CCS Technical Documentation
Troubleshooting Instructions
NSB-9
Issue 1 04/03
Nokia Corporation
Page 73
Are flip T9
keys
working?
Keypad
faults 2
Keypad
faults 3
Check flip poco pins,
engine contact pads.
and spring contacts
between A-cover and
engine module. Are
they OK?
Measure Flip VBAT
voltage between J301
and J307 (Should be
same as engine
VBAT voltage).
Change flip. Is it OK
now?
Yes
No
Measure voltage
levels from flip data
(J303) and clock
(J305). Is it ~1.8V
Check with
oscilloscope that data
is flowing, data shape
and levels are OK.
Retest
Yes
Yes
Yes
Change defected part,
either flip or A-cover.
Retest
Flip
faults 1
Yes
No
No
No
No
Yes
No
Check
R300, R302,
Z300, genio17/18 lines
and R319 pull-up to VIO
(~1.8V). If ok change
UPP