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