User Guide

NSB-5

Troubleshooting Instructions PAMS Technical Documentation

Page 12 Nokia Mobile Phones Ltd. Issue 1 03/01

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

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

Power doesn't stay on or

phone is jammed

Check X400 pin 13 while

X400 pin 2 is high

pin 13 pulsing?

Software is able to run in phone. Check

UI-module.

If power is switched off in a few seconds,

check BSI and BTEMP lines.

Yes

Connect R413 (end

towards N100) to GND

C308 (end away from B400

buzzer) = 2.8V

and C112 (end towards N100) =

2.8V

Vbatt is correct 3.6V

N100 is faulty.

Yes