Epson EMP-7300 User manual

EPSON DATA PROJECTOR
XGA Data Projector
SERVICE MANUAL
EMP-7300
EPSON

INTRODUCTION
This Service Manual describes of the hardware information which is necessary for
the smooth field service of the XGA DATA PROJECTOR EMP-7300 and the trouble
shooting.
As the primary technologies will be supplied with the service bulletin, you may update
this manual.
HOW TO USE THE SERVICE MANUAL
Since the service manual describes the topics, which may be required in the field
maintenance, you may utilize this for repair or diagnosis of failures. The contents are
as following. Before you start the maintenance service, read every safety
precautions and observe safety precautions and observe safety rules.
Precautions : SAFETY, MAINTENANCE, and PERSON
Chapter 1: GENERAL (PART NAME, SYSTEM FUNCTION, SPECIFICATION, etc.)
Chapter 2: THEORY OF OPERATION (HARDWARE, INTERNAL CONNECTION,
and FUNCTION OF UNITS, etc.)
Chapter 3: DISASSEMBLE & ASSEMBLE (ASSEMBLY PROCESS FOR MAIN
FRAME)
Chapter 4: TROUBLE SHOOTING
Appendix: PARTS LIST, EXPLODED DIAGRAM, CIRCUIT DIAGRAM,
HARDWARE COMPARISON TABLE, etc.
VCCI RADIO FREQUENCY INTERFERENCE SELF RESTRICTION
This product is the type 1 information equipment and uses radio frequency energy
and fully complies with the limits for the specifications in the computer information
equipment radio interference regulation (VCCI rules). If not installed and used
properly manufacturer's instructions, may cause interference to radio and television
reception.
TRADEMARK
IBM and DOS/V are the trademark or the registered trademark of International
Business Machines Corporation.
Macintosh and Power Book are the registered trademarks of Apple Computer Inc.
Windows is the trademark of Microsoft Corporation.
EPSON is the trademark of SEIKO EPSON CORPORATION.
NOTICES
1. This document should not be reproduced in whole or in part without the written permission of SEIKO
EPSON CORPORATION.
2. Any of description in this document is the subject to change without notice in future.
3. The information and specification in this document are the most up-to-date at the time of publication.
However, we are unable to guarantee the accuracy of printed material after the date of publication. In
case of any mistake or lack of description, please kindly notify us to correct.
4. Any influence by utilizing the document may be out of our responsibility regardless the item 3 above.
© 1998 SEIKO EPSON CORPORATION

Record of Revisions
History Issued Date Alternation
REVA 1998,February.13 Preliminary Issued
Memo Random
Free area to memorize any important technical information here.

PRECAUTIONS
1. MAINTAIN THE SAFETY OF OPERATORS
(1) PROTECTION FROM ELECTRIC SHOCK
* Whenever doing any repair work on the product, be sure to turn off the power
switch and remove the electric power cable from the electrical outlet.
* Whenever inevitably turning the power on to the product opening the case or cover
(repair process) be sure to take off any metallic materials such as a watch, cuffs,
rings, and tie pins which may touch the metallic part of the product and dangerous
of electric shock.
(2) PROTECTION FROM ACCIDENTAL INJURY
* Be sure not to touch the lamp inner housing and its circumstances after the power
is turned off, they may be heated up even after the cooling down process was
ended. Also make sure not to touch the light source and its circumstances during
the operation of repair as turning the power on.
* Make sure to protect your hands by gloves from sharp edges during assembly and
disassembly.
* Do not look into the light source or lens while the light is on. Protect eyes from
being damaged.
(3) PROTECTION FROM ACCIDENTS
* Any operation should be done while the device placed on a flat and stable place to
prevent the device or parts from being dropped. Be careful not to place tools and
parts on the device or at your feet.
* Whenever doing any repair work on the product, be sure to away from a place for
foreigner come across in order to prevent the product from being used in
incomplete condition or accidental near miss. Be sure not to leave the product
during any repair work.
* Be sure to use attached power cable when you supply the power to the product.
2. SAFETY MAINTENANCE
(1) ELECTROSTATIC DISCHARGE
* Whenever doing any repair work on the product, be sure to wear the wristband and
the electrostatic mat with grounding. When replacing any electric components
(Boards and Optical engine), it is recommended to touch the electrostatic plastic
bag of the component to the metallic part of the product once before take the
component out from the plastic bag.

