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E-3
TROUBLESHOOTING GUIDE
YES
A voice isn't though an image
appears
NO
NO
YES
YES
YES
YES
NO
NO
NO
Whether does a signal
come to IC352 6th pin
or not ?
Whether does a signal
come to IC604 66th pin
or not ?
Investigate IC604 peripheral
circuit.
Does a signal change at
a volume upgrade/knock
down or not ?
Investigate IC604.
Is the voltage of IC352
1st pin DC 8V or not ?
Investigate ICP505, D505 and
D509.
Investigate headphone jack
(J351) or a peripheral circuit.
Investigate a speaker.
Investigate IC4001 76th pin,
78th pin and 80th pin.
Does a signal come to
CP351 6th pin or not ?