LG Flatron L1742P Service Manual page 20

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