(2) LIMITATION OF PARTS
* Use only authorized or supplied parts from EPSON for the replacement of
mechanical parts including the lamp inner housing, fuse, air filter and so on.
* Use only the power cable and the interface cables attached with the product.
(3) Others
* Visually checks the distortion or dirt at the connectors of the power cable. If dirty,
clean off, and if distorted, replace the cable in order to avoid firing by the flush over
phenomenon.
* When plug the internal connector cables or the interface cables, be sure to fully plug
into the connectors until it stack to the connector edge.
* When remove the FPC cable of the light valve are sure to remove the connector lock
in advance. The connector lock should be unlocked by pulling up the both end of
connector lock simultaneously with tweezers.
* Whenever doing removal of parts or repair work on the product, make sure that the
work is done in a clean room, free of dust and dirt in order to keep the optical
element away from dirt.
3. REQUIREMENT FOR THE MAINTENANCE PERSON
Authorized person should have the following knowledge and skill for the maintenance
of EMP-7300.
* Need to be trained by EPSON authorized maintenance training program and to be
authorized as a service engineer.
* Need to sufficiently understand the operation and the descriptions of this service
manual.
* Need to have the basic knowledge of electricity (safety operation, circuit diagram,
electrostatic, and else...)
4. OTHERS
* Any questions on the RS-361/RS-376 maintenance including supply of the service
parts or contents of the document would like to be contacted to the below address.
Any technical information about amendments is occasionally available as the service
bulletin.
SEIKO EPSON CORPORATION
4897 OH-AZA SHIMAUCHI,
MATSUMOTO-SHI, NAGANO-KEN 390 JAPAN
TEL: [phone]
FAX: [phone]
ATTN: Visual Device Customer Support Group

Contents
Chapter 1
Product general
1.1 PRODUCT GENERAL................................................................................ 1-1
1.2 PART NAME............................................................................................... 1-2
1.2.1 Outside View of Main Frame............................................................. 1-2
1.2.2 Inside View of Main Frame................................................................ 1-3
1.2.3 Outside View of Remote Controller ................................................... 1-7
1.3 CONNECTION............................................................................................ 1-8
1.3.1 Connecting to a PC........................................................................... 1-8
1.3.2 Connecting to a Macintosh................................................................ 1-9
1.3.3 Connecting to a Video source ......................................................... 1-10
1.3.4 Connecting to an Audio source ....................................................... 1-10
1.4 MAIN COMPORNENT.............................................................................. 1-11
1.5 SPECIFICATIONS.................................................................................... 1-15
1.6 INTERFACE SPECIFICATION ................................................................. 1-17
1.6.1 Computer 1/2.................................................................................. 1-17
1.6.2 Audio 1/2......................................................................................... 1-18
1.6.3 Audio Out........................................................................................ 1-18
1.6.4 S-Video........................................................................................... 1-18
1.6.5 Video............................................................................................... 1-19
1.6.6 Audio L/R........................................................................................ 1-19
1.6.7 Mouse / Com 1/2............................................................................. 1-19
1.6.8 Receptor ......................................................................................... 1-20
1.6.9 RGB Video Input (EHQ option I/F)................................................... 1-20
Chapter 2
Theory of operation
2.1 HARDWARE............................................................................................... 2-1
2.1.1 Electrical System Connections.......................................................... 2-2
2.1.2 Optical System Connections (Optical Engine)................................... 2-3
2.2 POWER SUPPLY UNIT.............................................................................. 2-5
2.3 CD10MA BOARD ....................................................................................... 2-8
2.4 CD10DR BOARD...................................................................................... 2-11
2.5 SWITCH PANEL....................................................................................... 2-14
2.6 CD10AU BOARD...................................................................................... 2-15
2.7 CD10MJ BOARD...................................................................................... 2-17
2.8 CD10AJ BOARD....................................................................................... 2-19
2.9 CD10VJ BOARD....................................................................................... 2-20
2.10 CD10PJ BOARD..................................................................................... 2-21
2.11 CD10RC BOARD (RECEPTOR BOARD) ............................................... 2-22
2.12 SPEAKER UNIT...................................................................................... 2-24
2.13 LIGHT GUIDE UNIT................................................................................ 2-25
2.14 LAMP INNER HOUSING ........................................................................ 2-27
2.15 SENSOR / SWITCH................................................................................ 2-30

