User Guide

NPE-4
6 - Troubleshooting PAMS Technical Documentation
Page 6-14 ãNokia Corporation. Original
Keypad Failure
Power key failure
Keypad
fault
Power Key
OK?
Voltage on S300
approx = Vbat
Check C312 and
Z300
If Ok ->
UEM fail
Voltage on S300
while pressed
approx = Vbat
S300 ok ?
Change S300
Phone
jammed
Phone
dead
Keypad
fault 2
No
Yes
No
No
No
Yes
Yes
Yes