Samsung ML15ASASS Troubleshooting

SyncMaster 150MP 5-1

5 Troubleshooting

5-1 No Power

Does proper DC 12 V appear at

DC jack connected to CN102?

Check SMPS PCB and Adapter.

Yes

No

Does proper DC 5 V appear at

Pin 1 of IC103?

Check IC103.

Check IC101.

Yes

No

Does proper DC 2.5 V appear at

Pin 2 of IC100?

Check FT116 and IC100.

Yes

No

Does proper DC 3.3 V appear at

Pin 1 of IC104?

Check IC104.

Yes

No

5 Troubleshooting

5-2 SyncMaster 150MP

5-2 No Video (PC Signal)

Power indicator is green

Does the signal appear at Pin 7,

15, 22, of IC107?

Check R155 ~ R157, C151 ~ C153.

Yes

No

Does the clock pulse appear at

Pin 115, 117 of IC107?

Check IC107 and related circuit of IC107.

Yes

No

Does the clock pulse appear at

output of RA301 ~ RA304?

Check related circuit of IC301.

Yes

No

Does the clock pulse appear at

Pin 37 ~ 48 of IC501?

Check IC501 and related circuit of IC501.

Yes

No

Does the clock pulse appear at

output of FT501 ~ FT510?

Replace FT501 ~ FT510.

Replace LCD Panel.

Yes

No