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NSB-9
Troubleshooting Instructions
CCS Technical Documentation
Page 62
Nokia Corporation
Issue 1 04/03
Audio faults
Audio
faults 1
Is the earpiece
working ?
Try to change the
earpiece. Is it
working now?
Measure DC offset
voltage from earpiece
pads (against GND).
Is it ~1.36V ?
Measure MICB2 voltage
from XMICP (X102 /
pin10). Is it ~1.9V with
headset?
Retest
Check L150, C180,
C181, R152, R153
and line. If OK ->
change UEM
Check L103, R161,
C163, C162, R156,
R157, C158, C152,
C159 and line. If OK
-> change UEM
Audio
faults 2
Earpiece 2
Yes
Yes
Yes
Yes
No
No
No
No
Set phone to LOCAL mode. Set routing
EXT IN, HP OUT by using phoenix
“Audio Routing and Test Signals” test
Содержание NSB-9
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