Nokia 7088 Troubleshooting Manual page 36

7088 (Flower)
Base band Description and Troubleshooting
Audio
Faults 2
Is onboard
microphone
working?
YES
Audio
Faults
Page 3
Page 36 © 2006 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 microphone bias voltage at
pin 1 of microphone. Is it 1.3V~ 1.5V?
YES
Is the signal going to the MSM6025
between MIC+ and MIC- ?
YES
Retest
YES
Check/ change R716,
C701 and R717. If OK,
defective, phone can
NO
Check/ change C713,
C706, C707, D410 and
NO
defective, phone can
Company Confidential
Retest
MSM6025 is
not be repaired and
must be replaced.
D411. If OK,
MSM6025 is
not be repaired and
must be replaced.
Issue 1 12/2006