Nokia NSB-9 Service Manual page 239

NSB-9
CCS Technical Documentation Troubleshooting Instructions
IHF 2
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 Check C174,
No No
Change defect
signal from IHF C179, C178, R163
part and retest
speaker pads and XAUDIO(7)
J150, J151. Is it line. Are they OK?
~810mVpp?
Yes
Yes Change UEM
and retest
Retest
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Issue 1 04/03 Page 65