Pioneer SA-708 User manual

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1

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STEREO

AMPLIFIER

©)

PIONEER’

A=708

OPERATING

INSTRUCTIONS

HA,

HR

S,S/G

The

specifications

of

this

model

differ

according

to

the

shipment

destination.

e

For

U.K.

and

Australia

(HR

stamped

on

packing

case):

Power

line

voltage

is

240

volts.

A

DIN

socket

is

provided

on

the

rear

panel.

@

For

mainland

Europe

(HA

stamped

on

packing

case):

Power

line

voltage

is

220

volts.

AC

convenience

outlets

are

provided

on

the

rear

panel,

and

a

DIN

socket

is

pro-

vided

on

the

rear

panel.

e

For

destinations

excluding

above

(S

or

S/G

stamped

on

packing

case):

A

4-point

(110V/120V/220V/240V)

volt-

age

selector

switch

is

provided

on

the

rear

panel,

and

AC

convenience

outlets

are

provided

on

the

rear

panel.

NOTE:

Models

for

the

U.K.

and

Australia

(HR)

and

mainland

Europe

(HA)

have

their

power

line

voltages

set

in

accord-

ance

with

their

destination

before

they

are

shipped

from

the

factory.

The

voltage

which

has

thus

been

set

is

indi-

cated

on

the

rear

panel

of

the

main

unit.

Before

switching

on

the

power,

make

absolutely

sure

that

the

voltage

tallies

with

the

value

used

in

your

area.

If

it

does

not

tally

or

if

you

move

to

another

area

with

a

dif-

ferent

voltage

(such

from

220V

to

240V)

or

vice

versa,

get

in

touch

with

your

nearest

authorized

Pioneer

Service

Center

or

Service

Station

or,

alternatively,

call

for

a

quali-

fied

electrician

to

set

the

voltage

properly.

IMPORTANT

To

prevent

electric

shock,

do

not

remove

cover,

No

user

FOR

USE

IN

UNITED

KINGDOM

AND

serviceable

parts

inside,

refer

servicing

to

qualified

serv-

AUSTRALIA

|

sce

DETTE!

or

CAUTION

240V:

Mains

supply

voltage

is

facto-

Always

disconnect

all

the

equipment

from

the

mains

:

supply

when

disconnecting

the

signal

leads.

The

power

ry

adjusted

at

240V.

cord

should

be

connected

last,

make

Sur:

that

the

power

FOR

USE

IN

UNITED

KINGDOM

switch

is

off.

First,

insert

the

female

appliance

connector

: 3 P

:

‘

of

the

mains

cord

into

the

AC

INLET,

then

plug

the

The

wires

in

this

mains

lead

are

coloured

in

accordance

cord

to

the

wall

socket.

Be

sure

that

the

appliance

con-

WHEL

RE

ee

—

Velloips

“Barth

nector

is

fully

inserted

into

the

AC

INLET.

pe

ie

Sean

rae

al

Unplug

the

set

from

the

wall

socket

when

it

is

not

to

be

aes

ao

Brown:

Live

used

for

an

extended

period

of

time.

. : ; :

f

DEnOr

OEE

As

the

colours

of

the

wires

in

the

mains

lead

of

this

ap-

paratus

may

not

correspond

with

the

coloured

marking

WARNING

identifying

the

terminals

in

your

plug

proceed

as

fol-

lows.

THIS

APPARATUS

MUST

BE

EARTHED.

The

wire

which

is

coloured

green-and-yellow

must

be

connected

to

the

terminal

which

is

marked

with

the

let-

ter

E

or

with

the

safety

earth

symbol

+

or

coloured

:

OR

YOUR

SAFETY

green

or

green-and-yellow.

1,

Insert

this

plug

only

into

effectively

earthed

three-pin

The

wire

which

is

coloured

blue

must

be

connected

to

plug-socket

outlet.

the

terminal

which

is

marked

with

the

letter

N

or

colour-

2.

If

any

doubt

exists

regarding

the

earthing,

consult

a

ed

black.

qualified

electrician.

The

wire

which

is

coloured

brown

must

be

connected

to

3.

Extension

cords,

if

used,

must

be

three-core

correctly

the

terminal

which

is

marked

with

the

letter

L

or

colour-

wired.

ed

red.

a

eg

a

a

a

a

a

a

ee

ee ee

NTS

MCAUUICS

2.24

as

ow.

ea

Ree

whe

wad

O24

Sa

Stereo

System

Composition

..............

