Nokia NPM-6 Series Troubleshooting Instructions page 38

NPM-6/6X
Troubleshooting Instructions
Earpiece
2
Connect EXT audio
signal 1kHz(sine,
200mVpp) between
XMICP and XMICN
pads (X101, 11/12)
Measure sine
signal from earpiece
pads (J310,J311).
Is It ~880mVpp ?
Yes
Change UPP
Retest
Page 38
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Measure sine
signal from UEM
No
(R151,R152).
Is it ~130mVpp ?
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CCS Technical Documentation
Yes
No
Change UEM
Check R151,R152,
C155, L150 and lines.
Issue 2 06/03