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10-1-4.Microphone Part
* Call with Sim before testing.
MicroPhone does not work
Check the soldered
status of microphone
Check the reference
voltage on mic path
R335 ≒ 2.0V
Is microphone OK?
MICINP
MICOUTP
MICINN
MICOUTN
Yes
Yes
Yes
Yes
END
R354
R358
C316
R359
R363
C322
R364
No
Resolder microphone
Resolder or change
No
R335,R336,R337,R338,R339,R340,R341,
C318,C320,C321,C322,C323,C361
No
Check
R355
MIC+
L301
1
1
C319
2
2
C326
C327
10-6
Flow Chart of Troubleshooting
1
2
UCP107
VCCA_2.9V
R353
C336
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