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SGH-X120 Flow Chart of Troubleshooting and Circuit Diagrams
5. Microphone Part
Micro-phone does not work
Is the assembled status of
Microphone O.K?
Check the DC bias voltage on
Mic path.
The voltage of C476 is
2.2V±10%?
Is microphone OK?
END
YES
YES
YES
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NO
Reassemble the microphone
Solder the microphone again
NO
C434,C476,R416,R415,R440
NO
2-6
or Replace
Check U300
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