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SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
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9-9
9-5. Microphone Part - Earphone MIC
Earphone mic. does not work
Yes
Not OK
Check the connection
from EAR 300
Resolder EAR300 pin 2,3
Yes
Resolder L301, L302, C316, C321,
R342, C320
Check the circuit
EAR MIC
OK
Yes
Resolder R325, Check U400
R325=2.15V?
( When UCP200 operate
and call is connected )
END
Not OK
No
Is Earphone MIC working?
Repeat sequence
Not OK