Sharp XV-Z200U Service Manual page 31

Checking of SOG Circuit
Measure the pin (7) of IC5012
with an oscilloscope.
Is the composite synchronized
signal regenerated at proper timing?
No
Measure the pin (7) of IC5010
with an oscilloscope.
Is there the Y signal including sync
signal?
Yes
This is the failure of the SOG
synchronization separator circuit.
Yes
The SOG circuit is normal.
End.
No
Is there output of the pin (25)
of IC3102?
Yes
31
XV-Z200U/E, XV-Z201E
DT-300
No
Check around Q5002.