Microphone Part - Phone Mic - Samsung SGH-M110 Service Manual

Flow Chart of Troubleshooting

9-4. Microphone Part - Phone MIC

Phone MIC does not work
Yes
Check the connection
of MIC
OK
Check MIC_BIAS_2.15V
( When UCP200 operates
and call is connected )
OK
Check the components
which are connected to
MIC_BIAS_2.15V
OK
Check the circuit
of MIC PART
OK
Is Phone MIC working?
Yes
END
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Not OK
Not OK
Solder C321 again and check U300
Not OK
Solder TA400, R409 again
Not OK
Solder C401,C403, C406, L400, L401,
R401, R407 and C403 again
No
9-6
Solder MIC again
Replace MIC