LG FLATRON L1919S-SFQ.A REP Series - Page 20

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5. POWER
NO POWER
(POWER INDICATOR OFF)
NO
Trouble in Fuse (F101)
CHECK 5V, 12V Line
NO
NO
Check BD101
Check U101 Pin7 : 9~10V
Check D102
Trouble in Q101
NO
Trouble in D201, D202
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
Voltage
YES
YES
YES
YES
NO