Nokia 3105 Servicehandbuch
CCS Technical Documentation
Troubleshooting — BB
RH-48
Issue 1 11/2003
© 2003 Nokia Corporation Confidential
Page 47
Keypad faults
Keypad
faults
Keypad
faults,
page 2
Measure voltage at
S300. Is it high?
Is the power key
working?
Check S302, C310,
and R306. If OK,
change UEM
Measure voltage at
S302 when power
key is pressed. Is it
high?
Change S302
Phone is
jammed
NO
NO
YES
Check S302. Is
it OK?
Phone is
dead
YES
YES
YES
NO
NO