Check the synchronization
signal.
YES
NO
Set the signal generator (input
source) correctly.
Is the signal generator (input
source) set correctly?
YES
NO
Is a vertical synchronization
signal present at TL8134?
YES
NO
The main unit is defective.
Is a horizontal synchronization
signal present at TL8133?
YES
NO
Is a vertical synchronization
signal present at TL8131?
YES
NO
The IC8302, IC8325 or IC8001
peripheral parts are defective.
Is a horizontal synchronization
signal present at TL8130?
YES
NO
The main unit is defective.
Is the timing for both the vertical
and horizontal synchronization
signals correct?
Are the synchronization signals
normal?
Go to "GA4 peripheral check".
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