Table of Contents
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Flow Chart of Troubleshooting
3-1-4. Microphone Part
Microphone does not work
Yes
No
Is the assembled status
Reassembled the microphone
of microphone O.K?
Yes
Check the reference voltage on mic path
①
Yes
Resolder or change
No
K13 ≒ 2.8V ?
R121,R122,R116,
C134,C141,C148,C152
Yes
②
No
Is microphone ok?
Check U100
Yes
END
3-8
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Table of Contents
Troubleshooting
