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ViewSonic VSXXXXX service manual Power Board

Models: VSXXXXX

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9.2 Power Board

9.2 Power Board

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ViewSonic VSXXXXX service manual Power Board

Contents

ViewSonic VG2427wm Model No. VSXXXXX 23.6” Color TFT LCD DisplayService Manual VG2427wmSM Rev. 1a MarDisclaimer Revision HistoryCopyright 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 Do the following to adjust the display setting The following tips may help you optimize your displayMain Menu Controls Audio AdjustControl Explanation Manual Image Adjust displays the Manual Image Adjust menu Page 4. Circuit Description 4.1 Main BoardPin Assignment Page Page Page Page Pin # Pin DescriptionsName 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 I/O1 Pin DescriptionPin No NamesEnter into Burn/in mode 5. Adjustment Procedure5.1 White balance, Luminance adjustment Enter into the factory modeMax Brightness measurement 250 cd/m2 Test conditions 5.2 Firmware Upgrade ProcedureISP Board 5.2.1 Equipment neededVGA Cable Hardware Connect status 5.2.2 Update the NOVATEK’S firmwareLPT Cable You should jump the pin to “For Flash” at ISP Board Connect to theDouble click “Writer.exe” Page 5.3.3 Connect the DDC board as follow 5.3 DDC Key in Procedure5.3.2 Install software Connect to the PC LPTFor analog a. Double-click ，appear as follow Figs： b. ClickR3V080100001 12 codes, for example d. Unit appears the following Fig, writer completed6. Troubleshooting Flow Chart 7. Block Diagram 7.1 Main Board7.2 Power Board 8.1 Main Board 8. Schematic Diagrams20081225 FB402 SOT223 Volume#TO252 ADD R711ADD R446,447 0402NT68667UFG/C 20K OHM 1/16Wbom change 8.2 Power BoardJUMP WIRE 2008-08-20R813 POWER XFMR7100K 1/10W 1% 100K 1/10W 5%4 Lin VOLUMEIC with Heat-sink90G6295-3 2 Rin3 POWER 4 BLUE 5 YELLOW KEY1 POWERPOWER KEY2 DOWNUpstream Hub side12V to Dow nstream9. PCB Layout Diagrams 9.1 Main BoardPage 9.2 Power Board Page 9.3 Key Board 9.3 USB Board Page 10. Exploded Diagram and Exploded Parts List 10.1 EPLPart Number DescriptionBEZEL Description 10.2 PPLPart Number Location 11. Recommended Spare Parts ListTDRMNDDKWBVSPC Part NumberA85G0133101 A34G0936 KR 3B0100REAR COVER SHIELD-ACRST CHIPR 100 OHM +-5% 1/16W R105061G0402101 R109RST CHIPR 0402 470 OHM +-1% 1/16W R401061G0402470 0F R110CAP CER 0.22UF -20%-80% C302065G0402224 C401ZD401 DOME SWITCH 5PCSPOWER BOARD 093GWAFER CN801033G8021 2E IC903SCREW 0M1G8120 Q90G6263RST CHIPR 1M OHM +-5% 1/10W R840061G0603105 R841RST CHIPR R935061G1206101 OHM +-5% 1/4WC929 POWER BOARD PCBJUMPER WIRE 065G1206102VSC 23.6 HINGE ASSY CONNECTORQ37G0139013 Q40G 58170931ARST CHIPR 100 KOHM +-5% 1/16W R718061G0402104 R719Location 12. Different Parts ListDiversity of TDRMNDDYWBVSPC compared with TDRMNDDKWBVSPC Part NumberReader’s basic dada AssessmentReader’s Response