Nokia RH-66 Troubleshooting Manual page 50

2115i/2116/2116i (RH-66)
Baseband Description and Troubleshooting
Keypad
Faults
Page 2
Are the UI module
keys working?
YES
END
Page 50
Change keypad
module. Is it
NO
working?
Measure ROW0-4
signals between
UPP and keypad at
every dome key.
Are they ~1.8V?
Measure COL 1-5
signals between
UPP and keypad
on every outer
dome. Are they
Change the UPP
©2005 Nokia Corporation
YES
NO
Make sure there
are no shorts on
NO
YES
Make sure there
are no shorts on
NO
~1.8V?
YES
Company Confidential
Retest
Z2400. If OK,
change UPP.
Z2400. If OK,
change UPP.
Issue 1 03/2005