User Guide

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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

Yes

Is microphone ok?

Check U300

Check the reference voltage on mic path

VR401

≒

2.0V ?

Yes

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②