Baseband Troubleshooting Instructions
CCS Technical Documentation
Page 48
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Nokia Corporation
Issue 1 10/02
Connect EXT audio signal 1 kHz
(sine) (200 mVp-p) to XMICP pads
and ground to XMICN.
Measure sine signal
from earpiece pads.
Is it ~ 880 mVp-p?
Earpiece 2
Measure sine signal
from UEM (R156).
Is it ~ 130 mVp-p?
No
Retest
Yes
Change
UEM
Yes
Check R156, C153,
C155, R166, R167,
C163, R161, and
line.
No