Samsung GH17LS specifications Troubleshooting

Page 15

5 Troubleshooting

5-1-2 No Power

When Pin 6 of CN105 is

❇❇

around 2V, does proper DC 8V,

3V appear at Pin 1 and 7 of

CN105 seperately?

Yes

Does proper DC 5 V appear at

Pin 3 of IC115?

Yes

Push Power button.

Does proper 0V at Pin 6 of

CN105?

Yes

Does proper DC 3.3 V appear at

Pin 3 of IC112?

Yes

Does proper DC 2.5 V appear at

Pin 2 of IC116, IC117?

No

No

No

No

No

Change power Adaptor.

Check IC115 and related circuit.

Check function PCB Assy

and related circuit.

Check IC112 and related circuit.

Check IC116, IC117 and related circuit.

❇❇2V means soft power off or DPMS state.

5-2	GH17LS/GH17ES

Image 15

Contents TFT-LCD Monitor BN68-00225C-00 Copyright Safety Precautions PrecautionsElectrostatically Sensitive Devices ESD Precautions Servicing PrecautionsSpecifications Product SpecificationsType Pin No Separate Composite Pin AssignmentsIBM Vesa Timing ChartMemo Disassembly Disassembly and ReassemblyReassembly Changing Board Alignments and AdjustmentsRS232 Jig Setup Required EquipmentAlignments and Adjustments No Power TroubleshootingTroubleshooting No Video Waveforms Exploded View and Parts List GH17LS GH17ES Main PCB Parts Electrical Parts ListElectrical Parts List Code No IC-TTL TR-SMALL Signal Chip R149 GH17LS/GH17ES R278 Others Memo Block Diagram Block Diagrams Wiring Diagram Memo Schematic Diagrams Schematic Diagrams 10-3 10-4 SEC Panel DescriptionPanel Description