INSTALLATION AND OPERATION MANUAL
MODEL
GRAPH RECORDER
X-1550
LITHO IN U.S.A. 988-0083-08
LOWRANCE
•
12000 E. SKELLY DR. TULSA, OKLA. 74128
ELECTRONICS,
INC.
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SUPPRESSION:
SENSITIVITY: ON
OFF
1/2
-
POSITION
(1
Il-i
NOTE POOR RECORD CAUSED
BY NOT USING SUPPRESSION
WHEN AT HIGH SPEED.
...-
— r
Figure
44
Speed (46 M.P.H.)
High
SUPPRESSION: ON — ADEQUATE SETTING
SENSITIVITY: ON
a
•
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•
¾ - .
—
-
.
1/2 POSITION
r
-
—
-
Figure
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'1
45
a.
RANGE: 0 TO 80 FEET
PULSE WIDTH: 100
SUPPRESSOR: MINIMUM
MICRO-SECONDS LINES: OFF
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21
Figure
46
Example:
Press:
LINES
SPECIFICATIONS — X-1550 GOT
Depth Ranges:
Feet, fathoms,
Operating Frequency:
50
second); accuracy
percent.
Pulse
(duration
(30-2000ps
Operating Voltage:
Minimum: 10
Maximum: 15 volts DC
Operating
0.7 to 1.8
printing density
power.
Output
1600 watts
(200
Weight:
8.5 lb.
Dimension:
With Gimbal Mount:
Width - 12¼"
Height
Depth
Width
Height
Deth
NOTICE
Periodically
Set the initial transmitter ducer Face with
width tolOO to remove
pulse
micro-seconds. collect. Oil and dirt on the face
1
together
kHz
Length:
then SCALES and
0, 0,
meters.
(50,000 cycles per
of
pulse): 200-l000gs
programable)
volts DC
Current:
amps depending
and
is within 0.6
on
output
will reduce
prevent sounding.
HELP!
If
sonar
chance to
for
repair.
Assistance can often be ex-
tended
Write or call one of our Authorized
Service Centers or the Lowrance
Electronics, Inc.,
vice
(Toll-free 1-800-331-3889).
Please detail the
are
partment may
the inconvenience of
Power:
watts
V
typical peak-to-peak.
RMS)
(3.9 Kg)
-
8%"
-
51/4"
,.
-
91/2"
-
71/2"
-
51/4"
wash the Trans- INSTRUMENT.
your
If it is determined that
must be
structions will be
SCHEMATIC DIAGRAM AND
PARTS LIST
Should
Diagram
Lowrance TRUELINE RECORD-
ER,
Lowrance
East
homa 74128. Be sure and
the Model Number and Serial
Number of
and water
soap
oil film that
any
sensitivity
or
A PROBLEM? LET US
have a
you
unit,
by telephone
Department
experiencing.
unit.
returned,
and Parts list for
send
Skelly
problem
please give
before
help
us
sending
or letter.
Customer Ser-
in
Tulsa,
problem you
Our Service De-
be able to save
returning
full
shipping
provided.
desire a Schematic
you
to PARTS
$1.00
Electronics,
Drive, Tulsa,
your
Inc.,
SONAR
may
may
with
a
OK.
your
your
LIST,
12000
OkIa-
give
even
your
it in
you
unit
in-
.
us
INDEX
Introduction 2
How It Works
Installation
j
Basic
Operation
Suppressor
Paper Speed
.
Limit
Paper
®
.
Graphs
GRAYLINE
Range
Lower Limit
Upper
Lines
Marker
Scale ....
End Of
How To Read
Paper Loading
Stylus Replacement
Dos and Donts
Troubleshooting
Advanced
Surface
ee,
Transmit and Print Alternate
Transmitter Pulse Width
Specifications
Service Information 22
Operation
Clarity
a
oms,
.
Control
e ers
(5CC)
2
3
4
5
6
6
7
7
8
8
8
9
9
10
10
14
16
16
16
16
7
17
17
21.
20
1
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I INTRODUCTION example,
The Lowrance X-1550 is a
highly sophisticated recording
sounder. Thanks to a mic-
depth
rocomputer,
more than
der in its
of the
to meet the
varying
depth
select the unit's
suppression
paper speed,
"Gray
recorded information: The
ented Lowrance variable
sion
system
false
signals
real
ones,
with
the
vide clear
tions. The
what
your
rolled and stored inside the case.
Small boat sonar
routinely
depth,
and locate fish. The
the X-1 550
ordinary.
Figure
Fish: 17 ft.
