Sharp XG-V10WE Service Manual page 54

XG-V10WE
AN-SD1E/S422E
TROUBLE SHOOTING TABLE FOR PC I/F UNIT-8
Checking the SOG circuit
Measure the TL136 output on
oscilloscope screen.
Is the composite sync signal
reproduced in good timing?
No
Measure the C69 land on
oscilloscope screen.
Does the Y signal contain
sync signal?
Yes
SOG sync separation circuit
defective.
Yes
No problem with the SOG
circuit.
No
Check the input signal settings.
Input PWB defective.
54