2.15.1 Interlock Switch............................................................................. 2-31
2.15.2 Safety Switch................................................................................ 2-32
2.15.3 Lamp House Thermistor................................................................ 2-33
2.15.4 LV Thermistor ............................................................................... 2-34
2.15.5 Front Temperature Thermistor ...................................................... 2-35
Chapter 3
Disassembly and assembly
3.1 DISASSEMBLY AND ASSEMBLY PROCEDURES.................................... 3-1
3.2 DISASSEMBLING THE MAIN UNIT............................................................ 3-5
3.2.1 Removing the Lamp Inner Housing................................................... 3-6
3.2.2 Removing the Air Filter Frame Unit ................................................... 3-7
3.2.3 Removing the Upper Case Unit And Handle ..................................... 3-8
3.2.4 Removing the Switch Panel ............................................................ 3-10
3.2.5 Removing the Speaker Units Right / Left......................................... 3-11
3.2.6 Removing the CD10AU Board......................................................... 3-12
3.2.7 Removing the Receptor Board Assembly (FI Board / RI Board)...... 3-13
3.2.8 Removing the CD10MA Board........................................................ 3-14
3.2.9 Removing the Rear Case Unit Assembly ........................................ 3-16
3.2.10 Removing the CD10AJ/CD10MJ/CD10PJ/CD10VJ Board ............ 3-17
3.2.11. Removing the Lamp Thermistor ................................................... 3-19
3.2.12. Removing the Prism Duct / LV Thermistor.................................... 3-20
3.2.13. Removing the Safety Switch......................................................... 3-21
3.2.14. Removing the Optical Engine....................................................... 3-22
3.2.15. Removing the Power Supply Unit / PBS Thermistor..................... 3-23
3.2.16. Removing the Foot Adjuster A/B .................................................. 3-25
3.2.17. Removing the CD10DR Board Assembly..................................... 3-26
3.2.18. Removing the FC Board............................................................... 3-27
3.2.19. Removing the Projection Lens Unit (PLU).................................... 3-28
3.2.20. Removing the Cooling Fan / Optical Head Unit / Light Guide
Unit/Exhaust fan....................................................................................... 3-29
Chapter 4
Troubleshooting
4.1. Before Starting Troubleshooting Procedures.............................................. 4-1
4.1.1. Tools and Accessories Required for Troubleshooting ...................... 4-1
4.1.2. Field Replacement Parts.................................................................. 4-1
4.2. Entry.......................................................................................................... 4-2
Appendix
Parts table
Circuit diagram
Exploded diagram
Hardware comparison table

Chapter 1
Product general

1-1
REV.A
1.1 PRODUCT GENERAL
EMP-7300 XGA DATA PROJECTOR designed as the full compatible XGA projector is
the maximum luminance device be used the new UHE lamp and the micro lens array
with XGA resolution to project enhanced color images from the two personal
computers CRT and any one of video equipment such as video tape deck, video
camcorders or digital camera.
FEATURE OF EMP-7300
* Portable light weight, compact size
The new type of power unit and circuit board and the simple structure enables to
minimize the body in A4 file size with the weight of 6.7kg. An optional carrying case
will be useful in transporting.
* Bright and clear image
The micro lens array,the new type of UHE-120W lamp (950lm.ANSI) and the optical
block enable to achieve a wide projection image from 30" to 300" (projection distance :
1.2 to 12 m). An optional high brightness screen will supply the high brightness even in
the light ambient.
* High resolution full color (16770 thousands colors)
3 (R, G, and B) of TN liquid crystal panels of 786,432 pixel will supply XGA resolution
of 1024 x768 dots.
* Standard attachment of remote controller
The projector can be controlled using a handheld remote control unit, with menus
being provided for Image source switching and Image adjustment. The remote control
can also be used as a wireless mouse to control mouse operations on the computer
screen during presentations. The ELP LINK IITM software that comes with the projector
provides a number of add-on features that are designed to make presentations more
effective.
* Connectivity with various computers
The advanced data signal determination function enablesEMP-7300 to connect with
various computers such as IBM-compatible PCs and laptops, Macintosh. It also
determines video signal of NTSC, PAL or SECAM in composite video, S-Video format.
* Advanced Image Real-time Resizer
The projector also features a new patented AIrRTM (Advanced Image Real-time
Resizer) chip for supporting of miscellaneous computer output, as well as full XGA
output. No matter what type of output is used, the result is full-size video image of
outstanding clarity.
* Simple Maintenance
The maintenance easy. Number of image adjustment process is not required.
* Theft - proof
Kensington lock is available with hole on the lower case.

