Power Does Not Stay On Or Phone Is Jammed - Nokia NHM-8NX Series Troubleshooting Instructions

PAMS Technical Documentation

Power does not stay on or phone is jammed

If this kind of failure is presenting itself immediately after FLALI, it is most likely caused
by ASICs missing contact with PWB.
If for some reason the MCU does not service the watchdog register within the UEM, the
operations watchdog will run out after approximately 32 seconds. Unfortunately, the
service routine can not be measured.
Issue 1 05/02
Power doesn't stay on,
or phone is jammed
J404
No
Sleep clock = 32.768 kHz,
1.8Vpp
Yes
J402
PURX = 1,8VDC,
No
1 sec. after power-key is
pressed
Yes
UI functionality,
and keys react
No
to pressure?
Yes
J425
26 MHz clock min.
No
300mVACpp,
probe Cin=10-13 pF/10M
Yes
Reflash phone
ãNokia Corporation
Troubleshooting Instructions
Check :
B200, C209, C210, PWB.
Else defective D200*
Check :
PWB.
Else defictive D200*
Check :
D450, Keymat,
Lightguide, PWB.
Else defective D400*
Check :
C425, C426, R425,
R426, N600(Mjoelner)
NHM-8NX
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