Flow Chart of Troubleshooting
10-1-4. Microphone Part
Micro-phone does not work
NO
Is the soldering status of
Re-soldering the Microphone
Microphone O.K?
YES
Check the DC bias voltage on
Mic path.
NO
Is the voltage of VR501
Check the UCD300
about 2.2V±10%?
YES
Replace the Microphone
END
10- 12
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