Pioneer PL-470 User manual

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Operating

:

STEREO

TURNTABLE

PL-470

Instructions

Thank

you

for

buying

this

Pioneer

product.

Please

read

through

these

operating

instructions

so

you

will

know

how

to

operate

your

model

properly.

After

you

have

finished

reading

the

instructions,

put

them away

in

a

safe

place

for

future

reference.

In

some

countries

of

regions,

the

shape

of

the

power

plug

and

power

outlet

may

sometimes

differ

from

that

shown

in

the

explanatory

drawings.

However,

the

method

of

connecting

and

operating

the

unit

is

the

same.

LINE

VOLTAGE

SELECTOR

SWITCH

Only

multi-voltage

models

are

provided

with

this

switch.

U.S.,

Canadian,

European,

U.K.,

and

Australian

models

are

not

provided

with

this

switch.

The

line

voltage

selector

switch

is

located

on

the

top

of

the

cabinet

of

this

turntable.

Before

your

turntable

is

shipped

from

the

factory,

the

switch

is

set

to

the

power

requirements

of

the

turntable’s

destination.

Check

that

it

is

set

properly

before

WARNING:

to

prevent

Fine

OR

SHOCK

HAZARD.

DO

NOT

EXPOSE

THIS

APPLIANCE

TO

RAIN

OR

MOISTURE.

IMPORTANT

NOTICE

[For

U.S.

and

Canadian

models]

The

serial

number

for

this

equipment

is

located

on

the

rear

panel.

Please

write

this

serial

number

on

your

enclosed

war-

ranty

card

and

keep

in

a

secure

area.

This

is

for

your

security.

“This

product

is

manufactured

to

comply

with

the

radio

in-

terference

requirements

of

EEC

Directive

76/889/EEC

and

82/499/

EEC.”

plugging

the

power

cord

into

the

outlet.

If

the

voltage

is

not

properly

set

or

if

you

move

to

an

area

where

the

voltage

re-

quirements

differ,

adjust

the

selector

switch

as

follows:

@

Use

a

medium-sized

screwdriver,

Insert

the

tip

of

the

screwdriver

into

the

groove

of

the

selector

switch

and

turn

it

so

that

the

power

voitage

marking

of

your

area

points

to

the

arrow.

YQ

PIONEER’

SAFETY

INSTRUCTIONS

READ

INSTRUCTIONS

-

All

the

safety

and

‘operating

instructions

should

be

read

before

he

appliance

is

operated.

RETAIN

INSTRUCTIONS

-

The

operating

inst:

tions

should

be

retained

for

tuture

ceference.

HEED

WARNING

—

Ail

warnings

on

the

appliance

and

in

the

operating

instructions

should

be

adhered

to.

FOLLOW

INSTRUCTIONS

—

All

operating

and

use

instructions

should

be

foltowed

WATER

AND

MOISTURE

—

The

appliance

should

not

be

used

near

water

—

for

example,

near

a

bathtub,

washbow!,

kitchen

sink,

laundry

tub,

in

a

wet

basement,

or

near

a

swimming

pool.

etc

LOCATION

—

The

appliance

should

be

installed

in

a

stable

location.

WALL

OR

CEILING

MOUNTING

—

The

appliance

should

not

be

mounted

to

a

wall

or

ceiling.

VENTILATION

~

The

appliance

should

be

situated

so

that

its

lacation

or

position

does

not

interfere

with

its

proper

ventilation.

For

example,

the

appliance

should

not

be

situated

on

a

bed,

sofa,

rug,

or

similar

surface

that

may

block

the

ventilation

apen-

ings;

or,

placed

in

a

built-in

installation,

such

as

a

bookcase

or

cabinet

that

may

impede

the

flow

of

air

through

the

ventilation

openings.

HEAT

—

The

appliance

should

be

situated

away

from

heat

sources

such

as

radiators,

heat

registers,

stoves,

or

other

appliances

(including

amplifiers!

that

produce

heat.

POWER

SOURCES

—

The

appliance

should

be

con-

nected

to

a

power

supply

only

of

the

type

describ-

ed

in

the

operating

instructions

or

as

marked

on

the

appliance

POWER-CORD

PROTECTION

—

Power-supply

cords

should

be

routed

so

that

they

are

not

likely

to

be

walked

on

or

pinched

by

items

placed

upon

or

against

them,

paying

particular

attention

to

cords

at

plugs,

convenience

receptacles,

and

the

point

where

they

exit

from

the

appilance.

