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Flow Chart of Troubleshooting and Circuit Diagrams
3-1-5. Microphone Part
Microphone does not work
YES
Check the assembled status of
microphone
YES
Check the reference voltage on
mic path R411=2.9V
YES
Is Microphone O.K?
YES
END
NO
NO
NO
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Reassemble microphone
Resolder or Change
(R411,R414,R416,R418,R420,R421,
R422,C404,C405,C406,C408,C410)
Check UCD301
3-12
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