ViewSonic PJ755D - 2600 Lumens DLP Projector User manual

Model No. VS10412
XGA Portable DLP Projector
Service Manual
ViewSonic PJ755D-1
ViewSonic
381 Brea Canyon Road, Walnut, California 91789 USA - [phone]
(PJ755D-1_SM Rev. 1aNov. 2004)

Copyright
Copyright
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2004by ViewSonic Corporation. All rights reserved. No partof 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
11 12/1/04 Modified Chapter 6, Appendix B
1a 12/07/04 Initial Release Raquel D.
i
ViewSonic CorporationConfidential
-
Do Not-Copy PJ755D
ViewSonic Corporation Confidential - Do Not Copy PJ755D

ThismanualispreparedforthemaintenanceserviceforPJ755D0.7”XGADMDProjector.Main-
tenanceproceduresdescribedinthismanualareintendedtoisolatefaultypartsandreplacetheminthefield.
Italsoaimstoserveasaguideinprocuringreplacementpartsforthisproduct.
Thismanualiscopyrightedandallrightsarereserved.Thisproductmaynot,inwholeorinpart,be
copied,photocopied,translatedorreducedtoanyelectronicormachinereadableformwithoutpriorwritten
consentexceptforcopiesretainedbythepurchaserforbackuppurpose.
Thismanualincludessystemoverview,majorsystemassembly,components’description,andthe
“Troubleshooting”makingexplanationsonhowtodetecterrors.Italsoincludesaflowchartforcheckingor
correctingfaults.
No warranty or representation, either expressed or implied, is made with respect to this
documentation,itsquality,performance,merchantabilityorfitnessforparticularpurpose.
Noeventthatthevendorwillbeliablefordirect,indirect,special,incidentalorconsequentialdam-
agesarisingoutoftheuserorinabilitytousethisproductordocumentation.
Notice: Theinformationfoundinthismanualissubjecttochangewithoutpriornotice.Anysubsequent
changesmadetothedatahereinwillbeincorporatedinfurtheredition.
PJ755D Service Manual
Copyright November, 2004
All Rights Reserved
Manual Version 1.0
Document #896-G04-02A
Preface
PJ755Di

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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
FanGuiderModule 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

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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
Thismanualisappliedto0.7”XGADMDProjectorwithdigitalimagingfunctionalitybasedonDigital
MicromirrorDevice(DMD)technology.It’sthemodeofsinglepanel,250wattlonglifelamp.
Themanualgivesyouabriefdescriptionofbasictechnicalinformationtohelpinserviceandmaintaining
theproduct.
Yourcustomerswillappreciatethequickresponsetimewhenyouimmediatelyidentifyproblemsthatoccur
withourproducts.Weexpectyourcustomerswillappreciatetheservicethatyouofferthem.
Thismanualisfortechniciansandpeoplewhohaveanelectronicbackground.Sendtheproductbacktothe
distributorforrepairingand donotattempttodoanythingthatiscomplexorisnotmentionedinthe
troubleshooting.
- Onepanel0.7"DMDprojectionsystemwithtypical2250ANSIlumensandminimum
1910lumens
- 250WattUHPPhilipsLampdimmableto200W
- NoiseLevel,33dB(A)at23±2oo
oo
o
CC
CC
Cambienttemperature(Typical)
- Manualfocusprojectionzoomlens1.2X
- True1024x768resolution,16.7Mcolors
- Build-infullscreenNTSC/PAL/SECAM/HDTVvideocapabilitywithS-video/
Composite/Component
- VGA/SVGA/XGA/SXGA/SXGA+/UXGA/MAC/iMACcompatibility
- OSDwithfreezefunction
- Automaticallysaveadjustmentsforfutureuse
- Lamplifetimer
- Stereospeakerwith2Wattx2amplifier
- Adaptivevoltagecontrolfanspeed
- Noobviousvisiblecolorvariationonthewholedisplayimagein100%white,50%white
andpure R/G/Bcolor.

