Nokia 7088 Troubleshooting Manual page 42

7088 (Flower)
Base band Description and Troubleshooting
Keypad
Faults
Page 2
Are the keys
working?
YES
END
Page 42 © 2006 Nokia Corporation
Measure KYPD_(0,1,3,5,7)
signals between MSM6025
and keypad at every outer
NO
dome key. Are they ~ 2.9V?
YES
Measure
KYPD_(9,11,13,15,17)
signals between
MSM6025 and keypad
on every inner dome
Key. Are they about
0V?
YES
MSM6025 is defective,
phone can not be
repaired and must be
replaced
Check/change D350 and
Make sure there are no shorts
NO
MSM6025 is defective can
not be repaired and must be
Make sure there are no shorts
NO
on KYPD_(9,11,13,15,17)?
Check/change D352~D354(on
main board), then retest.
Company Confidential
D351.Then retest.
YES
on KYPD_(0,1,3,5,7)?
NO
replaced
NO
YES
Issue 1 12/2006