Keypad Faults - Nokia NSB-9 Series Troubleshooting Instructions

NSB-9
Troubleshooting Instructions

Keypad faults

Keypad
faults
Is the power
key working?
Yes
Keypad
faults 2
Page 72
Measure voltage
No
from S336. Is it
Yes
Measure
Yes
voltage from
S336 when
key is pressed.
Is it high?
No
Phone
is
jammed
Nokia Corporation
CCS Technical Documentation
No
high?
Check S336.
Is it OK?
No
Change S336
Check R317,
C311, S336 and
line.
If OK change
UEM.
Yes
Phone
is dead
Issue 1 04/03