LENCO L-78 Manual de usuario

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Hi-Fi

Record

Player

L78

Operating

instructions

Features

The

Lenco

L

78

Record

player

is

a

precision

instru-

ment

of

true

Hi-Fi

quality

which

will

satisfy

even

the

most

demanding

music

lover.

The

instrument

can

be

used

for

stereo

as

well

as

monophonic

listening.

The

usual

speeds

of

167/s,

331/3,

45

and

78

RPM

can

be

pre-set

in

click-stops

and

the

speed

can

also

be

varied

continuously

from

30—86

RPM.

The

light

tonearm

of

the

L

78

is

a

first-class

example

of

fine

mechanical

precision,

and

guarantees

clear,

undistorted

sound

reproduction,

with

the

greatest

possible

protection

for

your

records.

The

tonearm

is

lowered

onto

the

record

by

a

hydraulically

dam-

ped

lowering

device

—

thereby

eliminating

the

pos-

sibility

of

record

or

needles

being

damaged

whilst

putting

the

tonearm

onto

the

record.

The

unit

is

SEV,

DEMKO,

NEMKO,

SEMKO

and

CSA

tested

and

approved.

Technical

Description

The

very

silent

4-pole

motor

(44)

is

spring

mounted

onto

a

rigid

steel

baseplate.

The

dynamically

ba-

lanced

turntable

is

made

of

die-cast

zinc,

and

weighs

4

kg.

The

power

is

transmitted

from

the

conical

motor

shaft

(43)

to

the

turntable

by

a

rubber

covered

idler

wheel

(41).

The

speed

is

changed

by

moving

the

idler

wheel

on

the

motor

shaft.

The

miniature

ball-bearings

fitted

into

the

tonearm

allow

for

a

free

sideways

movement,

and

the

knife-

edge

bearing

keeps

friction

to

a

minimum.

An

adjustable

sliding

weight

(5)

enables

one

to

set

the

stylus

pressure

exactly

to

suit

the

cartridge

being

used.

An

automatic

brake

(23)

comes

into

operation

when

the

turntable

is

switched

off.

All

tonearms

can

be

supplied

with

the

anti-skating

device

(3,

28,

29).

Every

L78

is

supplied

with

a

centre

piece

for

re-

cords

with

a

large

centre

hole,

a

stroboscope

disc

for

exact

setting

of

speed,

a

stylus-adjusting

gauge

for

accurate

setting

of

stylus

overhang,

a

set

of

shock-absorbing

mounting

supports

and

a

cut

ou!

template

(only

required

for

chassis

model).

Unpacking

the

L

78

When

unpacking

check

for

possible

damage.

The

L78

is

toroughly

checked

and

tested

before

leav

ing

the

factory.

Any

damage

which

may

have

beer

caused

during

transport

should

be

reported

imme-

diately.

In

this

connection

we

would

like

to

point

out

tha!

the

upper

part

of

the

knife-edge

balance

has

been

put

into

the

lower

part,

i.

e.

it

is

held

there

only

by

the

weight

of

the

arm.

The

resulting

movemen'

which

can

be

felt

just

above

pedesta!

spindle

when

lifting

the

arm,

is

a

normal

and

necessary

feature

of

this

type

of

bearing

and

should

not

be

mistaken

for

a

fault

or

damage.

Preparation

for

Use

The

L78

is

available

on

a

wooden

base,

or

as

a

build-in

model.

To

avoid

damage

of

the

turntable

spindle

during

transportation,

the

turntable

is

packed

separately

in

a

cardboard

sieeve.

Models

mounted

on

a

wooden

base

are

delivered

fully

assembled

and

can

therefore

be

operated

without

any

difficulty.

The

build-in

model

must

be

assembled

on

the

spot,

and

the

instructions

on

the

cut out

template

should

be

carefully

followed.

On

all

models

the

spring-mounted

motor

(44)

has

beer

secured

for

transit.

This

has

been

done

by

means

of

two

red

securing

screws

(18)

on

the

baseplate

under

the

turntable

and

these

should

be

losened

until

the

motor

is

freely

sprung.

The

L78

is

de-

signed

for

use

with

220

V

50

Hz.

A

C

mains

but

can

be

supplied

with

a

switchable

motor

for

use

on

115,

145

and

225

V

mains.

To

ensure

perfect

running,

important

bearing

and

driving

points

should

be

cleaned

if

necessary

be-

fore

putting

on

the

turntable.

The

important

points

are:

Turntable

spindle,

underside

of

turntable,

mo-

tor

shaft

and

the

rubber

surface

of

the

idler

whee

(41).

