User Guide

6015/6015i/6016i/6019i (RH-55), 6012 (RM-20)
Troubleshooting - Baseband Nokia Customer Care
Page 44 ©2004 Nokia Corporation Company Confidential Issue 1 - Revision 002 09/2004
UI Modules
Keypad
faults,
page 2
Are UI modules
keys working?
Change keypads
module. Is it
working?
Measure ROW0-4
Keyb(5) and
Keyb(9) signasl
between UPP and
Z300. Are they
~1.8V?
Measure ROW0-4
Keyb(5) and
Keyb(9) signals
between Z300 and
X300. Are they
~1.8V?
NO
Retest
YES
Make sure there
are no shorts on
Z300. If OK,
change the UPP.
Change Z300
Make sure there
are no shorts on
Z300. If OK,
change UPP
NO
YES
NO
NO
YES
END
YES