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