Keypad Problem - Nokia NHM-1 Series Troubleshooting Instructions

NHM-1
Troubleshooting instructions

Keypad problem

Continue
Is the UI-module
keys working?
End
Page 46
Try to change UI
PWB. Are the
No
keys working
now?
No
Check X166 (solder
Joints on engine)
Is it OK?
Yes
Measure Row0 – Row5
lines from X166. Are
voltage level ~1.8V?
Yes
Change to normal mode.
Measure SleepX-signal
From testpoint J405 when key is
pressed.
Is voltage ~1.8 V
Yes
is
When keypad
the
pressed, are
on?
LED's turned
No
Illumination
fault
Nokia Corporation.
CCS Technical Documentation
Retest failing
Yes
UI-module
Change X166
No
No
No
Change Tiku
Issue 1 11/03