Samsung 920NW - SyncMaster - 19" LCD Monitor

4 Troubleshooting
4-3
4-3 Output power is unstable
Check sampling
Circuit
Check the R pin
voltage of IC803
about 2.5V
Check pin1 of
IC802 voltage is
5.8V
Check pin1 of
IC802 voltage
about 3V
Check R818, D804,
C807 if short
Check the C pin
voltage of IC803 if
3V
Check R822, R823,
R824
Unstable power
Change R822, R823,
R824
Change IC803
Check R819, R820
END
Change R818
Change R808, R809,
R810, R811