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Flow Chart of Troubleshooting
11-10
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1
1
-1-4. Microphone Part
Is the assembled status
of microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R500,R501,R502,R505,R514,R517,
C502,C505
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check
U101
Check the reference voltage on mic path
C111
≒
2.8V ?
Yes
①
②