Flow Chart of Troubleshooting

10-1-4. Microphone Part

Microphone does not work

Yes

Is the assembled status

of microphone O.K?

Yes

No

Reassembled the microphone

Check the reference voltage on mic path

Yes

No

VR118 2.0V ?

Yes

No

Is microphone ok?

Yes

END

 

Resolder or change

 

 

 

R150,R151,C156,R153,R152,C158

 

R147,TA109,C149,R194,C161,C160

 

 

 

 

 

 

 

 

 

Check U107

 

 

 

 

 

10-10

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Page 44
Image 44
Sharp SGH-C130 manual Microphone Part