Epson Dreamio EMP-TW1000 U Manuale utente

Service Manual

Multi Media Projector

EMP-TW1000

www.electronicsrepair.net

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EMP-TW1000

SEIKO EPSON Revision:A

INTRODUCTION

This Service Manual describes the hardware information necessary for troubleshooting and

field service of the EMP-TW1000 HOME PROJECTOR.

Before starting service on this unit, always check the EPSON website for additional up-to date

service information provided in Technical Information Bulletins.

HOW TO USE THE SERVICE MANUAL

This product lineup offers four types by destinations; EMP-TW1000.

Since they are the same except for a few specifications (see page.1-7 to 1-9), this manual used

EMP-TW1000 to explain the product.

Before you start the maintenance service, read the SAFETY INSTRUCTIONS carefully.

The contents are as follows:

•Safety Instructions: Operator Safety, Maintaining the projector in good condition

•Chapter 1: PRODUCT SPECIFICATION (Part name, System function,

Specification, etc.)

•Chapter 2: THEORY OF OPERATION (Hardware, Internal connection,

Function of units, etc.)

•Chapter 3: TROUBLE SHOOTING

•Chapter 4: DISASSEMBLY & ASSEMBLY (Procedures to disassemble the

main unit)

•Chapter 5: APPENDIX (AS (After Service) menu)

TRADEMARK

EPSON is a trademark of SEIKO EPSON CORPORATION.

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PRECAUTIONS

Some procedures require specific precautions that must be followed, and those will be noted

throughout this manual. Note the following precaution definitions:

WA R N I N G

CAUTION

REASSEMBLY

CHECK POINT

2006 SEIKO EPSON CORPORATION

W ARNING Procedures which, if not strictly observed, could result in personal injury are

described under the heading WARNING

C A U T I O N CAUTION signals a precaution which, if ignored, could result in damage to equip-

ment.

If assembly needs special attention or the procedure is different from the reversed

disassembly procedure, the correct procedure is described under the heading

REASSEMBLY.

CHECK

P O I N T

Important tips for procedures are described under the heading CHECK POINT.

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Manual Revision History

Service memo

Make a note here of important technical information from Technical Information bulletins.

History Date Detail of change

Rev.A 2006.11.02 First Release

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SAFETY INSTRUCTIONS

1. MAINTAINING OPERATOR SAFETY

1. PREVENTING ELECTRIC SHOCKS

•Turn off the power switch and disconnect the power cord from the AC outlet before car-

rying out any disassembly and assembly work on this projector.

•If power needs to be supplied to the projector while the cover is removed (such as when

making adjustments), take off any metallic objects such as wristwatches, shirt cuff but-

tons, rings and tie pins which may pose the danger of coming into contact with the pro-

jector.

2. PREVENTING INJURY

•Do not touch the lamp assy and the area around it with bare hands immediately after

turning the power off, or even after cool-down period is completed since the lamp and

the area around it may still remain hot.

•When removing the cover in order to carry out adjustments while power is being sup-

plied to the projector, be careful not to touch the fans (intake and exhaust).

•Always wear gloves when disassembling and reassembling the projector in order to

avoid injury from metallic parts with sharp edges.

•Do not look directly into the projector's lens while power is being supplied to the projec-

tor, otherwise your eyes may be injured.

3. PREVENTING ACCIDENTS

•Place the projector on a stable, level surface when carrying out any repair or adjustment

work, to prevent the projector and its components from slipping and falling down. Fur-

thermore, do not place any tools or projector components on top of or underneath the

projector.

•Avoid working on the projector in places where other people might receive injuries from

touching the projector while it is in a state of disassembly. Furthermore, do not leave the

projector unattended in the workplace at such times.

•When turning on the projector's power, always use the accessory power cord to connect

the projector to the power supply, and always make sure that the power supply is prop-

erly grounded.

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2. MAINTAINING THE PROJECTOR IN GOOD CONDITION

1. PREVENTING STATIC ELECTRICAL DAMAGE

•When disassembling and assembling the projector, always use a grounding strap and a

grounding mat. Furthermore, when replacing electrical circuit components (such as cir-

cuit boards and optical engine), bring the static-proof bag containing the new parts into

contact with a metallic section of the projector before taking out the component from the

static-proof bag.

2. USE OF GENUINE PARTS

•When replacing the structural components inside the projector (including the lamp assy),

use only replacement parts supplied by EPSON and listed in the projector's Parts List.

