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SGH-P400 Flow Chart of Troubleshooting
3-
9
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5. Microphone Part
Is the assembled status
of microphone O.K?
Microphone does not work
C420
=
2.0V
Reassemble the microphone
Solder the microphone again or
Replace C409,C416,R407,R409,R410,R411
END
No
Yes
Yes
Yes
Yes
No
microphone ok?
No
Check U700
Check the reference voltage on mic path
Yes