Checking the SOG Circuit
Measure the pin (7) of IC5001
with an oscilloscope.
This is the failure of the SOG
synchronization separator circuit.
Is there the Y signal including sync
signal?
Measure the pin (2) of Q5001
with an oscilloscope.
Is the composite synchronized
signal regenerated at proper timing?
NO
Is there any output from the pin
(25) of IC3102?
NO
The SOG circuit is normal.
End.
YES
YES YES
Check Q3110 and its
peripheral circuits.
NO
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