Viewsonic PJ755D-1 Service Manual 1a

Service Manual

ViewSonic PJ755D-1

Model No. VS10412

XGA Portable DLP Projector

ViewSonic

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

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381 Brea Canyon Road, Walnut, California 91789 USA - (800) 888-8583

ViewSonic Corporation Confidential - Do Not Copy PJ755D

Copyright 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.

11/09/04

Revision History

Documents Number

DCN Number ECR Number

Description of Changes EditorRevision SM Editing Date

Initial Issue

Preface

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

Manual Version 1.0

Document #896-G04-02A

PJ755Di

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

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 1910 lumens

- 250 Watt UHP Philips Lamp dimmable to 200 W

- Noise Level, 33 dB(A) at 23±2

- 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.

C ambient temperature (Typical)

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1-1 PJ755D

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)

1-3 Electrical specification

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 1 10V 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

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1-2 PJ755D

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

1-5 Environment

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

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1-3 PJ755D

1-6 Compatible Modes

Analog

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1-4 PJ755D

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1-5 PJ755D

Digital

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1-6 PJ755D

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.

Lamp Module

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

Lamp Cover

Lift it up and then unscrew

the screw

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Elevator Foot

PJ755D2-1

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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PJ755D2-2

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

Keypad Button

Keypad Board

IR Cover

LED Lens

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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.

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

Main Board Module

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PJ755D2-4

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

Fan Guider Module

Wind Tunnel 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.

L VPS

EMI Ground Plate

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

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Axial Fan 92x25 Module

PJ755D2-6

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

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

Photo Sensor Board

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Step4: T ear off the mylar.

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

DMD Chip

Insulation Mylar

Bracket Plate

Blower Fan 60x25

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Silicon Rubber

PJ755D2-8

+ 42 hidden pages