Nokia 1265 Description And Troubleshooting page 32

1265 (RH-103)
Baseband Description and Troubleshooting
Audio
Faults 2
Is onboard
microphone
working?
YES
Audio
Faults
Page 3
Page 32 © 2007 Nokia Corporation
Replace the
microphone. Is it
NO
working now?
NO
Use CCS Software Testing
Stereo Audio/Vibra
Microphone Mobile terminal
Microphone Test command
Measure MICBIAS voltage from MIC+
pads. Is it 1.6V~ 1.95V?
YES
Is the signal going to the MSM at
MIC1+ and MIC- at C541?
YES
Retest
YES
NO
NO
Company Confidential
Retest
Check/ change
R538,C573. If OK,
MSM is defective,
phone can not be
repaired and must be
replaced.
Check/ change
C571, C572, R542.
If OK, MSM is
defective, phone can
not be repaired and
must be replaced.
Issue 1 04/2007