POLARIZATION

..

If

your

purchased

product

is

pro-

vided

with

4

polarized

power

plug,

please

read

the

following

instructions.

This

product

is

equipped

with

4

polarized

alternating

current

fine

plug

(a

plug

having

one

blade

wider

than

the

other).

This

plug

will

fit

mito

the

power

outlet

only

one

way.

This

1s

3

safety

feature

if

you

are

unable

to

insert

the

plug

fully

vito

the

outlet,

try

reversing

the

plug

ff

the

plug

should

sui

fail

to

fit,

contact

your

electrician

to

replace

your

obsolete

outlet.

De

not

deteat

the

safety

purpose

of

the

polarized

plug.

CLEANING

The

apotance

should

be

cleansed

only

with

4

golishing

gloth

or

a

sot

dry

cloth,

Never

clean

with

furiture

wax.

benzine,

insecticides

or

other

volatle

liquids

since

they

may

corrode

the

cabinet

[

{MPORTANT

1

The

lightning

flash

with

arrowhead,

within

an

equilateral

triangle.

15

intended

to

alert

the

user

of

the

presence

of

uninsulated

“dangerous

voltage”

within

the

product's

enclosure

shat

may

be

of

sufficient

magnitude

to

constitute

a

risk

of

eleciric

shock

to

persons

POWER

LINES

—

An

outdoor

antenne

should

be

located

away

from

power

lines.

NONUSE

PERIODS

—

The

power

cord

of

the

ap-

pliance

should

be

unplugged

from

che

outlet

when

left

unused

for

3

long

period

of

time.

OBJECT

AND

LIQUID

ENTRY

—

Care

should

be

taken

so

that

objects

do

not

fall

and

liquids

are

not

spilled

into

the

enclosure

through

openings.

DAMAGE

REQUIRING

SERVICE

—

The

appliance

should

be

serviced

by

Pionee:

authorized

service

center

or

qualified

service

personnel

when:

*

The

power-supply

cord

or

the

plug

has

been

damaged:

or

*

Objects

have

fallen,

or

liquid

has

been

spilled

into

the

appliance;

or

The

appliance

has

been

exposed

to

rain;

or

The

appliance

does

not

appear

to

operate

normally

or

exhibits

a

marked

change

in

performance:

or

*

The

appliance

has

been

dropped;

or

the

enclosure

damaged

SERVICING

—

The

user

should

not

attempt

to

service

the

appliance

beyond

that

described

in

the

operating

instructions.

For

all

other

servicing,

con-

tact

the

nearest

Plone’

authorized

service

center

ie

POWER

LES

service

ENTRANCE

CONCUCTOR:

Sy

Grou

wane

a8,

GROUND

SERVICE

ENTAANCE

cars

iouiewent

Power

service

GROUNDING

ELECTRODE

SYSTEM

fe

iierior

meted

water

aie?

BONDING

TOMPER

FIG.A

CAUTION

RISK

OF

ELECTRIC

SHOCK

DO

NOT

QPEN.

CAUTION

TO

PREVENT

THE

RISK

OF

ELECTRIC

SHOCK,

DO

NOT

REMOVE

COVER

(OR

BACK).

NO

USER-

SERVICEABLE

PARTS

INSIDE

REFER

SERVIC-

ING

TO

QUALIFIED

SERVICE

PERSONNEL

TOEATERNAL

ANTENNA

TERMINALS

OF

PRODUC?

ANTENNA,

DISCHARGE

UNIT

ROUKD

ee

cusses,

REQUIRED

@y

LOCAL

CODES.

see

WEE

SECTION

1031

|

OUTDOOR

ANTENNA

GROUNDING

~

11

an

outside

antenna

is

conn

ach

to

the

anienna

lerminal.

Se

sure

the

sntenna

system

ss

grounded

se as

to

prowde

some

prote

against

voltage

suges

and

pudt

up

srane

charges

In

the

U.S

4

section

$19

of

the

Navonal

Elec

trea!

Code,

ANSUNFPA

No

70-1984,

pro:

vides

information

with

respect

te

prope:

grounding

of

the

mast

and

supporting

struc

Lure,

grounding

of

the

lead.in

wire

to

an

anten

na

discharge

unk,

size

of

grounding

conduc

tors,

location

of

antanna-

discharge

unt,

con

nection

ta

grounding

electrodes,

and

ve

quirements

for

the

grounding

#lectrade,

$

Fig.

A.

2}

Use

No.

