Phone Does Not Stay On, Or Phone Is Jammed - Nokia RM-14 Baseband Troubleshooting And Manual Tuning

RM-14
Baseband Troubleshooting and Manual Tuning
■

Phone does not stay on, or phone is jammed

If the MCU doesn't service the watchdog register within the UEME, the operations watchdog
will run out after approximately 32 seconds. It is not possible to measure this service routine.
Phone does not stay on
or is jammed
Verify that system clock is @
~26MHz, min300mVaCpp on
C422 pin2 towards D400 (TIKU)
with regular probe Cin~10-13pF/
10M
Measure voltage on PURX=
1.8Vdc on N6031 ~1sec
after the power key is pressed.
UI functionality and keys
react to pressure
Can extraction of SIM holder
switch off the phone.
Is everything working until
phone shuts down after ~32sec
No
Replace SIM
gate
ISSUE 1 11/04
Figure 5:Phone does not stay on, or is jammed
Yes
Yes
Yes
Yes
Yes
No
Retest and if phone
still doesn't work
change whole engine
board.
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
No
Check C422, R420, N500
(Helgo), G501 (26MHzXTAL)
and PWB.
No
Swap the phone
No Check Z300,
UI board, keymat, lightguide,
and PWB.
Yes
Swap the phone
Note!
The boxes inside the
blue lines are not
changeable or measurable!
Nokia Customer Care
11