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9-5. Microphone Part - Earphone MIC
Earphone MIC does not work
Check the connection
Check JACK IN is low
when ear jack is inserted.
Check MIC_BIAS_2.15V
( When UCP200 operates
and call is connected )
Check the circuit
Is Earphone MIC working?
Yes
of IFC600
OK
OK
OK
of EAR MIC
OK
Yes
END
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Not OK
Resolder pin 3, 4 of IFC600
Not OK
Resolder IFC600, R601
Not OK
Resolder R607, R608, R614, and
R616 again and check U402, U601
Not OK
Resolder L600, L601, L602, L604,
C613, C617, and U601
Repeat the sequence
No
9-9
Flow Chart of Troubleshooting
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