Installation

Precautions................6.

Rear

Panel

Facilities

..................-.-

CONnKECTIONS

o:.2.ae

hbk,

SESS

EASES

FEATURES

DC

Power

Amplifier

with

High

S/N

and

Low

Dis-

tortion

This

is

a

DC

configuration

power

amplifier

which

uses

superlinear

transistors

with

excellent

high-range

switching

characteristics

for

the

power

transistors.

The

result

is

a

Continuous

Power

Output

of

65

watts”

per

channel,

min.,

at

8

ohms

from

20

Hertz

to

20,000

Hertz

with

no

more

than

0.02

%

total

harmonic

distortion

or

65

watts

per

channel

at

4

ohms

from

20

Hertz

to

20,000

Hertz

with

no

more

than

0.03%

_

total

harmonic

distortion.

The

power

amplifier

circuit

board

features

a

heat

sink

partition

to

separate

the

small-signal

class

A

amplifier

sec-

tion

and

the

output

stage

class

B

amplifier

section

and

power

supplies.

This

prevents

interference

between

the

small-signal

and

large-signal

sections.

Furthermore,

the

heat

sink

is

lightweight

and

has

a

T-shaped

“skyve’’

construction

for

an

effective

heat

dissipation

capability.

This

feature

keeps

the

rise

in

the

temperature

down

and

it

ensures

that

a

high-quality

sound

is

provided.

Equalizer

Amplifier

with

a

High

S/N

and

Low

Dis-

torsion

.

The

3-stage

direct-coupling

with

three

low-noise

tran-

sistors

is

a

design

which

brings

out

the

best

in

the

final-stage

emitter

follower

equalizer

amplifier.

All

the

various

com-

ponents

that

are

used

for

the

equalizer

elements

help

pro-

vide

a

PHONO

signal-to-noise

ratio

of

86dB

(IHF-A),

an

RIAA

deviation

of

+0.2dB

(20Hz

to

20,000Hz),

and

a

phono

overload

level

of

200mV

(1kHz,

T.H.D

0.01%)

for

the

high-fidelity

re-creation

of

sound

from

records.

Highly

Reliable

Protection

Circuits

There

are

protection

circuits

which

serve

to

detect

over-

load

and

the

mid-point

voltage

in

the

power

amplifier

stage.

When

the

speaker

terminals

are

shorted

or

something

unex-

pected

happens

that

causes

the

mid-point

voltage-to

under-

go

an

abnormat

change,

the

circuits

use

a

relay

to

immedi-

ately

cut

the

power

amplifier

off

from

the

speakers.

They

-

also

function

as

a

muting

circuit

when

the

power

switch

is

Operations

:.4.25

465.665

Cee

ee

eee

TOS

pes

Using

the

Tape

Decks

..................

Conditions

Frequently

Mistaken

for

Malfunctions

os

sind

wai

ones

eee

ae

Specifications

...........2+.0000-

Schematic

Diagram

...............

set

to

the

ON

and

OFF

positions

to

suppress

the

undesira-

ble

noise

which

is

generated

and

to

safeguard

the

speakers

from

damage.

Power

Level

Indicator

with

Fluorescent

Display

Used

for

the

power

level

indicator

are

two

fluorescent

displays

(one

for

the

left

channel

and

the

other

for

the

right)

which

feature

a

very

fast

response

speed

to

indicate

the

power

level

virtually

instantaneously.

This

indicator

is

composed

of

highly

dependable

ICs

and

its

logarithmic

compression

and

drive

circuits

make

it

possible

for

a

wide

range

of

power

levels

from

0.003W

right

up

to

the

maxi-

mum

levels

to

be

indicated

for

both

the

left

and

right

chan-

nels

independently

without

switching

knobs

or

levers.

Rich

Store

of

Accessory

Functions

e@

The

phono

interference

filter

switch

serves

to

reduce

the

radio-frequency

interference

from

external

electronic

or

electrical

appliances

or

produces

during

record

play.

e

The

subsonic

filter

switch

serves

to

cut

out

the

low-

frequency

noise,

which

is

harmful

to

your

speakers,

ge-

nerated

by

record

warp.

e@

The

loudness

switch

compensates

for

the

deficiencies

of

the

human

ear

with

respect

to

low-frequency

and

high-

frequency

sound

and

it is

also

useful

when

listening

to

programs

at

night,

for

instance,

with

the

sound

turned

down.

e@

The

tone

switch

is

a

convenient

control

for

checking

the

efficacy

of

the

two

tone

controls.

e

The

function

indicators

tell

you

the

program

source

at

a

glance.

e

The

amplifier

is

provided

with

two

sets

(A

and

B)

of

speaker

terminals

so

that

you

can

connect

two

sets

of

speaker

systems.

