User Guide

Troubleshooting Instructions CCS Technical Documentation
Page 38 ãNokia Corporation. Issue 1 01/03
Keyboard
faults
Is the powerkey
working?
Measure voltage
from S302.
Is it HIGH?
Check S302.
Is it OK ?
Check R306,
C310, S302 and
POWERONX line.
If OK change UEM
Change S302
Phone is
dead
Measure voltage
from S302 when powerkey is
pressed.
Is it HIGH ?
No Yes
No
Keyboard
faults
2
Yes
Yes
Yes
Yes
Phone is
jammed