cables adjust or replace supply replace board replace detector replace board replace board replace tank assembly align source/detector  replace tank assembly replace detector

5.1.2 4.6 Figure 5-1 6.11 6.13 6.6 6.7 4.5 6.7 6.11

MOTION PROBLEMS

Note: First differentiate between mechanical and electrical carriage motion/leadscrew problems  by turning the leadscrew by hand (during Main Menu display, not while in Utility Local). If it turns freely, the problem may be electrical. If it turns very stiffly or not at all, the  problem is probably mechanical.

At the same time, check for axial play in leadscrew--there should be none.

7-2

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 7 – Fault Isolation

Symptoms

Possible Causes

Recommended Action

Go To…

emergency STOP switch pressed in

pull STOP switch out

Figure 2-1

key switch is in OFF position

turn key to ON

Figure 6-1

bad distribution board-totranslator cable

repair/replace cable

5.1.2

bad Stepper Motor Controller  board

replace board

Figure 5-8

bad stepper translator

replace translator  

Figure 5-1

bad stepper motor

replace motor  

Figure 5-1 Figure 5-2

bad translator-to-motor cable

repair/replace cable

5.1.2

bad Timing & Control board

replace board

Figure 5-8

disconnected ball nut bracket

reconnect bracket

Figure 5-3

bad leadscrew bearings

replace bearings

Figure 5-3

loose motor/leadscrew coupler

tighten setscrews

Figure 5-3

Electrical

no axis motion occurs when expected, or the machine stalls

Mechanical

Note: Insert the Calibration Utilities disk (099-0560) into the floppy drive. Note: Differentiate between mechanical and electrical causes of the "No Motion Detected While X-rays ON" message by going to DOS, typing A:MOTION OFF, rebooting and  running a scan. If the scan runs successfully, the error message source is probably electrical. If the machine seizes up, the problem is probably mechanical. WARNING: After making this determination, return to DOS, type A:MOTION ON and reboot to restore normal operation. In the MOTION OFF state, the machine will ignore motion failure, thus putting the  patient at risk if motion failure occurs during a scan!

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Symptoms

Recommended Action

motion starts, then stops, "No Motion Detected While X-rays ON" error message is displayed

see "No Motion Detected While X-rays ON" in Section 11, ERROR MESSAGES

7.1.4

NOISE PROBLEMS (ACOUSTIC)

Symptoms

noisy X- or  Y- axis motion

noisy Y-axis motion

Possible Causes

Recommended Action

loose or misaligned ball nut bracket bad leadscrew bearings dry rails dry leadscrews bad leadscrew or ball nut

tighten and/or realign bracket replace bearings lubricate rails lubricate leadscrews replace leadscrew/ball nut assy. adjust bellows

bellows binding worn filter wheel bearings

noisy filter  wheel

noisy fans

7.1.5

Go To…

replace filter wheel assembly adjust belt tension raise/lower pulley on shaft clean fan replace fan

Figure 5-7

Possible Causes

Recommended Action

Go To…

closed shutter bad

open shutter   replace laser

weak laser

clean with soft cloth

bad laser cable leaking tank gaskets

repair/replace cable tighten tank gasket screws

wrong belt tension belt rubbing on pulley sheaves foreign matter in fan bad fan

4.2 Figure 5-7 Figure 5-7

MISCELLANEOUS PROBLEMS

Symptoms

no laser spot visible

oil on floor near  tank

6.12 see Caution below 9.10

Note: If an error message appears, refer to Section 11 for an explanation of the message and its  possible cause. CAUTION: If cleaning laser aperture, do not look into the beam. Turn off laser before inspecting.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 7 – Fault Isolation

7.2 COMPUTER AND COMPUTER PERIPHERAL PROBLEMS 7.2.1

PROBLEMS BOOTING THE COMPUTER

Symptoms

Possible Causes

Recommended Action

can’t boot

corrupted hard drive boot sector  loose hard drive controller  board bad hard drive bad computer

boot from floppy disk and rebuild the hard drive reseat board

7.2.2

replace drive replace computer  

Go To…

6.15

DATA STORAGE & RETRIEVAL PROBLEMS

Symptoms

Possible Causes

Recommended Action

intermittent problems

loose boards in computer

reseat boards

bad floppy disk (media)

reload, run setup program

can’t format can’t archive to floppy disk can’t archeive to JAZ drive

can't mount optical disk cartridge

can't archive to optical disk

can't locate files on optical disk erratic date and time

Go To…

bad floppy disk drive bad floppy disk (media)

insert new 1.2 MB 2 HD floppy disk

bad floppy disk drive

replace drive

bad JAZ cartridge

replace cartridge

bad JAZ drive

replace drive

cartridge not fully inserted

reinsert cartridge

bad cartridge

replace cartridge

bad optical disk controller  board

replace board

bad optical disk drive

replace drive

cartridge is write protected

write-enable cartridge

cartridge is full

insert a new cartridge

bad cartridge

send to Hologic for data recovery

bad optical disk controller  board

replace board

bad optical disk drive

replace drive

weak computer clock battery

replace battery

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Symptoms

Possible Causes

Recommended Action

unable to view scan

bad sector on hard drive

repair with Norton Disk Doctor and Norton Speed Disk

unable to view scan graphics  (text OK)

bad display board

replace board

7.2.3

Go To…

GETTING TROUBLESHOOTING HELP

When the computer boots at power-up or reset, Windows 95 (or later) scans the memory and   peripherals and performs a cursory check on them. If there is a problem, the monitor displays the device causing the error. If the computer finds a faulty device, here are some things you can do to find and correct the problem:

3 Double-click on Troubleshooting

1 Click on

2 Click on

Start 

4 Select desired 

 Help

topic.

Figure 7-1. Getting Computer Troubl eshooting Help You can find information if you have trouble: •  printing

•

starting Windows

•

running MS-DOS programs

•

using the network 

•

using your modem

•

using Dial-Up  Networking

•

using Direct Cable Connection

•

using a PC card(PCMCIA)

You can also find information if you:

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 7 – Fault Isolation

7.2.4

•

need more disk space

•

run out of memory

•

have a hardware conflict

TROUBLESHOOTING “ BOOT” PROBLEMS

If you can not boot the computer, that is Windows does not appear on the monitor, you can boot in a restricted mode by doing the following: 1. Boot the computer  Windows displays the following: Starting Windows 95. . .

2. While this message is displayed on the screen, press . 3. From the menu displayed, select the boot mode desired by highlighting using the or typing in the corresponding number and pressing . Windows allows you to boot in eight different modes in order to isolate problems. The following table describes the different modes: No.

Command

Function

1 2

Normal Logged (\BOOTLOG.TXT)

3

Safe mode

4

Safe mode with network support

5

Step-by-step confirmation

6

Command prompt only

7

Safe mode command prompt only

8

Previous version of MS-DOS

Normal boot Normal boot but creates a log file called bootlog.txt located in the root directory (C:\) on the C drive. This file contains information about which files loaded correctly. Starts Windows using a basic configuration. The system may not operate as usual but you can make changes and reboot. Starts Windows using a basic configuration but includes network capabilities. Starts the computer normally but prompts you at every step before continuing. Boots as normal but does not bring up Windows. You can start Windows by typing C:\WIN. Starts the computer with a basic configuration and does not start Windows. Starts MS-DOS using files that were backed up during Windows Setup. The version of MS-DOS depends on what version you were running before the current version of Windows was installed.

7.3 WINDOWS®  NOTES The Hologic System software runs under Windows 95 (or later). This section gives a brief  summary of the features of Windows 95, how to use the mouse, where to find help and how to start an application.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

7.3.1

WORKING WITH WINDOWS Button

The Buttons

Definition Cascade or view layered windows Minimize window and place in taskbar  Maximize size of  window Exit and close window

The Window

7.3.2

USING THE MOUSE

Abcd ef ghi jklm. Text Field 

Cursor 

Text Cursor 

Left Mouse Button

7.3.3

The Mouse - When directed  to select (or “click” on) a  button or field, move the mouse until the cursor  overlays the object and  press the left mouse button. When selecting a text field, the text cursor appears within the text. Use the keyboard to edit the text.

SELECTING PROGRAMS AND APPLICATIONS

The following shows several ways to select an item in a window:

1  Double click  on the desired item using the left mouse button.

2 Select the item with one click of the mouse  button.  Select File in the menu bar using the left mouse button.  Select Open using the left mouse button.

