User Guide

PAMS
Technical Documentation
NSE–5
Troubleshooting
Page 9
Issue 1 07/99
3. Power doesn’t stay on or phone is jammed
If this kind of fault has come after flash programming, there are most
probably open pins in ICs.
The soldered joints of ICs: D300 (MAD2Pr1), D301 & D303 (FLASH),
N100 (CCONT), D302 (SRAM) are useful to check at first.
Normally the power will be switched off by CCONT (N100) after 30
seconds, if the watchdog of the CCONT can not be served by software.
Check watchdog is updated. X400 pin 2 is high and at the same time
X400 pin 13 toggles. In the normal case there is a short burst of pulses
every 8 seconds.
The power off function of CCONT can be prevented by connecting a short
circuit wire from CCONT R413 (end towards edge) to ground.