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Flow Chart of Troubleshooting
9-1-3. Microphone Part
Microphone does not work
Is the assembled status of
Check the reference voltage on mic path
between MIC+&MIC- ≒ 0.8V?
Yes
microphone O.K?
Yes
Yes
On booting,
HSED_BIAS ≒ 1.8V ?
Yes
On booting,
Yes
END
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No
Reassembled the microphone
No
Check UCP300
No
Resolder or change
L512, C513, C514, C516, R545
9-5
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