Epson LCD Projector ELP-3000,3300 Service

ELP-3000/3300

INTRODUCTION This service manual describes hardware information necessary for field service and troubleshooting of the ELP-3000/ELP-3300 Projectors. Manual updates will be supplied in service bulletins.

HOW TO USE THE SERVICE MANUAL This manual covers topics required for field maintenance, so you can use it for diagnosis of failures or repair. Before beginning maintenance work, be sure to read and observe all safety precautions and rules. The contents of this manual are as follows: Precautions: Personal Safety, Protecting Protecting the Unit from Damage, Requirements Requirements for Service Chapte Cha pterr 1: Specif Specifica icatio tions ns (Par (Partt Names Names,, Syste System m Funct Function ions, s, etc.) etc.) Chapte Cha pterr 2: Theory Theory of Operat Operation ion (Hardw (Hardware are,, Inte Interna rnall Con Conne necti ction ons, s, Unit Unit Functions) Chap Ch apte terr 3: Disa Disass ssem embl bly y and and Asse Assemb mbly ly Chapte Cha pterr 4: 4: Troubl Troublesh eshoot ooting ing (Trou (Trouble blesho shooti oting ng Flowch Flowchart arts) s) Chap Ch apte terr 5: Im Imag age e Adj Adjus ustm tmen entt Prog Progra ram m

INTRODUCTION This service manual describes hardware information necessary for field service and troubleshooting of the ELP-3000/ELP-3300 Projectors. Manual updates will be supplied in service bulletins.

HOW TO USE THE SERVICE MANUAL This manual covers topics required for field maintenance, so you can use it for diagnosis of failures or repair. Before beginning maintenance work, be sure to read and observe all safety precautions and rules. The contents of this manual are as follows: Precautions: Personal Safety, Protecting Protecting the Unit from Damage, Requirements Requirements for Service Chapte Cha pterr 1: Specif Specifica icatio tions ns (Par (Partt Names Names,, Syste System m Funct Function ions, s, etc.) etc.) Chapte Cha pterr 2: Theory Theory of Operat Operation ion (Hardw (Hardware are,, Inte Interna rnall Con Conne necti ction ons, s, Unit Unit Functions) Chap Ch apte terr 3: Disa Disass ssem embl bly y and and Asse Assemb mbly ly Chapte Cha pterr 4: 4: Troubl Troublesh eshoot ooting ing (Trou (Trouble blesho shooti oting ng Flowch Flowchart arts) s) Chap Ch apte terr 5: Im Imag age e Adj Adjus ustm tmen entt Prog Progra ram m

VCCI COMPLIANCE STATEMENT This

equipment

has

been

tested

and

found

to

comply

with

the

limits

for

Type

1

information equipment, which uses radio-frequency energy and fully complies with the specifications limiting computer information equipment in radio interference regulations (VCCI rules). If not installed and used properly according to the manufacturer’s instructions, this device may cause interference interference to radio and television reception. However, there is no guarantee that interference interference will not occur in a particular installation. If this equipment does cause interference to radio and television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: •

Reorient or relocate the receiving antenna

•

Increase the separation between the equipment and receiver

•

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected

•

Consult the dealer or an experienced radio/TV technician for help.

The user may find the following booklet, prepared by the Federal Communications Commission, helpful: How to Identify and Resolve Radio-TV Interference Programs. This booklet is available from the U.S. Government Printing Office, Washington, D.C., 20402, Stock No. 044-00-00345-4. You can determine whether your computer is causing interference by turning it off. If the interference stops, it was probably caused by the computer or its peripheral devices. To further isolate the problem, disconnect either the peripheral device or its I/O cable. These devices usually require a shielded cable. For EPSON peripheral devices, you can obtain the proper shielded cable from your dealer. For non-EPSON devices, contact the manufacturer or dealer for assistance.

Warning Only peripherals (computer input/output devices, terminals, printers, etc.) certified to comply with the Class B limits may be attached to this projector. Operation with non-certified peripherals is likely to result in interference to radio and TV reception. The connection of a non-shielded equipment interface interface cable to this equipment will invalidate the FCC Certification of this device and may cause interference levels that exceed the limits established by the FCC for this equipment. Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the projector.

REVISIONS

Date April 1997

Level Third Release

TRADEMARK INFORMATION EPSON is a registered trademark of Seiko Epson Corporation and EPSON Connection is a service mark of Epson America, Inc. NEC and PC-98 SERIES are registered trademarks of NEC CORPORATION. IBM and DOS/V are registered trademarks of International Business Machines Corporation. Macintosh and Power Book are the registered trademarks of Apple Computer Inc. Windows is a registered trademark of Microsoft Corporation.

Record of Revisions

Memo

History

Issued Date

Changes

REV•|A

1995.May.5

Original Issued (ELP-3000)

REV•|B

1996.April.15

Addition of ELP-3300

REV C

1997 April 15

Edit for style and readability

PRECAUTIONS OPERATOR SAFETY 1. PROTECTION FROM ELECTRIC SHOCK * Before Before performi performing ng any any repair repair work work on the produ product, ct, be sure to to turn off the pow power er switch switch and remove the electric power cable from the electrical outlet. * Whenever Whenever it is is necessa necessary ry to turn turn powe powerr on after after openin opening g the case case or cover, cover, be be sure to to remove anything you are wearing that is metal, such as a watch, cuff links, ring, or tie pin, that may touch metallic parts of the product, creating a danger of electrical shock. 2. PROTECTION FROM INJURY * Be sure sure not not to touch touch the the lamp and its its surroun surrounding dings s after after power power is turned turned off; it may may be hot. * Use glove gloves s to protec protectt your your hands hands from sharp sharp edges edges during during assembly assembly and disass disassembl embly. y. * To protec protectt your your eyes eyes from being being damaged, damaged, do do not look into into the the light light source source or lens lens while the light is on. 3. ACCIDENT PREVENTION * To preven preventt the d devic evice e or its its compone components nts from from falling, falling, perform perform any ope operatio ration n only after the device is placed on a flat and stable surface. * To preven preventt this produ product ct from being being used used before before itit is totally totally reassemb reassembled, led, be be sure not not to leave the product out during any repair work, and do not place it in a location where it can be taken for use by mistake. * Be sure sure to to use the atta attached ched powe powerr cable cable to supply supply power power to to the product. product.

PRODUCT SAFETY 1. ELECTROSTATIC DISCHARGE * Whenever Whenever perform performing ing repair repair work on the the produc product, t, be sure sure to wea wearr a wrist wrist band band and and use an electrostatic mat for grounding. When you replace any electric components (boards and light bulb), it is recommended that you touch the electrostatic plastic bag containing the component to a metallic part of the product before taking the component out of the plastic bag. 2. RESTRICTIONS FOR PARTS REPLACEMENT * Use only auth authorize orized d pa parts rts or EPSON EPSON-sup -supplie plied d pa parts rts for replac replacemen ementt of mechani mechanical cal components, components, including the light source lamp, air filter, and so on. * Use only only the the power power cable cable and the inter interface face cables cables suppli supplied ed with with the the product product.. 3. OTHER PRECAUTIONS * Visually Visually check check for damage damage or dirt dirt on the the power power connec connector tor and and cable. cable. If dirty, dirty, clean clean it, it, and if bent or damaged, replace the cable. * When conne connectin cting g internal internal conne connector ctor cable cables s or interfac interface e cables, cables, be be sure to to plug them them into the connector fully, until attached to the connector edge.

*

*

Before removing the FPC cable for the light bulb, be sure to remove the connector lock in advance. Unlock the connector lock by pulling up both ends of the connector lock simultaneously with tweezers. Whenever removing parts or repairing the product, work in a clean room, free from dust and dirt, to keep the optical elements away from dirt.

REQUIREMENTS FOR THE MAINTENANCE PERSONS Authorized servicers should have the following knowledge and skill for maintenance of the ELP-3000 or ELP-3300: * Training in an EPSON-authorized maintenance training program and authorization as a service engineer. * Sufficient understanding of the operations and descriptions in this service manual. * Basic knowledge of electricity (safety operations, circuit diagrams, static electricity, etc.)

OTHERS *

For questions on projector maintenance, including service parts or document contents, contact the address below. Any technical information about changes will be released as necessary in service bulletins.

EPSON AMERICA, INC. 20770 Madrona Avenue Torrance, CA 90503 (310) 782-0770

Contents Chapter 1 Product Features 1.1 Product Features........................................................................................ 1-1 1.2 Parts of the Projector ................................................................................. 1-3 1.2.1 Exterior View of the Main Frame................................................... 1-3 1.2.2 Interior View of the Main Frame.................................................... 1-4 1.2.3 Exterior Views of the Remote Control ........................................... 1-5 1.3 Connection................................................................................................. 1-6 1.4 Main Components ...................................................................................... 1-7 1.5 Specifications ............................................................................................. 1-11

Chapter 2 Theory of Operation 2.1 Hardware.................................................................................................... 2-1 2.1.1. Electrical System Connections ..................................................... 2-2 2.1.2. Optical System Connections......................................................... 2-3 2.2 Power Supply Unit...................................................................................... 2-5 2.3 Driver Board ............................................................................................... 2-7 2.4 Video Board ............................................................................................... 2-11 2.5 Interface Board........................................................................................... 2-13 2.6 Receptor Board .......................................................................................... 2-14 2.7 Speaker Unit .............................................................................................. 2-15 2.8 Light Guide Block ....................................................................................... 2-16 2.9 R/G/B Light Valves to Prism Unit................................................................ 2-18 2.9.1. R/G/B Light Valves ....................................................................... 2-18 2.9.2. Prism Unit ..................................................................................... 2-19 2.10 Projector Lens........................................................................................... 2-20 2.11 Lamp Housing........................................................................................... 2-21

Chapter 3 Disassembly and Assembly 3.1 Disassembly and Assembly Procedures..................................................... 3-1 3.2 Projector Main Unit Disassembly and Assembly......................................... 3-3 3.2.1. Removing the Lamp Inner Housing .............................................. 3-4 3.2.2. Removing the Upper Case Unit and Handle ................................. 3-6 3.2.3. Removing the Driver Board Block ................................................. 3-8 3.2.4. Removing the Speaker Units ........................................................ 3-10 3.2.5. Removing the Front Case Unit...................................................... 3-11 3.2.6. Removing the Receptor Board Assembly ..................................... 3-12 3.2.7. Removing the Thermistor and Heat Shield Plates A and B ........... 3-13 3.2.8. Removing the Exhaust Fan Unit 3-15

3.2.12. Removing the Video Board Assembly ...........................................3-20 3.2.13. Removing the Interface Board Assembly ......................................3-21 3.2.14. Removing the Power Supply Unit..................................................3-22 3.2.15. Removing the Adjustable Foot Unit...............................................3-23 3.2.16. Removing the Board Retaining Plate And Head Cover .................3-25 3.3 Replacing the Batteries in the Remote Control Unit....................................3-26

Chapter 4 Troubleshooting 4.1 Before Starting Troubleshooting Procedures..............................................4-1 4.1.1. Tools and Accessories Required For Troubleshooting..................4-1 4.2 First Action .................................................................................................4-2

Chapter 5 Image Adjustment Program 5.1 Image Adjustment Program........................................................................5-1 5.1.1. When to Use the Image Adjustment Program ..............................5-1 5.1.2. Running the ELP-3000 Image Adjustment Program .....................5-2 5.1.3 Running the ELP-3300 Image Adjustment Program .....................5-11

Chapter 1 Product Features

EPSON ELP-3000/3300 Service Manual

1.1 PRODUCT FEATURES The ELP-3000 and the ELP-3300 Projectors are easy-to-use, portable presentation devices with a VGA resolution that lets you project enhanced color images from personal computers and video equipment, such as VCRs, video camcorders, and video disc players.