This

means

that

you

can

listen

to

the

program

on

one

set

in

another

room.

@

The

amplifier

is

also

equipped

with

two

sets

of

tape

deck

jacks

for

connecting

two

tape

decks.

The

tape

monitor

switches

can

be

used

to

dub

tapes

from

TAPE

1

deck

to

TAPE

2

deck

and

for

simple

tape

editing.

e

MODE

switch

can

be

used

to

select

between

stereo

and

mono

modes.

It

is

effective

in

adjusting

the

balance

be-

tween

the

left

and

right

channels.

e

MUTING

switch

can

be

used

to

momentarily

reduce

the

volume

level,

or

alternatively,

you

can

use

it

to

adjust

the

volume

subtly

in

combination

with

the

volume

con-

trol

knob.

*

Measured

pursuant

to

the

Federanl

Trade

Commision’s

Trade

Regulation

rule

on

Power

Output

Claims

for

Amplifiers.

PIONEER

STEREO

SYSTEM

COMPOSITION

Shelves

Installing

the

stereo

amplifier

Make

sure

that

the

shelves

are

stable

@

Choose

a:

location

where

the

‘heat

and

fully

capable

of

supporting

heavy

will

be

dissipated

easily.

HUN

ue

ail

é

aor

l

3)

6

:

;

L_

i

Turntable

——

eSet

the

turntable

so

that

it

is

:

Tuner

not

affected

by

vibration.

|

<1

\

eDo

not

make

the

connecting

eKeep

the

dust

cover

closed

as

8

88

O

i

cords

longer

than

necessary.

much

as

possible.

a!

e@

Set

the

antenna

in

the

direction

Audio

rack

iGo)

best

suited

for

reception.

e

Stack

the

records

up

for

storage

NOY,

Use

an

external

antenna

for

FM

—

do

not

lay

them

fiat.

Pil@@kt—Hl

woe

d]—

reception.

e

e-recorded

7

|

eDo

not

expose

pre-recor

1

Tape

deck

eMake

sure

you

clamp

the

reels

tapes

near

the

stereo

system

for

rs

as

co

Se

a

ae

when

using

the

tape

deck.

long-periods

of

time.

tg

4

e

Do

not

store

the

tapes

anywhere

CAs

near

a

magnetic

field.

Uusen

=

The

sound

quality

some-

cyto

ets

—-

»

riick

aurtaine

nae

esti

onde

|i

|-—

|

<

e@

Use

curtains

to

shade

the

stereo

ee

the

funiture

:

:

system

from

the

direct

rays

of

:

fea)

be

-——————4

the

sun.

aa

=

Cer

atee

ee

eCurtains

also

help

to

reduce

.

paced

Wi

(oan

resonance

and

reverberation

in

ue

Ce

eee

the

listening

room.

t

a

“

Se

ee

ee

=e

PN

Speaker

system

}

e@

Install

the

speakers

to

the

left

and

right

so

that

they

are

subject

to

the

same

conditions

Connecting

the

speakers

both

to

the

side

and

at

the

back.

(The

bass

Carpet

Listening

position

is

slight-

is

more

pronounced

if

you

set

them

up

Use

high

current

capacity

con-

Carpets

on

the

floor

fy

to

the

apex

of

an

equi-

against

a

wall.)

necting

cords

and

do

not

make

help

to

absorb

the

lateral

triangle

formed

with

eInstall

the

speakers

so

that

they

are

not

them

longer

than

necessary.

sound.

left

and

right

speakers.

affected

by

vibration

transmitted

through

the

floor.

INSTALLATION

PRECAUTIONS

To

ensure

the

best

sound

quality

and

trouble-free

operation,

avoid

setting

up

the

amplifier

in

any

of

the

locations

described

below:

Locations

liable

to

downgrade

performance

and

result

in

breakdowns

Resulting

trouble

1.

Locations

exposed

to

direct

sunlight,

or

near

heaters.

.

