Sharp PG-M20X Service Manual page 42

PG-M20X
» PC I/F Unit-9/12
Checking of SOG Circuit
Check pin (2) of IC8365 by
oscilloscope.
Is the composite sync signal
reproduced in correct timing?
No
Check the land of C8070 by
oscilloscope.
Is there the Y signal including sync
signal?
Yes
The SOG sync separation circuit
(input PWB) is defective.
Yes
The SOG circuit is normal.
End.
No
Go to "Confirmation of Input
Signal Setting".
42