Figure 1-1 ◊

Portable, light-weight, compact. The one-piece optical unit, circuit board design, and simple structure minimize the projector body almost to page-size length and width, and a weight of 17 lbs (7.7 kg). An optional carrying case is useful for transporting the unit.

◊

Bright, clear images. The high-performance zoom lens and new high-brightness lamp let the projector achieve wide-screen image projection (from 21 to 300 inches) at a projection distance from 4 to 40 feet (1.2 to 12.3 m). The optional high-brightness screen ensures brightness regardless of ambient lighting.

◊

High-resolution, full color (16770 thousand colors) Three R, G, and B TFT liquid crystal panels containing 307,200 pixels support a VGA resolution of 640 x 480 dots (approximately 920,000 pixels). The grid between pixels in the liquid crystal panel is thinner than in conventional projectors to provide sharp contrast.

◊

Remote control The easy-to-use remote control handles numerous functions for presentations. You can control most operations with one hand. By attaching the computer and projector with the supplied serial cable, you can use the remote control as a computer mouse.

◊

Connectivity with various computers An advanced capacity for data signal determination enables the projector to 1-1


connect with various computers, such as IBM PC compatibles (including DOS compatibles), and Macintosh computers. The projector operates under Windows 3.1, Windows 95, and Macintosh System 6.X and 7.X. Simple maintenance Maintenance is easy, and the number of adjustments has been minimized.

1-2


1.2 PARTS OF THE PROJECTOR 1.2.1 EXTERIOR VIEW OF THE MAIN FRAME Remote Control Receiver

Control Panel

Zoom Ring Focus Ring

Status Lights

I/O Connectors Foot Adjustment Button Foot

Figure 1-2

Foot Adjustment Buttons

Figure 1-3

Lamp Cover

Air Filter Cover

Figure 1-4

1-3


1.2.2 INTERIOR VIEW OF THE MAIN FRAME Driver Board

Power Supply Unit

Speaker Units

Figure 1-5 Video Board

Interface Board

Figure 1-6 Receptor Board (Front)

Receptor Board (Rear)

Figure 1-7

1-4


1.2.3 EXTERIOR VIEWS OF THE REMOTE CONTROL

Figure 1-8

Figure 1-9

1-5


1.3 CONNECTION 1.3.1 MS-DOS and Compatibles Desktop VGA Port VGA Connector

Monitor Cable LCD Connector Monitor Connector

Figure 1-10 Notebook

LCD Connector

VGA Connector Monitor Connector

Figure 1-11 PowerBook

VGA Connector Third-party Macintosh Adapter Macintosh Macintosh Adapter Macintosh Adapter Adapter supplied) (supplied) supplied

LCD Connector Monitor Connector

Figure 1-12

1-6


1.3.2 Macintosh Desktop

Monitor Port Macintosh VGA Adapter VGA Connector Macintosh Monitor Cable Macintosh Monitor Adapter

LCD Connector Monitor Connector

Figure 1-13

1.4 MAIN COMPONENTS Driver Board

Figure 1-14 Video Board

Figure 1-15 1-7


Interface Board

Figure 1-16 Power Supply Unit

Figure 1-17 Light Guide Block

Figure 1-18

1-8


Light Valve Block

Figure 1-19 Projector Lens Unit

Figure 1-20

1-9


Lamp Outer Housing

Figure 1-21 Lamp Assembly (viewed from bottom of projector)

Figure 1-22

1-10


1.5 SPECIFICATIONS Table 1-1 OPTICAL FEATURES

Display method

Transparency type TN color liquid crystal display (R/G/B)

Projection image size

21 inches minimum to 300 inches maximum

Projection distance

3.9 to 40.3 feet (1.2 to 12.3 m)

Resolution

640 x 480 dots, 307,200 pixels x 3

Projection lens

Zoom lens F2.5 - 2.9 (55-77 mm)

Focus adjustment

Manual

Zoom adjustment

Manual (1:1.4)

Light Source

150 W - 65 V, Metal halide lamp, (type No.MSCR150E3H)

Average illumination

Typical: 250 ANSI lumens (ELP-3000); 350 ANSI lumens (ELP-3300)

INTERFACE CONNECTIONS

Input

Video audio signal (stereo) Host computer audio output (stereo) Built-in speaker(1W-8 Ω) x 2 (stereo)

Output

External speaker Output control function Input source 1

Host computer I/O interface (analog RGB/VGA monitor board/video board) Audio input interface (stereo)

Input source 2

Video image input interface S image input interface Video audio input interface (stereo)

Audio output

External speaker output

RS-232

DIN-8-pin, Bidirectional communication between host computer and projector

Optional power outlet

12 VDC - 0.35 A

REMOTE CONTROL

Wireless remote control

Within 33 feet (10 m) from and within an angle of 30 degrees of the projector’s receptor. Wired control is available by using the exclusive cable (maximum length of 20 m)

Operation key

One button available on the top of the projector control panel.

POWER SUPPLY

Input voltage

100-120 VAC ± 10% / 220-240 VAC ± 10% (50/60 Hz)

Power consumption

Approximately 220 W

DC output

12 V 0.35 A

Dimensions

Weight

Without foot adjuster and lens

11.22 inches wide (285 mm) × 5.5 inches high (140 mm) × 13.5 inches deep (344 mm)

With foot adjuster and lens

11.22 inches wide (285 mm) × 5.87 inches wide (149 mm) × 16.26 inches deep (413 mm) Approx. 171 lbs (7.7 kg)

1-11


ENVIRONMENT

Operational/storage temperature

41 ° F ∼ + 104° F / 14 ° F ∼ + 140° F ( non condensing) (5° C ∼ + 40° C / −10° C ∼ + 60° C)

Operational/storage humidity

20% ∼ 80% / 10% ∼ 80% (non condensing)

1-12

Chapter 2 Theory of Operation


2.1 HARDWARE The optical and electrical systems are the major areas of projector hardware. The lower level boxes (below the broken line in the figure below) list elements in the optical system, while the boxes above the broken line list elements in the electrical system. POWER SUPPLY UNIT: Generates DC voltage (+5 V, +12 V) for the circuits; also generates DC voltage (+65 V) for the light source.

DRIVER BOARD: Generates the R/G/B light valve memory and the drive signals. Sets initial operations for interface circuit and controls the control sensors, fans, speakers, and remote control.

VIDEO BOARD:

INTERFACE

Generates the

UNIT:

R/G/B video

I/O interface

signal. Detects

connector

the brightness

board (PC /

and controls the

video / audio

temperature

/RS-232C

(overheating

/remote /DC

protection).

INTAKE FAN *1

R/G/B LIGHT

R/G/B

LENS UNIT

VALVE

PRISM

Focus/zoom

composite

EXHAUST FAN *2

LAMP HOUSING 150 W-65 V light source

Note: *1: The intake fan cools the R/G/B light valves of the LCD panel. Note: *2: The exhaust fan gives off heated air from around the light source.

LIGHT VALVE BLOCK 3: Divides the light into parts (R/G/B) for the lens, filter, and mirror

Figure 2- 1 Description of the Projection Process 1. 2. 3. 4.

A video signal is provided in digital or analog form from a computer through the interface board. (Analog signals are converted into digital signals by the driver board.) The digital video signal is then stored in video memory on the driver board. Then the video board generates signals to drive the R/G/B light valves. The R/G/B light valves are individual panels, independent of each other. They work to shut off or transmit light from the light valve block. Lights transmitted through the light valves are combined by a prism and projected through the lens unit.

2-1


2.1.1 ELECTRICAL SYSTEM CONNECTIONS Electrical units are physically connected to the driver board, as shown below. E X HA U S T F A N

RECEPTER

THERMISTER

COOLING FAN

BOARD (FRONT)

POWER SUPPLY

CN815

CN805 CN802

CN807

(624)

CN810

912

913

SPEAKER UNIT (RIGHT)

914

CN806 CN81 3

DRIVER BOARD

L I G HT B U L B

890

(B)

CN812

875

L I G HT B U L B

CN814

(G)

(600) RECEPTER BOARD

L I G HT B U L B (R)

CN80 8

(REAR)

CN81 4

(911)

860 CN800

CN801

620

621

CN803

623

LIGHT CN202

CN203

V I DE O B O AR D CN200

CN201

CN100

CN101

INTERFACE BOARD

Figure 2-2

2-2

SPEAKER UNIT (LEFT)

Note: The parts enclosed in parentheses apply only to the ELP-3300.


Unit Name Exhaust Fan Receptor Board Intake Fan Power Supply Unit R/G/B Light Valves Speaker Unit Light Source Lamp Video Board Interface Unit

Table 2-1 Functions And Remarks For eliminating heat from light source lamp and power supply unit Remote control signal detection Cools the light bulb Generates 65 V from AC IN for light source lamp Generates +5 V/ +12 V/ +18 V Generate image data (LCD panel) Audio output For image projection (metal halide discharge lamp) A/D converter for analog video signal Audio signal amplitude, others External device connection

2.1.2 OPTICAL SYSTEM CONNECTIONS The optical systems consists of 4 blocks (lamp housing, light guide unit, prism, and projector lens) as shown below.

