Service manual
Commercial
in
confidence
SMARTFIND
NAVTEX
service
manual
Page
10
1.
4
Soft
keys.
Used
to
select
various
menus
and
options.
The
function
of
each
is
displayed
on
the
screen
next
to
the
key.
2.
Display
key.
Press
and
release
to
control
the
back
light.
Press
and
hold
to
control
the
contrast
and
brightness
of
the
display.
Also
used
to
switch
between
day
and
night
mode.
3.
Cursor
key
(Up/Down)
used
to
navigate
the
display
and
to
control
brightness
when
the
display
key
pressed.
4.
Cursor
key
(Left/Right)
used
to
navigate
the
display
and
to
control
contrast
when
the
display
key
pressed.
5.
SMARTFIND
GMDSS
NAVTEX
Status
LED.
Indicates
unit
is
booting
up,
Alarm
activation,
messages
etc…
6.
Enter
Key.
Used
to
confirm
data
entries,
Acknowledge
incoming
messages,
Press
and
hold
to
enter
engineering
service
mode.
You
will
be
prompted
for
a
password
which
is
SERVICE.
Use
the
cursor
key
pad
to
move
around
the
onscreen
keyboard.
3.2.
Functional
test
It
is
recommended
that
the
unit
is
set
up
with
an
active
antenna
and
tested
to
ensure
that
messages
are
received
on
all
channels
and
decoded
correctly.
Alternatively
a
PC
can
be
set
up
with
a
signal
generator
to
test
the
receivers.
Please
see
the
following
page.
An
external
GPS
and
printer
used
to
test
the
two
data
communications
ports
(COM1
&
COM2).
The
following
should
be
checked:
i
Check
receiver
operates
OK
on
all
3
channels
i
Check
basic
controls
i
Check
LCD
contrast
and
brightness
–
ensure
LCD
temp
does
not
exceed
+70C
(
back
light
life
rating
is
20,000
hours
continuous
operation).
i
Check
time
and
date
(note
that
there
is
no
back
up
battery
in
the
SMARTFIND
NAVTEX,
therefore
the
time
and
date
will
be
incorrect
after
a
power
cycle)
i
Ensure
data
ports
COM1
&
COM2
operate
correctly
The
following
section
shows
an
example
of
a
test
setup
which
can
be
used
to
simulate
NAVTEX
messages
(example
is
for
518kHz).
Caution:
12VDC
is
present
on
antenna
connector
whenever
antenna
power
is
“enabled”
in
the
setup
menu.
Care
should
therefore
be
taken
when
connecting
to
external
test
equipment
that
can
be
damaged
by
DC
voltage
across
its
input.
If
in
any
doubt,
set
antenna
power
to
“disabled”
before
making
the
connection.