Nokia RH-18 - Regulators Voltage Ranges

RH-18/36/38 Company confidential
CCS Technical Documentation
Page 14 Nokia Corporation. Issue 1 10/03
Audio related faults 2: Headset
Figure 10: Headset troubleshooting
Headset earpiece do not
work and the isn't any
mechanical problem
Replace :
C183 and/or Z102
Defective D200*
R183, Z102
Check R183, Z102 is
working correctly
(no open-circuit)
No
Headset microphone do not
work and the isn't any
mechanical problem
Replace :
C183 and/or Z102
Defective D200*
R166
Check voltage level on R166
towards UEM (bias) = 2,1V
No
R152, R165, R168,
C172, C170, C173,
C174, Z101
Check XMIC line to UEM
(D200)
Check :
R166, R151, C171
R151
Check voltage level on R151
towards UEM (bias)
= 1,0V - 1,4V
No
Yes
Yes
Error still present
Replace :
Defective component
No