Depth:
the X-1 550 can do
other
any
price range.
changing
bottom
level,
is at
conditions,
system
and boat
and the
Line".used
your finger tips
speed.
sensitivity setting,
depth range,
to
enhance the
soun-
depth
Full control
demands of
water
You can
degree
of
pat-
not
without
but is
line
gray
signals
permanent
only
synchronized
function to
under all condi-
suppres-
filters out
distorting
record of
the
pro-
sonar has "seen" is
used to measure water
examine bottom
goes
Clues to the
1
35 Ft.
TRULINE RECORDER BOTH SEND AND
RECEIVED SIGNALS ARE INDICATED ON
systems
capability
far
beyond
composition
are
contours,
of
the
of the bottom are
of
bait fish are
from
solitary game
a
continuous
about bottom contours and sub-
merged shipwrecks
together
shown
separately
tions of
easily distinguished
display
than six inches can be
moss or
algae,
can be identified
speeds
monly
tic "arched"
tinguishes
roundings — layers
different
tected under
vertical movement of
down),
HOW
electronically regulated
drives a
the
paper.
tached to this belt. When the
stylus
small mark is made. This is called
the zero
surface of the water.
2 19
individual fish are com-
recorded with a characteris-
signature
them from their sur-
temperatures
good
can be shown.
IT WORKS
When the
right edge
unit
lightweight
of the
The
marking stylus
is at the
top
and
mark,
RECEIVES SIGNALS.
GRAPH PAPER.
—
given
fish
schools
—
there is
of information
—
fish closer
—
concentra-
plankton
—
at
trolling
which dis-
of water with
can be de-
conditions,
fish,
(up
turned
is
of the
on,
motor
belt located at
recording
is at-
paper
represents
and
or
an
a
the
set to 260
transmit
If
the LOWER LIMIT is set to
ts.
390
feet,
would be 390
pulse
from 600
initial
pulse
micro-seconds.
The
transmitter
be increased from the initial
at
time
any
pressor
maximum
added to the initial transmitter
width is
pulse
microseconds. In other
the LOWER LIMIT is set to 420
and the
feet,
trol is rotated to the maximum
the transmitter
ition,
would be 1220 micro-seconds.
initial + 800
(420
Earlier,
tionship
target separation.
increases,
resolution is
the
pulse
resolution becomes much
The X-1550 allows
advantage
it
possible
transmitter
from what the
selects
Limit.
according
The initial transmitter
width can be set from 30
2000
jis
keyboard
No other
can
today
After
setting
width,
pulse
trol can
noise
by increasing
width.
For
example,
with the LOWER LIMIT
the initial
feet,
pulse
width
would be
260
the initial transmit
Its. Finally,
feet and
width
remains at
pulse
by rotating
control clockwise. The
amount of
approximately
Suppressor
=
below,
width can
the
pulse
words,
pulse
1220.)
the
600
point
Sup-
width
800
con-
width
we talked about the rela-
between
target separation
degraded.
width
is
of this fact
width
pulse
As
pulse
However,
decreased,
better.
to take
you
by making
and
width
or
to override the initial
width
pulse
micro-computer
selling
to the Lower
pulse
to
ps
by entering
it on the
as shown below.
in
graph
give
the market
this feature.
you
the initial transmitter
pulse
initial
ts
con-
the
still be used to cancel out
suppressor
the
if a 50
transmitter
and the
tated to
pulse
turning
minimum will restore the unit to a
50
The X-1550 will
transmitter
tom of the
ride the
guish
width from the
on the
front of the
two will not be confused. For
if
example,
pulse
the
transmitter
pos-
displayed
depth
set the initial transmitter
width,
pulse
keyboard,
LINES and SCALES
if
same time.
and/or the scales were turned
this will turn them back on. To turn
them back off
the SCALES
independently.
simultaneously.)
This will override the micro-
computer's
initial transmitter
desired
initial transmit
this width will be
settings
trol is returned
computer.)
To return the unit to the control
of the
press
SCALES
This will
normal
width is
pulse
Suppressor
maximum,
width would be 850
the
Suppressor
transmitter
/.ts
pulse
paper
micro-computer.
control is ro-
the transmitter
control to
width.
pulse
display
width at the bot-
when
you
the initial transmitter
scale
depth
a zero is
paper,
pulse
a 100
width will be
paper
will be
simply press
width desired on the
setting. (Note:
j's
as 0100. A 50
pulse
as
0050,
displayed
and then
(Note:
again, press
key
Do not
selection and set the
pulse
printed
width so that the
transmitter
displayed
width would be
while a
as 50. To
pulse
the amount of
press
keys
If the lines
or the LINES
press
width to the
pulse
When an
width is
fixed for all
until
changed
or until con-
to the micro-
micro-computer, simply
0 and then the LINES and
at the same time.
keys
revert the
operation.
unit
back to
selected,
Re-
j's.
the initial
over-
To distin-
pulse.
printed
in
on
Its
50-foot
both the
at the
off,
either
key
them
set,
depth
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used on all the Lowrance's vari-
able
suppression
graphs. Basically,
principle
are of
the receiver circuit can be ad-
justed
long pulses,
will be cancelled
desired information
structure, etc.)
Of
width would have to be increased
that most noise
relatively
so that it will
course,
flashers and
it works on the
short duration. It
then the short
out,
will be
the transmitter's
pulses
accept only
and
(fish, bottom,
displayed.
pulses
only
pulse
at the same time so that the return
echoes would be
receiver.
