User Guide

Nokia Customer Care 6(a) - BB Troubleshooting Instructions
RH-37
Issue 1 07/04 Nokia Corporation Page 25
Keypad faults 1
Measure
voltage from S2419.
Is it 3.7V?
Measure
voltage from S2419
when power key
is pressed.
Is it high?
Check
S2419.
Is it OK?
No
No
Yes
Yes
Yes
Yes
No
No
Keypad
faults
Is the
power key
working?
Check R2423,
C2402, C2400,
S2419 and line.
If OK change UEM
Phone is
dead
Change S2419
Phone is
jammed
Keypad
faults
2
Retest