Flow Chart of Troubleshooting
9-5. Microphone Part
Microphone does not work
Yes
Check the assembled status
of microphone.
Yes
Check the circuit
from U400 to MIC
Yes
Check U400 PIN 4
= ' H' ?
Yes
Check the MIC
Yes
END
No
Reassemblage microphone
①
No
Resolder the C409, C410, R407, R408
No
Check the JACK_EN signal
No
Replace the MIC
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