Keyboard - Nokia NHL-2NA Series Troubleshooting Instructions

CCS Technical Documentation

Keyboard

If the Grip keyboard does not work, follow the troubleshooting path in the flowchart
below.
Keyboard
malfunction
Run Phoenix
keyboard test and check if
there was dirt under the
keydome or keypads?
no
Measure J005, J009, J012,
J013, J014, J015, J016 and
J022 that they short circuit
only when specified keys
are pressed.
Did they short circuited?
no
Change the
Grip-module
Issue 1 07/02
yes Clear pads,
change the
keymat and
.
retest
Check
yes Connectors that yes
their contacts are
ok,
no
Repair them and
yes
change if
necessary, retest.
Problem
solved
¤Nokia Corporation
Beyond of no
economical
repair
Check
Flex-cable between yes
grip and transceiver
unit,
OK?
no
no
Change the yes
Flex cable
and retest,
OK?
NHL-2NA
Problem
solved
yes
Change
UPP_wd2
and retest,
OK?
yes
Check
EMI-filter Z384
is it physically
damaged.
OK?
no
Change EMI- no
filter and
retest,
OK?
Page 5