Troubleshooting - Samsung RS21A Series Service Manual

5 Troubleshooting

5-1 No Power
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?
Yes
Does proper DC 3.3 V appear at
Pin 2 of IC800, IC801 and IC805?
Yes
Check IC811 and IC817.
RS21A*/RS24A*
No
Check SMPS PCB and Adapter.
No
Check IC815 and IC 816
No
Check IC810.
No
Check IC804 and IC806 .
No
Check IC800, IC801 and IC805.
CONFIDENTIAL
5-1