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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 IFC300 again
of IFC300
OK
Not OK
Check MIC_BIAS.
Solder C302,C304 and R301 again and
( When UME300 operates
check UCP200
and call is connected )
OK
Not OK
Solder R301,R329,R330,L316,L317,
Check the circuit
L301 and L302 again
of EAR MIC
OK
Repeat the sequence
Is Earphone MIC working?
No
Yes
END
9-8
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