User Guide

Nokia Customer Care Baseband Description and Troubleshooting
6255/6255i6256/6256i (RM-19)
Issue 2 05/2005 ©2005 Nokia Corporation Company Confidential Page 63
Keypad Faults
Power Key
Keypad
faults
Keypad
faults,
page 2
Measure voltage
at pin 1 and 3
(S300). Is it
high?
Is the power key
working?
Check S300,
C314, and R304.
If OK, change
UEM
Measure voltage
at pin 1 and 3
(S300) when the
power key is
pressed. Is it
high?
Check S300. Is it
OK?
NO NO
YES
YES
NO
YES
Mobile terminal
is Jammed
Mobile terminal
dead
YES
NO
Change S300