•Use the accessory power cord and interface cable provided with the projector.

3. SAFETY TESTING

The following tests should be carried out on repair parts used in the LCP.

Note: These are simplified tests that can be carried out at a repair centre that is not

equipped with full safety testing equipment.

Test items

1). Insulation resistance test

2). Ground continuity check

3). Illumination check

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Testing procedure

Carry out testing in the order given below.

Testing methods

1). Insulation resistance test

•Testing apparatus: Insulation ohmmeter (Rating: 500 V/100 MΩ)

•Insulation ohmmeter settings

Check Item Tool Standard

Insulation resistance check Insulation ohmmeter

Insulation resistance

should be 10 MΩor

more.

Repair EndInsulation resistance test Ground continuity check

Safety inspections

Illumination check

Projector AC inlet

PC connector

(1) (2)

1. Set the range selection switch to 500 V.

2. Connect the black lead wire to the ground terminal.

3. Connect the red lead wire to the line terminal.

4. Connect the black lead wire (crocodile clip) to c in

order to measure the insulation resistance (1) (between

a and c) in the diagram below.

5. Next, insert the probe of the red lead wire into a.

6. Set the measure switch to LOCK, and then measure the

insulation resistance after 1 minute.

7. Check that the insulation resistance after 1 minute is

10 MΩor more.

8. Next, measure the insulation resistance at (2) (between

b and c) in the diagram below in the same way as for

(1).

9. Check that the insulation resistance at (2) after 1 minute

is 10 MΩor more.

Ground terminal Line terminal

Display

Measure switch

Range selection

switch

!Caution

Because high voltage (500 V) is present,

do not touch the probe during testing.

Exposed metal part of projector

Power supply lines

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2). Ground continuity check

•Testing apparatus: Multimeter (with sensitivity down to 0.1 Ω)

•Multimeter settings

3). Illumination check

•Test conditions: Input a PC or video signal to the projector and check the illumina-

tion for about 5 minutes.

•Evaluation: Projector should operate normally with no smoke or fire.

Check Item Tool Standard

Ground continuity check Multimeter Should be no resistance

(0.5 Ωor less)

(1)

1. Turn on the power switch.

2. Set the range selection switch to Ω.

3. Connect the black lead wire to the COM terminal.

4. Connect the red lead wire to the V/Ω/Hz terminal.

5. Check that the resistance at (1) in the diagram below is

0.5 Ωor less.

Display

DC/AC, SW

Power supply lines

Exposed metal part of projector

Range selec-

tion switch

Terminals

V, Ω, HzCOM

Projector AC inlet

PC connector

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Other

•Check that the connectors at both ends of the power cord are not dirty or bent, and clean

them if they are dirty. Furthermore, if there is any noticeable discoloration on the power

cord, it should be replaced.

•When connecting the connector cables and interface cables inside the projector, make

sure that the cable connectors are pushed on as far as they will go.

•To prevent problems caused by dirt getting into the optical system, always disassemble

and assemble the projector in an area which is free from floating dust.

•When disconnecting the SW cable from the CN1503 of the MA board assembly, release

the connector locks. To release the connector lock, push up both ends of the connector

simultaneously with tweezers.

•When disconnecting the three FPC cables for the light valves from their connectors,

release the connector locks first.

Enlarged view of CN1503

Locked

Unlocked

CN1503

Locked Unlocked

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3. NECESSARY REQUIREMENTS FOR SERVICE TECHNICIANS

Service technicians who carry out repairs and servicing work on the EMP-TW1000 must

possess the following knowledge and abilities:

•The service technician must have read and fully understood the contents of the User's

Guide, especially projector operation.

•The service technician must have a fundamental knowledge of working with electricity,

including safety procedures, knowledge regarding electrical circuits, and knowledge

regarding static electricity.

4. Others

•Any questions regarding repairs and service to this projector (such as supply of parts and

the contents of this Service Manual) should be directed to EPSON at the address below.

Furthermore, information regarding matters such as technical changes to the projector

are released when necessary in the form of Technical Information bulletins, and these

should be referred to also.

SEIKO EPSON CORPORATION

ADDRESS 4897 OH-AZA, SIMAUCHI, MATSUMOTO-SHI,

NAGANO-KEN, 390-8640 JAPAN

TEL. 81-263-48-5437

FAX. 81-263-48-5680

SECTION VI.CS Quality Assurance Department

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