Samsung GT-E2120 Service Manual page 29

Flow Chart of Troubleshooting
9-3. Microphone Part - Phone MIC
Phone MIC does not work
Yes
Check the connection
of MIC
OK
Check the components
which are connected to
MIC_BIAS
OK
Check the circuit
of MIC PART
OK
Is Phone MIC working?
Yes
END
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Not OK
Not OK
Solder R118, R132, C141, C145 and
Not OK
Solder L108, R131, ZD100 and ZD103
No
9-6
Solder MIC again
C142 again
again.
Replace MIC