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Flow Chart of Troubleshooting
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9-7
9-4. Microphone Part - Phone MIC
Phone mic. does not work
Yes
Not OK
Check the connection
from MIC
Resolder MIC
Yes
Replace MIC
OK
Is Phone MIC working?
OK
Resolder TA301, R323, R324, R326
Check the circuit
OF MIC_BIAS part
Yes
Resolder C308, C310, L308,
L309,C307, C311, L310, L311, R321
Check the circuit
of MIC part
OK
END
Resolder R325, Check U400
R325=2.15V?
( When UCP200 operate
and call is connected )
Not OK
No
Not OK
No
