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NO VERTICAL
Is the normal signal
output to 34PIN of
IC601?
YES
Is the normal signal
input in the base of
Q405?
YES
Is the normal signal
output to 9PIN of
FB401?
YES
Check IC601 associated
circuit.
TROUBLESHOOTING GUIDE
NO
NO
NO
AV-20FD22
Check IC601 associated
circuit.
Check R449 and Q401.
Check FB401 and associated
circuit.
25
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