10

AWG

(5.3

mm’)

copper,

No

8

AWG

(8.4

mm)

alursnurn,

No

17

AWG

(10

mm

copper

clad

steel,

bronze

wire.

ot

larger

8s

ground

wire

db)

Secure

antenna

lead.

and

STAND-OFF

ground

wires

to

house

with

BUSULATORS

©

stand

off

insulators

spaced

from

4

feet

(1.22

maters)

to

6

tear

(1.83

meters)

apart

c)

Mount

antenna

dis

unit

as

closely

a&

possible

to

ANTENNA,

TeaD

In

wine

where

lead-in

enters

house

d)

Use

jumper

wre

not

smaller

than

No.6

AWG

113.9

mm}

copper

or

equivalent

when

separate

antenna

ground

ang

electrode

ws

used

The

exclamanon

point

within

an

equilateral

inangle

&

intended

to

aledt

the

user

of

the

presence

of

mpariaet

operating

ard

maintenance

(servicing!

i

the

Iherature

accompanying

the

apphan:

IMPORTANT

2

ff

the

apparatus

is

fitted

with

AC

mains

power

outlets),

see

REAR

PANEL

FACILITIES

for

convenient

connec-

tion

of

additional

Hi-Fi

componentis}.

Make

all

connec-

tions

to

the

AC

outlet(s)

and

the

signal

terminals

first.

Connect

the

plug

to

the

wail

socket

last,

make

sure

that

the

power

switch

is

off.

Disconnect

the

wall

plug

when

the

equipment

is

not

in

(regular)

use,

e.g.

when

on

vacation,

The

power

switch

is

secondary

connected

and

therefore

does

not

separate

the

unit

from

mains

power

in

STAND-

BY

(tone

arm

on

the

rest}

position.

2

<PRB-308>

FOR

USE

IN

THE

UNITED

KINGDOM

WARNING:

This

plug

must

only

be

connected

to

electronic

apparatus

equipped

with

suitable

sockets.

if

not,

cut

off

the

plug

and

fit

an

appropriate

type

in

accordancs

with

the

instructions

below.

The

cut-off

plug

must

be

disposed

of

as

an

elec-

trical

shock

hazard

could

exist

if

connected

to

a

socket

outiet.

The

wires

in

this

mains

tead

are

coloured

in

accordance

with

the

following

code

Biue:

Neural

Brown

Live

As

the

colours

of

the

wires

int

the

cains

lead

of

this

ap

paratus

may

not

correspond

with

the

coloured

marking

identifying

the

tecminals

in

your

plug

proceed

as

follows:

The

wire

which

1s

coloured

blue

must

be

connected

to

the

terminal

which

s

marked

with

the

fetter

N

or

col

oured

black

The

wire

which

is

coloured

brown

must

be

connected

to

the

terminal

which

is

marked

with

the

letter

|

or

col

Oured

red.

CONTENTS————_

3

How

to

Play

Records

ad

Maintenance

...........

A

Troubleshooting

..

6

Specifications...

|

Features

Cautions

regarding

handling

Before

Operating

Turntable

Connections

0...

Names

and

Use

of

Parts......

FEATURES

A

auto-return

turntable

with

excellent

cost

performance.

Axle

with

high

performance

DC

servo

motor

and

SH

rotor,

giving

S/N

ratio

of

68

dB,

and

flutter

of

0.07%

(DIN).

Easy

cartridge

replacement

with

the

[74D]

plug-in

cartridge.

LOCATION

Install

turntable

in

a

well

ventilated

location

where

it

will

not

be

exposed

to

high

temperature

or

humidity

Do

not

install

the

turntable

in

a

location

which

is

exposed

to

the

direct

rays

of

the

sun,

or

near

to

stoves

or

radiators.

Excessive

heat

can

adversely

affect

the

cabinet

and

internal

components.

Also,

installation

of

the

turntable

in

a

damp

or

dusty

en

vironment,

may

result

in

malfunction

or

accident.

(Also

avoid

installation

near

cookers

etc.,

where

the

turntable

may

be

exposed

to

smoke

from

oil,

steam

or

heat.)

PRECAUTIONS

REGARDING

INSTALLATION

Install

this

turntable

as

far

as

possible

from

tuners

and

TV

sets.

A

turntable

installed

in

close

proximity

to

such

equipment,

may

cause

noise

or

degradation

of

the

picture.

Such

noise

may

be

particularly

noticeable

when

an

indoor

antenna

is

used.

