User Guide

SGH-E620 Flow Chart of Troubleshoo ting
2-8
2-4.Microphone Part
* Call with Sim before testing.
Check the soldered
status of microphone
MicroPhone does not work
Resolder microphone
END
No
Yes
Yes
Check the reference
voltage on mic path
R437, R439
≒
2.0V
Yes
Resolder or change
R429,C422,R433,R432,R437
R434,C429,R435,R436,R439
No
Is microphone OK?
Yes
Check U100
No
1
2
1
1
1
2