Bedienungsanleitung Lowrance X-15B (Seite 7 von 12) (Englisch)

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wheels

by reversing

the

proce-

dure used to remove the old

one. BE SURE the

fingers

the new

stylus

are

pointed

UP.

6. Close the front of the case.

Latch both catches at the

top

of the unit.

MAINTENANCE

NOTE:

The

stylus may

damaged

if it is in front of the

pla-

ten when the

platen assembly

pulled

down.

Always

move the

stylus

to the back side of the

pla-

ten when

changing

the

paper

rolls. Remember to move the belt

down to remove the

stylus.

Black carbon dust is created dur-

ing

the

recording process.

Use a

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.

All mechanical

connections

should

be checked

periodically

be sure

they

haven't worked

loose.

HIGH VOLTAGE is

present

in the

transmitter section when the unit

is ON. No

attempt

should

made

by any

unauthorized

per-

son to

modify

repair

the elec-

tronic

section.

All electrical connections should

be checked

periodically

and

cleaned as

necessary.

The face of the

transducer,

mounted on

the transom should

be washed

periodically

with mild

soapy

water to remove

any

ac-

cumulated rod

grime

oily

film.

This

is essential to have

good

contact between the transducer

and the water.

DO SECTION

carry

spare fuse, stylus belt,

and roll of

paper.

Do use the

empty

cardboard core

from the last roll of

paper

on the

take-up post.

keep

the recorded

graphs

for

future reference.

-Do clean the

stylus belt, wheels,

and the rubber roller after

every

five rolls of

paper.

DON'T SECTION

DON'T OPEN THE CASE WHEN

THE UNIT IS ON.

Don't

pull

the

platen assembly

down when the

stylus

is at the

front.

Don't store

any objects

inside the

case or behind the

viewing

win-

dow.

(Except

for small

pieces

tape.)

Don't

forget

tape

the

papeito

the

take-up

core.

Don't rotate the

stylus

belt

up.

Don't use

oily cloths, strong

sol-

vents,

or abrasive cleansers.

TROUBLESHOOTING SECTION

Symptom

On/Off switch Is

"ON",

but the

stylus

and

paper

don't move.

What To Do

Check

fuse;

check connections

battery

for

tightness

and

corrosion.

Symptom

On/Off switch is

"ON",

have zero

mark,

but no echoes or bottom

signal.

What To Do

Be sure the transducer is

plugged

When

high Sensitivity settings

are

used,

a second bottom echo

will

appear.

This is normal and is

caused

the

returning signal

re-

flecting

off the surface of the

water,

making

a second

trip

to the

bottom and back.

If detailed information about

brush

piles,

individual

fish,

or the

thermocline is

desired,

the Sen-

sitivity

knob should be rotatedto

approximately

the

3/4

point.

Refer

to the illustration

below to see

,7't

—

SENSITIVITY: TOO LOW

what

effect

the

Sensitivity

control

setting

has on the recorded

information.

Recording

individual

fish with an

"arched"

signature

can

usually

accomplished

trolling speed

with

the

Sensitivity

knob at the ¾

point,

higher.

Refer to the

§ec-

tion "Arched

Signatures"

for more

information about this

important

function of

your

recorder.

Suppression

Control

The

Suppression

Control is

used to reduce interference from

noise.

Noise,

in electronic

terms,

any

undesired

signal.

It can

caused

electrical

source,

(such

the

engine's ignition sys-

tem)

air bubbles in disturbed

water which is call cavitation. In

both

cases,

the noise could

pro-

duce uhwanted marks

on the

paper.

(See

Figures

8.)

Fortunately,

noise

pulses

are rela-

tively

short in time

compared

real sonar

signals.

Advancing

the

Suppression

knob will cause

the

system

reject

these

unwanted,

short

pulses

without

reducing

the

Figure

SENSITIVITY: PROPER SETrING

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