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Flow Chart of Troubleshooting
9-4. Microphone Part - Earphone MIC
Earphone MIC does not work
Yes
Not OK
Check the connection
Solder pin 3 of IFC100 again
of IFC100
OK
Not OK
Check MIC_BIAS.
Solder L120, L121, L124, R108, R110,
( When UCP200 operates
C133, C139 and TA101 again
and call is connected )
OK
Not OK
Check the circuit
Solder L109, L110 and R220 again
of EAR MIC
OK
Repeat the sequence
Is Earphone MIC working?
No
Yes
END
9-8
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