In

such

a

case,

make

use

of

an

outdoor

antenna,

or

turn

off

power

to

the

turntable.

CONDENSATION

When

the

turntable

is

brought

into

a

warm

room

from

previously

cold

surroundings

or

when

the

room

temperature

is

suddenly

increased,

conden-

sation

may

form

inside

and

the

turntable

may

not

be

able

to

attain

its

full

performance.

In

cases

like

this,

use

the

turntable

after

allowing

it

to

stand

for

about

an

hour

or

after

raising

the

room

temper-

ature

gradually.

CARE

OF

RECORDS

Use

good

quality

cleaner.

if

use

is

made

of

a

dry

type

cleaner

(velvet

or

nylon

brush

etc.),

this

can

result

in

records

becoming

charged

with

static

electricity

which

can

result

in

occurrence

of

noise.

We

recommend

the

use

of

damp

type

cleaners

and

anti-static

sprays

which

aiso

effectively

remove

dust.

3

<PRB-30B->

CAUTIONS

REGARDING

HANDLING

REPLACING

THE

STYLUS

The

fife

of

the

stylus

which

comes

with

the

supplied

cartridge

is

800

to

1,000

hours.

‘Th

(As

a

rough

guide,

if

the

turntable

is

used

for

1

to

2

hours

every

day,

the

stylus

should

jast

1

to

2

years.)

CARTRIDGE

REPLACEMENT

Fa)

mark

is

a

standard

mark

indicating

a

plug-in

connector

type

unit.

Products

with

this

mark

are

mutually

compatible

and

can

be

used

for

If

the

life

of

the

stylus

is

exceeded,

or

use

is

made

the

same

applications.

of

a

damaged

stylus,

the

record

may

be

damaged,

and

the

playback

sound

may

be

distorted.

Please

take

care

to

replace

the

stylus

ahead

of

time.

a@For

the

repiacement

stylus,

make

sure

to

purchase

and

use

a

Pioneer

PN-295T.

After

removing

the

screw

securing

the

old

car-

tridge,

replace

it

with

the

new

cartridge,

and

secure

the

new

cartridge

in

place

with

the

screw.

The

cartridge

installed

in

the

turntable,

is

a

unit

Screw

securing

cartridge

which

was

developed

by

Pioneer.

For

this

reason,

use can

only

be

made

of

the

special

replacement

stylus,

so

please

purchase

the

required

stylus

from

a

shop

dealing

in

Pioneer

products.

gFor

the

replacement

stylus,

make

sure

that

you

use

a

stylus

that

is

a

genuine

Pioneer

product.

If

you

use

a

replacement

stylus

that

is

manufac-

tured

by

any

other

company,

there

can

be

no

guarantee

with

respect

to

degradation

of

per-

formance

or

breakdown,

so

please

make

sure

to

use

the

specified

Pioneer

stylus.

Genuine

Pioneer

styluses

are

marked

with

the

@moneer

mark,

so

please

make

sure

that

this

mark

is

present.

Cartridge

Ordinary

(non-Phillips

type)

screwdriver

BEFORE

OPERATING

TURNTABLE

CONFIRM

SUPPLIED

ACCESSORIES.

Platter

mat

EP

adaptor

(The

EP

adaptor

is

fastened

on

top

of

the

platter.)

4

<PRB-308>

BEFORE

OPERATING

TURNTABLE

ASSEMBLE

THE

UNIT

3

Remove

the

plastic

band

securing

the

tone

arm.

1

After

removing

the

clampers

(x2),

remove

2

LBemove

the

eye

SoNer

the

platter.

Turn

the

clampers

in

the

direction

indicated

by

the

arrow

in

the

diagram,

and

then

remove

up-

ward.

EE

(ae

a

Stylus

cover

wag

2

Install

the

platter

and

the

platter

mat.

@

Place

the

platter

over

the

platter

spindle.

While

doing

this,

hook

the

belt

attached

to

the

inner

side

of

the

platter

over

the

pulley

of

the

motor,

(Make

sure

to

do

this

correctly

as

shown

in

the

diagram.)

(2)

Place

the

platter

mat

onto

the

platter.

aaa

en

—

Ne

|

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poe

pu

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|

|

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Wrong

|Wrong

|

\

Belt

cheb

5

<PRB-308

">

CONNECTIONS

Turntable

Output

cord

fume

L

Ground

lead

Power

cord

Amplifier

Connect

the

Ground

Lead

Attach

the

metal

fitting

to

the

amplifier

ground

ter-

minal

(GND).

