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9-1-5. Microphone Part
Check the DC bias voltage on Mic path.
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Micro-phone does not work
Is the assembled status of
Microphone O.K?
YES
YES
The voltage of C381 is
about 2.4V ?
YES
The microphone is OK
YES
END
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Flow Chart of Troubleshooting and Circuit Diagrams
NO
Reassemble the microphone
Check the path around MIC
NO
NO
9-10
Bias circuit
Check UCP101
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