Nokia NSB-9 Service Manual page 241

CCS Technical Documentation
Ext.
audio out
2
Yes
Use Phoenix "Audio Routing and
Test Signals" Test. Use internal
sine wave generator and set
signal frequency to 1kHz and
peak level to 4000 Hex
Measure differential
sine signal from
HSEAR P&N and
HSEAR R P&N
speaker pads. Is it
~60mVpp?
Yes
Retest
Issue 1 04/03
Check C174,
No
C169 and
XAUDIO(7) line.
Are they OK?
Change UEM
and retest
Nokia Corporation
Troubleshooting Instructions
No
Change defect
part and retest
Yes
NSB-9
Page 67