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NHM–7
Troubleshooting Instructions
PAMS Technical Documentation
Page 22
Issue 1 10/2001
Nokia Corporation
No
Retest
Yes
Is UI module keys working ?
Try change UI module.
Is it working now ?
Keypad
faults 2
Measure ROW0,
ROW1, ROW2, ROW3,
ROW4 lines from X303.
Are they ~1.8V ?
Check ROW0 –
4 Lines, X303.
If OK change
Z301. If still fail
change UPP
No
Measure SLEEPX
signal from J403
when key is pressed.
Is it ~1.8V?
Yes
Check ROW0 –
4 Lines, X303.
If OK change
Z301. If still fail
change UPP
No
When keypad
is pressed, the led’s are
turned on ?
Yes
Display
faults
Yes
Check ROW0 –
4 Lines, X303.
If OK change
Z301. If still fail
change UPP
No
Keypad
faults 3
Yes
Check X303
No
Summary of Contents for NHM-7 series
Page 212: ......