NSB-9
Troubleshooting Instructions
CCS Technical Documentation
Page 64
Nokia Corporation
Issue 1 04/03
Audio
faults 2
Is the IHF
speaker
working?
Audio
faults 3
Yes
No
Measure DC
offset voltage
from speaker
pads (J150 / J151
to GND). Is it
~1.9V?
Check data
communication of
audio amp. control
lines J152, J153,
J154. Is it OK?
IHF 2
Yes
No
Set phone in LOCAL mode. Use
Phoenix “Audio Routing and Test
Signals” test. Set output path as IHF
speaker
(1
Check L151,
L152, R162,
C172 and
line. OK?
No Change defected
parts
No
Check lines if OK
change UPP.
If NOK change
radio module TB9
Yes
Yes
Change N150
Try to change
IHF speaker.
Is it working
now?
Retest
Yes
No
Check IHF
speaker
connections.
Is it OK?
No
Change
defected part
and retest
Yes
1) If not working set first “All outputs off” and after that “IHF speaker”
Содержание NSB-9
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