Microphone Part - Earphone Mic - Samsung GT-E2121B Service Manual

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 R118, R132, C141, C145 and
( When UCP201 operates
C142 again
and call is connected )
OK
Not OK
Check the circuit Solder L111, L113 and R120 again
of EAR MIC
OK
Repeat the sequence
Is Earphone MIC working?
No
Yes
END
9-8
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