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 IC351 3rd pin
and 6th pin or not?
Whether does a signal
come to IC301 2nd pin
and 19th pin or not?
Investigate IC301 peripheral
circui.
Investigate IC701 first pin and
11th pin. Then investigate
IC6602 8, 9th pin and 12th pin
or a peripheral circuit.
Does a signal change at
a volume upgrade/knock
down or not?
Investigate IC301.
Is the voltage of IC351
12th pin DC 6V or not?
Investigate ICP505, D505 and
D509.
Does a signal come to
CP702 6th pin and 11th
pin or not?
Investigate headphone jack
(J351) or a peripheral circuit.
Investigate a speaker.