LG Flatron L1942P - Power Supply Issues

5. POWER
- 20 -
Copyright 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
NO POWER
(POWER INDICATOR OFF)
NO
Trouble in Fuse (F101)
CHECK 5V, 15V Line
NO
NO
Check D104,D105,D106,D107
Check U101 Pin7 : 9~10V
Check D102
Trouble in Q101
NO
Trouble in D201, D202,D203
YES
CHECK
Fuse F101 OK?
CHECK
C101 Voltage
(AC110V->160Vdc
(AC220V->304Vdc
CHECK
U101 Pin6 Waveform
(Square wave
Come out?)
Check Q101 Drain
Waveform
Check D201, D202
D203,Voltage
YES
YES
YES
YES
NO