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ViewSonic VSXXXXX service manual Key Board 9.3 USB Board

Models: VSXXXXX

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9.3 Key Board

9.3 Key Board

9.3 USB Board

48

Image 48

ViewSonic VSXXXXX service manual Key Board 9.3 USB Board

Contents

Model No. VSXXXXX 23.6” Color TFT LCD Display Service ManualViewSonic VG2427wm VG2427wmSM Rev. 1a MarRevision History CopyrightDisclaimer TrademarksTABLE OF CONTENTS 1. Precautions and Safety Notices 1. Precautions and Safety Notices1.4 Handing and Placing Methods Correct MethodsIncorrect Methods Place the monitor on a clean and soft foam pad Place the monitor on the lap, the panel surface must be upwardsThe 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 displayAudio Adjust Main Menu ControlsControl Explanation Manual Image Adjust displays the Manual Image Adjust menu Page 4. Circuit Description 4.1 Main BoardPin Assignment Page Page Page Page Pin Descriptions NamePin # Function4.2 Power Board IC901 LD7576Typical Application Block Diagram 1 CT 2 COMP 3 CS 4 GND 5 OUT 6 VCC 7 NC 8 HVFunction Pin Diagram Functional Block DiagramIC801 TA9687GN Pin Description Pin NoI/O1 Names5. Adjustment Procedure 5.1 White balance, Luminance adjustmentEnter into Burn/in mode Enter into the factory mode5.2 Firmware Upgrade Procedure ISP BoardMax Brightness measurement 250 cd/m2 Test conditions 5.2.1 Equipment neededHardware Connect status 5.2.2 Update the NOVATEK’S firmware LPT CableVGA Cable You should jump the pin to “For Flash” at ISP Board Connect to theDouble click “Writer.exe” Page 5.3 DDC Key in Procedure 5.3.2 Install software5.3.3 Connect the DDC board as follow 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. Schematic Diagrams 8.1 Main Board20081225 FB402 Volume# TO252SOT223 ADD R7110402 NT68667UFG/CADD R446,447 20K OHM 1/16W8.2 Power Board JUMP WIREbom change 2008-08-20POWER XFMR7 100K 1/10W 1%R813 100K 1/10W 5%VOLUME IC with Heat-sink90G6295-34 Lin 2 RinKEY1 POWER POWER3 POWER 4 BLUE 5 YELLOW KEY2 DOWNHub side 12V toUpstream 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 EPLDescription Part NumberBEZEL 10.2 PPL DescriptionPart Number 11. Recommended Spare Parts List TDRMNDDKWBVSPCLocation Part NumberA34G0936 KR 3B0100 REAR COVERA85G0133101 SHIELD-ACR105 061G0402101RST CHIPR 100 OHM +-5% 1/16W R109R401 061G0402470 0FRST CHIPR 0402 470 OHM +-1% 1/16W R110C302 065G0402224CAP CER 0.22UF -20%-80% C401DOME SWITCH 5PCS POWER BOARDZD401 093GCN801 033G8021 2EWAFER IC9030M1G 8120SCREW Q90G6263R840 061G0603105RST CHIPR 1M OHM +-5% 1/10W R841R935 061G1206101RST CHIPR OHM +-5% 1/4WPOWER BOARD PCB JUMPER WIREC929 065G1206102CONNECTOR Q37G0139013VSC 23.6 HINGE ASSY Q40G 58170931AR718 061G0402104RST CHIPR 100 KOHM +-5% 1/16W R71912. Different Parts List Diversity of TDRMNDDYWBVSPC compared with TDRMNDDKWBVSPCLocation Part NumberAssessment Reader’s basic dadaReader’s Response