Nokia NHM-8NX Series Troubleshooting Instructions page 15

PAMS Technical Documentation
Issue 1 05/02
Headset earpiece do not
work and the isn't any
mechanical problem
R183, Z102
Check R183, Z102 is
working correctly
(no open-circuit)
Defective D200*
Headset microphone do not
work and the isn't any
mechanical problem
R166
Check voltage level on R166
towards UEM (bias) = 2,1V
Yes
R151
Check voltage level on R151
towards UEM (bias)
= 1,0V - 1,4V
Yes
R152, R165, R168,
C155, C156, C172,
C170, C173, C174,
Z101
Check XMIC line to UEM
(D200)
Error still present
Defective D200*
ãNokia Corporation
Troubleshooting Instructions
Replace :
No
C183 and/or Z102
Replace :
No
C183 and/or Z102
Check :
No
R166, R151, C171
Replace :
No
Defective component
NHM-8NX
Page 15