3 Select the item using the left mouse button. Press F then O.

4 Select the item using the left mouse button. Press .

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 7 – Fault Isolation

7.3.4

GETTING WINDOWS HELP

You can find general information on Windows 95 by:

1 Select Start 

2 Select Help

3 Use the Help Topics window to find your  information

7.3.5

GETTING MORE INFORMATION

You can find more information in the following locations: If you have…

Read the file…

trouble setting up windows

C:\WINDOWS\Setup.txt

other trouble

C:\WINDOWS\Readme.txt

7.3.6

GETTING HELP WITH AN APPLICATION

To get help with a selected application:

1 Select Help 2 Select Help Topics Note: You can also  press .

The following screen appears:

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

Select the help facility you are looking for from this window.

7.3.7

GETTING HELP IN A DIALOG BOX

If a dialog box appears, you can get help on any field or tab by doing the following:

1 Click on the Help button.

2 Move the Help Cursor  to the part of the dialog box that you need information about. (In this case, the  preview screen).

3 After Clicking the right mouse button, a pop-up  box appears with information on the selected item.

7.4 TESTING COMPUTER PERIPHERALS 7.4.1

THE COMPUTER PERIPHERALS

The computer peripherals consist of: External

1. the printer  2. the monitor  3. the keyboard  4. the mouse Internal

1. the floppy drive 2. the C-drive

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 7 – Fault Isolation 3. the CD-ROM 4. the magneto-optical drive (if installed) 5. the JAZ drive (if installed) You can perform a few simple checks on these peripherals using Windows.

7.4.2

THE COMPUTER AT A GLANCE

To do a quick check on the various peripherals on the computer: 1. Make sure you are in the Windows operating system. Note: If you are at the Hologic main menu, press , then type EXPLORER.

2. Minimize all the open windows on the screen by clicking on the right-hand corner of the window (if present). 3. Double click on

button in the upper 

(Explorer).

The following window appears:

Floppy Drive Hard Drive JAZ or M/O Drive CD-ROM

You should see all the drives currently on the computer. If not, there is a problem. 4. Double click on “Printers”. The following window appears:

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

Printer currently installed on the computer.

You should see all the printers (usually just one) currently on the computer. If not, there is a  problem. Checking the Disks

1. At the Windows Desktop, press to go to the DOS prompt. 2. At the DOS prompt, type CD .. to go to the root directory. 3. Then type SCANDISK. The following window appears:

SCANDISK is a Windows utility that scans the disk for proper directory structure, lost files, disk  errors, etc. You can run SCANDISK on the three disks listed in the dialog box above. 4. Insert a scratch disk into the floppy drive or into the removable disk (magnetooptical or JAZ, if installed) and press Start. This gives you a confidence check on the selected disk. Note: When you boot the computer, Windows scans the C-drive according to the Hologic startup file installed in the QDR 4000. So you may want to limit disk scanning to the removable drives and leave the C-drive for the automatic scan. If the C-drive had a  problem, you would not be at this point anyway. Returning to the Hologic Main Menu

If you are in Windows, to get to the Hologic Main Menu, the best way is to reboot the computer. This way, all the system parameters are set up properly.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 8

8. PREVENTIVE MAINTENANCE 8.1 CUSTOMER PREVENTIVE MAINTENANCE In the QDR 4000 User’s Guide, Hologic requires the customer to run a daily scan of the spine  phantom supplied with the QDR 4000, add that scan to the QC database, and to apprise Hologic Field Service if the CV of the database exceeds 0.5%. Other than daily cleaning of the unit, no other regular maintenance activity by the customer is required or recommended.

8.2 RECOMMENDED FIELD SERVICE PREVENTIVE MAINTENANCE Hologic strongly recommends that the following procedures be performed by trained service  personnel at least once per year, and preferably at six-month intervals: Note: Archive all databases and all scans before proceeding.

1. Copy AUTOEXEC.BAT and CONFIG.SYS files onto the floppy disks kept by the service person. 2. Scan and analyze the spine phantom, and examine report for abnormalities. 3. Check filter wheel phasing as described in SECTION 4.2. 4. Check beam alignment and detector sensitivity as described in Section 4.5. 5. Run DEFRAG.EXE (C:\DEFRAG). 6. Run SCANDISK.EXE (C:\SCANDISK). 7. Run ONDISK from the DOS [C:\MENU] prompt (if SCANDISK is not available). 8. Run 20 spine scans and verify calibration as described in Section 4.10. 9. Measure scatter, leakage and patient dose as described in Sections 4.8 & 4.9. 10. Check for reproducability as described in Section 4.11. 11. Verify, during a scan, that pressing in the red STOP switch immediately stops all carriage motion and causes X-ray production (as monitored by a radiation meter) to cease immediately. 12. Verify, during a scan, that turning the X-RAY ENABLE keyswitch to OFF immediately stops all carriage motion and immediately causes X-ray production to cease. 13. Verify visually that all panel grounds are connected. 14. Check X-ray tube voltages and current as described in Section 4.3. 15. Check output voltages of low-voltage (+15 VDC, 5 VDC), stepper motor (28 VDC). 16. Clean cabinet interior. 17. Clean the computer fan. 18. Clean leadscrews by wiping with clean cloth. DO NOT use cleaner or oil. 19. Clean rails by wiping with clean cloth. DO NOT use cleaner or oil. 20. Inject recommended grease into grease fittings on rail sliders 21. Clean all exterior metal and Lexan surfaces. CAUTION: Do not use cleaners containing ammonia on Lexan.

22. Clean monitor screen, keyboard and printer.

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Copyright 1998 by Hologic, Inc. All rights reserved.

8-1

Section 9

9. COMPONENT SUMMARY INFORMATION 9.1 SCSI INTERFACE BOARD This board is required only if a JAZ drive option is present. To function properly, the board's EPROM (in position U4) must be removed, and all jumpers (W1 through W5) must be removed as well. The SCSI board is not field-repairable.

9.2 TIMING & CONTROL BOARD E2 E1

2

40

2

20

2

40

1

38

1

18

1

38

SW1 E3

JP4

E4

1

SW2

SW3

2

6

ASP2

Figure 9-1. Timin g & Control Board Switch Settings SW1

1 2 3 4

Closed Closed Open Open

SW2

1 2 3 4

Closed Closed Closed Open

SW3

1 2 3 4

Closed Closed Closed Closed

Power and Jumpers  ASP2

1

Ext. Rtn.

2 3 4

Ext. 5 VDC Line Rtn. Line

JP4

1-4

9.3 MAIN DETECTOR ASSEMBLY The Main Detector Assembly (Figure 5-6) is not field repairable. WARNING: Be careful when working around the detector, as it operates with a supply voltage of approximately -700 VDC, which is present whenever breaker CB1 is on (even though the Keyswitch and Instrument Power Switch are off).

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

9.4 LASER ASSEMBLY The pointing laser is a solid-state Class II unit with a power output of less than 1.0 mW. It is not field-repairable.

9.5 DETECTOR PMT HIGH VOLTAGE POWER SUPPLY WARNING: The detector PMT power supply is a DC/DC converter, accepting +15 VDC at its input and producing an output of up to -1 kV. The output voltage is adjustable, and is set (to approximately 500 VDC) in accordance with the procedure outlined in Section 4.6. Note: The PMT HVPS is not field-repairable.

9.6 STEPPER MOTOR CONTROLLER BOARD The Stepper Motor Board is located in the computer (see Figure 5-8). J1 40

1

21

U20

1 40 1

1

2

20 15 16

16 15

21

U21

J2 2

15 16

J3

20

1 2

J4 2

1

2

1

SW4

SW3

SW2

SW1 15 16

15 16

Figure 9-2. Hologi c Stepper Motor Contr oller B oard Switch Settings SW1

1 2 3 4

Closed Closed Closed Closed

SW2

1 2 3 4

Closed Closed Open Open

SW3

1 2 3 4

Closed Closed Closed Closed

SW4

9.7 STEPPER MOTOR Connectors J1

9-2

Pin

Signal

1 2 3 4 5 6

XSM1 NC XSM3 XSM4 NC XSM6

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Copyright 1998 by Hologic, Inc. All rights reserved.