1-2REV.A
1.2 PART NAME
1.2.1 Outside View of Main Frame
Figure1- 1
Lamp indicator
Temperature indicator
Speaker
Handle
Foot lever
Remote controller
signal receptor
Theft-proof
Focus ring
Zoom ring
Front foot
Operator panel
Resize button
Source button
Menu button
Operation indicator
Sync button
Power button
Blank button
Tracking button
Enter button
Volume button
Menu button
Operator panel

1-3
REV.A
Figure1- 2Bottom side view
1.2.2 Inside View of Main Frame
Figure1- 3Inside view of main frame
Power supply unit
Main board
Front foot
Lamp cover
Rear foot
Air filter cover

1-4REV.A
Figure1- 4side view
Figure1- 5Under the main board view
Driver board
Light guide unit
Exhaust fan
LV Thermister Prism duct Driver board
Inlet unit

1-5
REV.A
Figure1- 6Inside of rear case unit
Figure1- 7Under the driver board view
CD10AJ board
CD10VJ board
CD10RJ boardCD10MJ board
Foot adjuster A
Light guide unit
Safety switch
Lamp Thermister Lamp power cable

1-6REV.A
Figure1- 8Lower case view (Under the light guide block)
Inlet unit
Filter cover switch CN board
Filter board Air filter frame

1-7
REV.A
1.2.3 Outside View of Remote Controller
Remote controller
Figure1- 11 Remote controller
Menu button
Effect button
Right click button
Custom button
Mute button
Volume button
Source button
Effect button
Pointer button
Blank button
Resize button
Freeze button
Power button
Front view
Rear view
Remote infrared Ray
Left click button
Battery cover

1-8REV.A
1.3 CONNECTION
1.3.1 Connecting to a PC
Figure1- 13
Computer cable (Attached Accessory )
Computer 1

1-9
REV.A
Switch A
Switch B
MAC Adapter
1.3.2 Connecting to a Macintosh
Figure1- 14
* Attached accessories
•¦Dip switch settings are required according to the machine type.
Refer to the following table for detail. (Default setting is MAC13 mode.)
Table1- 1MAC Adapter Dip Switch settings
Mode Switch A
“ON” switch B “ON”
VGA 640x480 3,4,5 8
13”640x480 1,2,5 8
16”832x624 2,4,5 8
19”1024x768 2,3,5 8
21”1152x870 1,2,3,4,5 8
13”Multi Res. 1,2,5 8
14”Multi Res. 1,2,5 3,4,8
17”Multi Res. 1,2,5 3,8/4,8
21”Multi Res. 1,2,5 3,8
Figure1- 15 Monitor adapter
Computer 1
Computer cable (Standard accessory)
Mac. Desk top adapter
(Attached accessory)

1-10 REV.A
1.3.3 Connecting to a Video source
Figure1- 17 Connection for video source
1.3.4 Connecting to an Audio source
Figure1- 18 Connection for audio source
A/V cable (Attached accessory)
Video Audio L Audio R
Audio out
External audio devices
Audio cable (Consumable)

1-11
REV.A
1.4 MAIN COMPORNENT
CD10MA board
Figure1- 20 CD10MA board
CD10DR board
Figure1- 22 CD10DR board
CD10AU board
Figure1- 23 CD10AU board

1-12 REV.A
CD10MJ board
Figure1- 26 CD10MJ board
CD10AJ board
Figure1- 27 CD10AJ board
CD10PJ board
Figure1- 28 CD10PJ board
CD10VJ board
Figure1- 29 CD10VJ board