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Flow Chart of Troubleshooting
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9-9
9-5. Microphone Part
Check UCP300
Microphone does not work
Replace the PBA.
No
Is the the path around MIC
bias circuit O.K?
No
Yes
Yes
Yes
Yes
No
END
Replace the MIC.
Is the voltage of C536
2.1V ?
Is the SMD status of
microphone O.K?