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ViewSonic VSXXXXX service manual

Models: VSXXXXX

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ViewSonic VSXXXXX service manual

Contents

Service Manual Model No. VSXXXXX 23.6” Color TFT LCD DisplayViewSonic VG2427wm VG2427wmSM Rev. 1a MarCopyright Revision HistoryDisclaimer TrademarksTABLE OF CONTENTS 1. Precautions and Safety Notices 1. Precautions and Safety NoticesCorrect Methods 1.4 Handing and Placing MethodsIncorrect Methods Place the monitor on the lap, the panel surface must be upwards Place the monitor on a clean and soft foam padThe panel is placed facedown on the lap. That may cause “Mura.” 2. Specification 3. Front Panel Function Control Description The following tips may help you optimize your display Do the following to adjust the display settingMain Menu Controls Audio AdjustControl Explanation Manual Image Adjust displays the Manual Image Adjust menu Page 4.1 Main Board 4. Circuit DescriptionPin Assignment Page Page Page Page Name Pin DescriptionsPin # FunctionIC901 LD7576 4.2 Power BoardTypical Application 1 CT 2 COMP 3 CS 4 GND 5 OUT 6 VCC 7 NC 8 HV Block DiagramFunction Functional Block Diagram Pin DiagramIC801 TA9687GN Pin No Pin DescriptionI/O1 Names5.1 White balance, Luminance adjustment 5. Adjustment ProcedureEnter into Burn/in mode Enter into the factory modeISP Board 5.2 Firmware Upgrade ProcedureMax Brightness measurement 250 cd/m2 Test conditions 5.2.1 Equipment neededLPT Cable Hardware Connect status 5.2.2 Update the NOVATEK’S firmwareVGA Cable You should jump the pin to “For Flash” at ISP Board Connect to theDouble click “Writer.exe” Page 5.3.2 Install software 5.3 DDC Key in Procedure5.3.3 Connect the DDC board as follow Connect to the PC LPTa. Double-click ，appear as follow Figs： b. Click For analogd. Unit appears the following Fig, writer completed R3V080100001 12 codes, for example6. Troubleshooting Flow Chart 7.1 Main Board 7. Block Diagram7.2 Power Board 8.1 Main Board 8. Schematic Diagrams20081225 FB402 TO252 Volume#SOT223 ADD R711NT68667UFG/C 0402ADD R446,447 20K OHM 1/16WJUMP WIRE 8.2 Power Boardbom change 2008-08-20100K 1/10W 1% POWER XFMR7R813 100K 1/10W 5%IC with Heat-sink90G6295-3 VOLUME4 Lin 2 RinPOWER KEY1 POWER3 POWER 4 BLUE 5 YELLOW KEY2 DOWN12V to Hub sideUpstream Dow nstream9.1 Main Board 9. PCB Layout DiagramsPage 9.2 Power Board Page 9.3 Key Board 9.3 USB Board Page 10.1 EPL 10. Exploded Diagram and Exploded Parts ListPart Number DescriptionBEZEL Description 10.2 PPLPart Number TDRMNDDKWBVSPC 11. Recommended Spare Parts ListLocation Part NumberREAR COVER A34G0936 KR 3B0100A85G0133101 SHIELD-AC061G0402101 R105RST CHIPR 100 OHM +-5% 1/16W R109061G0402470 0F R401RST CHIPR 0402 470 OHM +-1% 1/16W R110065G0402224 C302CAP CER 0.22UF -20%-80% C401POWER BOARD DOME SWITCH 5PCSZD401 093G033G8021 2E CN801WAFER IC9038120 0M1GSCREW Q90G6263061G0603105 R840RST CHIPR 1M OHM +-5% 1/10W R841061G1206101 R935RST CHIPR OHM +-5% 1/4WJUMPER WIRE POWER BOARD PCBC929 065G1206102Q37G0139013 CONNECTORVSC 23.6 HINGE ASSY Q40G 58170931A061G0402104 R718RST CHIPR 100 KOHM +-5% 1/16W R719Diversity of TDRMNDDYWBVSPC compared with TDRMNDDKWBVSPC 12. Different Parts ListLocation Part NumberReader’s basic dada AssessmentReader’s Response