Flow Chart of Troubleshooting
3-11
3-1-5. Microphone Part
Microphone does not work
Check the
assembled status of
microphone.
Reassemblage microphone
NO
YES
resolder or change
(
R402,
TA400,C407,R400)
Check the reference
voltage on mic path
R402=2.9V
NO
Is microphone ok?
YES
Check
UCP300
NO
YES
END
Microphone does not work
Check the
assembled status of
microphone.
Reassemblage microphone
NO
YES
resolder or change
(
R402,
TA400,C407,R400)
Check the reference
voltage on mic path
R402=2.9V
NO
Is microphone ok?
YES
Check
UCP300
NO
YES
END