A

clean,

dry,

non-fluffy

cloth

should

be

used

for

cleaning.

Only

if

oil

or

grease

spots

are

present

should

the

cloth

be

sparingly sprinkled

with

methy-

lated

spirits

or

carbon

tetrachloride.

(Benzine

musi

not

be

used.)

The

turntable

should

now

be

placed

on

the

spindle

and

the

rubber

mat

on

the

turntable.

Push

the

large,

counterweight

(1)

on

to

the

rear

end

(30)

of

the

pick-up.

Interchangeable

Plug-in

Heads

The

L

78

is

usually

supplied

with

an

empty

plug-in

head,

so

that

each

user

may

select

his

own

pick-up

cartridge.

The

empty

plug-in

head

(11)

is

complete

with

mounting

screws

for

the

popular,

Internation-

ally

standard

cartridges.

If

various

cartridges

are

selected

(e.

g.

to

play

older

78

rpm

shellac

records),

we

suggest

that

a

separate

plug-in

head

is

pur-

chased

for

each

one

to

facilitate

the

change

from

one

cartridge

to

another.

Assembling

of

the

Cartridge

into

the

Plug-in

Head

The

cartridge

should

be

mounted

onto

the

mounting

plate

with

the

assembly

material

provided.

The

plug-in

head

should

then

be

put

onto

the

tone-

arm

and

secured

by

knurled

ring

(10).

Place

the

semi-circular

cut

out

in

the

template

round

the

pedestal

of

the

pick-up

arm

and

the

hole

A

over

the

centre

spindle

of

the

turntable.

Withdraw

the

tonearm

from

the

securing

clip

(9)

push

it

towards

the

centre

of

the

turntable

and

lay

it

gently

on

the

cardboard.

Loosen

screw

(14)

on

pick-up

the

head

(11).

Slide

the

small

mounting

plate

with

the

cartridge

in

the

plug-in

head,

until

the

point

of

the

needle

is

di-

rectly

on

the

black

line

of

the

setting

gauge,

tighten

the

screw

(14).

Remove

plug-in

head

from

tonearm

and

connect

pick-up

leads

to

cartridge.

Right

channel:

R

=

red

Right

earth

channel:

GR

green

Left

channel:

L

white

Left

earth

channel:

GL

=

blue

Put

the

plug-in

head

onto

the

tonearm

again

and

secure

with

ring

(10).

Mounting

Material

2

screws

0.118

inches

long

2

screws

0.314

inches

long

2

screws

0.374

inches

long

2

screws

0.5

inches

long

2

distances

bushes

0.137

inches

long

2

mounting

screws

Setting

of

Stylus

Pressure

Setting

of

the

stylus

pressure

is

achieved

by

means

of

the

two

weights

(1,

5)

at

the

rear

end

of

the

tone-

arm.

The

large

weight

(1)

is

used

to

balance

out

the

tonearm,

whilst

the

small

weight

(5)

is

used

to

set

the

stylus

pressure.

1.

Place

the

small

weight

right

at

the

back

of

the

outrider.

2.

Balance

out

the

tonearm

by

moving

the

large

weight

(1)

along

the

rear

end

of

the

arm

until

the

arm

floats

parallel

to

the

record.

3.

The

recommended

stylus

pressure

for

the

parti-

cular

cartridge

being

used

is

then

set

with

the

small

weight

(5).

Stylus

pressure

is

increased

by

moving

the

weight

forward

from

its

null

point

at

the

end

of

the

outrider.

Each

notch

on

the

out-

rider

represents

0.5

P.

(P

=

pond

which

is

equi-

valent

to

grams).

in

order

to

minimise

distortion

we

suggest

that

too

low

stylus

pressures

be

avoi-

ded.

We

recommend

that

the

stylus

pressure

be

set

to

about

20

%

below

the

maximum

pressure

advised

by

the

manufacturer

of

the

particular

cartridge

being

used.

Extremely

low

stylus

pres-

sures

should

also

be

avoided

in

order

to

reduce

record

wear,

as

such

low

pressures

tend

to

cause

the

stylus

to

rattle

in

the

record

groove,

thus

causing

unnecessary

record

wear.

Table

1

of

this

instruction

booklet

contains

details

of

the

best

stylus

pressures

and

details

of

the

styl-

us

dimensions

of

a

range

of

pick-up

cartridges.

To

set

the

Arm

Lifting

Device

1.

Place

a

record

onto

the

turntable.

2.

Move

the

tonearm

gently

by

hand

until

the

needle

of

the

cartridge

is

just

above

the

first

groove

of

the

record.

3.

Move

the

arm-lifting

device

(8)

forward.

4.

