CCS Technical Documentation
Baseband Troubleshooting Instructions
Issue 1 10/02
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Nokia Corporation
Page 43
Figure 50: Phone is jammed
Measure
32.768 kHz SLEEPCLK
from testpoint J404.
Is it OK?
Measure
32.768 kHz SLEEPCLK
from B200.
Is it OK?
No
Measure
13 MHz RFCLK
from R420. Is it
OK?
Yes
Measure PURX
signal from testpoint J402
Is it high (1.8 V)?
Yes
Measure
VIO, VCORE,
FLASH1, VANA, and
VR3 voltages. Are
they OK?
Check
VBATT1-6, VIO,
VCORE, FLASH1,
VANA, and VR3
lines. Are they
OK?
No
Yes
Check BSI /
BTEMP lines.
If OK ->
UEM regulators
are not working.
Change UEM
Measure
26 MHz RFCLK
from C660. Is it
OK?
No
Check R661,
C661, R660,
C660. If OK ->
change G660.
No
Check R420 and
C420. If OK ->
change N600.
Yes
Change UEM
No
Yes
Check
L260 - L265,
C260 - C265,
BSI / BTEMP,
and VBATT1-6
lines.
No
Check B200,
C209, and
C210
No
Change UEM
Yes
Jammed
Page 2
Yes
Phone is
jammed