SAMSUNG LW-15E23CR Service Manual Troubleshooting

5 Troubleshooting

5-1 No Power

Does proper DC 14 V appear at

DC jack connected to CN801?

Yes

Does proper DC 5 V appear at

Pin 1 of IC803?

Yes

Does proper DC 14V appear at

Pin 2 of IC803?

Yes

Does proper DC 3.3 V appear at

Pin 1 of IC804?

No

Check SMPS PCB and Adapter.

No

Check IC803.

No

Check IC803.

No

Check IC804.

Yes

Does proper DC 2.5 V appear at

Pin 4 of IC105?

Yes

Check IC908.

ES15A*/ES17A* 5-1

No

Check IC105.

5 Troubleshooting

5-2 No Video (PC Signal)

Power indicator is green.

Yes

Does the signal appear

at C106, C107, C108

of R, G, B input?

Yes

Does the clock pulse

appear at X100?

Yes

Does the clock pulse appear at

output of RA102 ~ RA107?

Yes

Does the clock pulse

appear at R401?

No

Check CN100.

No

Check X100 and related circuit of X100.

No

Check related circuit of IC102.

No

Check R401 and related circuit of R401.

Yes

Does the clock pulse appear at

output of R605 ~ R614?

Yes

Replace LCD Panel.

5-2 ES15A*/ES17A*

No

Replace R605 ~ R604.