Turn

screw

(25)

on arm-lifting

device

until

the

distance

between

it

and

the

rubber

nipple

on

the

tonearm

is

about

2

mm.

5.

Place

the

pick-up

arm

on

to

the

pick-up

rest

(9).

The

needle

of

the

cartridge

must

not

touch

the

On/Off

switch

(12).

If

necessary

adjust

the

height

of

the

pick-up

rest

by

loosening

the

screw

in

the

bush

at

its

base.

Electrical

Connection

The

shielded

pick-up

cable

(37)

is

próvided

with

a

standard

plug

which

can

be

connected

to a

loud-

speaker

or

radio.

This

connection

is

indicated

as

«GRAMMO»,

«TA»,

«PICK-UK»

or

«Q»

on

the

radio.

Later

models

of

amplifiers

or

radios

of

European

origin

have

been

fitted

with

a

standard

socket

which

fits

the

L78.

To

connect

to

other

or

older

models

with

different

sockets

a

shielded

interme-

diate

cable

should

be

used.

When

the

unit

has

been

connected

(38)

to

the

electric

mains

it

is

ready

for

use.

Antl-Skating

Device

Modern

pick-up

design

for

geometrical

reasons

re-

sults

in

a

force

being

imparted

on

to

the

stylus

of

the

pick-up

cartridge

by

the

record,

which

pulls

it

towards

the

centre

of

the

record.

This

force

is

cal-

led

skating

force.

Its

effect,

especially

with

low

sty-

lus

pressures,

is

to

cause

the

stylus

to

jump

seve-

tal

grooves

when

the

arm

is

set

on

to

the

record.

The

different

pressures

on

the

two

sides

of

the

groove

caused

by

the

skating

force

also

introduce

a

certain

amount

of

distortion.

This

distortion,

as

well

as

the

jumping

of

the

stylus,

can

be

avoided

when

the

skating

force

is

compensated

for.

For

this

reason

an

anti-skating

device

is

supplied

with

the

L78

Arm.

Heavy

Type.

Assembly

of

the

anti-skating

device

on

tonearm:

Notches

Fig.

1

Press

bent

steel

rod

(3)

in

hole

«A»

on

top

of

tone-

arm.

Fig.

2

Push

semi-circular

clamp

(29)

on

tonearm

support

«B»

as

per

drawing.

The

pip

on

the

semi-circular

clamp

must

locate

into

the

hole

on

the

tonearm

support.

Setting

of

the

Anti-Skating

Device

Before

setting

the

anti-skating

device,

check

that

the

arm

has

been

correctly

set

as

described

earlier.

Setting

of

the

correct

anti-skating

force

depends

on

two

factors,

namely

a)

the

stylus

pressure,

b)

ihe

tn

radius

of

the

stylus

of

the

cartridge

being

used.

Two

separate

anti-skating

weights

are

supplied

with

the

L

78,

namely

a

1

g

and

a

4

g

weight.

A

list

of

settings

for

all

stylus

pressures

and

tip

radii

is

shown

in

Table

2

on

the

last

page.

Example

To

set

the

anti-skating

force

for

a

cartridge

for

which

the

recommended

stylus

pressure

is

1.5

pond,

and

of

which

the

stylus

has

a

tip

radius

of

18

mu.

(.0007"'),

Table

2

shows

that

for

a

stylus

pressure

of

1.5

pond

and

stylus

tip

radius

of

.0007"

the

1

g

weight

should

be

used

on

Notch

6.

Therefore

hang

the

1

g

weight

(28)

over

Notch

6

passing

the

thread

over

the

adjacent

hollow

in

the

cork-screw

(29)

so

that

it

hangs

freely.

Anti-skating

Cartridge

s

bias

notch

ADC

220

(rot)

ADC

990

XE

Shure

M

75

MB

II

Goldring

800

Lenco

M

94

Playing

of

Records

1.

Set

the

speed

change

lever

to

the

desired

speed

and

check

that

it

is

properly

engaged.

Every

long

playing

record

has

its

speed

33'/⁄3

or

45

clearly

shown.

2.

Move

the

ON/OFF

knob

(12)

from

the

OFF

posi-

tion

to

the

ON

position

and

the

turntable

wil

start

to

revolve.

3.

Piace

the

pick-up

arm

on

to

the

lifting

arm

sc

that

the

stylus

point

is

above

the

run-in

groove

of

the

record.

4.

Move

the

arm

lift

lever

(8)

forwards

and

the

pick-

up

arm

will

automatically

be

lowered

on

to

the

record.

In

order

to

play

records

with

large

cen

tre

hole,

use

the

adaptor

supplied

for

the

pur

pose.

5.

