Hall Sensor - Nokia NHL-2NA Series Troubleshooting Instructions

NHL-2NA

Hall Sensor

There are two possible malfunction concerning the hall sensor: the output of the hall
sensor stays on high or low regardless the position of the magnet.
no position, test with
external magnet
6490201 does
indicator work
yes
Check that magnet
is in its place and it's as
effective as specified.
Check that N380
version is
Measure that N380
is properly soldered and
pin1~2.78V. Pin3 is down
when magnet isn't above
N380. Pin3~1.8V when
magnet is above it.
yes Change the N380 to
a new one and
Problem
solved
Page 6
Open grip
on service
OK?
no
OK?
yes
no Change the newer version
17
or newer
18
17
( etc.)
19
yes
yes
OK?
no
no
retest.
OK?
¤Nokia Corporation
CCS Technical Documentation
Phone gives an indicator
that grip is open / close
all the time
Assemble a new one
and retest.
and retest.
Change UPP_wd2,
OK?
no
Beyond of
economical
repair
Lock keys
indicator does
not show up
while pushing
grip to close
position
yes Problem
solved
Issue 1 07/02