2

oy

Connect

the

Output

Cords

Connect

the

plugs

of

the

cords

to

the

input

terminals

of

the

amplifier.

(Always

connect

to

the

MM

terminals.)

®

Connect

the

white

plug

to

the

left

(L)

channel

and

the

red

plug

to

the

right

(R)

channel.

@

Make

sure

plugs

are

pushed

fully

into

the

terminals.

White

Connect

the

Power

Cord

Insert

the

power

cord

plug

into

the

auxiliary

power

outlet

(AC

OUTLET)

of

your

amplifier

unit,

or

into

a

household

wall

outlet.

i=)

<PRB-308>

AFTER

COMPLETING,

READ

THE

FOLLOWING

ITEMS

AND

CONFIRM

THAT

YOU

HAVE

DONE

EVERYTHING

CORRECTLY.

=

Wrong

connections

and

placement

can

resuit

in

malfunction.

@

If

connections

are

made

incorrectly,

this

can

result

in

‘no

sound

output’.

Also,

if

the

plugs

of

the

output

leads

are

nat

fully

inserted

or

ground

leads

are

not

properly

connected,

this

can

result

in

“hum

noise’

(emission

of

a

humming

or

buzzing

sound

from

the

speakers).

@

If

the

turntable

is

tilted,

this

can

result

in

the

symptoms

“sound

is

distorted”,

and

‘tone

arm

slides

across

the

record’.

{f

vibration

is

conducted

to

the

turntable,

this

can

result

in

the

symptoms

“stylus

jumps”,

“sound

is

un-

stable’,

and

“howling”

(howling

or

thumping

sounds

produced

by

the

speaker)

gAlways

connect

to

the

amplifier

input

termi-

nals

for

MM

use

(PHONO

MM

terminals).

gAllow

connecting

leads

to

be

slack.

After

making

connections,

make

sure

that

con

necting

leads

are

not

pulled

tight.

H

leads

are

tight

this

can

result

in

breakage

of

leads

and

howling.

athe

supplied

cartridge

matches

a

load

re-

sistance

of

50

kKQ2.

If

your

stereo

amplifier

has

a

cartridge

load

re

sistance

selector

switch,

please

set

it

to

the

above

value.

NAMES

AND

USE

OF

PARTS

EP

Adaptor

Dust

Cover

When

playing

a

record

with

a

doughnut

hole,

place

this

over

the

platter

spindl

[

Cabinet

SPEED

Selector

Switch

Set

this

switch

to

the

rotation

speed

of

the

record

which

you

intend

to

play.

On

[45]

—

For

45

rpm

records

On

[33]

—

For

33-1/3

rpm

records

TOP

switch

Press

to

stop

play.

ARM

ELEVATION

Switch

@

Use

to

perform

manual

play.

@

Use

to

temporarily

stop

playing.

@

Use

to

change

tracks

in

the

middle

of

play.

When

changed,

the

tone

arm

moves

up

or

down.

On

[UP]

position

—

To

elevate

the

tone

arm.

(The

stylus

is

lifted

off

the

record.)

On

[DOWN]

position

—

To

lower

the

tone

arm.

(The

stylus

is

lowered

onto

the

record.)

<PRB-308

>>

HOW

TO

PLAY

RECORDS

PLAY

PROCEDURES

1

Set

your

stereo

amplifier

for

playing

a

record.

6

Move

the

tone

arm

over

the

record

track

to

For

details

refer

to

the

operating

instructions

for

be

played.

your

stereo

amplifier.

7

Lower

the

tone

arm

with

the

ARM

ELEVA-

2

Open

the

dust

cover.

TION

switch

at

[DOWN]

position.

3

Place

a

record

on

the

platter.

8

Adjust

the

volume

and

tone

controis

of

the

4

Set

the

SPEED

selector

switch

[45

or

33

rpm].

stereo

amplifier.

5

Elevate

the

tone

arm

with

the

ARM

ELE-

(After

the

last

track

has

been

played,

the

tone

VATION

switch

at

[UP]

position.

arm

will

return

automatically.)

OPERATIONS

TO

STOP

PLAYING

Press

the

STOP

switch.

Several

seconds

after

pressing

the

switch,

the

tone

arm

will

automatically

return,

and

the

platter

will

stop

rotating.

8

<PRB-308>

HOW

TO

PLAY

RECORDS

OPERATIONS

TO

TEMPORARILY

INTERRUPT

PLAYING

1

Set

the

ARM

ELEVATION

switch

to

[UP]

position.