1 2 3 4

Closed Closed Closed Closed

Section 9 – Component Summary Information

9.8 STEPPER TRANSLATORS The Stepper Translators are located in the base assembly (see Figure 5-1). T S 1

T S 2

1

8

7 1

Figur e 9-3. Stepper Translato r  TS1

Connection

X Translator

D1 D2 D3 D4 D5 D6 D7 D8

To D2 To D1 X COM NC X AWO NC X DIR X PULSE

To

* * * *

Y Translator

To D2 To D1 Y COM NC Y AWO NC Y DIR Y PULSE

To

* * * *

* Distribution board  TS2

Connection X Translator

1 M1 M2 P1 M3 M4 P2 •

NC XSM1 XSM2 +28 VDC XSM3 XSM4 28 V RET

To

* * P.S. * * P.S.

Y Translator

NC YSM1 YSM2 +28 VDC YSM3 YSM4 28 V RET

To

** ** P.S. ** ** P.S.

X-Stepper Motor ** Y-Stepper Motor 

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

9.9 SIGNAL DISTRIBUTION BOARD Timming & Control (+5VDC & timing pules output)

Y Counter 

L/R Limits

F/B Limit Switch

J2

J4

J5

J1

J9

J10    )  .   s   g    i   s    l   e   e    l    h   o    W   r  .    t    t   n   l    i   o   f    C    &   &  .   g  g   n  m    i   e   m ,    i  .    T   l   r    t   n   c   y   a   r      X    (

   l   o   r   )    t   s   n   l   o  a    C  n   g    &   i   s   g   D   n   /    i    A    (   m    i    T

   )   r   d   e  e    l   e    l   o   r   p   s    t   n  r   o   o   t    C  o   r   m   o    t   o   Y    &    M    X    (

J13

  r   )   e   t   n    l    l   u   o   r   o    t   n  c   o  n   o    C   i   r   t   o  o    t   o  m    X    M    (

J14

Laser Pwr. & Emg. Stop  A/D Pow er   Line J6

J7

J8    l   e   n   a    P    t   n   o   r    F

J11    l    )   o   r   s    t   e   n   h   o  c    C   t    i    &  w   s   g   t   n   i    i   m    i   m    l    i    T   (

  s    l   a   n   g    i    S    D    /    A

J22

   )   n   o   r   i   e    l    t   c    l   e   o   r   r   i    t   n   d   o  r   o    C    t   r   o   o  m    t   o   Y    M    &    X    (

  r   )   e   t   n    l    l   u   o   r   o    t   n  c   o  n   o    C   i   r   t   o  o    t   o  m    Y    M    (

J15

J16

X-Ray Cntrl, Filt Wheel & Pickoff sigs.

Power Supply (±15VDC, +5VDC, timing pulse input)

J17

J18

Emg & Aux Relay Pwr.

Stepper  Translator  Controls

J19

J20

  s    t   u   p   n    I   r   e    l    l   o   r    t   n   o    C   y   a    R      X

   2    1    J

   4    2    J

J21

X-Motor  X-Motor  Power (In) Power (Out)

Figure 9-4. Signal Distr ibut ion Board

9.10 TANK ASSEMBLY WARNING: This sealed assembly contains the X-ray tube, high-voltage transformer and other  circuitry needed to generate alternating 70 kVp and 140 kVp X-ray pulses. The unit is oil-filled, weighs approximately 200 lb (90.9 kg), contains potentially lethal voltages internally, and is absolutely not  field-repairable. Externally mounted  components (filter wheel, filter wheel motor, filter wheel pickoff, collimator  selector assembly, etc.) are field-repairable, however. However, the fastening screws may be checked and tightened if minor oil leaks are apparent.

If the tank assembly is replaced, the beam alignment must be checked and adjusted as described  in Section 4.1, and the system recalibrated as described in Section 4.8.

9-4

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 9 – Component Summary Information

Table 9-1.Tank Termin al Signals Terminal Strip

TS 1 TS 2 TS 3 TS 4 TS 5 TS 6 TS 7 TS 8 Ground Stud

Signal Name

Description

PRIMARY+ PRIMARY– FILCS– FILAMENT_NEUTRAL FILAMENT_LINE FILCS+ HV_SENS_– HV_SENS_+ Safety Ground

High-Voltage Transformer Primary High-Voltage Transformer Primary Return Current Sense Return Filament Transformer Primary Return Filament Transformer Primary Current Sense High-Voltage Sense Return High-Voltage Sense Tank Enclosure & High-Voltage Transformer Secondary Center-tap Ground

Table 9-2. Tank Torque Specifi catio ns Location

Torque Specifications

Set wrench to…

Lexan Cup

10-12 in-lb

11 in-lb

Bladder Gasket

10-12 in-lb

11 in-lb

Transformer Seal

70 in-lb

70 in-lb

Tank Cover Gasket

36-40 in-lb

38 in-lb

9.10.1 TANK TOP COMPONENTS AND SCREW LOCATION The following figure shows the Tank Top and the locations of the seals:

Lexan Cup

Bladder Gasket Tank Cover  Gasket Xformer (hidden) Seal

Front

Figure 9-5. Tank Assembly (top view, covers removed)

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

9.10.2 LEXAN CUP TIGHTENING SEQUENCE Tighten the Lexan Cup seals in the f ollowing order using the torque settings in the above table:

1 3

6

5

4 2

Figur e 9-6. Lexan Cup 9.10.3 TANK BLADDER GASKET TIGHTENING SEQUENCE Using the torque settings in the table above and referring to the figure below, tighten the Bladder  Gasket screws as follows: 1. Tighten screw #1, then #2, then #3, then #4. 2. From the screw after #4, tighten every other screw in a clockwise direction, returning back to #4. 3. In a clockwise direction, tighten all the remaining screws.

1

4

3

2

Figur e 9-7. Bladder Gasket 9.10.4 TRANSFORMER SEAL TIGHTENING SEQUENCE Tighten the Transformer Seal screws using the torque settings in the table above and the sequence in the figure below.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 9 – Component Summary Information

2

4

1

3

Figure 9-8. Transformer  9.10.5 TANK COVER GASKET TIGHTENING SEQUENCE Refer to the figure below and the torque settings in the table above and do the following to tighten the Tank Cover Gasket screws: 1. Tighten screws #1 through #6 in the sequence as indicated. 2. Starting at the screw next to screw #6, move in a clockwise direction and tighten every other  screw. 3. Repeat this pattern in a clockwise direction and tighten all remaining screws. 5

1

3

FRONT

6

2

   L    A    C    I    T    I    R    C    T    S    O    M

4

Figur e 9-9. Tank Cover Gasket Note: The 3 Tank Cover Gasket screws at the rear of the tank and shown above are the most critical screw locations for oil leaks. Always check these screws if a leak is suspected.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual Important: Do not remove screws located on the tank. Under normal conditions, there is no reason to loosen or remove any screws on the tank.

9.11 X-RAY CONTRO CONTROLL LL ER BOARD (XRC) (XRC)

L1

J2

F1

TP2

F2

J1

L2 C12

TP12 TP1 J8

C18 TP3

J4

TP4

PTC1

TP11 J6

R38

TP5 TP6

D20

D17 J5

R39

J7 TP7 TP8

D23 PTC2

D24 D29 D30

TP9

J3

TP10 D33

Figur e 9-10 9-10.. X-Ra X-Ray y Contr oll er Bo ard LEDS

D17 D20 D23 D24 D29 D30 D33

W arm Up +5 V OK Trim Enable X-Ray Enabled 1 X-Ray Enabled 2 Zero Cross +12 V OK

FUSES

F1 F2 R38 TP1 T P2 T P3 T P4 T P5 T P6

XRC Line 1 XRC Line 2 HVRef+340 VDC Return +340 VDC Prim + Prim H/V Sense H/V Sense +

POTENTIOMETERS

TEST POINTS

9-8

!

JACKS

J1 J2 J3 J4 J5 J6 J7 J8

To X-ray tank XRC Line Input Filament AC Filter W heel AC {Many Signals} Filter W heel Pickoff Signal Filament Sense and H/V Test Points Fan AC

R39 TP7 TP8 TP9 TP10 TP11 TP12

HVRef + Filament Current + Filament Current Neutral Filament Line Filament Neutral Filter W heel Pickoff Signal XRC Line 1 (120 VAC)

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 9 – Component Summary Information Information

9.12 A/D CONVERTER B OARD The A/D converter board is not field-repairable, field-repairable, but its proper operation can be assessed using SURVEY as described in Section 10.3.4.

