Samsung RS21-24NS, RS24NSSSW Troubleshooting

5 Troubleshooting

5-1 No Power

CONFIDENTIAL

Does proper DC 14 V appear at

DC jack connected to CN800?

Yes

Does proper DC 5 V appear at

Pin 2 of IC815 and IC816?

Yes

Does proper DC 5 V appear at

Pin 2 of IC810?

Yes

Does proper DC 2.5 V appear at

Pin 2 of IC804 and IC806?

No

No

No

No

Check SMPS PCB and Adapter.

Check IC815 and IC 816

Check IC810.

Check IC804 and IC806

.

Yes

Does proper DC 3.3 V appear at

Pin 2 of IC800, IC801 and IC805?

Yes

Check IC811 and IC817.

No

Check IC800, IC801 and IC805.

RS21N*/RS24N* 5-1

5 Troubleshooting

5-2 No Video (PC Analog Signal)

Power indicator is green

CONFIDENTIAL

Does the signal appear at Pin 7,

15 and 22 of IC203, IC206?

Yes

Does the clock pulse appear at

Pin 115 and 117 of IC203?

Yes

Does the colck pluse

appear at Pin 8 of IC207?

Yes

Replace LCD Panel.

No

No

No

Check R226, R228, R229,

C237, C238, C239, R246, R247,

R249, C258, C260, C262.

Check IC203 and related circuit of IC203.

Check related circuit of IC207.

5-2 RS21N*/RS24N*