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Flow Chart of Troubleshooting and Circuit Diagrams
3-13
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3-1-5. Microphone Part
Microphone does not work
END
Reassemble Microphone
NO
MIC filter circuit around
UCP300 is OK ?
Resolder MIC filter circuit or check
UCP300
NO
NO
Check the MIC bias circuit path
YES
YES
Is the assembled status of
Micropohone OK ?
Check the DC bias voltage
on MIC path C405 = 2.3V ?
YES