7

J3 1

19

37

1

20

J1 25

13

14

1

J2

U3

Figure 9-11. Analog to Digital Converter Board

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Copyright 1998 by Hologic, Inc. All rights reserved.

9-9

Section 10

10. SOFTWARE 10.1 SOFTWARE INSTALLATION AND UPGRADES 10.1.1 PROTECTION OF CUSTOMER'S FILES •

Always archive the customer's patient database and QC files before performing any work that involves writing to the hard disk. Use a separate set of new disks, not the customer's regular database archive diskettes.

•  Never format or partition the hard disk without first archiving the patient database, the QC files, and all of the scans on the hard disk. •  Never power down or reboot during a scan, or while the computer is accessing the hard  disk. Powering down and rebooting may be safely accomplished only by selecting sHutdown and the Hologic main menu.

10.1.2 INSTALLING SOFTWARE OPTIONS A wide variety of software options are available for the QDR 4000. Normally, these are factoryinstalled, but in those instances where an option is to be installed in the field, the option kit includes a Release Note which describes in detail how to load the option software.

10.1.3 INSTALLING SYSTEM SOFTWARE UPGRADES From time to time, Hologic distributes System Software upgrades which incorporate improvements and additional features of general utility. Each upgrade kit includes a Release  Note which describes in detail how to load the new version of system software.

10.1.4 DEINSTALLING HOLOGIC SYSTEM SOFTWARE CAUTION: Always perform a dBarchive before deinstalling the system sof tware.

To deinstall Hologic V9.5 software, do the f ollowing: 1. Perform a dBarchive. 2. Exit all Hologic software, including: •

the current DOS box

•

the Hologic background printing program, holprint.exe

3. At the Windows Desktop, select [Start], then [Programs], then [MS-DOS Prompt]. 4. In the MS-DOS window at the C:\WINDOWS> prompt, type CD\. 5. At the C:\> prompt, type ATTRIB -R -H -S SQUID.DAT. 6. At the C:\> prompt, type DEL SQUID.DAT. 7. Delete folders by typing DELTREE followed by the appropriate folder, then . Example: DELTREE MENU. Answer "yes" to deleting the folder and all the files it contains.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual Delete the following folders: • MENU • SCAN • UTIL • XCDATA • FLANGENG

8. Delete files by typing DEL followed by the appropriate file, then . Example: DEL SYSTEM.PRX. Delete the following files: •

SYSTEM.PRX

•

STANDARD.TBL

•

SCONFIG.TXT

•

VALIDOPT.TXT

•

LINST*.*

•

AWKI.EXE

•

WREBOOT.EXE

9. Exit the MS-DOS window (C:\>EXIT). 10. Reboot the computer.

10.1.5 REINSTALLING HOLOGIC SYSTEM SOFTWARE To reinstall Hologic V9.5 software, do the following: 1. At the Windows Desktop, select [Start], then [Programs], then [MS-DOS Prompt]. 2. At the C:\>WINDOWS> prompt, type CD\. 3. At the C:\> prompt, type SET ASKMACHINE=1. 4. Insert V9.5 diskette one (1) into drive A:. 5. At the C:\> prompt, type COPY A:\*.EXE. 6. At the C:\> prompt, type LINSTALL. 7. Follow the instructions on the screen to install the system software. When prompted, indicate the model type for this installation. 8. When you are instructed to, reboot the system. 9. Answer "yes" to initialize patient and QC databases. 10. At the Hologic Main Menu, select [Utility], then [Service], then [dbManagement] then [dbRecover]. 11. Insert the last (only if there is just one disk) into drive A: and press . 12. Press again to do a complete database recovery. 13. Insert the remaining dBarchive disks (if any) as prompted by the recovery program. 14. Reinstall Hologic V9.5 System Software after the dbRecover operation through Utility/Upgrade.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 10 - Software 15. If applicable, install the Version 9 System Software Patch disk through Utility/Upgrade. 16. Install the Option disks (U.S. Reference Database, NHANES, Forearm, Low Density Spine, etc.) using Utility/Upgrade. 17. Install OnePage. 18. Install Background Printing. 19. Verify that the port and spool settings in Windows Printer Properties are correct. 20. Perform five (5) QC scans and inspect BMD, BMC, and Area plots. 21. Archive a phantom scan and restore the scan to the hard drive. 22. Perform dBarchive.

10.2 FILE ORGANIZATION This section gives an overview of file organization in the QDR 4000. It assumes that the reader  has a good working knowledge of MS-DOS file organization. The QDR 4000 always contains two physical drives, and may contain one or two others. Remembering that MS-DOS drive designations always end with a colon, 1. The 3.5" floppy drive is always identified as drive A:. 2. The CD-ROM is identified as drive E:. 3. The hard drive is identified as drive C:. This drive contains all the Hologic software. 4. The JAZ drive, if installed, is identified as drive D:. The hard drive is further divided into several directories: Folder, Extension or  Program

Boot Folder  (C:\) \MENU

.EXE .MSG,.NDX

.BAT \DOS

\UTIL

Explanation

This contains the AUTOEXEC.BAT and CONFIG.SYS files, which are read by DOS at boot up. This folder contains most of the Hologic executable programs. It contains all the programs that can be executed from the Hologic main menu. During standard operation of the software, this is always the "current folder". Fi letypes stored here can be identified by extension: Executable programs Help files. These come in pairs, with the .NDX being an index into the .MSG file. On newer systems, these files are stored in the language directories (FLANGENG, etc.) Batch programs. Examples are COUNTRY.BAT and ENVIRON.BAT which are invoked at bootup. This folder always contains MS-DOS executable files. It may also contain Hologic executable tools. These Hologic programs are ordinarily invoked from the DOS prompt, by service personnel, and are not used in day-to-day operations. On the most recent Hologic software releases, the Hologic executable tools have been moved from \DOS to this folder.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual

Folder, Extension or  Program

\SCAN\60HZ

\SCAN\50HZ \FLANGENG

Explanation

This folder contains ASCII protocol files that control the scanning operation. There is one of these files for each scan protocol available on the system. These files all end with the extension .PRO. In addition, the ASCII file RATE.DAT describes various stepper motor characteristics at 60 Hz operation. This folder contains the same files as \SCAN\60Hz, except for 50 Hz operation. On System Software versions 6.01 and higher, this folder contains text, help, menu and message files that are specific to English language operation. It also contains the executable file SETQPRM.EXE, which loads the QDR Parameter  area with English-language values. Other files are identifiable by extension: .TXT These contain text messages for specific Hologic programs.

.MSG,.NDX Help files (see \MENU, above).  ANALYZE.PRO LANG.NAM

This is the translated analysis protocol file. This short ASCII file simply contains the language name. ANALYZE.PRO and the .DAT files correspond to "master" copies kept in \XCDATA. Each foreign language folder contains a translated copy of these files.

\FLANGFRN

This folder contains text, help, menu and message files that are specific to French language operation.

\FLANGDEU

This folder contains text, help, menu and message files that are specific to German language operation. This folder contains data files, master menu files and database-definition files. Data for each scan is kept in two or three files, with names in the form:

\XCDATA

P*.P* Processed data contains analysis results and the presentation frame. P*.R* Raw scan data. where the name portion of the filename is identical for the files of a single scan. The patient-scan database contains the patient biographies and the results of  all the scans that the system has performed (or that have been restored to the hard disk of this system). It is kept in files: PATSCAN2.H PATSCAN2.DBD PATBIOG2.DAT PATBIOG2.KEY PATBIOG2.KE1 PATSCAN2.DAT PATSCAN2.KEY PATSCAN3.H PATSCAN3.DBD PATSCAN4.H PATSCAN4.DBD XPATSCN2.DAT OPTICAL.DAT

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Section 10 - Software Folder, Extension or  Program

Explanation

OPTICAL.KEY The normals curve database contains the reference curves provided in the original software and added to the system by the user: NCURV3.H NCURV3.DBD NCURV2.DAT NCURV2.KEY The QC database contains stored scan results (generally of phantoms) and QC setup information: QCDB4.DBD QCDB4.H QCDB5.DAT QCDB5.KEY QCSCALE2.DAT QCSCALE2.KEY The file XCSYSTEM.DAT contains the currently selected scan. The file ONDISK contains the list of scans currently on the hard drive. .DAT files are menu files that contain all the text that the user sees during menu selections. Not all menus are supported this way. Those that are include:  ANALYZE.DAT Menu selection within ANALYZE. MAINP.DAT Hologic Main Menu SCAN.DAT Scan selection UTILITYP.DAT

Utility Menu

A note on Workstations

AC-1000 workstations contain no scanning hardware. Therefore the directories \SCAN\60Hz and  \SCAN\50Hz do not appear. Neither does the Scan selection on the Hologic Main Menu, nor the  Local selection on the Utility Menu. The file COUNTRY.BAT is not invoked at bootup, so no attempt is made to determine line fr equency. In addition, various executable files that control the hardware are erased at the factory during software installation.

