Audio Troubleshooting 3: Headset Does Not Work - Nokia 2650 Service Manual

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Audio troubleshooting 3: Headset does not work

Headset microphone do not
Issue 2 06/2005
Figure 12:Headset does not work
work and the isn't any
mechanical problem
Z101
Check Z101 is working
correctly
(No short/open circuit)
Yes
R151
Check voltage level on R151
towards UEM (bias)
= 1,0V - 1,4V
Yes
R151
Check voltage level on R151
towards UEM (bias) = 1,0V -
1,4V
Check XMIC line to UEM
(D200)
Error still present
Defective D200*
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Replace :
No
Z101
Check :
No
R166, R151, C171
Check :
No
R156, C170, C174, C172,
R169
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