Flow Chart of Troubleshooting
10-
10
10-1-5. Microphone Part
Microphone does not work
Check the
assembled status of
microphone.
Reassemblage microphone
NO
YES
resolder or change
(
R433
,
C439
,
C440)
Check the reference
voltage on mic path
R433=2.9V
NO
Is microphone ok?
YES
Check
UCP301
NO
YES
END