Microphone Part - Samsung SGH-X480 Service Manual

F low Chart of Troubleshooting

5. Microphone Part

M icrophone does not work
Is the assem bled status of
m icrophone O .K ?
C heck the reference voltage on M ic path
C 423 > 2.5V
Is m icrophone ok ?
Y es
Y es
Y es
Y es
E N D
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N o
R eassem ble the m icrophone
N o
Solder the m icrophone again or
R eplace around M ic C ircuit
(C 412, C 420, R 415, R 418.....)
N o
C heck U 100
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