External

heat

causes

the

performance

of

the

electronic

parts

to

deteriorate,

and

operation

becomes

unstable.

2.

Locations

with

poor

ventilation,

with

high

humidity

or

mois-

.

Cause

of

faulty

contact

in

input-output

terminals,

and

rust.

ture

contents,

or

dusty

locations.

High

humidity

and

a

high

moisture

content

cause

deterioration

in

insulation.

There

is

also

the

danger

of

current

leakage

and

heat

generation

in

the

circuit

parts.

Dust

or

grease

in

the

rotat-

ing

parts

causes

them

to

deteriorate.

3.

Locations

susceptible

to

vibration.

.

These

locations

affect

the

precision

parts

adversely.

REAR

PANEL

FACILITIES

SA-708/HA

model

Opa

i

li

Pig

0

ele

as

t

Oe

>

eS

SS

—

—a

>

o>

>

-

—s

=

@

PHONO

INTERFERENCE

FILTER

SWITCH

This

is

used

to

attenuate

radio-frequency

inter-

ference

from

external

electronic

or

electrical

appliances

or

products

during

record

play.

@

PHONO

JACKS

Connect

the

turntable

output

cords

to

these

jacks.

@®

TUNER

JACKS

Connect

the

tuner

cords

to

these

jacks.

4

@

AUX

JACKS

These

are

auxiliary

input

jacks.

Connect

a

TV

tuner

or

cartridge

tape

player

to

them.

©

SPEAKERS

TERMINALS

A

Connect

your

first

pair

of

speakers

to

these

ter-

minals.

©

SPEAKERS

TERMINALS

B

Connect

your

second

pair

of

speakers

to

these

terminals.

@

AC

OUTLETS

(HA,

S,

S/G

models)

These

are

spare

power

outlets.

Insert

the

power

plug

on

the

stereo

components

(turntable,

tuner,

tape

deck,

etc.)

into

these

outlets.

SWITCHED:

The

power

supplied

through

these

outlets

is

coupled

to

the

operation

of

the

amplifier’s

power

switch.

The

maximum

power

capacity

which

may

be

connected

to

the

two

SWITCHED

outlets

is

100W.

UNSWITCHED:

The

power

is

always

supplied

through

this

outlet

regardless

of

the

posi-

tion

of

the

power

switch.

The

maximum

power

capacity

which

may

be

connected

to

this

outlet

is

200W.

NOTES:

@

Never

connect

an

iron

ora

toaster

to

these

outlets.

@

Do

not

get

the

power

outlets

and

the

power

plugs

wet

or

touch

them

with

wet

hands,

since

you

may

get

an

electric

shock.

GND

TERMINAL

This

is

the

ground

terminal.

Connect

the

ground

wire

of

the

turntable,

etc.

to

this

terminal.

@

TAPE

1

JACKS

Connect

the

tape

deck

cords

to

these

jacks.

Connect

the

REC

(recording)

jacks

to

the

INPUT

jacks

on

the

tape

deck,

and

the

PLAY

(playback)

jacks

to

the

OUTPUT

jacks.

TAPE

2

JACKS

Connect

your

second

tape

deck

cords

to

these

jacks.

Connect

the

REC

(recording)

jacks

to

the

INPUT

jacks

on

the

tape

deck,

and

the

PLAY

(playback)

jacks

to

the

OUTPUT

jacks.

@

TAPE

2

JACK

(HA,

HR

models

only)

Connect

the

tape

deck

to

this

jack

with

DIN-type

(recording/playback)

cord.

a2

AC

INLET

(HA,

HR

models

only)

Plug

the

power

cord

into

this

socket.

PIONEER

(3)

LINE

VOLTAGE

SELECTOR

SWITCH

(S,

S/G

models

only)

Check

that

the

indication

of

the

switch

is

same

as

your

residence

before

plugging

the

power

cord

|

into

the

outlet.

If

it

isn’t

or

if

you

move

to

an

area

where

the

voltage

requirements

differ,

change

the

switch

setting

as

follows.

Before

adjusting,

disconnect

the

power

cord.

1.

Unscrew

the

fuse

cap

with

a

Phillips

screw-

(g

driver,

then

take

out

the

fuse

and

plug.

Fuse

cap

“Lg

2.

Re-install

the

plug

with

its

cutaway

section

Phillios

Setewativer

exposing

the

correct

voltage

indication

as

os

Table

shown

in

Fig.

