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POWER
CONNECTIONS
Twelve volt DC
power
should be
supplied by
the boat's electrical
system.
The
power
cable
may
be
attached to an
accessory
or
power
buss,
but if
you
have
problems
with electrical
interference
(random
dots or
lines that
show whenever the boat's
engine
or other
accessory
is
on),
the cable
should be attached
directly
to the
battery.
The
power
cable has two
wires,
red for the
positive
lead and black
is
ground
or
negative.
An in-line fuse holder
containing
a 3
amp
fuse is
supplied
with the X-3.
This should be attached
to the red wire on the
power
cable with the
crimp
connector. The
other end of the fuse holder
should be attached
to the
battery
or
accessory
buss.
If
the cable is not
long enough, splice
ordinary
#18
lamp
cord to reach.
Just be certain that
the fuse holder is
as close to the
power
source
(battery
or
accessory
buss)
as
possible.
This will
protect
the
power
cable and
unit
in
the event
of a short The X-3 is
protected
from accidental
polarity
reversals and will
not be harmed if the
wires are reversed.
(However,
the unit
will not work
until the
proper polarity
is
applied.)
Electrical noise
picked up
by
the
power
cable can be
minimized
by
rout-
ing
it
away
from other
possible
sources of electrical
interference. One of
the
largest
noise
generators
is the
engine's wiring
harness that
runs from
the
engine
to the boat's
instrument
panel.
This harness
usually
contains a
wire for the tachometer which
radiates RF
(radio frequency)
energy.
For
the
best
results,
keep
the
power
and transducer
cables
away
from the
engine
wiring. Bilge pumps
are also
noisy,
so
try
to
keep
the
X-3's cables
away
from
them,
too.
VHF
radio antenna's coax cable
radiate RF
energy
at
higher power
levels
than even
the
engines wiring
hamess. It is
very important
to
keep
the
X-3's
power
and transducer cables as far
away
as
possible
from the VHF
radio's
antenna cable.
HOW TO
OBTAIN
SERVICE
If
you
have a
problem
with
your
sonar
unit,
please give
us a chance to
help
before
sending
it in for
repair.
Assistance can
often be extended
by telephone
or letter. Write or
call one
of our
Authorized Service Centers or the
Lowrance Customer Service
Department
in
Tulsa,
OK.
If
you
live out of
the state of
Oklahoma,
call 1
-800-331-3889,
toIl free.
If
you
live in the
state of
Oklahoma,
call collect
918-437-6881.
Please detail the
problem
you
are
experiencing.
Our
Service
Department
may
be able to save
you
the inconvenience of
returning your
unit.
If it
is determined that
your
unit must be
returned,
full
shipping
instruc-
tions will be
provided.
SCHEMATIC
DIAGRAM AND
PARTS LIST
Should
you
desire
a schematic and
parts
list for
your
Lowrance
sonar,
send
$1.00
to the
address below and it will be mailed
to
you promptly.
Please be sure and
give
us the model and serial
number of
your
Lowrance sonar unit
Mail To:
Lowrance Electronics
12000 E.
Skelly
Dr.
Tulsa,
Oklahoma 74128
3
32
Figure
1
Ground
N
eq
alive)
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