Sierra Wireless 800TFT specifications Troubleshooting, No Power

Page 15

5 Troubleshooting

Notes: 1. Before troubleshooting, set up the PC’s display as below.

•Resolution: 1280 x 1024

•H-frequency: 64 kHz

•V-frequency: 60 Hz

2.If no picture appears, confirm the power cord is correctly connected.

3.Check the following circuits.

•No raster appears: Stand PCB, Main PCB

•12V develop but no screen: Main PCB

•12V does not develop: Main PCB

4.If you push and hold the EXIT button for more than 5 seconds, the monitor automatically reverts back to the factory preset

5-1 No Power

Does proper DC 12 V appear at DC jack connected to CN101?

Yes

Does proper DC 5 V appear at

Pin 4 of IC101?

Yes

Does proper 5 V - signal appear at Pin 42 of IC501 (SW_REG_EN)?

Yes

Check Q103, Q105 and Q106.

No

No

No

Check Power Adaptor.

Check IC101 and related circuit.

Check IC501 and related circuit.

(CN102, Function Key)

SyncMaster 800TFT

5-1

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Contents Color Monitor Safety Precautions PrecautionsElectrostatically Sensitive Devices ESD Precautions Servicing PrecautionsSpecifications Product SpecificationsType Pin No 13W3 Separate Composite Pin AssignmentsIBM Vesa Timing ChartMemo Disassembly and Reassembly DisassemblyReassembly Disassembly and Reassembly Alignments and Adjustments Using the DDC Control JIGRequired Equipment Main Menu Sub Menu Adjustment Procedures Service Function Menu Screen Using the OSD Service functionAlignments and Adjustments SyncMaster 800TFT No Power TroubleshootingAD-SDA, AD-SCL No VideoWaveforms Waveforms No OSDExploded View and Parts List Exploded View & Parts List Exploded View & Parts List SyncMaster 800TFT Memo Main PCB Parts Electrical Parts ListElectrical Parts List Remarks C436 CIS CN102 FILTER-EMI SMD Chip Electrical Parts List R311 Electrical Parts List Chip Network RA412 RA413 RA414 RA415 RA416 RA417 RA418 X401 X501 Block Diagram Video SwitchBlock Diagrams Wiring Diagram Memo Signal input Part Schematic Diagram Schematic DiagramsScaler Chip Part Schematic Diagram 10-3 Micom Part Schematic Diagram 10-5 A/D converter Part Schematic Diagram BN68-00049R-01 Exploded View and Parts List Exploded View & Parts List Exploded View & Parts List SyncMaster 800TFT Memo Schematic Diagrams Scaler Chip Part Schematic Diagram 10-3 Micom Part Schematic Diagram 10-5 A/D converter Part Schematic Diagram