A.

3.

Refer

to

the

table

and

install

a

replacement

fuse

(provided

as

an

accessory).

4.

Insert

the

fuse

in

the

fuse

cap,

then

fit

the

cap

to

the

plug

and

tighten.

Fig.

A

CONNECTIONS

wren

nnn

nn

nnn

nnn

nnn

nnn

CONNECTION

DIAGRAM

|

\

Turntable

\

Cartridge

tape

Tuner

player

i

8

g

#9

O

GND

|

|OUTPUT

OUTPUT

OUTPUT

SA-708/HA

SWITCHI

o¢

TOTAL

1

eD

DOW

MAx

Connect

to

ground

terminal

of

turntable,

(tuner,

tape

deck,

etc.)

la

=

{

INPUT

|

(REC)

OUTPUT

|

Ground

(PLAY)

l

lead

Tape

deck

1

)

|

PELE

AE

Aa

©,

#6

|

L

~—

Grounding

INPUT

OUTPUT

to

earth

Tape

deck

2.

(REC)

(PLAY)

ooo

[Es

==]

C

I

!

|

I

§

Seesep

-

Sse

cook

J

L

R

L

R

DIN

connector

Speaker

system

A

Speaker

system

B

{

SPEAKER

SYSTEM

CONNECTIONS

(Fig.

1)

The

amplifier

is

provided

with

two

sets

of

SPEAK-

ERS

output

terminals.

Use

the

A

set

when

con-

necting

only

one

set

of

speakers.

Viewed

from

the

front,

the

R

(right

channel)

SPEAKERS

terminals

are

on

the

right

and

the

L

(left

channel)

SPEAK-

ERS

terminals

are

on

the

left.

Connect

the

left

channel

speaker

to

the

L

terminals

and

the

right

channel

speaker

to

the

R

terminals.

The

red

L

and

R

SPEAKERS

terminals

have

a

plus

polarity

and

the

black

terminals

have

a

minus

polarity

and

the

speaker

systems

have

also

the

same

dual

polarities.

When

connecting,

always

connect

minus

to

minus

and

plus

to

plus.

Cautions

when

connecting

the

speakers

1.

The

speaker

output

terminals

have

polarities:

minus

(black)

and

plus

(red).

The

input

jacks

on

the

speakers

also

have

plus

and

minus

polarities.

When

connecting,

make

sure

that

these

polarities

are

aligned:

plus

to

plus

and

minus

to

minus.

If

the

left

and

right

speaker

polarities

are

mis-

aligned,

the

reproduced

sound

will

not

display

a

natural

stereo

effect.

2.

Use

speakers

with

a

nominal

impedance

ranging

from

4

ohms

to

16

ohms.

3.

Never

use

the

speakers

with

the

speaker

output

terminals

shorted

(minus

and

plus

jacks

con-

nected)

since

this

may

damage

the

power

transis-

tors

in

the

amplifier.

Processing

and

connecting

the

speaker

cords

(Fig.

2)

1.

Cut

off

the

covering

of

the

speaker

cords

as

shown

in

Fig.

2-

@.

2.

If

the

strands

at

the

tip

of

the

cord

are

pointing

in

all

directions,

twist

them

with

your

thumb

and

forefinger.

Otherwise

some

of

the

strands

may

come

into

contact

with

other

terminals

and

cords,

and

cause

a

short.

3.

Push

down

on

the

buttons

under

the

terminals

with

the

tip

of

your

finger,

and

slip

the

tip

of

the

cord

into

the

hole

in

the

center

of

the

terminal.

Make

sure

that

the

lead

wire

in

the

cord

does

not

protrude.

4.

Remove

your

fingertip

from

the

button.

The

-

terminal

will

snap

back

into

position

and

so

check

that

the

cord

is

securely

connected.

You

may

not

hear

any

sound

if

the

cords

are

not

connected

properly.

Right

channel

speaker

system

SPEAKERS

terminals

Connect

your

second

pair

of

speaker

system.

Left

channel

speaker

system

Fig.

1

Speaker

lead

wire

preparation

and

connection

Fig.

2

!

i

TURNTABLE

CONNECTIONS

(Fig.

3)

Connect

the

output

cords

of

a

turntable

to

the

PHONO

input

jacks.

Connect

the

ground

lead

of

the

turntable

to

the

GND

terminal

on

the

ampli-

fier.

