Headset Microphone Does Not Work; Headset Earpiece Does Not Work - Nokia RM-4 Troubleshooting Instructions

RM-4/RM-5
Troubleshooting Instructions

Headset microphone does not work

Headset earpiece does not work

Headset earpiece do not
ISSUE 1 02/2004
Headset microphone do not
work and it's not a
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
R154, R156, R160,
R162, R168, C172,
C170, C173, C174,
Z101
Check XMIC line to UEM
(D200)
Error still present
Defective D200*
work.
R183, Z102, C123,
C124
Check that components are
working correctly
Defective D200*
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CCS Technical Documentation
Replace :
No
R166 and/or Z101
Check :
No
R166, R151, C171
Replace :
No
Defective component
Replace :
No
R183 and/or Z102, C123,
C124
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