Audio Failures - Nokia RH-41 Series Troubleshooting Instructions

CCS Technical Documentation

Audio failures

In case of audio failures, there are three possibilities to check the audio lines.
1 Make a phone call against tester and check audios.
2 In case the earpiece/XMIC fails: Feed a 1 Khz signal to the XMIC line and measure
the signal from the earpiece line. The Audio test box (JBA-8) is needed. The Audio
loop (Audio test/Ext In Hp Out) must be switched on by the Phoenix service soft-
ware. This loop will connect audios only through the UEM. In this case, the UPP is
not used.
In case the internal microphone/XEAR fails: Feed the tone to the microphone and mea-
sure the signal from the XEAR line. The Audio test box (JBA-8) is needed. The Audio loop
Issue 2 09/2003
Phone doesn't
start charging
Connect charger and
check VCHARIN
OK
Check ICHAR
Fail
Check R202, R206,
R207, C201, C202,
C220, C240, and
R200
OK
Change the UEM
Figure 3: Fault tree, charging
Nokia Corporation
Troubleshooting Instructions
Check F100, L100,
Fail
V100, and C106
OK
Check bottom
connector
-VIN
_Charge control pin
Confidential
RH-41
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