Flow Chart of Troubleshooting
10-6
10-1-4.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
R335
≒
2.0V
Yes
Resolder or change
R335,R336,R337,R338,R339,R340,R341,
C318,C320,C321,C322,C323,C361
No
Is microphone OK?
Yes
Check
UCP107
No
1
2
R364
R363
C322
C316
R354
C326
C319
L301
1
1
2
2
R359
R358
VCCA_2.9V
C336
R353
C327
R355
MICINN
MICOUTN
MICOUTP
MICINP
MIC+