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1-2 Optical Specification
Technology -Single0.7”XGA DDRDMDchip
Resolution -1024x768
Brightness -1910ANSILumens(Minimum)
-2250ANSILumens(Typical)
Contrastratio -1200:1FullWhiteandBlack(Minimum)
-1800:1FullWhiteandBlack(Typical)
Uniformity -65%Japanstandard(Minimum)
-80%Japanstandard(Typical)
Lamptype -Philips 250 watt UHP lamp, dimmable to 200 watt
Lamplife -1500hoursmin,50%survivalrate(Normal Mode)
-2500hoursmin,50%survivalrate(EconoMode)
Projectionlens -f=28mm~33.6mm,F/2.4~2.6,1.2XManualZoomLens
Projectionscreensize -Adjustablefrom24.6”to246”(Diagonal)
Projectiondistance -Suggetedthrowdistance:1.2~10m(Mechanicaltravel)
DisplayPanel -TIDMD0.7”DDRXGADigitalMirrorDevice
PowerSupply -UniversalAC100–240VAC,50-60HzwithPFCinput
PowerConsumption -384WattTypicalat110VAC
-Standbymode<10W
VideoCompatibility 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 -2Watts@8Ohmx2speaker
-2Wattsx2amplifier
-SignalInput
Amplitude:1Vp-p
Impedance:10kOhm
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
Keystonecorrection +/ -16 degree
Temperature -Operating: 5-35°C
-Storage: -20~60°C
MaximumHumidity -Operating:10~85%(Max.),non-condensing
-Storage:5~90%(Max.),non-condensing
Noiselevel -33dB(A)(Typical,Under23+/-2OC;normalmode)
-30dB(A) (Typical,Under23+/-2OC;Economode)
Altitude -Operating 0~2,500ft,for5°C~35°C
2,500~5,000ft,for5°C~30°C
5,000~10,000ft,for5°C~25°C
-Storage 0~40,000ft
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: Turntheunittothebottomside.RemoveLampCoverandunscrewthreescrewstopull
outLampModule.
Step2: UnscrewtwoscrewstodetachElevatorFootfromBottomHousing.
Lift it up and then unscrew
the screw
LampModule
LampCover
ElevatorFoot

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2-2 Disassemble Top Cover and Keypad Board
Step1: Unscreweightscrewsandthenturntheunittothetopside.
Step2: DisconnecttwoconnectorstoremoveTopCover.
Top Cover

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Step3: Unscrewfourscrewstoremovethekeypadboard,keypadbutton,IRcoverandLEDlens.
Keypad Board
Keypad Button
LED Lens
IRCover

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2-3 Disassemble Main Board Module, Wind Tunnel
Module and Fan Guider Module
Step1: Unplugthirteenconnectorsandunscrewfourscrewsofthemainboard.
Main Board Module
Step2: UnscrewsixhexscrewsoftherearcovertoremoveMainBoard.

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Wind Tunnel Module
Fan Guider Module
Step3: Unscrewfivescrewstoremovethewindtunnelmoduleandfanguidermodule.
2-4 Disassemble Lamp Driver Module, LVPS Module
and Axial Fan 92x25 Module
Step1: Unscrew six screwsandunplugonewiretoremovethelampdrivermodule.
LampDriver Module

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Step2: Unscrew four screws.
Step3: PullupLVPSModule,unplugthewireandunscrewonescrewtodetachEMIGroundPlate
fromLVPSModule.
EMI Ground Plate
LVPS
Step4: UnscrewtwoscrewstoremoveAxialFan92x25Module.
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: UnscrewfivescrewstoremoveColorWheel.
Color Wheel and Photo Sensor Board
Step2: UnscrewonescrewtoreomoveColorWheelandPhotoSensorBoard.
Color Wheel
Photo Sensor Board
Step3: UnscrewsixscrewstoremoveEngineModulefromBottomHousing.

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Step4: Tearoffthemylar.
Step5: UnscrewfourscrewstoremovetheDMDheatsinkandtheheatsinkcover.
Step6: UnscrewfourscrewstoremoveBracketPlate,InsulationMylar,DMDBoardandDMDChip.
Step7: SeparateBlowerFan60x25ModulefromOpticalEngineModuleandthendetachBlowerFan
60x25fromtheSiliconRubber.
DMD Board
Bracket Plate
Insulation Mylar
DMDChip
Blower Fan 60x25
Silicon Rubber
Mylar

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2-6 Disassemble Rear Cover, Speaker, Blower Fan
50x20, Thermal Sensor Board, Interrupt Switch
Module and Bottom Cover
Step1: Unscrewtwoscrewsandloosenfourtenonstoremovetherearcover.
Step2: Unscrewfourscrewstoremovethespeakers.
Step3: UnscrewsixscrewstoremoveBlowerFan50x20,ElevatorShadingMylarandThermalSensorBoard.
Step4: UnscrewtwoscrewstoremoveInterruptSwitchModule.
Elevator Shading Mylar InterruptSwitch Module
Blower Fan 50x20
ThermalSensorBoard
Rear Cover