10.3 MAINTENANCE, SERVICE AND DIAGNOSTIC SOFTWARE 10.3.1 THE CALIBRATION UTILITIES DISK Many of the calibration programs are on the Calibration Utilities Disk (099-0560). You must insert this disk before running them and type A: program_name. The Calibration Utilities disk contains:

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Program

Description

 AUTOCOMP.BAT  AUTOSCAN.EXE BACKLASH.EXE FSCAL.BAT LAVRCV.EXE MOTION.EXE MOTORX.EXE MOTORY.EXE RECALYZE.BAT SURVEY.EXE

automatically analyzes, by comparison, 20 spine scans. automatically performs multiple scans of an object according to selected criteria. aligns alternating scan lines for data acquisition. calls the qcfsu.exe calibration program with the appropriate parameters. calculates the average, CV (coefficient of variation) and linearity of  previously analyzed scans in the database. enable/disables motion detection. operates the x-motor. operates the y-motor. recalibrates scan with new correction factors. operates the QDR 4000 in various modes.

Note: All the programs contained on the utility disk are not listed above—only the ones needed   by the service engineer. Some of the ones not listed are used in manufacturing and some are called by other programs.

10.3.2 THE UTILITY PROGRAMS This section describes software available for use by Field Service personnel. Unless otherwise noted, all routines are accessed from the DOS [C:\MENU] prompt by typing the program name and pressing . Many programs automatically return to DOS upon completion. Programs which do not return automatically to the DOS prompt can be exited by pressing . To get to the DOS prompt from the Hologic Main Menu, simultaneously press . To return to system software from the DOS prompt, type MAINMENU. Program

 AUTOSCAN

Description

allows multiple scans of a phantom to be made, one after another, without operator intervention. The scan type and number of scans must be specified, and other scan parameters may also be specified by appending one or more modifiers to the AUTOSCAN name. Usage: AUTOSCAN [-options]  AUTOSCAN options: -D

delete scans after acquisition

-En

type ‘n’ keys to select resolution

-Hn

type ‘n’ keys to select resolution

-Lyy

set scan length to ‘yy’ in/cm (defaults to 6.004"/6.020 cm)

-M

do NOT reposition motors between scans

-Nnn

perform ‘nn’ scans (default value = 1)

-O [file] log acquired scan filenames for use with AUTOANALYZE (for factory use only). Default filename is AUTOSCAN.LOG.

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Section 10 - Software Program

Description

-Pxxxx use scan menu file xxxx -Sss

set scan line-to-line spacing to ss in/cm (defaults to 0.0395"/0.1003 cm)

-Tt

Select scan Type from SCAN menu file

-Wxx

set scan width to ‘xx’ in./cm (defaults to 4.83"/5.136 cm)

-Xxx -Yxx

set maximum continuous X-ray on time (seconds) X-ray duty cycle after maximum on time (percent)

? or -?: display this help menu Example: AUTOSCAN -TS -N10 will execute ten fast spine scans

 AVRSCAN

finds the averages (means) and coefficients of variation (CV) of K, d0, area, BMC and BMD for a selected set of scans. Each scan chosen to be part of the set is highlighted by typing a "+"; after all scans to be averaged have been tagged, pressing will display the average and CV for  each parameter.

BACKLASH

measures the amount of mechanical backlash present in the scanning mechanisms, and calculates corrections that make the display appear as if it had been acquired on a backlash-free system. Without correction, straight lines may appear wavy, and scan edges can have the appearance of ripple-cut French fries. Place a coin on the table, center the laser spot on the coin, then escape to DOS, type BACKLASH and press . All further operations are fully automatic, and the program terminates with X-axis and Y-axis backlash compensation values (measured in motor steps) stored in the SCONFIG.TXT file.

Figure 10-1. Backlash Compensation

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Program

Description

CHKDSK

displays the following information about the disk drive: - the serial number of the volume - of total disk space (in bytes) - available on disk (in bytes) - the size of each allocation unit (in bytes) - number of allocation units on the disk - total memory (in bytes) - total free memory (in bytes) Note: To check the disk for errors and repair them, it is better to use SCANDISK.

COUNTRY DATE DATES DBCHECK© DBMAN

automatically configures system for 50 or 60 Hz operation displays the current date in the computer's internal clock, and allows that date to be changed if desired. allows the selection of English or European format for date display checks a specified database (example: DBCHECK PATSCAN2) for errors, and reports any found. Copyrighted by Raima Corporation. moves scans and patient information into (or deletes such information from) the PATSCAN2 database. Note: Hologic strongly recommends running DBARCHIVE before running DBMAN, so that the original database can be restored in case of operator  error.

INITDB©

initializes a specified database, clearing all previous entries. Copyrighted by Raima Corporation. Note: Note: Think carefully before using INITDB. Example: database. Example:

INITDB PATSCAN4 will erase all entries from the patient INITDB QCDB4 will erase all entries from the QC database.

CAUTION: Always run DBarchive before running INITDB. Failure to do so will result in the permanent loss of data. Program

Description

KEYBUILD©

corrects problems with .KEY files. Copyrighted by Raima Corporation.

MAINMENU

returns control to the system software.

FSCAL

automatically changes ENVIRON.BAT to reflect the corrected BCF.

MOTION ON

disables the motion detection safety system, which normally monitors X- and Yaxis carriage motion during a scan and shuts down the X-ray source if motion failure is detected on either axis. Note: Do not leave the system for use with patients without invoking MOTION OFF and restoring safety system operation.

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Section 10 - Software

Program

Description

MOTION OFF

re-enables the motion detection system.

MOTORX, MOTORY

control and monitor the X-axis and Y-axis drive stepper motors. Written primarily for use by Engineering, they serve in the field as means for isolating the cause of  motor stalling (by changing the stepping rate), and for monitoring the manual motion request switches, limit switches and Motion Counter board outputs. The MOTORX display, which is typical, is shown below. Note: See Section 10.3.3 for more information on MOTORX and MOTORY.

ONDISK

checks the hard disk for patient files not currently in the database, and adds any that it finds. Safe to run anytime.

PAD

allows laser on/off control and control of table and arm motion from the keyboard. Pressing any key 0-4 or 6-9 on the numeric keypad initiates the indicated action. Pressing stops it. Motor Control Pad

7

8 IN

PgUp 9(HomeX)

(X)

4LEFT

5

6RIGHT

(Y)

1

(Y)

2OUT

PgDn 3(HomeY)

(Y)

0POSITION

. LIGHT

Figur e 10-2. PAD Prog ram Display

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Program

Description

RECALYZE

run on older scans whenever the bone correction factor (BCF) is changed in the ENVIRON.BAT file. Adjusts the BMC of older scans to be within 0.5% of the BMC value printed on the phantom label (Section 4.10.2). Example: C:\RECALYZE after the desired scans have been selected. checks and repairs disks under Windows. when scans are copied via DOS, running SCANTODB will add them to the database. Example: MODSCREC \XCDATA\P*.P* displays the current DOS path, line frequency, Q-numbers, machine model number (QDR 4000) and serial number. Performance Series machine serial numbers end in "P", others are numeric only. allows monitoring of the A/D converter output, the status of the HVPS, the system line frequency and the instantaneous HI/LO signal values for bone, tissue and air. It also affords on/off control of the X-ray beam and the filter wheel motor, and selection of the collimator. Note: See Section 10.3.4 for more information about the SURVEY  program.

SCANDISK MODSCREC

SET

SURVEY

TIME UNITS

displays the current time in the computer's internal clock, and allows that time to be changed if desired. allows selection of English or metric units for displays.

