User Guide

Technical Documentation
NHB–3
PAMS
Troubleshooting
Original 26/97
Page 8
PWR Button Fault
Phone does’nt start when
N271/PSL
N271/PSL pins 5,2
Change
Check components
YES
NO
YES
PWR button is pressed
VBATT voltage
pin 10 +5 V when
VBATT is connected
Check
X100
NO
YES
Change
N271
N271/PSL
pin 10 +5–>0 V when
push PWR button
FLEX
Check
X196
R110, C113
around N271 if OK
change N271
OK?