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SGH-Z130 Flow Chart of Troubleshooting and Circuit Diagrams
2-
10
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2-1-5. Microphone Part
Micro-phone does not work
Is the assembled status of
Microphone O.K?
YES
Reassemble the
microphone
NO
Check the DC bias voltage on
Mic path.
The voltage of R242 is
2.6V
±
10%?
NO
Check the path around MIC
Bias circuit
Is microphone OK?
NO
Check U100
END
YES
YES
YES