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Flow Chart of Troubleshooting
3-10
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3-1-4. Microphone Part
Is the assembled status of
Key FPCB O.K?
Microphone does not work
Reassembled the Key FPCB
Resolder or change
R124,R128,R129,R130,R131,R132,R133,
C137,C138,C142,VR201,VR202
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check
UCP101
Check the reference voltage on mic path
VR201
≒
2.0V ?
Yes
①
②