NOTE:

The

way

in

which

the

output

cords

are

attached

will

depend

on

the

type

of

cartridge

used.

If

you

intend

to

use

a

low-output

moving

coil

(MC)

cartridge,

always

provide

a

special

MC

transformer

or

a

head

amplifier.

TUNER

CONNECTIONS

(Fig.

4)

Connect

the

output

jacks

of

a

stereo

tuner

to

the

TUNER

input

jacks

with

the

connecting

cords.

AUX

JACKS

CONNECTIONS

(Fig.

5)

These

jacks

can

be

connected

to

the

OUTPUT

(PLAY)

jacks

on

a

TV

tuner,

cartridge

tape

player

or

tape

deck.

Use

connecting

cords

with

pin

plugs

to

connect

the

OUTPUT

jacks

on

the

component

with

the

AUX

jacks.

TAPE

DECK

CONNECTIONS

(Fig.

6)

This

amplifier

is

provided

with

two

sets

of

record-

ing

(TAPE

REC)

output

jacks

and

two

sets

of

playback

(TAPE

PLAY)

input

jacks.

Connect

each

of

the

jacks

in

the

following

way

using

the

con-

necting

cords

which

come

with

the

tape

deck.

Connections

for

recording

Connect

the

recording

input

jacks

(INPUT)

on

the

tape

deck

to

the

TAPE

REC

jacks

on

the

amplifier.

Connections

for

playback

Connect

the

playback

output

jacks

(OUTPUT)

on

the

tape

deck

to

the

TAPE

PLAY

jacks

on

the

amplifier.

NOTE:

Connect

your

second

tape

deck

to

the

TAPE

2

jacks

(REC,

PLAY).

Connections

using

the

recording/playback

connector

(Applicable

to

HA,

HR

models)

If

your

tape

deck

is

equipped

with

a

recording/

playback

connector

(DIN-type),

use

the

optional

recording/playback

cord

to

connect

this

connector

with

the

TAPE

2

REC/PLAY

jack

on

the

amplifier.

In

such

cases,

do

not

connect

pin

cords

(ordinary

pin

plug

cords)

to

the

TAPE

2

REC

and

PLAY

jacks.

ET

PIONEER

Turntable

PHONO

input

jacks

Fig.

3

L

channel

7]

R

channel

TUNER

input

jacks

Fig.

4

Cartridge

tape

player

9

OUTPUT

jacks

a

—

wa

L.

channel

ll

R

channel

AUX

input

jacks

Fig.

5.

Tape

deck

1

OUTPUT

-

INPUT

(PLAY)

(REC)

Recording

connections

Fig.

6

FRONT

PANEL

FACILITIES

11

-

=

il

TUNER

=

PHONO.

AUX

an

Jermemmma

esos

wins

oo

cos

93

3

10

@s|

(aa

———————

@

POWER

SWITCH

Set

this

switch

to

ON

to

supply

power

to

the

amplifier.

There

will

be

a

short

delay

when

it

is

set

to

ON,

because

the

muting

circuit

has

been

actuated

to

suppress

the

unpleasant

noise

that

is

sometimes

generated

when

the

power

is

on

and

off.

@

SPEAKER

SELECTOR

Use

this

selector

to

select

the

speaker

systems.

OFF:

Sound

not

obtained

from

speakers.

A:

Sound

obtained

from

speakers

connected

to

the

A

speaker

terminals.

B:

Sound

obtained

from

speakers

connected

to

the

B

speaker

terminals.

A+B:

Sound

obtained

from

speakers

connected

to

both

A

and

B

speaker

terminals.

@

POWER

METER

This

meter

allows

you

to

read

out

the

rated

power

level

on

the

fluorescent

display

tube

when

speakers

with

a

nominal

impedance

of

8

ohms

are

connected

to

the

amplifier’s

speaker

terminals.

@

FUNCTION

INDICATORS

The

TUNER,

PHONO,

AUX

function

indicators

light

up

in

accordance

with

the

position

of

the

function

selector.

NOTE:

The

function

indicator

will

not

go

off

when

the

tape

monitor

switch

is

set

to

position

‘‘1”’

or

‘‘2”’.

@©

LOUDNESS

SWITCH

When

listening

to

a

performance

with

the

volume

control

turned

down,

set

this

switch

to

ON

and

the

bass

and

treble

will

be

accentuated.

When

the

volume

is

low,

the

human

ear

finds

it

harder

to

hear

the

bass

and

treble

than

when

the

volume

is

high.

