Audio Failures - Nokia NKC-1X Series Troubleshooting Instructions

CCS Technical Documentation
Phone doesn't start
charging
Connect charger and
check VCHARIN
Check ICHAR
Check
R202,R203,R205,C217,
R202. R206, R207,
C220,C201,C202 and
C201, C202, C220, C240
R200
and R200
Change the

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 1Khz 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
measure the signal from the XEAR line. The Audio test box JBA-8 is needed. The
Issue 1 02/03
Figure 4: Fault tree, charging
Fail
OK
FAIL
OK
UEM
Nokia Corporation
Troubleshooting Instructions
Check
F100, L100, V100, C105
F100,L100,V100,C105
OK
Check bottom
connector
- VIN
- Charge control pin
NKC-1X
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