Sharp XV-Z12000 Anleitung Seite 49

Check the SOG circuit.
Is the signal generator (input
source) set correctly?
YES
Is a composite synchronization
signal present at R8981?
NO
Is a composite synchronization
signal with the correct timing
being output to TL8136?
NO
Is a video signal present at pin
(17) of IC8367?
NO
The IC8367 peripheral circuit is
defective or the main unit is
defective.
NO
Set the signal generator (input
source) correctly.
YES
The SOG circuit is normal.
YES
The IC8325 peripheral circuit is
defective.
YES
The SOG circuits (IC8371 and
Q8022 - 23) are defective.
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XV-Z12000