NPD-4
Troubleshooting — BB
Keypad faults
Power key
Keypad faults
Is power key working?
Yes
Keypad faults 2
Page 40
Measure voltage at
No
S300. Is it HIGH?
Yes
Measure voltage at
S300 when power key
is pressed. Is it HIGH?
Nokia Corporation
CCS Technical Documentation
Check S300 and
R304. If OK, change
No
UEM.
Change S300
Yes
Confidential
Issue 1 02/2003