The

turntable

L78

has

an

automatic

stop

com.

bined

with

an

automatic

lift

of

the

pick-up

at

the

end

of

the

record,

as

long

as

the

knob

at

the

rear

adjacent

to

the

pick-up

pedestal

is

set

tc

“automatic”,

6.

If

this

automatic

facility

is

not

required,

such

as

for

playing

language

courses,

set

the

knob

tc

"MAN"

(manual).

At

the

end

of

the

record,

move

the

arm

lift

lever

(8)

backwards

and

the

pick-up

will

lift

off

the

record.

Turn

the

ON/OFF

knot

(12)

from

ON

to

OFF,

and

the

unit

will

be

switch-

ed

off.

Replace

the

pick-up

arm

on

the

pick-up

rest

Should

you

wish

to

interrupt

the

record

during

playing,

proceed

as

described

in

6

above.

Checking

and

Adjusting

the

Turntable

Speed

1.

Place

the

stroboscope

{round

aluminium

disc

with

three

rings

of

dark

and

light

stripes),

that

is

provided

with

each

unit,

on

the

turntable.

2.

Start

the

motor

and

illuminate

the

stroboscope

with

a

light

from

a

lamp

connected

to

the

mains

It

is

suggested

that

the

room

be

darkened

to

facilitate

the

setting.

If

the

speed

setting

of

the

speed

control

lever

is

correct,

then

all

the

dark

lines

on

the

ring

for

the

corresponding

speed

or

the

stroboscope

will

appear

to

stand

still.

if

how

ever

they

move,

then

it

is

a

sign

that

the

speec

setting

has

altered.

The

speed

can

easily

be

cor-

rected

by

lifting

the

speed

control

lever

out

o

its

catch

and

moving

it

slightly

to

either

right

or

left.

When

the

speed

is

correct

the

stripes

on

the

stroboscope

will

appear

to

stand

still.

If

an

inten-

tional

deviation

from

the

pre-set

speed

is

requi-

red

(e.

g.

if

a

musical

instrument

is

being

played

and

the

pitch

of

the

record

is

to

be

adjusted

to

that

oí

the

instrument),

then

the

speed

can

be

altered

in

the

same

way.

If

the

speed

is

to

be

re-

set,

i.

e.

a

re-adjustment

of

the

catch

for

the

cor-

responding

speed

is

required,

then

the

following

procedure

should

be

adopted:

a)

Loosen

slightly

(not

more

than

two

turns)

the

screw

at

the

side

of

the

corresponding

catch

b)

Set

the

speed

change

lever

in

the

catch

and

adjust

the

speed

until

the

correct

speed

is

reached.

c)

Carefully

lift

the

speed

change

lever

out

of

the

catch

without

altering

the

position

of

the

catch,

and

re-tighten

the

screw.

Maintenance

of

Your

Record

Player

The

bearings

built

into

the

unit

are

self-lubricating

and

require

no

further

attention.

22

23

2425

26

27

28 29

30

|

N

1

Gegengewicht

2

Schraube

für

Gegengewicht

3

Bügel

für

Antiskating

4 Flansch

5

Gewicht

für

Auflagedruck

6

Schraube

für

Auflagegewicht

7

Skala

für

Auflagedruck

8

Armlifthebel

9

Tonarmstütze

10

Rändelmutter

11

Ansteckkopf

12

Schalter

Ein—Aus

13

Griff

zu

Ansteckkopf

14

Befestigungsschraube

für

Montageplattchen

15

Tourenzahlgestänge

16

Fúhrungshebel

17

Tourenzahlregulierhebel

18

Motor-Transportsicherungs-

schrauben

19

Zwischenradfeder

20

Blindschraube

(LENCOCLEAN)