This

will

cause

the

stylus

to

be

lifted

off

the

record

and

playing

will

be

interrupted

(the

platter

will

con-

tinue

rotating)

2

To

resume

playing,

set

the

ARM

ELEVATION

switch

to

[DOWN]

position.

The

stylus

will

be

lowered

onto

the

record,

and

playing

will

be

resumed

STYLUS

REPLACEMENT

PROCEDURE

Please

carry

out

these

operations

after

setting

the

stereo

amplifier

to

minimum

volume.

1

Remove

the

stylus

from

the

cartridge.

Grip

the

stylus

holder,

and

carefully

pull

in

the

direction

of

the

arrow

*

oS

Stylus

holder

2

install

a

new

stylus

holder

(replacement

stylus)

into

the

cartridge.

CARE

OF

THE

STYLUS

mUse

a

soft

brush

Remove

dust

and

lint

from

the

point

of

the

stylus

by

moving

the

brush

in

the

forward

direction.

Attempting

to

remove

dust

with

fingers

may

result

in

damage.

=

When

dirt

cannot

be

removed

with

a

brush

When

dirt

cannot

be

removed

with

a

brush,

remove

it

with

a

commercially

available

stylus

cleaner

etc.

Spillage

of

the

cleaning

fluid

onto

plastic

parts

or

onto

the

rubber

of

the

stylus

damper,

may

soften

or

dissolve

these

parts

and

result

in

degradation

of

performance,

so

please

use

the

cleaning

fluid

with

care.

<(PRB-308>

TROUBLESHOOTING

Incorrect

operations

are

often

mistaken

for

trouble

and

malfunctions.

If

you

think

that

there

is

something

wrong

with

this

component,

check

the

points

below.

Sometimes

the

trouble

may

lie

in

another

component.

Investigate

the

other

components

and

electrical

appliances

being

used.

If

the

trouble

cannot

be

rectified

even

after

exercising

the

checks

listed

below,

ask

your

nearest

PIONEER

authorized

service

center

or

your

dealer

to

carry

out

repair

work.

Symptom

Probable

Cause

Remady

Platter

does

not

rotate.

®

Power

plug

is

disconnected

from

outlet.

@

The

turntable

is

plugged

into

an

auxiliary

power

outlet

operated

by

the

power

switch

of

the

stereo

amplifier

(SWITCHED

outlet),

and

the

power

switch

of

the

stereo

amplifier

is

turned

OFF.

@

The

platter

belt

has

come

off,

or

is

not

hooked

over

the

motor

pulley.

@

Insert

plug

into

stereo

amplifier

or

wall

outle!

Turn

on

the

power

switch

of

the

stereo

amplifier,

@

Correctly

hook

the

beit

over

the

platter

and

motor

pulley.

No

sound

_——____._.

®

Output

cords

are

not

connected

properly.

®

Cartridge

and/or

stylus

are

not

installed

properly.

®

Incorrect

operation

of

stereo

amplifier.

Noise

and

scratch

sounds

are

produced.

(Clicking

sounds

etc.

are

produced.)

Sound

jumps,

sound

is

distorted.

@

The

record

has

dust

and

dirt

on

its

surface.

@

Output

lead

pin

plugs

and/or

stereo

amplifier

input

terminals

are

dirty.

@

Dust

or

dirt

on

the

point

of

the

cartridge

stylus.

®

The

point

of

the

cartridge

stylus

is

worn.

©

Make

proper

connections

between

the

turntable

and

stereo

amplifier.

@

Properly

install

the

cartridge

and

stylus.

is

@

Check

the

settings

of

the

amplifier

switches.

®

Clean

the

record

with

cleaner

etc,

®@

Clean

away

dirt.

‘©

Clean

the

point

of

the

stylus

with

a

brush.

®

Replace

the

stylus.

Howing

occurs

{When

the

volume

is

increased

when

a

record

is

being

played,

a

howling

sound

is

produced

by

the

speaker

system.)

®

Vibrations

from

the

speaker

system

are

being

con-

ducted

from

the

floor

to

the

record

and

cartridge.

®

Sound

waves

from

the

speaker

system

are

being

transmitted

directly

to

the

cartridge.

@

Move

the

turntable

further

away

from

the

speaker

jsystem.

®

Place

the

turntable

on

a

firm

foundation

etc.

©

Change

the

place

of

installation

of

the

lturntable.

10

<PRB-308>