Nokia 2600 服务手册
RH-59/60
Nokia Customer Care
10
COMPANY CONFIDENTIAL
ISSUE 1 09/2004
Copyright © 2004 Nokia. All Rights Reserved.
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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.
ASICs missing contact with PWB.
If for some reason the MCU does not service the watchdog register within the UEM, the oper-
ations watchdog will run out after approximately 32 seconds. Unfortunately, the service routine
can not be measured.
ations watchdog will run out after approximately 32 seconds. Unfortunately, the service routine
can not be measured.
Figure 3:Phone jammed troubleshooting
Power doesn't stay on,
or phone is jammed
J404
Sleep clock = 32.768 kHz,
1.8Vpp
Yes
Check :
D450, Keymat,
Lightguide, PWB.
Else defective D400*
UI functionality,
and keys react
to pressure?
Check :
PWB.
Else defictive D200*
Yes
No
No
J402
PURX = 1,8VDC,
1 sec. after power-key is
pressed
Check :
C420, C426, R420,
R426, N600(Mjoelner)
Yes
No
Yes
Reflash phone
Check :
B200, C209, C210, PWB.
Else defective D200*
No
R426
26 MHz clock min.
300mVACpp,
probe Cin=10-13 pF/10M