Nokia NPC-1 Series Troubleshooting Instructions page 8

NPC-1
Troubleshooting Instructions
• Default value for Vcore is 1.5 volts and, if the software is running, Vcore will
rise to 1.8 volts.
• Cbus (1.08MHz) clock starts running.
Phone does not start up normally or does not stay on
Note: In case of power up faults, it is not possible to force the phone on by disabling
the watchdog. Instead, measurements should be taken immediately when the power
key is pressed or when the battery voltage is connected to the phone (local/test
mode).
The easiest way to check if the software is running when the phone takes an abnormal
amount of current is to measure the cbusclk and Vcore.
The Dbus clock (programmable 9.72MHz) is not automatically visible in the test and local
modes.
Page 8 ãNokia Corporation
PAMS Technical Documentation
Issue 1 10/01