Nokia 6020b Service Manual
Issue 1 03/2005
COMPANY CONFIDENTIAL
19
Copyright © 2005 Nokia. All Rights Reserved.
RM-31
6(a) - Baseband Troubleshooting Instructions
6(a) - Baseband Troubleshooting Instructions
Nokia Customer Care
■
Audio faults 3
Measure DC
volts on
speaker pads of
X2002, pin 11 - 14. Are they
~0,8V DC (to GND)
Set phone in LOCAL mode.
Use Phoenix Audio Test. Set
Ext microphone in Ext speaker
out, Loop On.
Change UEM
Check L2001, C2020,
C2021, C2181, R2175,
X2002 and lines. If ok
change UEM
Set phone in LOCAL mode.
Use Phoenix Audio Test. Set
Ext microphone in Ext
speaker out, Loop On
Check R2174, R2162,
C2170, C2173 and
lines. If ok change
UEM
Audio
faults
4
Measure DC volts
on micp pad of
X2002, pin 10. Is it
~2.2 V DC (to GND)
Check R2173, C2150,
C2176, C2184, R2158,
R2171, L2000, C2012,
C2013, X2002 and
lines. If ok change UEM
Yes
No
Yes
Yes
Yes
No
No
No
Audio
faults
3
Is Ext-mic
working
Is Ext-ear
working
Retest