10.3.3 RUNNING MOTORX AND MOTORY Note: First insert the Calibration Utilities disk (099-0560) into the floppy. X-Motor Status Ready  Motion Complete Run Control Direction Prog Slew Pulse CW Limit Ccw Limit CW Switch CCW Switch  ASCII/BIN Reset DoWhile  Wait  Abort Step Inhibit Local Motion Position Light Homed  Motion

1 1 1 1 1 1 1 1 0 0 0 0 1 1 1 1 1 0 0 0 0

X-Motor Control Command G ASCII/BIN  Number of Steps 05279 Reset Slope 001 DoWhite Rate 050 Wait First Rate 001 Abort Slope Divisor 0 Cy525

command code

1 1 1 1 1

(ASCII).

0000

Figure 10-3. MOTORX Program Display To run the X-axis or Y-axis motor and thereby test the motor and its associated limit switches and Motion Counter board, use the cursor keys to highlight the following lines in the -Motor  Control box, entering the value specified in the table below and pressing .

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 10 - Software PARAMETER

Number Of Steps Slope Rate First Rate

MOTORX

MOTORY

2000 180 127 003

2000 180 50 003

001

001

Slope Divisor

After all five parameters have been entered, highlight the Command line, press to clear  the line, then type + or - to determine desired direction of motion (see table below) and press .

COMMAND

MOTORX

MOTORY

+ -

arm to rear arm to front

arm left arm right

Again press to clear the Command line, then type G and press to initiate motion. Observe the Motion line at the bottom of the -Motor Status box (except in MOTORC): it should  change as the arm moves, verifying proper Motion Counter operation. Repeatedly pressing should cause the arm to reach a motion limit and the CW Limit or  CCW Limit status in the -Motor Status box to change from 0 to 1, indicating proper limit switch operation. Throwing the arm manual control switches should change 0 s to 1 s in the -Motor Status box (thereby verifying proper operation) thusly: SWITCH

arm FORWARD/BACK switch UP arm FORWARD/BACK switch DOWN arm LEFT/RIGHT switch LEFT arm LEFT/RIGHT switch RIGHT

MOTORX

MOTORY

CW SWITCH CCW SWITCH -

CW SWITCH CCW SWITCH

10.3.4 RUNNING THE SURVEY PROGRAM Note: First insert the Calibration Utilities disk (099-0560) into the floppy.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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16-bit A/D Binary Data

X-Ray Status

Readback  Registers

Settings Registers

Error  Counters Filter  Wheel Signals

Function Keys

Legend 

Figure 10-4. SURVEY Program Display In SURVEY, function keys have the following functions: Key

Function

Key

Function



turns X-rays on turns X-rays off turns calibration on



turns calibration off   turns filter wheel motor on turns filter wheel motor off  

CAUTION: Turning the beam on with bypasses the system's normal X-ray safety features. Be especially careful to keep your hands, head and other body parts out of the  beam.

REGISTER

DISPLAY

DESCRIPTION

Chopper

0 or 1

Filter wheel pickoff pulses are detected. 0=no pickoff pulse detected. 1=pickoff pulse detected.

Hi/Lo

0 or 1

Cycles at AC line frequency between 0 and 1 as positive and negative line voltage half-cycles are detected.

Interlock

ON or   OFF

Currently displays the same status that the Emergency register  does.

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Section 10 - Software REGISTER

DISPLAY

DESCRIPTION

Emergency

ON or   OFF

ON when the red STOP button is pushed in or the key switch is off  (emergency status enabled). OFF when red STOP button is pulled out and the key switch is turned to the ON position (normal operation).

HiVoltage

ON or   OFF

ON when X-rays are on. OFF when no X-rays are being generated.

 A/D Readback

16 Individual Bits, each 0 or 1

The output of the Analog to Digital (A/D) Converter board. The bits are displayed in two colors: RED = The bit has not yet changed state since SURVEY has been started or reset by the key. GREEN = The bit has changed state at least once since SURVEY was started or was reset by the key. Pressing the key resets all the bits back to red. This can be helpful in finding any "stuck" bits.

The following six registers display the detected amplitude of the dual energy X-ray pulses after   passing through the three filter wheel segments. The information is displayed as A/D numbers (04095). The higher the number, the fewer X-rays that are hitting the detector. Readings that reach either extreme (0 or 4095) indicate something wrong with the detector or A/D converter. REGISTER

Hi Bone Lo Bone Hi Tissue Lo Tissue Hi Air  Lo Air 

DISPLAY

| | 0-6535 | | |

DESCRIPTION

140 kVp X-ray pulse through bone segment. 70 kVp X-ray pulse through bone segment. 140 kVp X-ray pulse through tissue segment. 70 kVp X-ray pulse through tissue segment. 140 kVp X-ray pulse through air segment. 70 kVp X-ray pulse through air segment.

Note: The A/D "raw" number displayed by SURVEY is inverted relative to the detector output voltage level (4095=0 Volts and 00000=10.0 Volts).

The following registers indicate the results of operator commands to the HVPS\Source and filter  wheel motor. REGISTER

DISPLAY

DESCRIPTION

WarmUp

ON or OFF

Normal state is OFF and should only be ON for approximately 3-5 seconds while the X-rays are coming on or going off.

HiVoltage

ON or OFF

The first of two registers used to enable the generation of X-rays. ON when X-rays are desired (press ). OFF when no X-rays are desired (press ).

X-ray Enable

ON or OFF

The second of two registers required to enable the generation of Xrays. ON when X-rays are desired (press ) OFF when no X-rays are desired (press )

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Copyright 1998 by Hologic, Inc. All rights reserved.

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REGISTER

DISPLAY

DESCRIPTION

Calibration

ON or OFF

Defaults to OFF. A better name would be "PMT dark current offset". When all readback numbers are 3762, the PMT dark current has been cancelled out.

S/W Debug

ON or OFF

Defaults to OFF. A flag used by programmers. Not used by Field Service.

Filter  Wheel

ON or OFF

Indicates the status of the filter wheel motor drive circuitry. turns the filter wheel motor ON. turns the filter wheel motor OFF.

Frequency

50 Hz or 60 Hz

Indicates the line frequency as determined by the Timing & Control board.

Note: SURVEY also has three counters which increment when there is a f ilter wheel pickoff  error or a Hi/Low phasing fault.

All three of the following counters must be at zero before X-rays can be produced. The counters can be reset only by exiting SURVEY (press ) and then restarting the  program. REGISTER

DISPLAY

Pickoff Out Of Phase

0 or a decimal number 

DESCRIPTION

Increments if the filter wheel pickoff is out of phase with the AC line. i.e., if the pickoff pulse occurs during the negative half cycle of the  AC line. If the Pickoff Out of Phase counter is incrementing, the filter wheel can be phased manually by alternately pressing and until the wheel is in phase and the counter stops incrementing. Long filter wheel motor off times improve the chances of the wheel synchronizing with the positive half-cycle of the AC line when restarted.

No Filter  Wheel Pickoff 

0 or a decimal number 

Increments if the pickoff pulse is not detected. This can be due to a fault in the pickoff circuitry or a stationary filter wheel.

Hi-Lo Out Of  Sequence

0 or a decimal number 

Increments if the Hi-Low pulse sequence (as monitored by the Timing & Control board) disagrees with the computer's expectations.

10.3.5 RUNNING FSCAL Note: First insert the Calibration Utilities disk (099-0560) into the floppy.

1. Go to the DOS prompt () if not already there. 2. Type A:FSCAL. The following screen appears:

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Section 10 - Software

3. Type b. The following screen appears:

4. If the information is NOT correct, type n. The following screen appears:

5. Enter the correct information in the screen above and press . The following screen appears if you have just pressed or typed y when asked if  the information is correct:

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6. Select the 20 scans just completed. (Follow the directions on the screen.) The following screen appears:

This screen displays the analysis of the scan values and r ecommends ecommends whether to recalibrate or  not. 7. Select “y” or “n”, depending on the recommendations recommendations and your decision. If you select “y”, the following screen appears:

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Section 10 - Software

If you select “n”, FSCAL returns to the first screen above. 8. Select “x” to EXIT.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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Section 11

11. ERROR MESSAGES The QDR 4000 system software reports four types of error messages. They are: Informational:

These messages are self-explanatory. Examples are instructions to insert or remove diskettes, or notification that a diskette or the system drive is full.

User Error:

The user made a mistake, such as entering invalid data, inserting the wrong diskette or optical cartridge, or positioning a region of interest incorrectly.

Hardware Error:

Messages which may indicate a hardware malfunction (which may be as simple as something not plugged in or turned on).

