ViewSonic PJ755D - 2600 Lumens DLP Projector, PJ755D-1, VS10412 Service Manual

Model No. VS10412

XGA Portable DLP Projector

Service Manual

ViewSonic PJ755D-1

ViewSonic

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381 Brea Canyon Road, Walnut, California 91789 USA - [phone]

(PJ755D-1_SM Rev. 1a Nov. 2004)

Copyright

Copyright

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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

ViewSonic is a registered trademark of ViewSonic Corporation.
All other trademarks used within this document are the property of their respective owners.

Optiquest is a registered trademark of ViewSonic Corporation.

Revision History

DCN Number ECR Number

Documents Number

Description of Changes EditorRevision SM Editing Date

11/09/04

Initial Issue

ViewSonic Corporation Confidential - Do Not Copy PJ755D

This manual is prepared for the maintenance service for PJ755D 0.7” XGA DMD Projector. Main­tenance procedures described in this manual are intended to isolate faulty parts and replace them in the field.
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.

This manual includes system overview, major system assembly, components’ description, and the
“Troubleshooting” making explanations on how to detect errors. It also includes a flow chart for checking or
correcting faults.

No warranty or representation, either expressed or implied, is made with respect to this
documentation, its quality, performance, merchantability or fitness for particular purpose.

No event that the vendor will be liable for direct, indirect, special, incidental or consequential dam­ages 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

Preface

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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, L VPS 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
T est 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

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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

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Chapter 1

Introduction

1-1 Product Highlights

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.

- One panel 0.7" DMD projection system with typical 2250 ANSI lumens and minimum
1910 lumens

- 250 Watt UHP Philips Lamp dimmable to 200 W

- Noise Level, 33 dB(A) at 23±2

oo

oo

o

CC

CC

C ambient temperature (Typical)

- Manual focus projection zoom lens 1.2X

- True 1024 x 768 resolution, 16.7 M colors

- Build-in full screen NTSC/P AL/SECAM/HDTV video capability with S-video/
Composite/Component

- VGA/SVGA/XGA/SXGA/SXGA+/UXGA/MAC/i MAC compatibility

- OSD with freeze function

- Automatically save adjustments for future use

- Lamp life timer

- Stereo speaker with 2 Watt x 2 amplifier

- Adaptive voltage control fan speed

- No obvious visible color variation on the whole display image in 100% white, 50% white
and pure R/G/B color.

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1-2 Optical Specification

T echnology - Single 0.7” XGA DDR DMD chip

Resolution - 1024 x 768

Brightness - 1910 ANSI Lumens (Minimum)

- 2250 ANSI Lumens (Typical)

Contrast ratio - 1200 : 1 Full White and Black (Minimum)

- 1800 : 1 Full White and Black (Typical)

Uniformity - 65% Japan standard (Minimum)

- 80% Japan standard (Typical)

Lamp type - Philips 250 watt UHP lamp, dimmable to 200 watt

Lamp life - 1500 hours min, 50% survival rate (Normal Mode)

- 2500 hours min, 50% survival rate (Econo Mode)

Projection lens - f = 28 mm ~ 33.6 mm, F/2.4 ~ 2.6, 1.2X Manual Zoom Lens

Projection screen size - Adjustable from 24.6” to 246” (Diagonal)

Projection distance - Suggeted throw distance: 1.2~10m (Mechanical travel)

Display Panel - TI DMD 0.7” DDR XGA Digital Mirror Device

Power Supply - Universal AC 100 – 240 V AC, 50-60 Hz with PFC input

Power Consumption - 384 Watt T ypical at 110V AC

- Standby mode < 10W

Video Compatibility Standards :

- NTSC - M, 4.43 MHz / 3.58 MHz

- PAL - B, D, G, H, I , M , N, 60

- SECAM - B, D, G, K, K1, L

- HDTV - 1080i, 720p, 576i/p, 480i/p

1-3 Electrical specification

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Audio - 2 Watts @ 8 Ohm x2 speaker

- 2 Watts x2 amplifier

- Signal Input
Amplitude: 1 Vp-p
Impedance: 10 kOhm

1-4 Mechanical Specification

Dimension(WxHxD) - 330 x 100 x 269 mm

Weight - Approx. 7.9 lbs. ( 3.6 Kg)

Air Filter - None air filter

- Adaptive voltage control fan speed

Keystone correction +/ -16 degree

T emperature - Operating: 5 - 35°C

- Storage: -20~60°C

Maximum Humidity - Operating: 10 ~ 85% (Max.), non-condensing

- Storage: 5 ~ 90% (Max.),non-condensing

Noise level - 33 dB(A) ( Typical, Under 23+/-2OC; normal mode )

- 30 dB(A) (Typical, Under 23+/-2OC; Econo mode )

Altitude - Operating 0~2,500 ft, for 5°C~35°C

2,500~5,000 ft, for 5°C~30°C
5,000~10,000 ft, for 5°C~25°C

- Storage 0~40,000 ft

1-5 Environment

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1-6 Compatible Modes

Analog

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Digital

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Chapter 2

Disassembly Procedure

2-1 Disassemble Lamp Module and Elevator Foot

Step1: Turn the unit to the bottom side. Remove Lamp Cover and unscrew three screws to pull

out Lamp Module.

Step2: Unscrew two screws to detach Elevator Foot from Bottom Housing.

Lift it up and then unscrew

the screw

Lamp Module

Lamp Cover

Elevator Foot

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2-2 Disassemble Top Cover and Keypad Board

Step1: Unscrew eight screws and then turn the unit to the top side.
Step2: Disconnect two connectors to remove Top Cover.

Top Cover

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Step3: Unscrew four screws to remove the keypad board, keypad button, IR cover and LED lens.

Keypad Board

Keypad Button

LED Lens

IR Cover

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2-3 Disassemble Main Board Module, Wind Tunnel

Module and Fan Guider Module

Step1: Unplug thirteen connectors and unscrew four screws of the main board.

Main Board Module

Step2: Unscrew six hex screws of the rear cover to remove Main Board.

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Wind Tunnel Module

Fan Guider Module

Step3: Unscrew five screws to remove the wind tunnel module and fan guider module.

2-4 Disassemble Lamp Driver Module, LVPS Module

and Axial Fan 92x25 Module

Step1: Unscrew six screws and unplug one wire to remove the lamp driver module.

Lamp Driver Module

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Step2: Unscrew four screws.

Step3: Pull up LVPS Module, unplug the wire and unscrew one screw to detach EMI Ground Plate

from LVPS Module.

EMI Ground Plate

L VPS

Step4: Unscrew two screws to remove Axial Fan 92x25 Module.

Axial Fan 92x25 Module

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2-5 Disassemble Color Wheel , Photo Sensor Board,

Optical Engine Module and Blower Fan 60x25
Module

Step1: Unscrew five screws to remove Color Wheel.

Color Wheel and Photo Sensor Board

Step2: Unscrew one screw to reomove Color Wheel and Photo Sensor Board.

Color Wheel

Photo Sensor Board

Step3: Unscrew six screws to remove Engine Module from Bottom Housing.

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Step4: T ear off the mylar.

Step5: Unscrew four screws to remove the DMD heatsink and the heatsink cover.

Step6: Unscrew four screws to remove Bracket Plate, Insulation Mylar, DMD Board and DMD Chip.
Step7: Separate Blower Fan 60x25 Module from Optical Engine Module and then detach Blower Fan

60x25 from the Silicon Rubber.

DMD Board

Bracket Plate

Insulation Mylar

DMD Chip

Blower Fan 60x25

Silicon Rubber

Mylar