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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
Check Pin #F2 of PMU300
Not OK
Solder TA400,TA401,R401,
Not OK
Solder L421,L422,L400,L403 again
No
9-6
Solder MIC again
R402,R417 again
Replace MIC
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