This is
rance
exactly
suppression system
The transmitter's
creased
pression
'tracks" the amount of increased
pulse
narrow noise
ing only
fish or the
ceiver
at all
system
to
when the
creased. A 200
ond)
by
control,
width,
the return echoes from
bottom,
sensitivity
this
by
The
only disadvantage
is
resolution,
separate targets,
pulse
transmitter
on the X-1550 when
turned
display
only
words,
graph paper, they
two
transmitter is
crease the transmitter
to 400
same two fish arches will blend
together
on,
6 inches
if two fish that are six
inches
ps pulse
pressor
apart
separate
Ps, (by rotating
two fish or
width.
control
and show
accepted by
what the Low-
does.
width is in-
pulse
the front
cancelling
pulses,
panel sup-
and the receiver
out
any
and
display-
etc.
(Note:
is not diminished
process.)
to this
or the
ability
is diminished
width is in-
ps (micro-sec-
width used
pulse
power
will allow the unit to
targets
In other
apart.
are
displayed
will show
arches when the
operating
Now,
clockwise)
up
is first
that are
on the
up
with a 200
if we in-
width
pulse
the
Sup-
those
as one
Re-
fish
the
the
as
or
possibly
paper.
With a 400
width,
have to be at least 12 inches
before
separate
This is
the
Suppressor
even a "blob" on the
transmit
tts
those same two fish will
will show
they
arches on the
it is
why
important
control turned
down to minimum when
for fish.
However,
to have
noise is not a concern. When
using
easier for the unit to
longer pulse
bottom or from
called
tion." The
being
turning
minished because the
sound
weaker it becomes.
the
pulse
larger signal
is easier
For this
puter
increases the initial
the unit as
set
by
pulse
the unit when the
control is turned to
it is
helpful
longer pulse
a sonar in
deeper water,
coming
the fish. This is
"Probability
probability
of Echo
able to detect
from
pulse
width,
water is di-
deep
has to
travel,
By broadening
in
essence,
is
transmitted and it
for the receiver to detect it.
reason,
in the X-1550
deeper
the
operator. (Note:
width is the
the microcom-
automatically
pulse
lower limIts are
pulse
Suppressor
minimum.)
TRANSMIT
LOWER PULSE
LIMIT
(Feet) (Micro-seconds)
10 110
20 130
30
40-200 200
From
210 feet to 600
the initial
the
18
same rate as the
width increases at
pulse
pulse
apart
as two
up
graph.
to leave
looking
sometimes
widths when
it is
detect a
back from the
Detec-
of the unit
an echo re-
further the
the
a
width of
Initial
width of
INITIAL
WIDTH
160
feet,
depth.
For
GRAPH
PAPER
The
2
stylus
the
edge
pulse
the
water,
detected,
of
the
continues to move
of the
paper
is
traveling
and when an
the
stylus
paper.
which reflected
object
Figure
down
the sound
through
echo is
another mark on the
depth
the echo can be read in feet
comparing
paper
on the
A variable
the
paper
treated so that the
it
to leave a
mark.) During
the
stylus
will be made
but the
amount before the next revolution.
Each mark
before,
ture" of
one
tiny
Due to the
this unit
operation
its location on the
to the
paper.
graph. (The paper
depth
speed
scale
motor drives
stylus
permanent
one revolution of
a
belt,
by
will move a small
paper
will blend into the one
so that a
the
target
mark at
many
we have
has,
section of this manual
narrow mark
very
the flexible
composite "pic-
will be
a time.
features that
split
black
into two sections. The first sec-
Section
tion,
Operation"
that is
0
of situations. It will tell
absolutely necessary
use the X-1 550 is a wide
is entitled "Basic
III,
and covers
everything
you
use the basic controls — Sen-
sitivity, Suppressor, Paper Speed,
Grayline, Range, plus
a few
cial functions.
-—----
PAPER
TRAVEL
while
makes
The
by
printed
is
will burn
stylus,
made,
the
to
variety
how to
spe-
QJ—PULLEV
This section will be
for most situations.
once
sic
scribed in Section
wish to
described in Section VI — Ad-
vanced
will
have mastered the ba-
you
operation
explain
of the X-1 550 as de-
some of the features
try
Operation.
four other features
adequate
However,
III,
you may
This
chapter
that will enable the serious
to
operator
out of this
We
urge you
ual
thoroughly
yourself
though
unit,
the
and the front
Should
please phone
vice
1-800-331-3889.
dents call collect - 1-918-437-
6881).
be
II INSTALLATION
Mounting
stalled in
provided
the best
in the bracket base allow wood
screw or bolt
stiffener
this is a
it is
power
you require
Department
A service
happy
The
depth
the maximum use
get
equipment.
to read this man-
and familiarize
with the controls. Al-
advanced
very
easy
of the
to
panel
thanks to
use,
microcomputer
controls.
extra
help,
our Customer Ser-
toll free at
(Oklahoma
to
—
any
the unit can be tilted for
representative
help you.
sounder
convenient
viewing angle.
mounting.
be
may
required
resi-
be in-
may
area,
Four holes
A wood
on the
3
will
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back of thin
support
fiberglass panels
the X-1550.
If the desired location is closer
than 18:: to a
a trial run
the unit
that the
affected.
