Display Information: Contact Service; Figure 5: Power Won't Stay On Or Jammed Phone - Nokia NSB-5 Series Troubleshooting Instructions

NSB-5
Troubleshooting Instructions
Power doesn't stay on or
phone is jammed
Check X400 pin 13 while
X400 pin 2 is high
pin 13 pulsing?
No
Connect R413 (end
towards N100) to GND
C308 (end away from B400
buzzer) = 2.8V
and C112 (end towards N100) =
The label "C" refers to Figure 2.

Display Information: Contact Service

This fault means that software is able to run and thus, the watchdog of CCONT (N100)
can be served.
Self-test functions are run when power is switched on and software has started to exe-
cute from flash. If any of the self-tests fail, contact service information will be shown on
Page 12
Software is able to run in phone. Check
Yes
If power is switched off in a few seconds,
2.8V
Yes
C

Figure 5: Power Won't Stay on or Jammed Phone

Nokia Mobile Phones Ltd.
PAMS Technical Documentation
UI-module.
check BSI and BTEMP lines.
No
Vbatt is correct 3.6V
Yes
N100 is faulty.
Issue 1 03/01