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SGH-C120 Flow Chart of Troubleshooting
2-1-4. Microphone Part
Microphone does not work
Yes
No
Is the assembled status
Reassembled the microphone
of microphone O.K?
Yes
Check the reference voltage on mic path
Yes
Resolder or change
R400,R401,R402,R403,R404,R405
No
①
VR401 ≒ 2.0V ?
R407,R410,R413,R414,L400,L401
C403,C407,C413
Yes
No
②
Is microphone ok?
Check
U300
Yes
END
2-10
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