Ui Modules - Nokia RH-27 Series Technical Documentation Manual

RH-27
Troubleshooting - Baseband

UI modules

Keypad
faults,
page 2
Are UI modules keys
working?
YES
END
Page 54
Change keypads
NO
Measure ROW0-4
(P10-P15) signals
between UPP and
Measure COL1-4
(P01-P04) signals
between UPP and
©2003 Nokia Corporation
CCS Technical Documentation
module. Is it
YES
working?
NO
NO
X301. Are they
~1.8V?
YES
NO
X302. Are they
~1.8V?
YES
Confidential
Retest
Make sure there are
no shorts on Z300. If
OK, change UPP
Change Z300
Make sure there are
no shorts on Z300. If
OK, change UPP
Issue 1 11/2003