The

loudness

switch

is

thus

designed

to

compensate

for

this

deficiency.

By

setting

it

to

ON,

the

bass

and

treble

come

through

much

more

strongly

and

the

sound

takes

on

a

punch

even

when

the

volume

control

is

turned

down.

©

VOLUME

CONTROL

Use

this

control

to

adjust

the

output

level

to

the

speakers

and

headphones.

Turn

it

clockwise

to

increase

the

output

level.

No

sound

will

be

heard

if

you

set

it

to

“‘0”’.

@

MUTING

SWITCH

Set

this

switch

to

—20dB

to

attenuate

the

audio

output

by

20dB.

There

is

no

need

to

adjust

the

volume

control

if

you

use

this

switch

when

turn-

ing

down

the

audio

output

temporarily

and

when

changing

over

records

or

tapes.

HEADPHONE

JACK

Plug

the

headphones

into

this

jack

when

you

want

to

listen

through

your

stereo

headphones.

NOTE:

Set

the

speaker

selector

to

OFF

when

listening

only

with

headphones,

@)

BASS

AND

TREBLE

CONTROLS

|

|

Use

these

controls

to

adjust

the

bass

and

the

|

treble.

If

you

set

the

tone

switch

to

ON

and

turn

the

bass

control

to

right

from

its

center

position,

you

will

be

able

to

emphasize

the

sound

in

the

low-frequency

range,

Conversely,

turning

the

bass

control

to

the

left

from

the

center

position,

you

will

attenuate

the

sound.

You

can

use

the

treble

control

to

adjust

the

sound

in

the

high-frequency

range.

TONE

SWITCH

Set

this

switch

to

ON

when

adjusting

the

bass

and

treble

controls.

When

set

to

OFF,

the

tone

con-

trol

circuits

are

disengaged

and

frequency

response

is

flat.

This

function

is

convenient

for

checking

phono

cartridge

and

speaker

tone

quality

and

listening

room

acoustics.

@

BALANCE CONTROL

Use

this

control

to

balance

the

volume

of

the

left

and

right

channels.

First,

however,

set

the

mode

selector

to

MONO,

and

adjust

so

that

the

sound

appears

to

come

from

somewhere

exactly

be-

tween

the

two

speakers.

If

the

sound

appears

to

be

louder

on

the

right,

it

means

that

the

volume

of

the

right

channel

is

higher.

Turn

the

balance

control

to

the

left

and

adjust.

Conversely,

if

the

sound

appears

to

be

louder

on

the

left,

it

means

that

the

volume

of

the

left

channel

is

higher.

Therefore,

turn

the

balance

control

to

the

right

and

adjust.

After

adjusting,

return

the

mode

selector

to

ST.

(2

SUBSONIC

FILTER

SWITCH

When

this

switch

is

set

to

the

15Hz

position,

the

subsonic

filter

with

a

cut-off

frequency

of

15Hz

is

actuated.

The

subsonic

filter

serves

to

attenuate

frequencies

lower

than

15Hz

in

a

6dB/oct

slope.

It

is

therefore

effective

in

suppressing

ultra-low-

frequency

noise

which

is

generated

by

record

warp

and

other

causes.

You

cannot

actually

hear

this

noise

but

it is

a

factor

in

the

generation

of

intermodulation

distortion

and

it

may

damage

your

speaker

system.

Set

this

switch

to

the

15Hz

position

during

record

play

for

the

best

effect.

(3

MODE

SELECTOR

Use

this

selector

for

selecting

the

performances.

ST:

Set

to

this

position

for

normal

stereo

re-

production.

MONO:

Mixes

left

and

right

channel

signals

and

reproduces

them

monophonically.

FUNCTION

SELECTOR

Use

this

selector

to

select

the

program

source.

When

set,

the

function

indicator

above

the

meter

panel

corresponding

to

the

position

of

the

func-

tion

selector

will

light

up.

TUNER:

Set

here

when

listening

to

broadcasts

on

a

tuner

connected

to

the

TUNER

jacks.

(The

TUNER

function

indicator

lights

up.)

PHONO:

Set

here

when

playing

records

on

a

turntable

connected

to

the

PHONO

jacks.

(The

PHONO

function

indicator

lights

up.)

AUX:

Set

here

when

listening

to

a

program

source

which

is

connected

to

the

AUX

jacks.

