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Flow Chart of Troubleshooting
10-10
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10-1-4. Microphone Part
Is the assembled status
of microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R150,R151,C156,R153,R152,C158
R147,TA109,C149,R194,C161,C160
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check U107
Check the reference voltage on mic path
VR118
≒
2.0V ?
Yes
①
②