Light Guide Unit

Lamp Housing Projector Lens

Figure 2-3

2-3


Figure 2-4

Unit Name Lamp Housing Light Guide Unit Guide Block Projector Lens

Table 2-2 Function And Remarks Includes one metal halide lamp as a light source, and a filter for removing ultraviolet radiation Disperses light from the light source uniformly using the A/B lens array. Disperses the light in three parts (R/G/B). Zoom (*1.4) and focus adjustments

2-4


2.2 POWER SUPPLY UNIT The power supply unit includes a DC regulator, exhaust fan, and interlock switch for the lamp cover. The power supply unit generates the voltages for the control circuit (+5 V, +12 V, +18 V) and for the light source lamp (+65 V) from the AC input. Although a functional diagram is shown below, never disassemble the power supply unit during field maintenance service. DC regulator

Safety switch Interlock switch Lamp power connector

Exhaust fan

Figure 2-5

Functional Block Diagram INTERLOCK SW

POWER SW

N/C

N/C

FUSE

•`

AC IN

FILTER/

REGULATOR

RECTIFIER

250 V-6.3 A

SAFETY

DRIVER

SWITCH

BOARD

EXHAUST FAN

DC OUT 12 V 0.35 A

INTERFACE BOARD

LAMP

VIDEO BOARD

DRIVER BOARD DRIVER BOARD

INTERFACE BOARD

VIDEO BOARD

DRIVER BOARD

+6.5 V +5 V +18 V +12 V

Figure 2-6 * An interlock switch is included for safety purposes. The interlock switch shuts off the supply of AC power if the lamp cover at the bottom of the main chassis is opened. * The fuse (250 V -6.3 A), which is designed to protect the internal circuits, can be replaced by the customer. An extra fuse is supplied with the projector. * The safety switch input signal is designed for protection from overheating. It stops power output to the light source lamp if the projector detects overheating in the lamp area.

2-5


Functional Outline ◊

The interlock switch at the bottom of the main chassis shuts off AC power when the lamp cover is opened. It is normally in the ON position.

◊

The cable connected to CN815 (ELP-3000) or CN624(ELP-3300) on the driver board is a signal line to indicate the conditions of two fans (the exhaust fan and intake fan), which are connected to connectors CN805 and CN806 on the driver board. These signals shut off power to the light source lamp to prevent overheating if either fan stops rotating.

◊

The filter/rectification circuit reduces noise on the AC line and generates DC voltage for the regulator.

◊

The regulator generates various DC voltage levels shown in the table below for the switching regulator. The regulator detects the voltage output level on the +5 V line and feeds the information back to the switching circuit to maintain a stable output level, regardless of load variations. Every output voltage level is not subject to adjustment. Table 2-3 Output Voltage Specification

◊

+18 V

+18 V +/- 5% (17.1 to 18.9 V)

+12 V

+12 V +/- 5% (11.4 to 12.6 V)

+5 V

+5 V +/- 5% ( 4.75 to 5.25 V)

The intake fan removes heat generated in the power supply unit. Heat expelled by the intake fan is blown out by the exhaust fan, connected to CN806 on the driver board.

(3) Pin Assignments Pin 12

Pin 1

CN815 (CN624) *1

Table 2-4 Pin No. I/O Signal 1

IN

Lamp on/off

2-9

-

Ground

7

OUT +18V

8

OUT +12 V(b)

9

OUT +12 V(a)

10-12

OUT +5 V

Note: Values enclosed in parentheses apply to the ELP-3300.

Figure 2-7

2-6


2.3 DRIVER BOARD The driver board consists of the CPU, P-ROM, video memory, digital video processor, and circuits to control the interface, control panel, fan, speaker, receptor board interface, etc. The driver board controls everything except video signal generation. The driver board can either be replaced as a unit, or the following components are available for individual replacement: ◊

IC708 (ELP-3000), or IC605 (ELP-3300): Includes firmware to set initial values and control projector functions.

◊

Fuses: For protection of the electric circuits. Details are shown below. Table 2-5

Table 2-6

ELP-3000 Projector

ELP-3300 Projector

FUSE SPECIFICATION

PURPOSE

FUSE SPECIFICATION

PURPOSE

FL1

1.25 A (4511.25

+5 V protection of CPU

FL720 1.25a (4511.25

+18 V protection

chip)

circuit on the driver board

chip)

of the LCD driver circuit on the video board

FL2

4.0 A (451004 chip) +5 V additional protection

F400 0.52A-72V (CCP2EB chip)

(CCP2EB chip)

+5 V protection of

of the driver circuit; also,

the driver board,

protection of the video

video board and

board and interface board.

interface board.

+18 V protection of LCD driver circuit on the video board

F401 0.52A-72V

FL600 4.0a (451004 chip)

+5 V (-2 V) protection of -2 V circuit which is generated from +5 V for the LCD driver.

2-7

EPSON ELP-3000/3300 Service Manual F401

F400 (Rear)

FL1

Figure 2-8

2-8

FL2


(1) Circuit block diagram of the driver board ADDRESS /DATA BUS CPU READ/

(IC706)

WRITE/

BUS

FLASH ROM

BUFFER

(IC708)

RESET OSC

INT

RAM

(20M) REMOTE

CN807

(IC709) ADDRESS

CONTROL ADDRESS

CN808

BUS DATA BUS ADDRESS VIDEO INTERFACE CONTROL:

BUS OSC

CONVERTS VIDEO SIGNAL(A/D)

26.8M

PRODUCES DISPLAY TIMING

CN800 CONNECTS CN801

TO THE VIDEO BOARD

RIGHT

LEFT

SPEAKER

SPEAKER

RAM CONTROL

SHIFT CLOCK LEVEL

SW8540

(READ WRITE)

SHIFTER

(O~F)

OUTPUT PANEL SW SIGNAL D/A SHIFT CLOCK R

G

OUT OUT OUT

CONTROL PANEL

B

VIDEO RAM AMP/XLAMP

AMP/XLAMP

AMP/XLAMP

DIVIDER

DIVIDER

DIVIDER

THERMISTOR CN810

+12 V EXHAUST FAN

THERMO

FAN

CONTROL

BIAS

INTAKE FAN

LIGHT VALVE

LIGHT VALVE

LIGHT VALVE

DRIVER:

DRIVER:

DRIVER:

PRODUCES DRIVE

PRODUCES DRIVE

PRODUCES DRIVE

BIAS, ANALOG

BIAS, ANALOG

BIAS, ANALOG

SIGNAL, AND DRIVE

SIGNAL, AND

SIGNAL, AND

CLOCK

DRIVE CLOCK

DRIVE CLOCK

X START CONTROLS LC (BRIGHTNESS) CONTROL CN811

CN812

CN813

LIGHT VALVE

LIGHT VALVE

LIGHT VALVE

B DRIVER

G DRIVER

R DRIVER

Figure 2-9

2-9



When power is turned on, the driver board activates the reset signal, which is controlled by IC707, and the CPU reads the program from flash ROM and writes it into RAM (IC709). Then the CPU sets the functions based on the program and projects the initial image.

◊

The digital video interface (IC800) from the video board generates timing to project the image data received or executes data bit conversion (A/D) to write the received analog image data to VRAM.

◊

The memory controller (IC850) performs read/write operations, saving data to SRAM. Video signals (analog/digital) provided through the interface board are immediately stored in video RAM.

◊

Data stored in SRAM is converted to analog signals by the D/A converter. The output is divided into 8 bits for each R/G/B light valve by the amplitude and lamp circuits.

◊

The circuit for the light valve driver (R/G/B) generates six different levels of voltage to control the timing of the X and Y signals.

*The ELP-3300 projector has a timer circuit that controls the operating time of the light source (lamp) valve. Its operation is described below. Table 2-7 LIGHT SOURCE STATE LAMP MONITOR STATE When the operating time of the light The lamp monitor continues to flash red source (lamp) valve exceeds 700 hours... and green for 5 minutes after it is turned on. (The lamp stays on.) When the operating time of the light The lamp monitor flashes green and source (lamp) valve exceeds 1000 orange. (The lamp will not illuminate.) hours... When the light source (lamp) valve is The lamp monitor lights red. defective… If you observe the conditions above, replace the light source (lamp) valve and reset the timer as follows: With the power off, press the MENU and -SYNC buttons. Continue to hold down the MENU and -SYNC buttons while you turn on the projector. When the three lamp monitors (Operation, Lamp, and Temperature) start flashing orange simultaneously, release the MENU and -SYNC buttons and turn the projector off; then turn the projector on again. Note: If you press the +SYNC button instead of the -SYNC button, the timer will not reset.

2-10


2.4 VIDEO BOARD The video board has a circuit for converting analog signals from the driver board into digital signals. In addition to controlling video brightness and detecting temperature, it has a circuit to control amplitude of the audio output.

Figure 2-10 The board can be replaced as a whole unit for maintenance service. The fuses listed in the table below can be replaced individually. Table 2-8 Fuse F200 * FU200 (4A)** F201/202*

Specification Usage 4A-125 V +5 V (Digital chroma, A/D converter) 0.052 A-72 V +5 V (Digital chroma, A/D converter), +12 V (Video amplifier) 0.4 A +5 V (D/A converter, A/D converter) 0.8 A-72 V +12 V (Audio amplifier,+8.5 V regulator)

F203* F204* FU201 (2A)** * ELP-3000 only ** ELP3300 only Functional Outline ◊

Digital timing signals are synchronized by a three state bus buffer before being output to the driver board.

◊

The analog R/G/B signal, input from the interface board, is amplified by the amplitude circuit, then converted by the analog to digital converter into individual 7-bit signals before being output to the driver board.

◊

Analog R/G/B output signals are transmitted differently, depending on whether the input is analog or digital. If the input is analog, video amplitude signals are output through the video buffer. If the input is digital, signals are converted to analog by the chroma circuit and the digital to analog converter before being output through the video buffer.

2-11


Circuit Block Diagram of Video Board CONNECTS TO THE INTERFACE BOARD CN200

RXD/TXD

LEVEL SHIFTER

RS-232C P DIGITAL R/G/B C HS VS

RSLEVEL •¨+5 V/GND CN202

3 STATE BUS BUFFER

DATA SELECTOR

IN /O ANALOG R/G/B U INPUT T

VIDEO AMP

ANALOG R/G/B

VIDEO OUTPUT

OUTPUT

BUFFER

DIGITAL

P

MUTE

REFERENCE ADT

AUDIO IN

L/R/ OUT

AUDIO

AUDIO

CONTROL

AUDIO IN

AMP

L/R

CN203 CONNECTS TO THE

AUDIO OUT S

BOARD

R/G/B

C L/R V

R0~7 G0~7 B0~7

CONVERTER

CONNECTS TO THE INTERFACE BOARD CN201

TO THE DRIVER

ANALOG/

R/C DATA

CONNECTS

R0~7 G0~7 CHROMA B0~7

Y/C/SW INPUT

DIGITAL

ANALOG/ DIGITAL CONVERTER

DIGITAL/

SUB RGB

ANALOG CONVERTER 8 CHANNEL

Figure 2-11

2-12

DRIVER BOARD


2.5 INTERFACE BOARD UNIT The interface board unit consists of the input interface connector and the noise filter circuit. This unit does not perform any controlling function. F300

Figure 2-12 The board can be replaced as a whole unit for maintenance service. In addition, the following fuse can be replaced individually: F300 052 A-72 V (CCP2E13 CHIP) ---For DC-OUT 12 V

Circuit Block Diagram of the Interface Board PC

CN100

IN/OUT SOURCE 1

AUDIO L CN101

AUDIO R

SVIDEO

SOURCE

VIDEO

2 AUDIO L AUDIO R

AUDIO OUT +4 V

+12 V

REGULATOR

REGULATOR

RS-232C +4 V REMOTE

+12 0.5 A

DC OUT

Figure 2-13

2-13



The I/O circuit of each interface contains noise filters and resistors.

