Audio Related Faults - Nokia NHM-8NX Series Troubleshooting Instructions

NHM-8NX
Troubleshooting Instructions

Audio related faults

Page 14
Earpiece do not work
Replace :
Earpiece
Error still present
Z150, R161
Check Z150, R161 is
No
working correctly
(no short/open-circuit)
Yes
Defective D200*
Microphone do not work and
the isn't any mechanical
problem
C103, Z100
Check C103, Z100 is
working correctly
(no short/open-circuit)
Replace :
System Connoctor
Error still present
R165
Check voltage level on
R165 towards UEM (bias)
= 2,1V
Yes
R153
Check voltage level on
R153 towards mic-lines (bias)
= 1,0V - 1,4V
ãNokia Corporation
PAMS Technical Documentation
Check :
R386, PWB.
Else defective D200*
Replace :
No
C103 and/or Z100
Check :
No
R165, C168, PWB.
Else defctive D200*
Check :
No
R153, R157,C151, C152,
C153, C154, PWB.
Issue 1 05/02