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R15AAC/AAU (vs15)
Check audio speaker is working.
OK
NG
Failure Point
1) Audio output wire is disconnected from the
interface board P309 to key function board
P601.
2) Printed wire broke between P601 and J600 for
the key function board.
3) C610, C609 are short.
4) J600 phone-jack is failure.
5) Audio speaker unit is disconnected from P602.
Failure Point
Audio speaker unit "L" or "R" is failure.
Check I312 pin10 Mute if is high level.
NG
OK
Failure Point
1) Printed wire broke between I307 pin57 and
Q309and I312 pin10.
2) R383, R384, R385, R338, C393 are open or
short.
3) Q312 is filure.
4) I307 is failure.
Continue
Check I316 pin4, 6 audio signal output.
NG
OK
Failure Point
1) Printed wire broke between I312 pin12, 14
and P309 pin1, 3.
2) C386, C388 open or short.
3) I312 is failure.
