Manual Lowrance X-1550 (page 8 of 12) (English)

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sive with Lowrance.

However;

with

RANGE PAPER

SPEED STYLUS

BELT

REPLACEMENT

high suppression settings,

the

graph

record becomes coarse and

the

ability

separate

fish from the

bottom or from other fish will be

decreased.

(See Figure

10.)

Therefore,

the lower the

suppres-

sion

setting,

the better. Advance

the knob

setting only

as far as

chart

paper

when

operating

deep

water. The

chart below

gives

the

points

where the

maximum

speed

of the

paper

is slowed.

necessary

to remove the

erratic,

unwanted noise marks. Most of

the time at low or

trolling speeds,

suppression

will be needed.

Paper

Speed

Control

This knob

adjusts

the

speed

the chart

paper

For

good

detailed

graphs,

in shallow to medium

depths,

turn the

paper speed

con-

trol

to at least 3/4 when

trolling.

For best

details,

turn it

maximum.

This

will

show

proper

fish arches at low

speeds

and

keeps high speed

information from

being

compressed. The paper

speed

should be turned down

when

using

the unit in

deep

water.

This

will

prevent gaps

from

ap-

pearing

in the

record.

fact,

the

microcomputer

will

automatically

slow the maximum

speed

of the

even further

by adjusting

the

paper speed

control.

Remember;

gaps appear

the

record,

turn

the

paper speed

down until a

solid

record is achieved. The

paper

speed may

also be

slowed when

not

looking

for fish or to

simply

conserve

paper.

GRAYLINE On/Off Knob

The GRAYLINE® function can be

used to outline the bottom contour

which

might

otherwise be hidden

Leneath

trees and

brush;

it can

also

give

clues-to the

composition

of the bottom. A hard bottom re-

turns a

very strong signal causing

wide

gray

line. A

soft,

muddy

weedy

bottom returns a weaker

signal

which is

emphasized

with a

narrow

gray

line. Do not advance

the

control too far or

it will

gray

CAUTION

—

High voltage

present

in the electronic section

when the

unit is turned on.

1. TURN

THE UNIT OFF.

2. Release both catches on the

top

of the case.

Pull out and

down on the

top

of the case

front to

expose

the

stylus

belt.

3. The

stylus

belt rides over two

wheels located at the

right

edge

of the

platen assembly.

Refer to

Figure

2 on

page

Move the front of the belt

DOWN to

position

the

stylus

at the center of the

platen.

Grasp

the belt at the

stylus

holder

with the thumb and

forefinger

and move it

gently

to the left while

pushing

the

belt off the wheels with the

other

forefinger. (See Figure

40.)

5. Position

the new belt on the

wheels

by reversing

the

pro-

cedure used to remove the

old one. BE SURE the

fingers

of the new

stylus

are

pointed

6. Close the front of the case.

Latch both catches on the

top

of the unit.

MAINTENANCE

NOTE: The

stylus

may

be dam-

aged

if it is in front of the

platen

when the

platen

assembly

pulled

down.

A/ways

move

the

stylus

the back side of the

platen

when

changing

the

paper

rolls. Remember

to move the belt

down to remove

stylus.

Black carbon dust is created

during

the

recording process.

Use

soft,

oil-free

rag

to clean the

viewing

door and metal

platen

be-

hind the

paper

Low

pressure

compressed

air

may

be used to

blow dust out of the case and

away

from

moving parts

if the air

dry

and free of oil.

After

every

five rolls of

paper;

the

stylus

belt and the wheels it

rides on should be

wiped

clean

with a soft

rag

moistened with al-

cohol to remove carbon dust.

Strong

solvents or abrasive clean-

ers should not be used.

All mechanical

qonnections

should be checked

periodically

be sure

they

haven't worked

loose.

DO NOT

apply any type

lu-

bricant to the motors or

gear

trains.

DO NOT wash the unit with

running

water.

Wiping

it with a

damp

cloth to remove salt ac-

cumulations, dust,

or road

grime

all that's

necessary.

HIGH VOLTAGE is

present

the transmitter section when the

unit is ON. No

attempt

should be

made

by any

unauthorized

person

modify

repair

the electronic

section.

Corrosion

may

occur at the

power plug,

in the fuse holder or

power

cord

splices,

or at the bat-

tery

connections. All electrical

connections should be checked

periodically

and cleaned as

necessary.

The face of the

transducer;

10'-120' 1 Fastest

paper

speed

130'-510' 2 Medium fast

paper speed

520-830' 3 Medium slow

paper speed

Below

840'

Slowest

paper

speed

The chart

paper may

be slowed

- —

Figure

igure

10 SUPPRESSION: TOO HIGH

UP.

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Lowrance X-1550 Manual

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