LG flatron M1740A - Page 19

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3. NO RASTER ON AV1, AV2, TV
NO RASTER ON VIDEO
SIGNAL
Check Peripheral Circuit
Of J802(Scart)
NO
Change Video Board Ass'y
YES
Check Cable of J106
Check Video Board
Check
U908 Pin #1,#3 : 5V, 3.3V
Check U909 Pin #3 : 1.8V
In Case of AV1(Scart)
In Case of TV
NO
Change Video Board Ass'y
NO
YES
Check Peripheral Circuit
YES
YES
Check Tuner TU802
Check Connection of EXT.
YES
7 8 9
Waveforms
7
8
9
U908-#1(5V) U908-#3(3.3V) U909-#3(1.8V)
YES