Software Error:

The QDR software contains numerous "sanity checks" that are used  during software development to indicate that something is wrong. During normal operation, these messages should never appear. If they do, Hologic should be notified.

This document covers only hardware and software errors. Informational and user errors are self-explanatory. The following list specifies, for each error message: •

its category and meaning.

•

when and where it can happen.

•

what action you should take.

The error messages are in alphabetical order, with the exception of messages generated by SCAN in the form: device:  Message

Text

These messages are listed in order by "Message Text". Analysis aborted. d0= ___ below acceptable limit. Hardware or  Software Error:

d0 is found to be below zero, which is not possible if there are X-rays reaching the detector.

Action:

This message should be reported to Hologic. Please include as much information as possible about the scan.

CALIB: Timeout Hardware Error:

Dark current offset calibration was not completed within a reasonable amount of time.

Action:

Check A/D-to-T&C cable; repair or replace as required. Check A/D board, replace if defective.

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual Check supply voltages to A/D board, adjust as required. Check detector, replace if defective.

CALIB: Unknown Error Software Error:

This message should not occur. Report it to Hologic if it does.

Cannot obtain results of scan ________ of __________ Software Error:

For some reason, the system was unable to obtain the results of a scan that you selected for normals plotting. This message should be reported to Hologic.

Can't open a window Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

 device: Chopper Wheel Out of Phase with Xrays Hardware Error:

After successful synchronization at the start of the scan, the filter  wheel got out of phase.

Action:

Check filter wheel phasing, adjust if necessary as described in Section 4.1. Check belt tension, adjust A/R.

Corrupted Scan Data Detected Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Could not find file extension in Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Couldn't write the new record Hardware or  Software Error:

The system was unable to write a reference curve that you entered or  edited.

Action:

Check that the hard drive is not full. That is, check the message "Room for __ scans" in t he status window and ensure that it does not say zero. If it is full, then archive and delete one or more scans and  try again. If the hard drive is not full, then you have either a hard drive failure or a corrupt reference curve database.

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Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages db_File error __ ... or 

db_VISTA error __ ... Software Error:

Any message that begins this way should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

 device: Data Buffer Overflow Hardware or  Software Error:

The device driver which performs the X-r ay scan acquired data faster  than the scan program could write it to disk. This may indicate a hard  drive problem or a problem with the Timing & Control board.

 device: Device Already In Use Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at he time.

Error copying file _________ Hardware Error:

There was an error copying the named file.

Action:

Verify that there was space on the target drive. Check the "Room for  ... " message in the status window. Run appropriate diagnostics.

Error creating file ______________ _________________

Hardware or  User Error:

There is a problem creating a new file (which may be on your  hard drive, your diskette, or your optical). Either the medium is full, or there is a hardware error.

Action:

First determine which disk drive is involved. The filename should  start with a drive letter, followed by a colon. Drive A: is diskette, C: is the hard drive, and E: is optical. If, when you exit from the Hologic main menu, your MENU directory is in drive C:, then C: is hard  drive, otherwise it is optical. Check for disk full. For diskette, simply try a different diskette and  see if the problem goes away. For hard drive, check the "Room for   ___" message in the status window. For optical, go to the \WORM directory and run the program WCHKDSK C:, where "C:" is the drive from the message. If the disk is not full, run appropriate diagnostics.

Error in region of interest structure

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Error reading Optical drive: _______________ Error reading file _______ : __________ Hardware Error:

There was a disk problem while reading a file.

Action:

Run appropriate diagnostics.

Error closing optical file ________________________ or 

Error flushing optical file _______________________ or 

Error writing optical record ______________________ Hardware error:

There is a problem writing an optical file. Either the medium is full, or there is a hardware malfunction.

Action:

Check for disk full. Get out of the Hologic menu (Press ), go to the \WORM directory and run the program WCHKDSK  c:, where "c:" is the drive letter from the message. If the disk is not full, then run the WDIAGS diagnostics.

Failure at file ________ line ____ Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

file extension doesn't start with 'P' in ... Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Garbled Optical File

11-4

Software Error:

The optical file that you are attempting to restore scans from seems to  be clobbered.

Action:

Run diagnostics on the optical drive. If this error recurs, report it to Hologic.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages GetDKernel Internal Software Error or 

GetKernel Internal Software Error Software Error:

These messages should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

 device: Hi/Lo Sequencing Error Hardware Error:

The data points did not correctly alternate between high and low energy.

Action:

Check the Timing & Control board, replace if defective. Check the A-C input reference voltage to the Timing & Control board.

Histogram Overflow in datahist or 

Histogram Smoothing Error or 

Illegal Context Record Type or 

Illegal high value in qgen or 

Inconsistent d0 limits in rsattencalc or 

Indeterminate or bad data for attenuation curves or 

Indeterminate Data For k Calculation or 

Insufficient Data To Determine k/delta0 Software Error:

These messages should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Incorrect version of X-ray device driver Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Internal Buffer Size Exceeded

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Copyright 1998 by Hologic, Inc. All rights reserved.

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QDR  4000 Technical Manual Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Internal Error:.. or 

Internal Software Error: ... Software Error:

Any message that begins this way should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Invalid ... Software Error:

Any message that begins with the word "Invalid" should be reported  to Hologic. Please include as much information as possible about what you were doing at the time.

I/O Error ... Hardware or  User error:

There was an error reading or writing a disk drive. The message should  identify the drive and say something about the nature of t he error.

Action:

If this is an "out of space" error, verify that there is room on the target drive. Check the "Room for ..." message in the status window. Otherwise, run appropriate diagnostics on the disk and controller; if  the problem involves diskette (Drive A:), try a different diskette.

Limit Exceeded: ... Software Error:

Any message that begins this way should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Missing tissue bar initialization file Software Error: The file that contains the calibration information for the tissue bar is missing or has not been installed. Action:

Install the tissue bar initialization software that comes with the tissue  bar.

 device: Motor did not move as commanded

11-6

Hardware Error:

The QDR is equipped with motion detectors which detect actual motion in the X and Y-axis motors. This message occurs when one of these motors was commanded to move and no motion was detected.

Action:

Check for loose leadscrew couplers, tighten setscrews A/R.

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages Check for coupler hitting bearing block, move coupler A/R. Check motion encoder, replace if defective. Check Motion Counter board, replace if defective. Check leadscrew lubrication, lubricate if dry. Check Motion Counter to T&C cable, repair or replace A/R. Check Stepper Motor Controller board, replace if defective Check stepper translator, replace if defective. Check Timing & Control board, replace if defective.

MOTOR__ never went to status ___ Hardware Error:

This message can only occur during initial positioning prior to a whole body scan. The CY525 stepper motor controller chip never  went to the named status.

Action:

Replace the CY525 IC or the Timing & Control board.

Multiple Data Input Channels Not Implemented Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

No data for attenuation curves Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

 device: No Motion Detected While X-rays ON. Hardware Error:

The QDR is equipped with motion detectors which detect actual motion in the X and Y-axis coordinates. Whenever the X-rays are on, these motion detectors must show constant motion in the X or Yaxis. Otherwise it is assumed that the patient is receiving a concentrated dose of X-rays in one body point; the scan is aborted  and this message is produced.

Action:

Check for loose leadscrew couplers, tighten setscrews A/R. Check for coupler hitting bearing block, move coupler A/R. Check motion encoder, replace if defective. Check Motion Counter board, replace if defective. Check leadscrew lubrication, lubricate if dry. Check StepperMotor Controller board, replace if defective. Check stepper translator, replace if defective. Check Timing & Control board, replace if defective.

 device: Not Detecting Chopper Pickoff  Hardware Error:

!

The filter wheel may not be spinning, or the pickoff may be malfunctioning.

Copyright 1998 by Hologic, Inc. All rights reserved.

11-7

®

QDR  4000 Technical Manual Action:

Check filter pickoff, filter motor, and related cabling. Repair or  replace as required.

Not enough memory Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

out of memory Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Patient File Record __ Too Small or 

Patient File Record __ Too Large Hardware or  Software Error:

These messages indicate problems performing I/O operations (usually to the hard drive, but possibly to diskette or optical).

Action:

Ensure that there is adequate space on the hard drive (Check the "Room for ..." message in the status window. You should always leave room for 1 or 2 scans). There may be a disk problem; appropriate diagnostics should be run. If you are unable to find a hardware problem, the message should be reported to Hologic. Include as much information as possible about what you were doing at the time.