Figure
BE SURE to insert
ber
grommets
The
larger
of
grommet goes
gimbal
wiched between
and sonar instrument
The
ings).
tion to hold the unit at
angle.
Power Connections
Twelve volt
sounder should be
depth
the
by
tem. The
tached to an
buss,
with
boat's 12-volt electrical
but
electrical
magnetic compass,
should be made with
in
operation
compass readings
to be sure
3
the two rub-
on
side
bracket so that it
grommets provide
power
if
gimbal
(larger
on inside of
gimbal
DC
power
cable
accessory
have
you
interference,
diameter)
(see
the desired
—
may
problems
cable should be attached
to the
battery.
If a
longer
ordinary
at
any
Figure
cable is
#18
hardware or electronic
lamp
required,
cord available
4
are not
bracket.
is sand-
bracket
draw-
fric-
for the
supplied
be at-
or
power
the
directly
to
sys-
use
sup-
Ground
(Negative)
4
store.
ply
dered. If this can't be
crimp-type splices. Tape
with
Splices
electrical
should
tape.
be sol-
done,
all
use
splices
An in-line fuse holder with fuse
is
supplied
certain to install this fuse holder
as close to the
possible.
the sonar unit and the
cable in the event a short occurs.
Crimp
attach the fuse holder to the
power
wire in the
positive
is the
The
cidental
damage
reversed. The unit
however,
is
applied.
Ill
BASIC OPERATION
On-off and
Rotate the On/Off knob
to turn the unit on. The
knob works much like the
control on a
signals
higher settings
cruising:
just simple
mation is
setting
or over
(which produce
setting
with the X-1550. Be
source as
power
This will
connectors are
cable. The red or white
power
conductor. The black wire
ground
graph
polarity
will
protect
cable is the
conductor.
is
protected
reversals and no
occur if the wires are
will not
until the
will be detected with
proper polarity
Sensitivity
that
radio,
both
power
supplied
from ac-
operate,
Control
clockwise
Sensitivity
volume
weaker
is,
of the knob. When
or at
other times when
bottom-contour infor-
desired,
can be low. In
soft,
will have to be
the
Sensitivity
water
deep
muddy bottoms,
weak
echoes),
higher.
to
—
the
be
mediately
amount
the
clutter, as fish
eliminated also.
To turn the 5CC
press 0,
value
(1, 2,
or turned OFF
Feet, Fathoms,
The X-15 will
in
feet, fathoms,
though
seen. Use
of SCC
MARK/SCC. The SCC
or
required
signals
function
can be
3)
at
any
time.
Meters
display
or meters.
the unit will revert back to
the feet mode whenever
is turned
to
any
1 and 3 for
fathoms,
These
simultaneously
work.
When the unit is in the
mode,
played
paper every
Fathom mode two U's will be dis-
played.
it is
off,
mode
and 7 and 9 for meters.
keys
you
—
feet
must be
simple
wish
4 and 6 for
pressed
for this feature to
only
one
U
will
at the bottom of the
few inches. In the
Three
L's
will be
the
only
to reduce
can be
OFF,
changed
the
depth
Al-
power
to
change
by pressing
Feet
be dis-
chart
printed
on the Meter mode.
Example: Display
Press: 7 and 9
Result:
El 0—
-
LI
Figure
,8
-
12
-
-
lb
Meters
simultaneously
41
—
—
2
-
lb
20—
13y looking
U
one can determine the
's,
depth display
in, i.e.,
Ii
or Meters
U,
Transmit and Print Alternate
When
at the number of
mode that the unit is
Feet
-
U
Fathoms
,
-
I.! U U.
-
the X-1 550 is first turned
the Transmit and
on,
nate function is
This causes
ically.
on
print
every
enabled automat-
the
other revolution
and the transmitter is
on
gered
This
accomplishes
1. Since the
other
ery
corded information is not
squeezed together
small area. This allows better
records at slower
speeds.
bers are
are more
they
per speed
slightly.
2.
Prevents the
'wrap
desirable
second or
printed
or middle
times this can
fish or other
wish to see.
and
3. Reduces the
47.)
fect. This
lower
frequency units,
though
show
up
graphs.
To disable the Transmit and
Print
Alternate
UPPER LIMITand LOWER LIMIT
—
keys
simultaneously.
to turn
—
ply press
LOWER LIMIT
the function back
will cause
on
print
speeds
every
the
Transmit Pulse
The noise
in the X-1 550 is a
width discrimination
and is the
circuit,
17
other revolution.
every
Also,
spread
three
stylus only prints
revolution,
the scale num-
out
legible.
is also slowed down
around". This is the un-
possibility
occurrence of the
third bottom echo
on the
it does
paper
of the
page. Many
interfere with
targets
(See
reverberation ef-
happens
sometimes
on
high
frequency
mode,
the UPPER LIMIT and
keys again.
the unit to transmit and
stylus
paper
up slightly.
Width
suppression
patented pulse
suppression
same as the one
Print Alter-
to
stylus
also
trig-
things:
ev-
the re-
into a
very
paper
so
more,
The
pa-
of
at the
top
that
you
Figures
mainly
46
on
al-
the
press
If
wish
you
sim-
on,
This
rotation and
system
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should be set at about
mounted on the transom should
be washed
soapy
cumulated road
This is essential to have
contact between the transducer
and the water.