.

(The

AUX

function

indicator

lights

up.)

(5)

TAPE

DUPLICATE

SWITCH

Use

this

switch

when

employing

two

tape

decks

to

duplicate

recorded

tapes

or

edit

tapes.

This

switch

is

otherwise

kept

at

the

OFF

position.

1>2:

When

playing

back

the

tape

on

a

deck

con-

nected

to

the

TAPE

1

jacks

and

recording

(duplicating)

on

a

deck

connected

to

the

TAPE

2

jacks.

OFF:

Set

to

this

position

when

not

duplicating.

2>1:

When

playing

back

the

tape

on

a

deck

con-

nected

to

the

TAPE

2

jacks

and

recording

(duplicating)

on

a

deck

connected

to

the

TAPE

1

jacks.

TAPE

MONITOR

SWITCH

Use

this

to

select

the

program

source

which

is

being

reproduced.

'

Set

here

to

monitor

a

recording

or

a

tape

being

played

back

on

a

tape

deck

which

is

connected

to

the

TAPE

1

jacks.

OFF:

Set

here

whenever

you

are

not

playing

back

a

tape

or

monitoring

a

recording

(i.e.

when

you

have

set

the

function

selector

to

PHONO

or

TUNER,

or

AUX

for

an

alter-

native

program

source).

2:

Set

here

to

monitor

a

recording

or

a

tape

being

played

back

on

a

tape

deck

which

is

connected

to

the

TAPE

2

jacks.

OPERATIONS

Volume

control

Loudness

switch

Speaker

selector

Tone

controls

Tone

switch

Balance

control

PRIOR

TO

SWITCHING

POWER

ON

Before

switching

the

power

on,

set

the

various

controls

as

follows:

1.

Set

the

subsonic

filter

switch

to

OFF.

.

Set

the

volume

control

to

0.

.

Set

the

tape

duplicate

switch

to

OFF.

.

Set

the

tape

monitor

switch

to

OFF.

Set

the

tone

switch

to

OFF.

Set

the

balance

control

to

the

center

position.

Set

the

loudness

switch

to

OFF.

Set

the

muting

switch

to

OFF.

.

Set

the

mode

selector

to

ST.

Set

the

tone

controls

to

the

center

positions.

.

Set

the

speaker

selector

to

the

appropriate

position

according

to

the

employed

terminals.

PLAYING

RECORDS

1.

Set

the

function

selector

to

PHONO.

2.

Operate

the

turntable

to

play

the

record.

3.

Adjust

the

volume

with

the

volume

control.

4.

Set

the

tone

switch

to

ON

in

line

with

your

preference

and

adjust

the

tone

with

the

tone

controls.

HOODIA

AWN

et

Precautions

when

playing

records.

.

e

Lower

the

stylus

gently

on

to

the

surface

of

the

record.

It

is

a

good

idea

to

set

the

muting

switch

to

—20dB

or

to

turn

the

volume

down

when

lowering

the

stylus

onto

the

record.

10

Muting

switch

Tape

monitor

switch

Tape

duplicate

switch

Function

selector

Mode

selector

Subsonic

filter

switch

e

Set

the

subsonic

filter

switch

to

15Hz

when

-

there

is

a

great

deal

of

noise

in

the

low-

frequency

region

or

when

the

bass

speaker’s

diaphragm

moves

even

though

no

sound

can

be

heard

during

a

performance.

e

Do

not

cause

the

turntable

to

vibrate

while

a

record

is

being

played

since

this

will

cause

the

stylus

to

jump

and

scratch

the

record.

Do

not

turn

off

the

power

if

the

stylus

is

still

tracing

grooves

on

the

record.

LISTENING

TO

THE

BROADCAST

1.

Set

the

function

selector

to

TUNER.

2.

Operate

the

tuner

and

tune

in

to

the

desired

station.

3.

Adjust

the

volume

with

the

volume

control.

4.

Set

the

tone

switch

to

ON

in

line

with

your

preference

and

adjust

the

tone

with

the

tone

controls.

USING

THE

AUX

JACKS

1.

Set

the

function

selector

to

AUX.

2.

Operate

the

audio

component

which

you

have

connected

to

the

AUX

jacks.

3.

Adjust

the

volume

with

the

volume

control.

4,

Set

the

tone

switch

to

ON

in

line

with

your

preference

and

adjust

the

tone

with

the

tone

controls.