Samsung SGH-P408 Service Manual page 21

5. Microphone Part
M icrophone does not work
Is the assem bled status
of m icrophone O .K ?
Check the reference voltage on m ic path
C 420 ¤ó 2.0V
Is m icrophone ok?
Y es
Y es
Y es
Y es
END
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SG H- P408 F low Chart of Troubleshooting
No
R eassem ble the m icrophone
No
Solder the m icrophone again or
R eplace C409,C416,R 407,R 409,R 410,R 411
No
Check U700
3- 9