◊

When connected, the remote control is supplied power by the interface board. (When it is not connected, the remote control is battery-powered.) The +4 V regulator on the interface board converts +5 V to +4 V.

◊

To supply voltage (12 V - 0.35 A) for the DC output for the operation of video devices, the +12 V regulator converts +5 V to +12 V.

2.6 RECEPTOR BOARD The projector includes two receptor boards, one in the front and one in the back, both of which are attached to the power supply unit. A detector mounted on each of the receptor boards senses infrared signals. Control of any signals received by one of the receptor boards is transferred to the CPU as interrupt signals. Receptor Board (Front)

Receptor Board (Rear)

Figure 2-14

2-14


2.7 SPEAKER UNIT Two internal speakers provide full stereo sound. Audio signals from the amplitude circuit on the video board are output to these speakers. In addition, two externally connected speakers provide audio signals. You can use the fade function to adjust the balance between internal and external speakers.

Figure 2-15

2-15


2.8 LIGHT GUIDE BLOCK This section is provided for informational purposes only. The light guide block makes the light intensity from the light source lamp uniform before dividing it into 3 light outputs (R/G/B). Lenses and mirrors built into the block disperse the light. Figure 2-16 is a photograph of the light guide block, and Figure 2-17 is an internal block diagram.

Figure 2-16

LIGHT GUIDE UNIT

PROJECTOR LENS

Figure 2-17 2-16


A and B Multi-lens Arrays Dispersion of light from the light source lamp through the A and B multi-lens arrays make brightness roughly uniform. A UV filter coats the surface of the multilens array to eliminate ultraviolet rays. CDM The CDM is a light filter that looks red in ordinary light. The CDM (A) filter transmits only red light, and reflects blue and green light from the light source. GDM The GDM is a light filter that looks blue in ordinary light. The GDM filter transmits only blue light from the light source. Blue and green light reflected by the CDM provide light input to the GDM; green light is reflected by the GDM to the G condenser lens. D and E Condenser Lenses The D and E condenser lenses collect the light dispersed by the GDM to prevent reduction and provide light to the mirror at the next stage. R, G, and B Condenser Lenses Collect the light divided into R,G, and B. R, G, and B Polarization Plates Control the color of lights dispersed into red/blue/green by the CDM and GDM. Films in the colors shown below are placed on each sheet of the polarization plate. Table 2-9 Name Color Of Film Polarization R Green Polarization G Blue Polarization B Red

2-17


2.9 R/G/B LIGHT VALVES TO PRISM UNIT 2.9.1 R/G/B LIGHT VALVES This section is provided for informational purposes only. The R/G/B light valves are each high-density, liquid crystal panels of 307,200 pixels (liquid crystal shutters) of 1.1” (W) x 0.8” (H) (26.9 x 20.2 mm). The condition of the twist level in the liquid crystal shutter can be controlled in units of 8 degrees from a fully closed condition (no light transmission) to a fully open condition (no light blocked). Combining the three light valves (R/G/B) enables projection in full color (approximately 16,700,000 colors). Table 2-10

Name Light Valve G Light Valve B Light Valve R

Remarks Light valve G does not have a position adjust plate. Light valve B has a blue label on the FPC cable. Light valve R has a red label on the FPC cable.

Light Valve G

Light Valve B

Light Valve R

Figure 2-18 Note: Light valves in the ELP-3300 have greater light transmission and are approximately 1.5 times brighter than the light valves in the ELP-3000. Since the light valves are liquid crystal shutters, they have specific features, depending on the ambient temperature. At low temperatures, reaction speed is fast. After-image, light contrast, or thinner color may occur. At high temperatures, reaction speed is activated, and the whole image seems dark.

2-18


2.9.2 PRISM UNIT This section is provided for informational purposes only! The prism unit creates the three lights that are transmitted through the light valve.

Prism Unit

Figure 2-19

Figure 2-20

2-19


2.10 PROJECTOR LENS The projector lens unit has a zoom function (*1.4) and focus adjustment function. Zoom Ring

Figure 2-2

Figure 2-21

2-20

Focus Ring


2.11 LAMP HOUSING The lamp housing consists of a metal halide lamp, safety switch, and filter. Safety Switch

Figure 2-22

Figure 2-23

Figure 2-24

Figure 2-25

◊

The life expectancy of the light source valve is 700 hours. When the operating time exceeds 700 hours, the lamp indicator on the control panel blinks red and green. If you encounter this condition, replace the light source valve as soon as possible.

◊

The safety switch detects overheating. If the temperature exceeds the safety zone because of abnormal lamp conditions, this switch shuts down the power.

2-21

EPSON ELP-3000/3300 Service Manual ◊

The filter eliminates ultraviolet rays harmful to the light valves before outputting light to the light guide block. If the filter is not mounted, it shortens the life of the R/G/B light valves.

2-22

Chapter 3 Disassembly and Assembly


3.1 Disassembly and Assembly Procedures This section explains how to disassemble the projector. The assembly procedure is the exact reverse of the disassembly procedure.

Preparation 1) Remove any rings, watches, cuff buttons, or other metal accessories that are likely to come into contact with the equipment. 2) Wear gloves. 3) Wear a wrist band and ground it. Place a ground mat under the unit. 4) Turn off the main unit and the host computer. 5) Unplug the power cord from the main unit and service outlet. 6) Disconnect the interface cable from the main unit. 7) Clean the air filter, interface, and case cover with a vacuum cleaner.

Required Tools and Accessories Prepare the tools and accessories listed in the table below. Table 3-1

Name Flat blade (-) screwdriver

Quantity 1

Supplier Commercial

Phillips screwdriver 2 Tweezers

1

Commercial

1

Commercial

Brush

1

Commercial

Vacuum cleaner

1

Commercial

Paper wiper

Several

Commercial

Air blower

1

Commercial

Gloves Wrist band, ground mat

1 1

Commercial Commercial

Use Removal of the power connector for the light Disassembly of the case and interior To unlock the FPC connector on the DR board To brush off the dust around the fan To clean the light valves and filter To clean the projector lens To clean the light bulb To avoid cuts To avoid electrostatic effects

Precautions Read the precautions given in individual assembly and disassembly procedures carefully before starting the procedure. General precautions are given below. When you disassemble the projector main unit, dust sticking to internal fans and air filters is likely to migrate and contaminate the R, G, and B light valves, which are the heart of the display mechanism, causing display quality to deteriorate. Therefore, before reassembling 3-1


the projector, check the light valves for dust and, if necessary, clean them with a vacuum cleaner. The R, G, and B light valves and circuit board assemblies are highly sensitive to static electricity. When you remove a light valve block, place it in an antistatic bag immediately. When you perform assembly or disassembly operations listed below, check the unit, its peripheral lens, and glass surfaces for any dirt before reinstalling them. If the unit is dirty, clean it with isopropyl alcohol. The speaker unit contains a permanent magnet. Keep it away from electromagnetic media such as diskettes and magnetic cards. Handle the projector lens and light guide units with care, as they are highly susceptible to vibration and shock. Do not try to disassemble any part (for example, the power supply unit) not covered in this manual.

Operations that Require Adjustments and Checks When you replace one of the components listed in the table below, you need to perform the checks and adjustments explained in Chapter 5. Perform necessary adjustments and checks before reinstalling the upper case unit. Table 3-2

Replace Driver board Flash ROM Video board Power supply Optical assembly Light guide assembly

Adjustments and Checks Check and adjust images for flicker, ghost, and subcontrast. (See Section 5.1.)

Check and adjust focus alignment; perform image quality adjustments. (See Section 5.1)

3-2


3.2 PROJECTOR MAIN UNIT DISASSEMBLY AND ASSEMBLY The flowchart for disassembling the projector main unit is shown below. You can reassemble dismantled projector parts by reversing the order of disassembly. Therefore, unless specifically specified, this manual contains no assembly procedures. Detailed descriptions of disassembly procedures are given in sections 3.2.1 through 3.2.16. START

LAMP UNIT

RECEPTOR

(3.2.1)

SPEAKER UNIT (3.2.4)

BOARD (REAR)

LIGHT VALVE BLOCK ASSEMBLY (3.2.10)

(3.2.6) UPPER CASE

RECEPTOR

(3.2.2)

DRIVER BOARD

FRONT CASE

BOARD (FRONT)

(3.2.3)

(3.2.5)

(3.2.6)

REMOTE CONTROL

HEAT SHIELD A/B

3.3)

THERMISTOR (3.2.7)

FOOT ADJUSTER (3.2.15) (B)

(A)

(C)

SAFETY SWITCH (3.2.9)

EXHAUST FAN

LAMP HOUSING

UNIT (3.2.8)

(3.2.11)

(A)

INTERFACE VIDEO BOARD (3.2.12) BOARD RETAINING PLATE/HEAD COVER (3.2.16)

POWER SUPPLY (3.2.14)

Figure 3-1

3-3

BOARD (3.2.13)

(B) (C)


3.2.1 Removing the Lamp Inner Housing Prerequisites: None.

Lamp Cover

Screws (1)

Stop Rings

Lamp Unit

Figure 3-3

Screws (2)

Lamp Inner Housing Fixing Screws Stop Rings Lamp Cover Unit

Lamp Cover Fixing Screws

Figure 3-2 Handle

Figure 3-4

Lamp Inner Housing

1.

Remove the lamp cover mounting screws from the main unit bottom plate and remove the lamp cover. Screws: +M4×7.5 F/Ni: P/N 1021771 Mounting torque: 4.5 kg cm = 3.9 lb inch

2.

Remove two lamp inner housing mounting screws. Screws: +M4×7.5 F/Ni: P/N 1021771 Mounting torque: 4.5 kg cm = 3.9 lb inch

3.

Pull up the handle on the lamp outer housing and remove the lamp unit.

3-4


Warning: •

•

The lamp unit is very hot immediately after use and may cause burns if handled carelessly. Before removing the lamp unit, check the temperature of the lamp inner housing unit. To prevent the reflector from being contaminated, take care not to touch it when installing the lamp unit.