Periodically,
the
paper
with a cloth
cohol,
the drive shaft.
Figure 29).
DO SECTION
Do
belt,
Do use the
or
paper
spool.
Do use the
core from the last roll of
the
take-up post.
Do
on the
Do
periodically
water to remove
grime
the rubber roller on
should
drive
dampened
to
improve
(See page 16,
carry a spare
and roll of
paper.
tape
to attach it to the
empty
a
carry
keep
pencil
paper.
the recorded
with
mild
ac-
any
or
film.
oily
good
be cleaned
with al-
the friction on
fuse,
sty/us
from a new roll
take-up
cardboard
paper
to make
notes
graphs
for future reference.
Do clean the
wheels with alcohol after
five rolls of
DON'T SECTION
DON'T OPEN
WHEN THE UNIT IS ON.
Don't
down when the
front.
Don't store
pull
paper.
the
any objects
the case or behind the
door.
Don't
the
take-up
Don't rotate the
Don't use
vents or abrasive
TROUBLESHOOTING
forget
core.
oily
to
Symptom
On/Off
stylus
switch is
and
paper
What To Do
Check
fuse;
check
belt and
stylus
every
THE.CASE
platen assembly
is at the
stylus
inside
viewing
the
tape
stylus
cloths,
cleansers.
strong
ON",
paper
belt
up.
but the
don't move.
connections
at
battery; tighten power
connector,
Symptom
On/Off
zero
tom
switch is
mark,
signals.
but no echoes or bot-
What To Do
Be sure the transducer is
plugged
transducer is in contact with the
water.
into the unit and the
Symptom
The unit is
ON,
not move.
What To Do
Tape Paper
on
take-up post.
to cardboard
Symptom
Recorder marks are faint or dim.
What To Do
on
Clean
stylus;
viewing door; replace
check
battery
Sympton
Recorded marks are
heavy; paper
is torn
What To Do
Bend the
duce
stylus slightly
pressure
on
VI ADVANCED OPERATION
Surface
The surface
of the chart
extend
face. This often interferes with the
Clarity
markings
paper
feet below the sur-
many
area that one is
Surface clutter is caused
to
sol-
and
plankton,
wave action or boat
by
or
fish,
duced or eliminated
temperature
surface
The
MARK/SCC
To use the
for minimum
mediate
elimination of surface
then
press
air bubbles created
clutter can be re-
key
SCC, control,
effect,
control,
MARK/SCC. A reduc-
tion of the surface clutter
16
cord
have
'ON",
but
connections.
paper
very
does
spool
the
by stylus.
to re-
paper.
Control
can,
trying
at the
at
to
graph.
(SCC)
top
times,
by algae
wakes,
inversions.
by
using
on the control
2
for an inter-
bait
the
panel.
press
or 3 for maximum
clutter,
and
will im-
Figure
are
will
caused
flecting
ter,
bottom and back.
brush
thermocline is
I
1
Figure
6
When
high Sensitivity settings
a second bottom echo
used,
appear.
making
When detailed information
This is normal and is
the
by
off the surface of
piles,
,
7 SENSITIVITY: TOO Low
returning signal
a second
individual fish
desired,
12
the wa-
to the
trip
or the
the Sen-
re-
about
Figure
5
knob
sitivity
¾
below to see what effect the Sen-
sitivity setting
information.
Recording
"arched"
accomplished
with the
point,
tion "Arched
10 for more information about this
important
recorder.
Suppression
The
used to reduce interference
noise.
is
caused
(such
tem),
Refer to the illustration
point.
Sensitivity
or
higher.
Suppression
Noise,
undesired
any
by
as the
or
by
has on the recorded
individual fish with an
signature
can
at
trolling speed
usually
knob at the 3/4
Refer to the sec-
Signatures,"
function of
your
Control
Control is
in electronic
signal.
an electrical
engine's
It can be
source,
ignition sys-
air bubbles in dis-
on
page
from
terms,
be
turbed water which is called cavi-
tation noise. In both
noise could
marks on the
44
&
45.) Fortunately,
are
relatively
pared
vancing
cause the
unwanted,
reducing
This
produce
paper. (See Figure
short in time com-
to real sonar
the
Suppression
system
short
the
patented design
8
to
pulses
sensitivity
cases,
signals.
SENSITIVITY:
PROPER SETTiNG
the
unwanted
noise
pulses
Ad-
knob will
these
reject
without
in
any way.
is exclu-
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sive with Lowrance.
high suppression settings,
record becomes coarse and
graph
the
bottom or from other fish will be
decreased.
Therefore,
sion
the knob
chart
deep
the
speed
necessary
unwanted noise marks. Most of
to
ability
the lower the
setting,
setting only
paper
water. The
where the
points
of the
to remove the
separate
(See Figure
the better. Advance
when
paper
the time at low or
no
suppression
Paper
the chart
graphs,
depths,
trol
For best
maximum.