PGLINE: ... Software Error:

Any message that begins this way should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Phase mismatch on odd lines, was __, now __ or 

Phase mismatch on even lines, was __, now __ Hardware Error:

During a scan, the filter wheel phase at the start of every even line must be the same. It must also be the same at the start of every odd  line. This condition was not met, indicating the line frequency may not be 50 or 60 Hz This error usually occurs when running with a motor-generator. This may also indicate a software error involving the RATE.DAT file.

11-8

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages Action:

Check line frequency. If you can find no problems, report this message to Hologic.

 device: Readback Fault on CY525 Hardware Error:

One of the stepper motor controller chips did not respond correctly to an attempt to read it. The message identifies which controller it is.

Action:

To diagnose problems with stepper motors, try going into DOS and  invoking the appropriate motor control program (MOTORX or  MOTORY). These allow direct control over the CY525 chip. Replace the CY525 chip or the Stepper MotorController board if  defective.

RePositioning: Unknown Power Line Frequency Hardware Error:

When repositioning a scan (), the power line frequency appears to have changed.

Action:

See the discussion of the error message "Unable to determine power  line frequency".

ROI Limit Error Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Scan File Record __ Too Small (__) or 

Scan File Record __ Too Large (__) or 

Scan has 0 points or lines Hardware or  Software Error:

These messages indicate problems performing I/O operations (usually to the hard drive, but possibly to diskette or optical).

Action:

Ensure that there is adequate space on the hard drive (Check the "Room for ..." message in the status window. You should always leave room for 1 or 2 scans). There may be a disk problem; appropriate diagnostics should be run. If you are unable to find a hardware problem, the message should be reported to Hologic. Include as much information as possible about what you were doing at the time.

Scan speed in the protocol file is inconsistent with line frequency

!

Copyright 1998 by Hologic, Inc. All rights reserved.

11-9

®

QDR  4000 Technical Manual Software or  Hardware Error:

If you are encountering problems with line frequency (see the description of "Unable to determine Line Frequency" error message), then you can get this message. Otherwise, this message should be reported to Hologic.

SOFTWARE ERROR ... Software Error:

Any message that begins this way should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Start phase = __, must be EVEN or 

Start phase = __, must be in range 0 to 5 Hardware Error:

During a scan, the starting chopper wheel phase for each line must be one of the values: 0, 2, 4. This condition was not met.

Action:

Check the stepper motor controller. Ensure that you have the latest chopper pickoff synchronization fix installed (Part number 061000195-01. This is included in all software releases 5.11.04 and later, and 6.00.01 and later).

Starting phase Out of Range Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

the analyze data file either did not exist or did not contain any valid entries Software Error:

The software was not correctly installed (No ANALYZE.DAT file). This might also be due to a hardware problem with the hard disk  drive.

Action:

Notify Hologic field engineering.

The line frequency measured during startup has changed. Hardware Error:

See the discussion of error message "Unable to determine power line frequency".

Action:

Check the Timing & Control board, replace if defective.

There are no files available to restore (Optical  restore)

11-10

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages User or Software Error:

When restoring files from optical ("Optical" on main menu), you selected  an archive that contains no scans. This situation should not occur in normal operation with current software (versions 5.20 and later).

Action:

Select a different archive. If this message appears with Optical restore with software versions greater than 5.11, report it to Hologic.

There are no records in the Normals Curve database. Software Error:

The reference curve database appears to be totally empty. This condition should never occur in normal operati ons.

Action:

The Hologic software may not have been installed correctly.

 device: Timeout (No 120 Hz Interrupts) Hardware Error:

The Timing & Control board generates an interrupt every 1/120 of a second (60 Hz line) or every 1/100 of a second (50 Hz line). The PC clock generates 18 interrupts a second (r egardless of line frequency). If two clock ticks occur with no Timing & Control board interrupts  between them, then this message is produced.

Action:

Verify that the Chopper Pickoff Synchronization fix (Part no. 061000195-01) has been installed. This fix is included in software releases 5.11.04 and later and 6.00.01 and later). Check filter wheel pickoff for residual noise, add shielded cable A/R. Check Timing & Control board and reseat, modify or replace as required.

 device: Timeout writing to CY525 Hardware Error:

One of the stepper motor controller chips did not respond correctly to an attempt to write to it. The message identifies which controller it is.

Action:

To diagnose problems with stepper motors, try going into DOS and  invoking the appropriate motor control program (MOTORX or  MOTORY). These allow direct control over the CY525 chip. Replace the CY525 chip or the Stepper Motor Controller board if  defective.

Total No. points = __, NOT a multiple of 6 Software Error:

This message indicates a problem with the scan protocol file (that instructs the scan program how to perform a scan). If this happens on one of the officially-released Hologic scan prot ocols, Hologic should   be notified.

Truncated Patient Record ...

!

Copyright 1998 by Hologic, Inc. All rights reserved.

11-11

®

QDR  4000 Technical Manual Hardware or  Software Error:

This messages indicate problems performing I/O operations (usually to the hard drive, but possibly to diskette or optical).

Action:

Ensure that there is adequate space on the hard drive (Check the "Room for ..." message in the status window. You should always leave room for 1 or 2 scans). There may be a disk problem; appropriate diagnostics should be run. If you are unable to find a hardware problem, the message should be reported to Hologic. Include as much information as possible about what you were doing at the time.

 device: Unable To Allocate Resources Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Unable to Allocate Space for Environment or 

Unable to Restore Environment or 

Unable to Calculate Line-By-Line d0's Software Error:

These messages should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Unable to determine power line frequency Hardware Error:

The line frequency is determined by counting the number of Timing & Control board interrupts that occur during PC clock tick intervals. The Timing & Control board interrupts occur 100 (50 Hz) or 120 (60 Hz) times per second. The PC clock ticks approximately 18 times  per second. Several clock ticks are observed to ensure consistency. If reasonable numbers of interrupts are not observed, this message appears.

Action:

Check the Timing & Control board.

Unable to format diskette

11-12

User or Hardware Error:

This usually means that you attempted to format a diskette t hat was defective.

Action:

Try a different diskette. If this message occurs repeatedly, and with more than one diskette, it may mean a hardware problem with a diskette drive or the controller board. (In some computers, the controller circuitry is on the motherboard; if this circuitry is defective, the entire computer must be replaced.)

!

Copyright 1998 by Hologic, Inc. All rights reserved.

Section 11 – Error Messages Unable to normalize line sums Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Unable to find file or 

Unable to Find Line by Line d0's or 

Unable to Find Previous Analysis Results or 

Unable to Open Tissue Calibration File ________ or 

Unable to open temporary file ________ or 

Unable to open temporary Q-File or 

Unable to Position File to HALO Record or 

Unable to Position Data File or 

Unable to Position File: ________ or 

Unable to Position Patient File or 

Unable to Position Patient File Past Record __ or 

Unable to Position Patient File To End or 

Unable to Position Scan File Past Record __ (__) or 

Unable to Position Q-Data File or 

Unable to Read Data File or 

Unable to Read File: ________ or 

Unable to Read Line by Line d0's or 

Unable to Read Previous Analysis Results or 

!

Copyright 1998 by Hologic, Inc. All rights reserved.

11-13

®

QDR  4000 Technical Manual

Unable to Rewind Q-File or 

Unable to Rewind File: ________ or 

Unable to Read BMD Image Frame or 

Unable to Read HALO Frame Header or 

Unable to Read Q-Data File or 

Unable to Write to Q-Image File Hardware or  Software Error:

These messages indicate problems performing I/O operations (usually to the hard drive, but possibly to the floppy or optical drive).

Action:

Ensure that there is adequate space on the hard drive (Check the "Room for ..." message in the status window. You should always leave room for 1 or 2 scans). There may be a disk problem; appropriate diagnostics should be run. If you are unable to find a hardware problem, the message should be reported to Hologic. Include as much information as possible about what you were doing at the time.

Unable to open a window Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Unable to open X-ray device driver Software Error:

This message should be reported to Hologic. Please include as much information as possible about what you were doing at the time.

Unable to restore scan. If the System Disk is full Delete Archived scans and try again. User or Hardware error:

The system was unable to restore one or more scans.

Action:

This usually means that the hard drive is full. Check the "Room for  "message in the status window. If the disk is NOT full, then this indicates a hard drive problem.

Unable to set PMT Voltage or 

Unknown ROI type in DrawROI

11-14

!

Copyright 1998 by Hologic, Inc. All rights reserved.