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Flow Chart of Troubleshooting
3-10
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3-1-4. Microphone Part
Is the assembled status of
microphone O.K?
Microphone does not work
Reassembled the microphone
Resolder or change
R411,R414,C413,
C414
,
C418
,C420
C421
,
R422
,C415,
C419
,
R416
,
R419
R415,R420
END
No
Yes
Yes
Yes
Yes
No
Is microphone ok?
No
Check UCP301
Check the reference voltage on mic path
VR401 2.0V ?
Yes
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