Speed
This knob
adjusts
paper
in shallow to medium
turn the
to at least 3/4 when
up
details,
This
fish arches at low
keeps high speed
compressed. The paper
being
speed
when
This
pearing
microcomputer
should be turned down
the unit in
using
will
prevent gaps
in the
slow the maximum
However;
fish from the
as far as
operating
chart below
maximum
is slowed.
trolling speeds,
will be needed.
Control
the
For
good
paper speed
turn it
will
show
speeds
information from
deep
from
record.
will
In
automatically
speed
the
10.)
suppres-
in
gives
erratic,
speed
detailed
trolling.
to
up
proper
and
water.
ap-
fact,
of the
with
of
con-
the
RANGE PAPER
10'-120' 1 Fastest
130'-510' 2 Medium fast
SPEED STYLUS
paper
speed
paper speed
520-830' 3 Medium slow
paper speed
Below
840'
The chart
10 SUPPRESSION: TOO HIGH
igure
even further
paper speed
gaps appear
the
paper speed
record is achieved. The
speed may
not
looking
conserve
4
Slowest
speed
paper may
by adjusting
control.
in
the
record,
down until a
also be
for fish or to
paper.
paper
be slowed
the
Remember;
turn
paper
slowed when
simply
GRAYLINE On/Off Knob
The GRAYLINE® function can be
used to outline the bottom contour
which
Leneath
also
give
otherwise be hidden
might
trees and
clues-to the
brush;
it can
composition
of the bottom. A hard bottom re-
turns a
a
weedy
signal
narrow
the
6
very strong signal causing
wide
control too far or
line. A
gray
bottom returns a weaker
which is
line. Do not advance
gray
soft,
emphasized
it will
muddy
gray
solid
or
with a
BELT
REPLACEMENT
CAUTION
present
when the
1. TURN
—
High voltage
is
in the electronic section
unit is turned on.
THE UNIT OFF.
2. Release both catches on the
of the case.
top
down on the
front to
3. The
wheels located at the
edge
Refer to
Move the front of the belt
DOWN to
expose
stylus
of the
Figure
at the center of the
4.
the belt at the
Grasp
with the thumb and
holder
forefinger
to the left while
belt off the wheels with the
other
forefinger. (See Figure
40.)
5. Position
wheels
cedure used to remove the
the new belt on the
by reversing
old one. BE SURE the
of the new
if
UP.
6. Close the front of the case.
Latch both catches on the
of the unit.
MAINTENANCE
NOTE: The
if it is in front of the
aged
when the
pulled
stylus
platen
rolls. Remember
down to remove
Black carbon dust is created
during
a
soft,
viewing
hind the
compressed
blow dust out of the case and
away
platen
down.
A/ways
the back side of the
to
when
changing
the
recording process.
oil-free
door and metal
paper
air
from
moving parts
Pull out and
of the case
top
the
belt rides over two
platen assembly.
2 on
position
and move it
stylus
stylus
the
pushing
are
may
assembly
move
the
stylus
right
page
stylus
platen.
stylus
gently
the
the
pro-
fingers
pointed
be dam-
platen
is
the
paper
belt.
to move the belt
stylus.
Use
to clean the
rag
Low
may
platen
pressure
be used to
if the air
3.
- —
Figure
is
the
rides on should be
with a soft
40
and free of oil.
dry
After
every
stylus
five rolls of
belt and the wheels it
moistened with al-
rag
cohol to remove carbon dust.
Strong
solvents or abrasive clean-
ers should not be used.
All mechanical
should be checked
be sure
bricant to the motors or
top
running
damp
cumulations, dust,
all that's
they
DO NOT
DO NOT wash the unit with
water.
cloth to remove salt ac-
necessary.
HIGH VOLTAGE is
qonnections
haven't worked
apply any type
Wiping
the transmitter section when the
unit is ON. No
made
by any
to
modify
section.
Corrosion
power plug,
cord
power
be-
connections. All electrical
tery
connections should be checked
periodically
necessary.
The face of the
15
attempt
unauthorized
or
repair
occur at the
may
in the fuse holder or
splices,
and cleaned as
transducer;
(A
T
paper;
clean
wiped
periodically
gear
loose.
lu-
of
trains.
to
it with a
or road
the electronic
grime
present
in
should be
person
or at the bat-
if
is
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STYLUS REPLACEMENT
CAUTION
present
—
High voltage
in the electronic section
when the unit is turned on.
1. TURN
2. Release both catches
3. The
4.
the old
5. Before
Figure
______
THE UNIT OFF.
of the case.
top
down on the
front to
(See Figure 36.)
stylus
wheels located
of the
edge
Move the
DOWN to
at the center
the
Hold
with one
left
edge
from under
stylus
stylus,
37
I
top
expose
belt rides over two
platen assembly.
front of the belt
position
of the
stylus
finger,
stylus by starting
and
moving
the tabs on the
holder.
installing
be sure it is bent
'qI' ''"'r.-
on the
Pull out and
of the case
the
stylus
at the
right
the
stylus
platen.
belt
stationary
and remove
it out
the new
is
belt.
at its
prop-
erly by comparing
6. Refer to
the new
correctly
Figure
stylus
under the tabs on
the holder. Be sure
in the two slots. If
freely
bend the
edge
stylus away
it is
rubbing
does move
7. After
installing,
won't
print
the
paper, (See
the
bend
that more
against
plate.
all the
the stainless
If it still does not
way,
all the
right leg
pressure
down more
into
the
it
digs
freely.
it to
38 to
is
positioned
it moves
on until it
if the
way
Figure
down so
is exerted
bend the
not so far that
(but
paper).
