Service manual

SAMSUNG Proprietary-Contents may change without notice
Flow Chart of Troubleshooting
This Document can not be used without Samsung's authorization
10-8
10-1-4. Microphone Part
Micro-phone does not work
Is the assembled status of
Microphone O.K?
YES
Reassemble the microphone
NO
Check the DC bias voltage on
Mic path.
The voltage of C422 is
about 2.2V±10%?
NO
Solder the microphone again
or Replace
C422,C423,R415,R420,R421
Is microphone OK?
NO
Check U302
END
YES
YES