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Flow Chart of Troubleshooting
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9-9
9-5. Microphone Part
Check the connection
from MIC
Check the voltage of
MIC BIAS (2.15V).
Resolder MIC
Replace PM IC or PBA
No
Yes
Yes
Yes
No
No
END
Yes
Check the MIC
No
Replace the MIC
Microphone does not work
Resolder the Surrounding capacitors
Check the circuit
from
EAR700
to MIC
Yes