Nokia 6020b Manuales De Servicio
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Issue 1 03/2005
COMPANY CONFIDENTIAL
9
Copyright © 2005 Nokia. All Rights Reserved.
RM-31
6(a) - Baseband Troubleshooting Instructions
6(a) - Baseband Troubleshooting Instructions
Nokia Customer Care
■
Phone is dead 2
Is
PURX=1.8VDC
on J2800 1sec. after
power key
is pressed?
Dead2
Is Sleep CLK on
J2802 = 32.8kHz,
1.8Vpp?
Is VR3=2.78VDC
seen at C2234?
Is there a
26MHz clock
(typ) 850mVpp
at R2902?
Yes
Check: B2200,
C2241, C2210,
C2241, C2210,
PWB then
replace D2200
Replace
D2200, PWB
Yes
Check C2234
then replace
D2200, PWB
D2200, PWB
Check R2902,
C2902
Yes
No
No
No
No
Retest
See Waveform 1
See Waveform 2
Phone is
Jammed
Yes
Waveform 1
Waveform 2