Samsung GD15AS-NS Troubleshooting

CONFIDENTIAL

GD15N*/GD15A* 5-1

5 Troubleshooting

5-1 No Power

Does proper DC 14 V appear at

DC jack connected to CN101?

Check SMPS PCB and Adapter.

Yes

No

Does proper DC 5 V

appear at Pin 4 of IC101?

Check IC101.

Check IC201.

Yes

No

Does proper DC 2.5 V appear at

Pin 2, 4 of IC109, IC104?

Check IC199, IC104.

Yes

No

Does proper DC 3.3 V

appear at Pin 3 of IC103?

Check IC103.

Yes

No

CONFIDENTIAL

5 Troubleshooting

5-2 GD15N*/GD15A*

5-2 No Video (PC Signal)

Power indicator is green.

Does the signal appear at

R132, R133, R134?

Check R132, R133, R134, R137, R138,

R139, R103, R104, R105.

Yes

No

Does the clock pulse

appear at R357?

Check related circuit of IC301, FT301.

Yes

No

Does the clock pulse appear at

output of RA306 ~ RA311?

Check related circuit of IC301.

Yes

No

Does the clock pulse

appear at Pin 12 of IC204?

Check IC204 and related circuit of IC204.

Yes

No

Does the clock pulse appear at

output Pin 39, 40 of IC403?

Replace IC403.

Replace LCD Panel.

Yes

No