1-4. microphone part – Sharp SGH-C130 User Manual

Page 44

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Flow Chart of Troubleshooting

10-10

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10-1-4. Microphone Part

Is the assembled status

of microphone O.K?

Microphone does not work

Reassembled the microphone

Resolder or change

R150,R151,C156,R153,R152,C158

R147,TA109,C149,R194,C161,C160

END

No

Yes

Yes

Yes

Yes

No

Is microphone ok?

No

Check

U107

Check the reference voltage on mic path

VR118 ≒ 2.0V ?

Yes

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