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