Nokia 7088 Troubleshooting Manual page 37

Nokia Customer Care
Audio
Faults 3
Is the internal
handsfree speaker
working?
YES
Audio
Faults
Page 4
Issue 1 12/2006 © 2006 Nokia Corporation
Select a ring tone and
measure signal between
NO
J424 Pin1 and Pin2. Is the
signal OK?
NO
Measure AUDIO_EN
(AUDIO_ENABLE on main
board). Is it OK (2.9V)?
YES
Measure signal between
SPK_N and SPK_P . Is the
signal OK?
NO
Check/ change R173, C171,
C172,C174 and C175.R175~R178.
Check VPH_PWR. Are the signals
OK?
YES
Replace U100 and retest.
Baseband Description and Troubleshooting
YES
NO
Yes
Company Confidential
7088 (Flower)
Change speaker
MSM6025 is
defective, phone
can not be repaired
and must be
replaced.
Check/changeL815,
L816,C509,C510,C5
11,C512.
Page 37