Nokia 6020b 服务手册
RM-31
Nokia Customer Care 6(a) - Baseband Troubleshooting Instructions
20
COMPANY CONFIDENTIAL
Issue 1 03/2005
Copyright © 2005 Nokia. All Rights Reserved.
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Audio faults 4
Change
speaker.
Is it working
now?
Check C2164, C2180. If
OK change UEMEK.
Check C2164,
L2151, L2152,
L2154, L2155,
L2154, L2155,
R2152, R2155,
lines and Vbat. If
OK change
UEMEK.
Yes
Yes
Yes
No
No
Audio
faults
4
Is
IHF speaker
working?
Set Phone in LOCAL
mode.
Use Phoenix Audio Test.
Set Ext microphone in Ihf
speaker out, Loop On.
Measure
DC volts on speaker pads.
Are they ~0.5Vbat (to
GND)
Retest
END
No