Figure
be sure
not,
from the
stylus
down
39)
steel
print
left
leg
8. Close the front of the case.
Latch both catches
on the
of the case.
II.
Iiri
top
37.
12
-
fl:,'
A-
Figure
line on the
showing
the
RANGE
line
range
depth
We
carefully
your
Lower Limit
1550,
Figure
11 GRAYLINE OFF'
target completely,
target
no
difficult to see.
black,
which makes
The Lowrance X-1 550
has the most advanced
graph
selection
sounder in its
urge you
to
X-1550.
When
you
the
13
S
12
SM
Sb
40
capability
to read this section
the most out of
get
first turn on the X-
will be 0-60 feet.
range
straight
of
any
price range.
-S
2
24
36
40
bIJ L
Figure
The
Figure
—32
—40 49
—
—EO—---—--L
12
Press: 8 0 LOWER LIMIT
will then be
depth
14
U
lb lb
bH
Any depth
10, 20, 30, 150, 320,
(i.e.
be used as a lower limit at
may
in a
GRAYLINE
multiple
the bottom of the chart
Example: Display
Press: 1 9 0
Result:
—
Figure
S
0-190
15
I
:
displayed:
S
22
of ten
etc.)
paper.
feet.
LOWER
LIMIT
ON"
30
—
—
—
lS2
—
0
IRS
As
descend below 60 feet. To
change
press
Keyboard,
LOWER LIMIT.
Example: Display
14 7
travel,
you
to a
the desired
the bottom
deeper range, simply
and then
depth
press
0-80
may
on the
feet.
—20
—
lb lb
—
114 li-I
—.
52
IRS
0
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range
before
press
slows
0
Note that the
down
automatically
setting
-
Clear
the LOWER
hitting
paper speed
at this
To clear an
key,
entry
four times. The desired numbers
then be re-entered.
may
UPPER LIMIT
times when
Many
it is desirable to "blow
ing,
expand
neath
by
a section of the water be-
This is made
you.
the X-1550 to show
are fish-
you
possible
segments
up"
or
of the underwater world on the
graph paper. By using
PER LIMIT
tiples
key, any depth
of 10
may
the TOP of the chart
Example:
Press:
Result:
•
20
-96
-
LILt
-52
-60 U
Notice: No surface
displayed.
Example: Display
Press:
Result:
These
various combinations to show
segments
bottom. See
pIes
Display
2 0 UPPER
Figure
4 0 UPPER
Figure
ranges
from the surface to the
of
representative
segments
the UP-
in mul-
be
displayed
paper.
20-60 feet.
16
-
signal
40 to 60
17
can be used in
on
page
at
LIMIT
20
52
U—ba-
will
be
feet.
LIMIT
sam-
23.
Figure
-
-
-
-92
—bD U U —bO
settings
LOWER LIMIT
Your
printed
change
LINES
on,
the
the Lines
key.
-
press
Example:
-
17
'-ID
H'-I
'-lB
If
wish to
you
at
display your depth
time,
any
simply press
or UPPER LIMIT
will
range
on
the
When the X-1 550 is first turned
depth
paper.
To turn the Lines back
the Lines
Press: Lines
Result:
immediately
the
paper.
depth setting.
lines will be
If
desire to turn
you
off,
Figure
the LINES
press
key again.
18
be
This will not
printed
on,
-ID
Lie
92
Lb
on
-
—
—
—
-
-
Figure
a
31
-
2
24
be
96
Figure
33
96
48 48
60 U 60
Marker
A marker is included in the
X-1 550 so that events
8 13
may
Figure
34
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used in this unit.
small
(Hint:
of
tape may
inside
9. Hold the
the
turn
wise to
tension on
be
snug
(See
10. Push
back to its
Be sure
inside
(See
11. Close the front of
strips
be stored
housing.)
take-up spool,
supply spool
a small amount
put
the
paper.
against
Figure 33.)
the
it
the
Figure 34.)
the
platen assembly
operating position.
engages
of the case.
top
Latch both catches on the
of the case.
12. Turn the
Chart
clockwise.
long enough
moving smoothly
across the
flutters or
hill',
repeat
(See Figure 35.)
unit on. Move the
Speed
knob
Watch the
to be sure it is
platen.
begins
Step
and
clock-
It should
platen.
the catch
the case.
fully
paper
and
evenly
If
the
paper
to run
8.
top
up-
of
marked when desired. To use the
MARK/
marker,
SCC
be
page.
simply
and a vertical line will
key
displayed
Hold
across
the MARK/SCC
down and the unit will
vertical line for as
press
long
the
the entire
key
the
print
as the
key
is held down.