3-5


3.2.2 Removing the Upper Case Unit And Handle Screw (6)

Prerequisites: None.

Dust Guard Filter Unit Handle Holder Case Fixing Screws

Figure 3-7

Case Fixing Screws

Figure 3-5 Figure 3-8

Screws 3

Figure 3-6

Figure 3-9

1.

Insert the tip of a flat-head screwdriver in the recessed portion of the dust guard filter and lift up gently. Remove the screw beneath the dust guard filter (Figure 3-7). Screw: +M4×10 F/Zn: P/N 1022793 Mounting torque: 6.0 kg cm = 5.2 lb inch

2.

Pull the handle up. Insert the spring hook into one of the holes in the handle holder cover (Figure 3-9). Press the spring hook down at an angle in the direction of the hole on the opposite side of the handle holder cover, then gently push up. (At this point, the center of the handle cover should be bent to form an arch, as illustrated in Figure 3-9.) Caution: The handle holder cover has claws on both ends. These may be damaged if you insert the spring hook into one of the holes and simply pull up.

3-6

EPSON ELP-3000/3300 Service Manual Upper Case Fixing Screws B

Screw (5)

Upper Case Unit

Figure 3-11 (Bottom)

Screws (3) Upper Case Fixing Screw A

Figure 3-12

Figure 3-10

Figure 3-13 3.

Remove 2 screws located beneath the handle holder cover (Figure 3-12). Screws: +M4×10 F/Zn: P/N 1024188 Mounting torque: 6.0 kg cm = 5.2 lb inch

4. Remove 4 case unit fixing screws on both sides of the projector (Figure 3-6). Screws: +M4×8 F/Ns P−Tight: P/N 10004394 Mounting torque: 6.0 kg cm = 5.2 lb inch 5.

Remove the lower case fixing screw (Figure 3-11). Screw: +M4×8 F/Zn: P/N 1024188 Mounting torque: 6.0 kg com = 5.2 lb inch

6.

Hold the left and right sides (handle and fan guard sides) of the upper case unit and gently pull the handle straight up to remove it.

3-7


3.2.3 Removing the Driver Board Block Prerequisite condition: Remove the upper case unit and handle (section 3.2.2). 12

7

4

5

1

3

10 9 11

8

6

Figure 3-14 2

1.

Remove 11 wire cables and FPC cables from the driver board block. The cables are summarized in the table below.

Table 3-3 Cable Connector Connector Cable Type Numbe (ELP-3000) (ELP-3300) r 1 CN802 CN622 BLK/WHT 2 CN803 CN623 BlK/WHT 3 CN805 CN913 YEL/RED/BLK 4 CN806 CN912 YEL/RED/BLK 5 CN807 CN910 BLK/RED/WHT 6 CN808 CN911 BLK/RED/WHT 7 CN810 CN914 BLACK 8 CN805 CN860 FPC 9 CN806 CN875 FPC 10 CN810 CN890 FPC 11 CN815 CN624 PINK

Use and Remarks

Speaker Unit (Right) Speaker Unit (Left) Intake Fan Exhaust Dan RCF (Front Receptor) RCR (Rear Receptor) Thermistor Light Valve R Light Valve G Light Valve B Power Supply Unit (Fan)

Caution: Before disconnecting cables 8, 9, and 10 from their connectors, gently pull each connector straight up to unlock it.

3-8

EPSON ELP-3000/3300 Service Manual Driver Board Fixing Screws

Windbreak Plate

Figure 3-16 Resetting connector locks Driver Board Assembly

Figure 3-17 Connecting the driver board block and interface board assembly Figure 3-15 2.

Remove 2 mounting screws from the windbreak plate, then remove the windbreak plate (Figure 3-15). Screws: +M3×6 F/Zn: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch

3. Remove the 7 mounting screws from the driver board block. Screws +M3×6 F/Zn: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch 4.

Remove the power supply cable.

5. Grasp the driver board block on the left side (the side where LED lamps and push button switches are installed) and disconnect the connectors from the interface board assembly. 6. Pull the driver board straight up.

Caution: •

•

The back side of the ELP-3300 driver board is covered by a shielding plate, and IC680 has a heat sink. These components are regarded as separate from the driver board and are not included in this procedure. To avoid malfunctions caused by broken wires or flaked soldering, never apply mechanical stress to the board. 3-9


3.2.4 Removing the Speaker Units Prerequisites: Remove the upper case unit and handle, and the driver board block (sections 3.22 and 3.23).

Speaker Unit

Screws (2)

Screws (2)

Screws (2)

Speaker Fixing Screws

Speaker Unit

Figure 3-19 Figure 3-18 When removing both the speaker units and the bracket: 1.

Unplug the cable from connector CN802 (right) or CN803 (left) on the driver board block.

2. Remove the speaker unit mounting screw that connects each speaker unit to the bracket. (See the 2 center screws pictured in Figure 3-19.) Then remove the speaker units and the bracket. Screws: +M3×6 F/Zn: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch When removing only the speaker units: 1.

Remove 2 mounting screws that secure each speaker unit to the frame, then remove the speaker units. (There are 4 screws connecting the speaker units to the frame. See Figure 3-19.) Screws: +M3×6 F/Zn sems B: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch)

Caution: The speaker unit incorporates a permanent magnet. Keep it away from • electromagnetic media such as diskettes and magnetic cards. When mounting a speaker unit on a bracket, align the boss on the bracket with the • mounting hole. 3-10


3.2.5 Removing the Front Case Unit Prerequisites: Remove the upper case unit and handle, and the driver board block (sections 3.2.2 and 3.2.3).

Front Case Fixing Screws (2)

Front Case Unit

Figure 3-20 Screws (2)

Figure 3-21 1.

Remove 2 front case unit mounting screws (Figure 3-21). Screws: +M3×8 F/Zn: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch

2. Pull the front case unit straight out. Note: When you loosen the front case mounting screws, the screwdriver may come into contact with the bracket attached to the left speaker unit. Remove the bracket if you have trouble loosening the screws. 3-11


3.2.6 Removing the Receptor Board Assembly The projector has two identical receptor board assemblies in the front and rear of the unit. The procedures for removing these board assemblies are explained separately below. Removing the rear receptor board assembly Prerequisite: Remove the upper case unit and handle (section 3.2.2).

Claw

1.

2.

Figure 3-22 Locate and straighten the claws on the frame of the power supply unit, which is connected to the receptor board assembly (Figure 3-22). Unplug the cables from connectors CN808 and CN803 on the driver board block (CN623 and CN911 for the ELP-3300). Remove the receptor board assembly.

Caution: When installing the receptor board assembly, align 2 holes in the board with the bosses on the power supply unit frame before attaching the assembly. Removing the front receptor board assembly Prerequisites: Remove the upper case unit, handle, driver board block, and front case unit (sections 3.2.2, 3.2.3, and 3.2.5). Screw (1)

Figure 3-23 1.

Remove the fixing screw securing the receptor board assembly, then remove the assembly. Screw +M3×6 F/Zn: P/N 1004539 Mounting torque: 4.5 kg cm = 3.9 lb inch 3-12


Caution: When installing the receptor board assembly, align the hole in the board with the hole in the speaker bracket before tightening the screw.

3.2.7 Removing the Thermistor and Heat Shield Plates A and B Prerequisites: Remove the upper case unit, the handle, and the driver board block (sections 3.2.2 and 3.32.3). Heat Shield Fixing Screw A Heat Shield Fixing Screw B

Thermistor Fixing Screw

Screw (1)

Thermistor Heat Shield A

Screw (2)

Heat Shield Fixing Screws A

Heat Shield B

Figure 3-25

Screws (2)


Figure 3-27 1.

Remove 2 mounting screws on heat shield plate B. Pull heat shield plate B straight up. Screws: +M3×6 F/Zn sems B: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch

2.

Remove the thermistor fixing screw from heat shield plate A, then remove the thermistor. Screw: +M3×6 F/Zn sems B: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch 3-13


3.

Remove 2 mounting screws on heat shield plate A. Pull heat shield plate A straight up. Screw: +M3×6 F/Zn sems B: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch

Caution: When installing heat shield plate A, take care not to allow the safety switch cable (for overheat protection) to be caught.

3-14


3.2.8 Removing the Exhaust Fan Unit Prerequisites: Remove the upper case unit and handle, and the driver board block (sections 3.2.2 and 3.2.3). Exhaust Fan Unit Fixing Screw

Exhaust Fan Unit

Lamp Connector

Screw (1)

Figure 3-29

Figure 3-28

Screws (3)

Figure 3-30 1.

Remove the exhaust fan unit mounting screw (Figure 3-29). Screw: +M3×6 F/Zn sems B: P/N 102186 Mounting torque: 4.5 kg cm = 3.9 lb inch

2. Hold the power supply unit against the rear wall as you pull the exhaust fan unit straight up. (As you remove it, the sides of the exhaust fan unit will touch the power supply unit frame.) 3. Remove 3 bracket fixing screws from the exhaust fan unit (Figure 3-30) and separate the bracket from the fan. Screws: +M4×10 F/Zn: P/N 1022793 Mounting torque: 6.0 kg cm = 5.2 lb inch Caution: When installing the exhaust fan, use care with its orientation. Installing the fan in the • reverse orientation may result in a device failure or extended cooling time because of 3-15


•

overheating. Make sure the label on the fan faces out. The exhaust fan unit and its peripherals are susceptible to dust and dirt. When installing the exhaust fan unit, check it for dirt and clean it if necessary.

3-16


3.2.9 Removing the Safety Switch Prerequisites: Remove the upper case unit, handle, driver board block, heat shield plates A and B, and thermistor (sections 3.2.2, 3.2.3, and 3.2.7). Safety switch


1.

Screws (2)

Disconnect the Fast-on tab terminals for the 2 cables (blue/white) connected to the safety switch.

2. Remove 2 mounting screws from the safety switch and detach the safety switch. Notice that 3 plain washers (M3) are inserted between the safety switch and the frame (lamp outer housing unit). Screws: +M3×6 F/Zn: P/N 1021816 Mounting torque: 4.5 kg cm = 3.9 lb inch Caution: When removing the Fast-on terminals, do not apply excessive force to the terminals on • the safety switch in the horizontal or vertical direction. The polarity of the cables (blue/white) is not significant; connect them to any terminals • on the safety switch.

3-17


3.2.10 Removing the Light Valve Block Prerequisites: Remove the upper case unit, handle, driver board block, speaker units, front case unit, thermistor, and heat shield plates A and B (sections 3.2.2, 3.2.3, 3.2.4, 3.2.5, and 3.2.7). Positioning bosses

Light Valve Block Fixing Screws (2)

Light Valve Block Fixing Screw Light Valve Block Fixing Screw

Optical Head Block

Figure 3-34

Figure 3-33 1.