21

Sperrhebel

22

Halter

mit

Blattfeder

23

Schieber

mit

Bremsgummi

24

Schalthebel

zu

Abstell-

automatik

25

Rändelschraube

zum

Ein-

stellen

des

Armhebers

26

Arretierknopf

für

Umstellung

manual—automatic

27

Armheber

28

Antiskatinggewicht

29

Halter

für

Antiskating

30

Federnde

Führungsachse

31

Kipphebel

zu

Ein—Aus-

Schalter

32

Support

komplett

33

Armhebekurve

34

Kipphebel

fúr

Armheber

35

Pick-up-Hebel

36

Arretierhebel

37

Tonarmkabel

38

Netzkabel

39

Netzschalter

40

Transportsicherung

41

Zwischenrad

42

Viskositätsgedämpfte

Federaufhängung

43

Konische

Motorwelle

44

Motor

45

Spannungswähler

46

Tellerachslager

47

Schaltstange

zu

Ein—Aus-

Schalter

1

Contrepoids

2

Vis

pour

contrepoids

3

Support

pour

anti-skating

4

Collier

5

Poids

pour

le

réglage

de

la

force

d'appul

6

Vis

pour

le

poids

pour

réglage

de

la

force

d'apul

7

Bras

gradué

pour

la

force

d'appul

8

Levier

du

löve-bras

9

Support

du

bras

10

Collier

de

fixation

de

la

coquille

11

Coquille

amovible

12

Manette

de

mise

en

marche

13

Manette

de

la

coquille

14

Vis

de

montage

pour

la

plaquette

de

la

coquille

15

Coulisseau

du

changement

de

la

vitesse

16

Barre

de

guidage

17

Levier

de

changement

de

vitesse

18

Vis

de

sécurité

19

Essort

20

Ecrou

borgne

pour

LENCOCLEAN

21

Levier

de

bloquage

22

Support

avec

ressort

á

lames

23

Verrou

avec

suppresseuse

gommés

24

Levier

d'arrêt

automatique

25

Molette

pour

le

réglage

du

lóve-bras

26

Manette

pour

le

changement

manuel-automatique

27

Leve-bras

28

Poids

de

compensation

29

Support

d'anti-skating

30

Axe

guide á

ressort

de

torsion

31

Culbuteur

pour

interrupteur

ON/OFF

32

Support

complet

33

Mécanisme

du

lóve-bras

34

Culbuteur

pour

léve-bras

35

Levier

36

Levier

d'arrét

37

Cáble

du

pick-up

38

Cordon

secteur

39

Interrupteur

réseau

40

Sécurité

de

transport

41

Poulie

Intermediaire

42

Ressorts

de

suspension

á

amortissement

visquex

43

Axe

conique

du

moteur

44

Moteur

45

Changement

de

tension

46

Roulement

d'axe

du

plateau

47

Levier

pour

interrupteur

ON/OFF

1

Counterweight

2

Screw

for

counterweight

3

Steel

for

antiskating

4

Pedestal

base

5

Weight

for

adjustable

stylus

pressure

6

Screw

for

pressure

weight

7

Calibrated

stylus

pressure

bar

8

Arm-lifting

lever

9

Pick-up

rest

10

Knurled

ring

to

secure

plug-in

head

11

Plug-in

head

12

ON/OFF

switch

13

Handle

of

plug-in

head

14

Fixing

screw

for

adjustable

cartridge

mounting

platform

15

Speed

regulating

mecanism

16

Guide-lever

17

Speed

regulating

lever

18

Transit

safety

screws

19

Idler

wheel

spring

20

Hole

for

LENCOCLEAN

spindle

21

Blocking

lever

22

Clamp

with

laminated

spring

23

Slider

with

suppressor

rubbe

24

Switch-lever

for

shut-off

switch

25

Knurled

screw

for

lowering

arm

26

To

stop

knob

to

switch

over

MANUAL

-

AUTOMATIC

27

Pick-up

lowering

arm

28

Antiskating

weight

29

Support

for

antiskating

device

30

Rear

end

of

the

pick-up

31

Toggle

for

ON/OFF

switch

32

Support

complet

33

Hydraulic

mecanism

for

lowering

arm

34

Toggle

for

lowering

arm

35

Pick-up

lowering

38

To

stop

lever

37

Pick-up

cabie

38

Mains

cable

39

Mains

switch

40

Transit

safety

41

Idler

Wheel

42

Viscously

damped

spring

mounting

43

Conical

motor

shaft

44

Motor

45

Voltage

selector

46

Turntable

spindie

bearing

47

Switch

road

for

ON/OFF

switch

Motvikt

Skruv

för

motvikt

Bygel

fór

antiskating

Fláns

Vikt fór

náltryck

Skruv

fór

náltrycksvikt

Skala

för

náltryck

Spak

för

tonarmslyft

Tonarmstöd

Kantmutter

Pickuphus

Strömbrytare

tili-frän

Handtag

för

pickuphus

14

Fästskruv

för

montageplatta

Varvtalsförare

Overféringsarm

Varvtalsreglage

Motor-transportsákrings-

skruvar

19

Mellanhjulsfjäder

20

Blindskruv

(fór

LENCOCLEAN)

21

Spárrarm

22

Hällare

med

bladfjäder

23

Förskjutningsarm

med

bromsgummi

24

Brytararm

till

stoppautomatik

25

Reglerskruv

för

inställning

av

armlyft

26

Omkopplare

för

manuell-

automatstopp

=

Sonnoaunun-

sob

de

ei

Dä

dde

NDT