Audio Troubleshooting 1, 2; Fig 10 Microphone Does Not Work; Fig 11 Top: Earpiece Does Not Work - Nokia RH-53 Troubleshooting Instructions

Nokia Customer Care
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Audio troubleshooting 1, 2

Microphone do not work and
16
Figure 10:Microphone does not work
the isn't any mechanical
problem
Z100
Check Z100 is
working correctly
(no short/open-circuit)
Replace :
Mic and micboot
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
Figure 11:Top: Earpiece does not work
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*
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Replace :
No
Z100
Check :
No
R165, C168, PWB.
Else defctive D200*
Check :
No
R153, R157,C151, C152,
C153, C154,R171, PWB.
Replace :
No
C183 and/or Z102
RH-53/54
ISSUE 1 09/2004