Remove 4 mounting screws on the light valve block. Screws: +M4×14 F/Zn: P/N 102815 Mounting torque: 6.5 kg cm = 5.6 lb inch

2. Holding the light valve block by the optical head block at the front and the filter unit at the back, pull it straight up.

Caution: When installing the light valve block, align the holes in the aluminum frame with the 2 positioning bosses on the lower case unit (Figure 3-34).

3-18


3.2.11 Removing the Lamp Outer Housing Unit Prerequisites: Remove the lamp unit, upper case unit, handle, driver board block, thermistor, heat shield plates A and B, exhaust fan unit, and light valve block (sections 3.2.1, 3.2.2, 3.2.3, 3.2.7, 3.2.8, and 3.2.10). Lamp Outer Housing Unit Fixing Screws

Lamp Outer Housing Unit Fixing Screw Safety Switch

Figure 3-36

Lamp Outer Housing Unit

Figure 3-37


Connector

1.

Figure 3-38 Disconnect the Fast-on tab terminals for the 2 cables (blue/white) connected to the safety switch.

2. Disconnect the connector on the lamp outer housing unit (Figure 3-38) and remove the cable from the lamp outer housing frame. To disconnect the connector, use a flat-head screwdriver to pull the locking hook outward. 3. Remove 3 mounting screws from the lamp outer housing unit, then remove the lamp outer housing unit. Screws: +M3×14 F/Zn: P/N 102814 Mounting torque: 4.5 kg cm = 3.9 lb inch Caution: The lamp outer housing unit incorporates a glass shield. Take care not to allow the glass surface to be exposed to shock or contaminated. 3-19


3.2.12 Removing the Video Board Assembly Prerequisites: Remove the upper case unit and handle, and the driver board block (sections 3.2.2 and 3.2.3). Screw (1) Board Block Fixing Screw

Interface Board/Video Board S. Plate Fixing Screw

Shield Plate Fixing Screw Video Board Assembly

Board Block Fixing Plate

Figure 3-40

Interface Board Assembly Fixing Screw Interface Board/Video Board S. Plate Fixing Screw

Interface Board Assembly Fixing Screw

Interface Board Assembly

Figure 3-39 1.

Screws (2)

Figure 3-41

Remove the screw securing the bracket on the left speaker unit; then remove both the speaker unit and the bracket. Screw: +M3×6F/Zn sems B: P/N 102816 Mounting torque: 4.5 kg cm = 3.9 lb inch

2. Remove 2 mounting screws on the video board assembly (Figure 3-41). Screws: +M3×4 F/Zn: P/N 102814 Mounting torque: 4.5 kg cm = 3.9 lb inch 3. Hold both edges of the video board assembly and pull it straight up. Locate the 2 connectors on the bottom of the assembly that are connected to the interface board assembly. Disconnect them. Caution: When removing the video board assembly, take care not to twist the connectors • located on the bottom of the assembly. The video board for the ELP-3300 has a shield plate, while the video board for the • ELP-3000 does not. Ignore the shield plate in Figure 3-41 if you are working on the ELP-3000.

3-20


3.2.13 Removing the Interface Board Assembly Prerequisites: Remove the upper case unit, handle, driver board block, and video board assembly (sections 3.2.2, 3.2.3, and 3.2.12). Screw (1)

Screw (M36)

Screw (1)

Figure 3-42

Figure 3-43 1.

Remove 3 mounting screws on the interface board assembly (Figure 3-42). Screws: +M3×4 F/Zn: P/N 1022795 Mounting torque: 4.5 kg cm = 3.9 lb inch Screw: +M3×6 F/Zn: P/N 1021824 Mounting torque: 4.5 kg cm = 3.9 lb inch

2. Lift one edge of the interface board assembly slightly and slide it toward the center before removing the board. Caution: When installing the interface board assembly, align the 2 positioning holes in the board with the bosses on the board plate before tightening the screws. 3-21


3.2.14 Removing the Power Supply Unit Prerequisites: Remove the upper case unit, handle, driver board block, thermistor, heat shield plates A and B, and rear receptor board assembly (sections 3.2.2, 3.2.3, 3.2.6 [rear only] and 3.2.7). Power Supply Unit Fixing Screw

Power Supply Unit Fixing Screws (3)

Lamp power cable

Power Supply Unit Fixing Screw Power Supply Unit

Inlet Cover

Safety Switch Fixing Screws (2) Safety Switch

Figure 3-45 Safety switch


Inlet cover

1.

Disconnect the lamp power supply cable connected to the lamp’s outer housing unit, then disconnect the 2 cables (blue/white) from the safety switch.

2.

Remove 5 mounting screws from the power supply unit (Figure 3-44). Screws: +M3×8 F/Zn: P/N 1021824 Mounting torque: 4.5 kg cm = 3.9 lb inch

3.

Pull the power supply unit and inlet cover straight up.

Caution: When removing the power supply unit, take care not to bend or damage the bosses on the lower case unit. When installing the power supply unit, align the power supply unit positioning holes with these bosses. The intake fan and its peripheral parts in the power supply unit are susceptible to dust and dirt. When installing the power supply unit, check the fan for dirt and clean it if necessary.

3-22


3.2.15 Removing the Adjustable Foot Unit Prerequisites: Remove the upper case unit, handle, driver board block, and speaker units (sections 3.2.2, 3.2.3, and 3.2.4). Foot Adjuster Plate Fixing Screws(2) Foot Adjuster Unit

Foot Stopper Nut Foot Adjuster Plate

Foot Stopper Button Foot Stopper Spring

Figure 3-47

Figure 3-48

Figure 3-49 Screws (2)

Adjustable feet

Figure 3-50 1.

Press the foot adjuster button to lower the foot to its lowest position.

2.

Remove the nut at the top of the foot adjuster unit.

3.

Turn the adjustable foot counterclockwise to remove it.

4.

Remove 2 mounting screws on the foot adjuster plate, then remove the adjuster plate. Screws: +M4×8 F/Zn: P/N 1021814 Mounting torque: 4.5 kg cm = 3.9 lb inch

5. Remove the foot stopper button from the foot adjuster plate.

3-23


Caution: • •

When installing the adjustable foot unit, use a pair of tweezers to position the foot stopper spring so that it catches in the frame in the lower case unit. To avoid damaging it, only disassemble the adjustable foot unit when replacing it.

3-24


3.2.16 Removing the Board Retaining Plate and Head Cover Prerequisites: Remove the upper case unit, handle, driver board block, speaker units, front case unit, thermistor, heat shield plates A and B, and light valve block (sections 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.7, and 3.2.10). Board Fixing Plate Fixing Screws (2)

Board Fixing Plate

Figure 3-52

Lower Head Cover Fixing Screw A Lower Head Cover Fixin Screw B Lower Head Cover Fixing Screws A (2)

Lower Head Cover

Lower Head Cover Fixing Screw A

Figure 3-53

Figure 3-51 1.

2.

Remove 2 fixing screws on the board retaining plate, then remove the board retaining plate. Screws: +M3×8 F/Zn: P/N 1021824 Mounting torque: 6.5 kg cm = 5.6 lb inch Remove 5 lower head cover mounting screws, then remove the head cover. Screws: +M3×8 F/Zn P/N 1021824 Mounting torque: 6.5 kg cm = 5.6 lb inch Screws: +M3×6 F/Zn: P/N 1021826 Mounting torque: 4.5 kg cm = 3.9 lb inch

Caution: When installing the lower head cover, position the intake fan cable in the notch in the frame before tightening the screws.

3-25


3.3 Replacing the Batteries in the Remote Control Unit Follow these steps to replace the batteries in the remote control unit: 1. 2.

Remove the battery cover from the rear panel of the remote control unit, then remove the 2 battery cells. Insert the new battery cells, taking care to match negative cell end to negative terminal, and positive cell end to positive terminal.

Figure 3-54

Note: Don’t disassemble the remote control unit. The unit itself is handled as a service part; its components are not designated as service parts.

3-26

Chapter 4 Troubleshooting


4.1 Before Starting Troubleshooting Procedures 1. 2. 3. 4. 5.

Before you replace a unit or sub-assembly, double-check that it is actually defective. (For example, check that cables are connected properly.) Find the points you want to check by examining the flowchart, and check those items during the troubleshooting procedure. See instructions in Chapter 3, “Disassembly and Assembly,” to replace projector units. Before making a functional check, check connections. After replacing any unit listed below, make the image adjustments explained in Chapter 5. Table 4-1


Adjustments and Checks Check and adjust images for flicker, ghost, and subcontrast. (See Section 5.1.)

Check and adjust focus alignment; perform image quality adjustments. (See Section 5.1)

4.1.1 Tools and Accessories Required for Troubleshooting Tools and accessories required for projector troubleshooting (including fault isolation) are listed below. Table 4-2

Name Projector screen Rule (10 feet, 3 m) Host computer Color display Video equipment

Quantity 1 1 1 1 1

External speaker unit Test program diskette Multimeter Tool set Illuminometer Color meter (chronometer)

1 1 1 1 set 1 1

Use/Remarks To project images To measure the projection distance To supply test patterns (PC-compatible) To manipulate and display on host computer To test source 2 (video input) (video deck, video camera, etc.) To test voice output (with audio cable terminals) To adjust image quality To measure resistance and voltage (AC/DC) Tools and accessories listed in Section 3.1 To measure illuminance To measure R, G, and B components

4-1


4.2 First Action Follow the flowchart shown below when starting to troubleshoot projector problems and proceed to the pertinent detailed flowchart (given on the next and subsequent pages). START

If you cannot isolate the Is there a cosmetic

Yes

problem, such as case,

reproduce the error?

using the

handle, or projection lens?

instructions in

No

Chapter 3.

No LED display or fan

problem, can you

Replace the part

∗

Yes

(heat/exhaust) problem?

environment Go to “System

(temperature,

Initialization.”

condensation) and AC

No

input power. ∗

Light source lamp or test

Yes

screen display problem?

Try to replace input devices (host

Go to “Display

computer and video

Mode.”

equipment) and their

No

Host computer or video

Check the operating

cables. Yes

Go to “Video Display Mode.”

display problem?

No Host computer or video

Yes

audio problem?

Go to “Audio Mode.”

∗

No

Projection Image quality

The problem may be attributable to static

Yes

problem?

electricity. Check to Go to “Picture

ensure that power

Quality.”

cords to the projector

No

and input devices are Yes

Remote control problem?

grounded properly.

Go to “Function 1.” ∗

Reconnect the Interface cables and

No RS-232C interface

internal cables. Yes

∗

Go to “Function 2.”

