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9-4. Microphone Part - Earphone MIC
Phone MIC does not work
Check the connection pin
Check MIC_BIAS
( When UCP200 operates
and call is connected )
Check the circuit
Is EarPhone MIC
Yes
3, 4 of IFC300
Yes
Yes
of EAR MIC
Yes
Working?
Yes
END
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No
Resolder the PBA
No
Resolder TA100, R100, R104 and
check UCP200
No
Resolder C301, C302, C303, C304, C305,
R301, R303, L301 and L302
No
Repeat the sequence
9-10
Flow Chart of Troubleshooting
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