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Service Manual
ViewSonic PJ755D-1
Model No. VS10412
XGA Portable DLP Projector
(PJ755D-1_SM Rev. 1a Nov. 2004)
ViewSonic 381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583
Copyright
Copyright 2004 by ViewSonic Corporation. All rights reserved. No part of this publication may be
reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical,
manual or otherwise, without the prior written permission of ViewSonic Corporation.
Disclaimer
ViewSonic makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranty of merchantability or fitness for any particular
purpose. Further, ViewSonic reserves the right to revise this publication and to make changes from time
to time in the contents hereof without obligation of ViewSonic to notify any person of such revision or
changes.
Trademarks
Optiquest is a registered trademark of ViewSonic Corporation.
ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.
Revision History
Documents Number
Revision SM Editing Date Description of Changes Editor
DCN Number ECR Number
11/09/04 Initial Issue
1 12/1/04 Modified Chapter 6, Appendix B
1a 12/07/04 Initial Release Raquel D.
ViewSonic Corporation Confidential - Do Not Copy PJ755D
Preface
This manual is prepared for the maintenance service for PJ755D 0.7" XGA DMD Projector. Main-
tenanceproceduresdescribedinthismanualareintendedtoisolatefaultypartsandreplacetheminthefield.
It also aims to serve as a guide in procuring replacement parts for this product.
This manual is copyrighted and all rights are reserved. This product may not, in whole or in part, be
copied, photocopied, translated or reduced to any electronic or machine readable form without prior written
consent except for copies retained by the purchaser for backup purpose.
Thismanualincludessystemoverview,majorsystemassembly,components'description,andthe
"Troubleshooting" making explanations on how to detect errors. It also includes a flow chart for checking or
correctingfaults.
No warranty or representation, either expressed or implied, is made with respect to this
documentation,itsquality,performance,merchantabilityorfitnessforparticularpurpose.
No event that the vendor will be liable for direct, indirect, special, incidental or consequential dam-
ages arising out of the user or inability to use this product or documentation.
Notice:
The information found in this manual is subject to change without prior notice. Any subsequent
changes made to the data herein will be incorporated in further edition.
PJ755D Service Manual
Copyright November, 2004
All Rights Reserved
Manual Version 1.0
Document #896-G04-02A
i PJ755D
Table of Contents
Chapter 1 Introduction 1-1
Product Highlight 1-1
Optical Specification 1-2
Electrical Specification 1-2
Mechanical Specification 1-3
Environment 1-3
Compatible Modes 1-4
Chapter 2 Disassembly of Procedure 2-1
Disassemble Lamp Module and Elevator Foot 2-1
Disassemble Top Cover and Keypad Board 2-2
Disassemble Main Board Module, Wind Tunnel Module and
Fan Guider Module 2-4
Disassemble Lamp Driver Module, LVPS Module and Axial Fan
92*25 Module 2-5
Disassemble Color Wheel, Photo Sensor Board, Optical Engine
Module and Blower Fan 60*25 Module 2-7
Disassemble Rear Cover, Speaker, Blower Fan 50*20, Thermal
Sensor Board, Interrupt Switch Module and Bottom Cover 2-9
Chapter 3 Troubleshooting 3-1
Equipment Needed 3-1
Main Procedure 3-2
Chapter 4 Function Test and Alignment Procedure 4-1
Product 4-1
Test Equipment 4-1
Test Condition 4-1
Test Display Modes and Pattern 4-2
Inspection Procedure 4-8
Chapter 5 Firmware Upgrade Procedure 5-1
Equipment Needed 5-1
Hardware Setup Procedure 5-1
Firmware Program Installation Procedure 5-2
ii PJ755D
Chapter 6 DDC Key-in Procedure 6-1
Equipment Needed 6-1
Setup Procedure 6-2
EDID Upgrade Procedure 6-4
Appendix A 7-1
Exploded Overview 7-1
Appendix B 7-12
Serial Number System Definition 7-12
Reader's Response 7-13
iii PJ755D
Chapter 1
Introduction
This manual is applied to 0.7" XGA DMD Projector with digital imaging functionality based on Digital
Micromirror Device (DMD) technology. It's the mode of single panel, 250 watt long life lamp.
The manual gives you a brief description of basic technical information to help in service and main taining
the product.
Your customers will appreciate the quick response time when you immediately identify problems that occur
with our products. We expect your customers will appreciate the service that you offer them.
This manual is for technicians and people who have an electronic background. Send the product back to the
distributor for repairing and do not attempt to do anything that is complex or is not mentioned in the
troubleshooting.
1-1 Product Highlights
- One panel 0.7" DMD projection system with typical 2250 ANSI lumens and minimum
1910lumens
- 250 Watt UHP Philips Lamp dimmable to 200 W
- Noise Level, 33 dB(A) at 23