If the problem still persists, try replacing

problem?

the driver board block and driver board assembly.

Figure 4-1

4-2

Yes


SYSTEM INITIALIZATION START

Turn on power

Does the POWER LED

Yes

Do the fans

Yes

work?

li ht? No

Check CN805 and CN806 (912/913) on the driver

and the driver board

board

POWER LED

“Display

normal?

Mode” No

Reconnect the cable

Yes

Do the fans

No

Check CN810 (914) on the driver board.

Is the Yes

work now?

light now?

temperature

Yes

normal now? No

Replace the control panel

Yes

temperature

No

between the control panel

Does the

Go to

Is the

No Replace

Replace fans.

the thermistor

Does the POWER LED

Yes

Do the fans work now?

light now? No Replace the driver board.

Does the POWER LED

Yes

Is the temperature normal now?

No

No

Replace the driver

Replace the driver

board.

board.

Yes *Values enclosed in parentheses apply to the ELP-3300.

light now? No Replace the power supply

Yes

If you replace the driver board, you need to adjust the picture quality. (See Chapter 5.)

Figure 4-2

4-3


DISPLAY MODE START (System init is OK)

Go to Does the lamp

Yes

light?

Does the test screen appear?

Yes

Does the menu key work normally?

Yes

“Video Display Mode.”

No

No

No

Try the lamp timer

Check CN811, 812, 813 (860,

Replace the driver

reset.**

875, 890) connections on the

board.

driver board

Does the lamp

Yes

light now? No

Yes

No

Replace the lamp.

Does the lamp

Does the test screen appear now?

Replace the driver board.

Yes

light now?

Does the test screen appear now?

Yes *

Values enclosed in parentheses apply to the ELP-3300.

No

No Replace the

** Ignore this step if you are

Replace the power supply

troubleshooting the ELP-3000.

driver board.

Does the lamp


Yes

light now? No Replace the power supply.

Figure 4-3

4-4


Video Display Mode

START (Display Mode is OK) Go to Check the projector with a PC. Is PC input OK?

Yes

Is loop throughput OK?

No

Is video input OK?

No

Replace the driver board.

Is PC input OK now?

Yes

Yes

Replace the video

Does the brightness control work with the video menu?

No Replace the video

Replace the video

board.

board.

board.

Is loop throughput OK now?

Yes

Is video input OK now?

Yes

“Audio Mode.”

No

Replace the video

No No

Yes

Yes

Does the brightness control work now?

No

Yes

No

Replace the

Replace the driver

Replace the driver

interface board.

board.

board.

board.

Is PC input OK now?

Yes

Is video input OK now?

Yes

No No

Replace the

Replace the driver

interface board.

board.

* Values enclosed in parentheses apply to the ELPIs PC input OK now?

No

3300.

Yes


Replace the interface board.

Figure 4-4

4-5


Audio Mode

START(Video is OK)

Go to Is speaker output OK?

Yes

Yes

Is audio out OK?

Does the volume

Yes

adjustment work with

Quality.”

the remote control? No

No

No

Check CN802, 803 (622,

Replace the video

Replace the video

623) on the driver board.

board.

board.

Is the speaker output OK now?

Yes

Does the volume adjustment work now?

OK now?

No

Replace the speakers.


Yes

Is audio out

No

“Picture

Yes

No

Replace the interface

Replace the driver

board.

board.

Yes *

Values enclosed in parentheses apply to the ELP3300.

No Replace the video board.



Yes

No Replace the driver board.


Yes

No Replace the interface board.

Figure 4-5

4-6


Picture Quality

START (Audio is OK.)

No

Are there ghosts?

Is there any flicker?

Yes

No

balance.

Is there still

No

flicker?

Yes

Is the white balance OK now?

Yes

Yes

No

Replace the driver

Replace the driver

Replace the driver

board.

board.

board.

Are there still ghosts?

Yes

“Function 1.”

Adjust the white

Adjust the flicker.

No

Are there still ghosts?

Go to

No

Yes

Adjust the ghosts

Yes

Is the white balance OK?

No

Is there still flicker?

No

Is the white balance OK now?

Yes

Yes

No

Replace the

Replace the

Replace the

optical head unit.

optical head unit.

optical head unit.

If you replace the driver board or the optical head unit, you need to adjust the picture quality. (See Chapter 5.)

Figure 4-6

4-7


Function 1 (Remote Control)

START (Picture quality is OK)

Does the wireless remote control work?

Go to Yes

Does the wired remote control work?

No

Yes

Replace the remote

control cable.

control.

Yes

Does the wired remote control work now?

Do all the buttons work now?

No Replace the interface

Replace the driver

(910, 911)

board.

board.

on the driver board.

Yes


Yes

No

No

Replace the driver

Replace the remote

board.

control.

Does the wireless remote control work now?

Yes


Replace the driver

Yes

*

Values enclosed in parentheses apply to the ELP-3300.

No

No

board.

Yes

No

Check CN807,808


“Function 2.”

No

Replace the remote

No

Yes

work?

No

Replace the batteries.


Do all buttons

Yes

Replace the video board.


Figure 4-7

4-8


Function 2

START (Function 1 is OK.)

Does the RS232

Yes

Does DC Out

END

work?

cable work? No

No

Replace the RS232 cable.

Does the RS232

Yes

Replace the DC Out cable

Yes

cable work now?

Does DC Out work

Yes

now?

No

No

Replace the video board.

Replace F300 on the interface board.

Does the RS232

Yes

cable work now?

now?

No

No


Does the RS232

Yes

Does DC Out work


Yes

cable work now?

No Replace the driver board. If you replace the driver board, you need to adjust the picture quality. (See Chapter 5.)

Figure 4-8

4-9


4-10

Chapter 5 Image Adjustment Program


5.1 Image Adjustment Program This program diskette contains the adjustment functions in the table below. Table 5-1 Number Image adjustment program function 1 Flicker adjustment using a 16-level grayscale pattern 2 Ghost adjustment using a vertical stripe pattern 3 Sub contrast (tint) adjustment using a 16-level grayscale pattern To run this program, set up a host computer and monitor, and connect them to the projector using a computer cable and an RS-232C cable. Insert the image adjustment program diskette in the diskette drive, and run the program. A menu appears. Select the menu options and program the settings into the flash ROM on the projector’s main board.

Monitor cable Computer cable

Projector

RS-232C cable

Host Computer

Monitor Diskette

Figure 5-1

5.1.1 When to Use the Image Adjustment Program If you replace one of the components listed in the table below, you must make the specified adjustments in the image adjustment program. This program specifies the electrical parameters required to ensure that you obtain the best display quality.


Table 5-2 Adjustments and Checks Check and adjust images for flicker, ghost, and subcontrast.

Check and adjust focus alignment; perform image quality adjustments. (See Section 5.1.)

5-1


5.1.2 Running the ELP-3000 Image Adjustment Program This section provides instructions for running the ELP-3000 image adjustment program. For information on running the ELP-3300 image adjustment program, see Section 5.1.3. The image adjustment program is supplied on an MS-DOS diskette. Follow the messages in the image adjustment program as you select menu options. When menu options 2 through 5 are executed, the image adjustment program transfers the adjusted settings to the projector’s RAM via the RS-232C interface. Unless you save these settings, they are lost and invalid when the projector is restarted. Therefore, once you make adjustments in the image adjustment program, choose menu option 6, "Data Transfer," to program settings into the projector’s flash ROM. * Do not use menu option 8 (Set ROM Initialization) unless specifically told to do so. Start image

Choose menu

Choose menu option

adjustment

options 1 to 5

6 (Data Transfer)

program

(Adjustments)

END

Figure 5-2 1. Place the screen about 8 feet (2.4 m) away from the projector. 2. Turn on the projector and host computer. 3. Adjust the focus ring on the projector so that the projected image on the screen is in focus. Use the zoom ring to set the screen projection size to 60 inches.

Start-up Procedure MS-DOS or Windows 3.1 system 1. Insert the image adjustment program diskette into the diskette drive. 2. Make sure the computer screen displays the C:\> prompt. If Windows 3.1 is running, select the MS-DOS prompt from the Program Manager or exit Windows and display the C:\> prompt. (If the C:\WINDOWS> prompt appears on the screen instead of C:\>, type CD\ then press Enter.) 3. Type A:, then press Enter (C:\>A: Enter). 4. Make sure the A:\> prompt appears on the computer screen. 5. Type CD ELP3000; then press Enter (A:\> CD ELP3000 Enter). 6. Type ELP3000, then press Enter.

5-2


After the program starts, the following menu appears on the computer screen. ***MAIN MENU*** 1 2 3 4 5 6 7 8 9

Set LCP communication mode Flicker Adjustment Sub Contrast adjustment Ghost adjustment Brightness survey Data Transfer Reset LCP communication mode Set ROM initialization END

Select the number [1-9] Figure 5-3 8. Type 1 and then press Enter. The following message appears briefly, followed again by the Main Menu shown in Figure 5-3: ***LCP communication setting***

2. Flicker Adjustment 1. Type 2 from the main menu to adjust the flicker. 2. Make sure the projector displays the 16-level red-scale pattern at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

5-3


***Flicker Adjustment*** COLOR RED Change data using arrow key. Left Arrow Key: down Right Arrow Key: up Select Enter Key: set

Figure 5-4 3. Use the arrow keys to increase or decrease the value by one. Find the display with the minimum flicker. 4. Press Enter, and a 16-level green-scale pattern should appear on the projector screen. 5. Just as in step 3, find the display with the minimum flicker. 6. Press Enter, and a 16-level blue-scale pattern should appear on the projector screen. 7. Find the display state with the minimum flicker. 8. Press Enter again. The following message appears: Flicker data: Rxx(xx) Gxx(xx) Bxx(xx) Are you sure? [Y/N]

9. If flicker adjustment is satisfactory, type Y and then press Enter to return to the Main Menu. Type N to rerun flicker adjustment. 3. Sub-contrast Adjustment 1. Type 3 from the Main Menu to adjust the sub-contrast. 2. Make sure the projector displays the 16-level red-scale pattern section at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

5-4


***Sub Contrast adjustment*** COLOR RED Change data using arrow keys Left Arrow Key: down Right Arrow Key: up Select Enter Key: set

adjustment menu

Figure 5-5 3. Use the right and left arrow keys to adjust the image so that the two color bars on the right side are of equal intensity and are brighter than the other bars. 4. Press Enter, and a 16-level green-scale pattern should appear on the screen. 5. Just as in step 3, adjust so that the two color bars on the right are brighter than the other bars and are of equal intensity. 6. Press Enter, and a 16-level blue-scale pattern should appear on the screen. 7. Adjust so that the two color bars on the right are brighter than the other bars and are of equal intensity. 8. Press Enter, and the following message appears on the screen: Sub Contrast data: Rxx(xx) Gxx(xx) Bxx(xx) Are you sure? [Y/N] 9. Look at the white balance on the screen. If the hue of the 16-level grayscale pattern seems reddish, greenish, or bluish, you must type N and run the sub-brightness adjustment again. If the white balance is satisfactory, type Y. 10. Use the eighth color bar in the 16-grayscale pattern on the projection screen to check the white balance. Type Y if the sub-contrast adjustment is satisfactory. Type N to rerun the sub contrast adjustment. 11. Check for the brightest color bar in the 16-level grayscale pattern. Put a color meter on the projector screen, and measure the chromatophore X and Y. Then plot a measurement value on the diagram below. The plot point should be in the range A-BC-D, as shown in Figure 5-6. If the point is out of range, you should type N, and redo steps 3 to 11. Type Y if the sub-contrast adjustment is satisfactory. Type N to rerun the sub-contrast adjustment. 12. Press Enter. A dark gray screen appears with the following message: Are you sure? [Y/N] 5-5


The image should be gray, without a red, green, or blue tint. If so, type Y. If the image has a red, green, or blue tint, type N to rerun sub-contrast adjustment. 13. Press Enter. A light gray screen appears with the following message: Are you sure? [Y/N] The image should be gray, without a red, green, or blue tint. If so, type Y. If the image has a red, green, or blue tint, type N to rerun the sub-contrast adjustment.