Example:
Press: MARK
Result:
-o
2H
bO
Figure
19
Scale
The numbers that indicate the
or scale
depth
desired.
once will
scale numbers. The scale
displayed again by pressing
SCALE
displayed
either the LOWER LIMIT or the
UPPER LIMIT
Example:
Pressing
stop
key.
Remember,
at
any
Press: SCALE
Result:
Figure
be deleted if
may
the SCALE
the
printing
the scale
time
key.
20
key
of the
may
the
be
may
by pressing
End-of-Paper
The
X-1 550 has a red line
graph paper
the bottom of the
when there is
Marker
paper
2 to 3 feet
only
fore the end of the
_________
Figure
Zero
an electronic zero
This allows
printing
lus wear or chart
ment. To
zero,
driver into the
and rotate it clockwise
be
movement and counterclockwise
for downward movement.
until
the same distance from
of
screwdriver
slot as this could cause
to
Figure
21
Adjustment
Your X-1550 is
equipped
adjustment.
to center the
you
when it shifts due-to
paper align-
the electronic
insert a /o
the
the
paper.
adjust
top
slotted screw-
potentiometer
and bottom lines are
Caution: Do not force
into the
unit.
your
22
used in the
to
signify
with
at
be-
sty-
printed
paper.
2
slot
for
upward
Adjust
the
edge
or
jam
potentiometer
damage
Figure
30
12 U
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IV
HOW TO READ GRAPHS
"Arched
A remarkable
Signatures"
advantage
of the
X-1550 is that it can record indi-
vidual fish with a characteristic
arched mark that
from their
stationary surroundings.
The reason for this
low. The distance to a fish when it
moves into the sonar's cone of
sound is shown as "A"
When the fish has
to the center of the
tance to it will be
and as it moves out
"B"),
the distance will increase
cone,
as shown in line "C".
again
If
a
partial
23
Figure
the time on
curves
down),
ducer is not aimed
Sharp,
will occur most often
Sensitivity
point
23).
must be
the fish and boat to
arched mark.
but
up
it is because the trans-
well-defined
knob is set at the
or
higher. (See (A), Figure
Remember,
some movement between
separates
is shown be-
moved
cone,
shorter, (line
arch occurs most of
unit
your
does not curve back
(the
straight
when the
that there
too,
develop
them
inFigure22.
the
dis-
of the
mark
down.
signatures
¾
the
Thermoclines
The
lake is seldom
temperature
of water in the
constant from
top
to bottom.
temperatures
Layers
tion of a warm and cool
of different
form,
and the
layer
junc-
water is called a thermocline. The
and thickness of the ther-
depth
mocline can
or time of
may
depths.
day.
be two or
Thermoclines are
with the season
vary
In
deep
at different
more,
lakes there
impor-
tant to the fisherman because
are areas which fish are active.
times bait fish will be above
Many
the thermocline while
fish
suspend just
(B), Figure
Your Lowrance Model X-1550
can detect
the
water,
will
probably
¾
point,
23.)
this invisible
but the
have to be
or
higher
larger game
below it.
(See
layer
Sensitivity
set at the
V PAPER LOADING
CAUTION
present
when the unit is turned on.
1. TURN
2.
Release both catches on the
top
down on the
front to
sembly. (See Figure 25.)
3. Move the
(on
10
—
in the electronic
High voltage
section
THE UNIT OFF.
of the case. Pull out and
of the case
top
the
platen
belt
stylus
DOWN,
side of the view-
the
expose
right
of
they
in
knob
is
as-
ing area),
marking stylus
side of the
move the
may
26)
to
belt
be
damaged. (see
SPECIAL NOTE:
be
may
sembly
stylus
damaged
is
pulled
has been moved to
back side of the
position
platen.
if the
down
platen.
on
the back
NEVER
—
up
The
platen
unless the
the
the
stylus
4. Pull out and down on the
at the
assembly
spools.
5.
To remove the full
push
paper
snaps
The roll can
removed from the
end
6. Remove the
core from
same manner.
7. Put a fresh roll of
position
posts
caps
of the
paper
tom of the rolL
8. Draw the end of the
across the face pf the
around the
and
tape
take-up
Roll several inches of
32.)
the
paper
before
core into the
the two notches in the core
with the tabs on the
take-up spool. (See
Push the
30.)
knob in and rotate it until it
locks into
NOTE: Both LPG-604 and
LPG 605 chart
center of the
top,
to
expose
the
(See Figure 27.)
take-up roll,
in and rotate the left
retainer knob until it
out.
(See Figure 28.)
now be
easily
paper spool
caps. (See Figure
empty supply
the
right
side in the
paper
on the
of the
on the
platen assembly.
must
centering
paper spool
supply
spool
side
off the bot-
(See Figure 31.)
paper
platen,
metering
it
squarely
core.
(See Figure
around
installing
roller,
to the
the core
the
take-up
transport.
lower
Figure
retainer
paper
place.
can be
paper
stylus
Figure
the
tab
platen
paper
29.)
in
end
(right)
The
Align
as-
Figure
11
27
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