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Flow Chart of Troubleshooting
10-1-4. Microphone Part
Microphone does not work
Yes
No
Is the assembled status of
Reassemble the mic FPCB
mic FPCB ok?
Yes
No
Is the DC bias voltage on
Check the path around MIC bias circuit
MIC path at R514 2.85V?
Yes
No
Is the Mic path component
Resolder the toruble point
soldering status ok ?
Yes
No
Is microphone ok?
Check the UCP300
END
10-8
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