5-6


Figure 5-6

5-7


4. Ghost Adjustment 1. Type 4 from the Main Menu to eliminate ghosts. 2. Make sure the projector displays the 16-level red-scale pattern section at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

*** Ghost adjustment *** COLOR: RED Change data using arrow keys Left Arrow Key: down Right Arrow Key: up Select Enger Key: set

adjustment menu

Figure 5-7 3. Use the right and left arrow keys to make the border line between each color bar in the pattern as thin as possible (for example, with the least overlap in border lines, and no ghost image to the left or right of the border lines). 4. Press Enter, and a 16-level green-scale pattern should appear on the screen. 5. Just as in step 3, adjust the image so the border line of each pattern appears as thin as possible. 6. Press Enter, and a 16-level blue-scale pattern should appear on the screen. 7. Adjust the image so the border line of each pattern appears as thin as possible. 8. Press Enter. The following message appears: Ghost data: Rxx(xx) Gxx(xx) Bxx(xx) Are you sure? [Y/N] 9. Type Y if the ghost adjustment is satisfactory. The Main Menu appears. Type N to rerun ghost adjustment. 5. Brightness Survey This is an optional menu selection to perform a quick check of the sub-contrast survey. It’s used to correct any brightness or color irregularity in the image quality. 1. Type 5, from the Main Menu for Brightness Survey. The image shown in Figure 5-8 appears on the projection screen:

5-8


Brightness survey Figure 5-8

2. Check the brightness and color tone of the image projected on the screen. (Check for overall image brightness, and check to make sure that there are no red, green, or blue color irregularities.) 6. Data Transfer This menu option writes the settings in the projector’s flash ROM. The values you set are not saved in the projector unless you execute this step. Make sure to run this menu option after making any adjustment with the image adjustment program. 1. Type 6 from the Main Menu for Data Transfer. 2. Make sure the following messages appear on the projection screen. ***Data Transfer*** Create New HEX file? [Y/N] F i l e Rxx(xx) N a m e : Gxx(xx) 0 0 4 Bxx(xx) Flicker data File Name: 00400000.gam Sub Contrast data Rxx(xx) Gxx(xx) Bxx(xx) Ghost data Rxx(xx) Gxx(xx) Bxx(xx) 00400000.gam Data Transfer Are you sure? [Y/N] <> Port: COM1 Baud Rate: 9600bps Parity: None Stop Bit: 1 Data Length: 8

Figure 5-9

3. Type Y if all settings are OK. The image adjustment program starts writing values into the projector’s flash ROM. Type N to bring back the Main Menu and rerun adjustments.

5-9


7. Reset LCP Communication Mode Use this menu option when you want to adjust image settings for more than one projector without loading the image adjustment program again. 8. Set ROM Initialization Do not use this menu option unless told to do so. This option initializes all settings stored in flash ROM in the projector. Settings are reset to their factory defaults, making it necessary to readjust the projector with the image adjustment program. If you inadvertently type 8, the screen shown in Figure 5-10 appears. Type N in response to the question “Are you sure?”. ***ROM Initialization***<> Port: COM1 Baud rate: 9600 bps Parity: None Stop bit: 1 Data Length: 8 Down Load Area: Gamma GAMMA File: GMINT.GAM Are you sure? [Y//N] Figure 5-10

8. End Type 9 at the Main Menu to terminate the image adjustment program. The C:\ prompt appears on the computer screen.

5-10


5.1.3 Running the ELP-3300 Image Adjustment Program This section provides instructions for running the ELP-3300 image adjustment program. For information on running the ELP-3000 image adjustment program, see Section 5.1.2. The image adjustment program is supplied on an MS-DOS diskette. messages in the image adjustment program as you select menu options.

Follow the

When menu options 2 through 4 are executed, the image adjustment program transfers the adjusted settings to the projector’s RAM via the RS-232C interface. Unless you save these settings, they are lost and invalid when the projector is restarted. Therefore, once you make adjustments in the image adjustment program, choose menu option 5, "Data Transfer," to program settings into the projector’s flash ROM.

Start image

Choose menu option

Choose menu

adjustment

1; then 2 to 4

option 5 (Data

pro ram

(Adjustments)

Transfer)

END

Figure 5-11 1. Place the screen about 8 feet (2.4 m) away from the projector. 2. Turn on the projector and host computer. 3. Adjust the focus ring on the projector so that the projected image on the screen is in focus. Use the zoom ring to set the screen projection size to 60 inches.

Start-up Procedure MS-DOS or Windows 3.1 system 1. Insert the image adjustment program diskette into the diskette drive. 2. Make sure the computer screen displays the C:\> prompt. If Windows 3.1 is running, select the MS-DOS prompt from the Program Manager or exit Windows and display the C:\> prompt. (If the C:\WINDOWS> prompt appears on the screen instead of C:\>, type CD\ then press Enter.) 3. Type A:, then press Enter (C:\>A: Enter). 4. Make sure the A:\> prompt appears on the computer screen. 5. Type CD ELP3300; then press Enter (A:\> CD ELP3300 Enter). 6. Type ELP3300, then press Enter.

5-11


ELP-3300 Image Adjustment Program Menu After the program starts, the following menu appears on the computer screen. LCP 1 2 3 4 5 6 7 8 9

Image Adjustment Ver 3.00

Set ROM Initialization Flicker Adjustment Ghost Adjustment Sub Brightness Survey Data Transfer

END

Select the number [1-9] Figure 5-12

1. ROM Initialization Type 1. The ROM Initialization menu appears. The following message appears at the bottom of the screen: Are you sure? [Y/N] Type Y. The program feeds data automatically into the registers for gamma registration. The projector displays the red, green, and blue grayscale patterns to allow you to adjust flicker, ghosts, and contrast.

2. Flicker Adjustment 1. Type 2 from the main menu to adjust the flicker. 2. Make sure the projector displays the 16-level red-scale pattern at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

5-12


***Flicker Adjustment*** COLOR RED Change data using arrow key. Left Arrow Key: down Right Arrow Key: up Select Enter Key: set

Figure 5-13 3. Use the arrow keys to increase or decrease the value by one. Find the display with the minimum flicker. 4. Press Enter, and a 16-level green-scale pattern should appear on the projector screen. 5. Just as in step 3, find the display with the minimum flicker. 6. Press Enter, and a 16-level blue-scale pattern should appear on the projector screen. 7. Find the display state with the minimum flicker. 8. Press Enter to return to the Main Menu.

3. Ghost Adjustment 1. Type 3 from the Main Menu to eliminate ghosts. 2. Make sure the projector displays the 16-level red-scale pattern section at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

5-13


adjustment menu

Figure 5-14 3. Use the right and left arrow keys to make the border line between each bar in the pattern as thin as possible (for example, with the least overlap in border lines, and no ghost image to the left or right of the border lines). 4. Press Enter, and a 16-level green-scale pattern should appear on the screen. 5. Just as in step 3, adjust the image so the border line of each color bar appears as thin as possible. 6. Press Enter, and a 16-level blue-scale pattern should appear on the screen. 7. Adjust the image so the border line of each bar appears as thin as possible. 8. Press Enter to return to the Main Menu. 4. Sub Brightness Survey 1. Type 4 from the main menu to adjust the contrast. 2. Make sure the projector displays the 16-level red-scale pattern section at the top of the screen. (Dark patterns appear on the left side; brighter patterns on the right side.)

5-14


adjustment menu

Figure 5-15 3. Use the right and left arrow keys to adjust the image so that the two color bars on the right side are of equal intensity and are brighter than the other bars. 4. Press Enter, and a 16-level green-scale pattern should appear on the screen. 5. Just as in step 3, adjust so that the two color bars on the right are brighter than the other bars and are of equal intensity. 6. Press Enter, and a 16-level blue-scale pattern should appear on the screen. 7. Adjust so that the two color bars on the right are brighter than the other bars and are of equal intensity. 8. Press Enter, and the following message appears on the screen: Are you sure? [Y/N] 9. Look at the white balance on the screen. If the hue of 16-level grayscale pattern seems reddish, greenish, or bluish, you must type N and run the Sub-Brightness Survey again. If the white balance is satisfactory, type Y. 10. Use the eighth color bar in the 16-grayscale pattern on the projection screen to check the white balance. Type Y if the sub brightness adjustment is satisfactory. Type N to rerun the Sub-Brightness Survey. 11. Check for the brightest color bar in 16-level grayscale pattern. Put a color meter on the projector screen, and measure the chromatophore X and Y. Then plot a measurement value on the diagram below. The plot point should be in the range A-BC-D, as shown in Figure 5-16. If the point is out of range, you should type N, and redo steps 3 to 11. Type Y if the sub brightness adjustment is satisfactory. Type N to rerun the Sub-Brightness Survey. 12. Press Enter. A dark gray screen appears with the following message: Are you sure? [Y/N]

5-15


The image should be gray, without a red, green, or blue tint. If so, type Y. If the image has a red, green, or blue tint, type N to return to the Sub Brightness Survey. 13. Press Enter. A light gray screen appears with the following message: Are you sure? [Y/N] The image should be gray, without a red, green, or blue tint. If so, type Y. If the image has a red, green, or blue tint, type N to return to the Sub Brightness Survey.

5-16


Figure 5-16

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Epson LCD Projector ELP-3000,3300 Service

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