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SONTY.

Graphic

Equalizer

3-756-657-21(1)

SEQ-431

Operating

Instructions

Before

operating

the

unit,

please

read

this

manual

thoroughly

and

retain

it

for

future

reference.

OWNER'S

RECORD

The

model

and

serial

numbers

are

located

at

the

rear.

Record

the

serial

number

in

the

space

provided

below.

Refer

to

them

whenever

you

call

upon

your

Sony

dealer

regarding

this

product.

_

Model

No.

SEQ-431

To

prevent

fire

or

shock

hazard,

do

not

expose

the

unit

to

rain

or

moisture.

Serial

No.

RISK

OF

ELECTRIC

SHOCK

DO

NOT

OPEN

CAUTION:

TO

REDUCE

THE

RISK

OF

ELECTRIC

SHOCK,

DO

NOT

REMOVE

COVER

(OR

BACK).

NO

USER-SERVICEABLE

PARTS

INSIDE.

REFER

SERVICING

TO

QUALIFIED

SERVICE

PERSONNEL.

This

symbol

is

intended

to

alert

the

user

to

the

presence

of

uninsulated

“dangerous

voltage”

within

the

prod-

uct’s

enclosure

that

may

be

of

suffi-

cient

magnitude

to

constitute

a

risk

of

electric

shock

to

persons.

This

symbol

is

intended

to

alert

the

user

to

the

presence

of

important

operating

and

maintenance

(servicing)

instructions

in

the

literature

accompa-

nying

the

appliance.

*

The

graphical

symbols

are

on

the

rear

enclosure.

©

1993

by

Sony

Corporation

ad

ayers

Lelie)

ats

On

safety

©

Operate

the

unit

only

on

120

V

AC,

60

Hz.

e

The

unit

is

not

disconnected

from

the

AC

power

source

as

long

as

it

is

connected

to

the

wall

outlet,

even

if

the

unit

itself

has

been

turned

off.

¢

Should

any

solid

object

or

liquid

fall

into

the

unit,

unplug

it

and

have

it

checked

by

qualified

personnel

before

operating

it

any

further.

e

Unplug

the

unit

from

the

wall

outlet

if

it

is

not

to

be

used

for

an

extended

period

of

time.

To

disconnect

the

cord,

pull

it

out

by

grasping

the

plug.

Never

pull

the

cord

itself.

On

installation

¢

Do

not

install

the

unit

in

a

location

near

heat

sources

such

as

radiators

or

air

ducts,

or

in

a

place

subject

to

direct

sunlight,

excessive

dust,

mechanical

vibration

or

shock.

¢

Good

air

circulation

is

essential

to

prevent

internal

heat

buildup

in

the

unit.

Place

the

unit

in

a

location

with

adequate

air

circulation.

Do

not

place

the

unit

on

a

soft

surface.

On

cleaning

the

cabinet

Clean

the

cabinet,

panel

and

controls

with

a

soft

cloth

lightly

moistened

with

mild

detergent

solution.

Do

not

use

any

type

of

abrasive

pad,

scouring

powder

or

solvent

such

as

alcohol

or

benzine.

On

repacking

Do

not

throw

away

the

carton

and

the

packing

material.

It

makes

an

ideal

container

to

transport

the

unit

in.

For

the

customers

in

the

U.S.A.

For

detailed

precautions,

see

the

leaflet

“IMPORTANT

SAFEGUARD”.

If

you

have

any

question

or

problem

concerning

your

unit,

please

consult

your

nearest

Sony

dealer.

For

the

customers

in

Canada

CAUTION

TO

PREVENT

ELECTRIC

SHOCK,

DO

NOT

USE

THIS

POLARIZED

AC

PLUG

WITH

AN

EXTENSION

CORD,

RECEPTACLE

OR

OTHER

OUTLET

UNLESS

THE

BLADES

CAN

BE

FULLY

INSERTED

TO

PREVENT

BLADE

EXPOSURE.

Connections

Connecting

to

the

ADAPTOR

Jacks

of

Amplifier

¢

Connect

the

AC

power

cord

last.

Make

sure

power

is

off.

¢

The

cable

connectors

should

be

fully

inserted

into

the

jacks.

A

loose

connection

may

cause

hum

and

noise.

*

Cord

plugs

and

jacks

are

color

coded.

Red

plugs

and

jacks

are

for

right

channel

(R)

and

white

ones

for

the

left

channel

(L).

Amplifier

AC

OUTLET

Use

the

AC

outlet

to

power

audio

component

whose

power

consumption

is

less

than

the

wattage

indicated

on

the

AC

OUTLET.

The

outlet

is

not

controlled

by

the

POWER

switch.

Even

when

the

apparatus

is

switched

off,

"UNSWITCHED"

socket

outlet

remains

live

unless

mains

plug

is

pulled

out

from

the

wall

outlet.

SEQ-431

to

an

AC

outlet

of

the

amplifier

or

a

wall

outlet

CAUTI

Do

not

connect

any

electrical

home

appliances

such

as

an

electric

iron,

fan,

TV

or

other

high

wattage

equipment

to

the

AC

outlet.

Cassette

deck

LINE

OUT

aap

to

an

AC

outlet

of

the

amplifier

or

a

wall

outlet

Cassette

deck

LINE

IN

2

Select

the

desired

source

with

the

amplifier

and

play

the

program

source,

or

play

back

a

tape

on

the

cassette

deck.

e

4

Press

the

volume

level

of

|

EQUALIZATION

button

EQUALIZATION

indicator

lights

up.

1

Select

the

input

signal

to

be

equalized.

For

the

program

source

from

the

TAPE:

-O

amplifier:

G)

Press

the

TAPE

button

so

that

the

_

TAPE

indicator

goes

off.

|

Note

_

When

connecting

to

the

TAPE

jacks

of

_

the

amplifier,

set

the

tape

monitor

~

switch

to

ON.

La3f

eS

TAPE

—O

:

a

e

For

the

sound

from

the

cassette

(.)

|

deck:

|

Press

the

TAPE

button

so

that

the

_

TAPE

inidcator

lights

up.

eed

+10

|

bt

t~

+10

0

0

-10

—

L=

-10

6

Hz

150Hz

400

Hz

TkHz

24kHz

6

kHz

14

KHZ

Te

Or

Gr

To

listen

to

the

sound

without

the

equalize:

Press

the

EQUALIZATION

button

so

that

the

il

goes

off.

The

input

signal

is

directly

output

to

LINE

OUT

and

TAPE

RECORDER

REC

OUT

je

2

Select

and

play

the

desired

source.

1

Press

the

TAPE

button

so

that

the

TAPE

indicator

goes

off.

3

Press

the

EQUALIZATION

button

so

that

the

EQUALIZATION

indicator

lights

up.

Nie-

P

EQUALIZATION

5

Set

the

cassette

deck

to

recording

mode.

To

record

sound

without

the

equalizer

effect

Press

the

EQUALIZATION

button

so

that

the

indicator

goes

off.

60

Hz

150Hz

400

Hz

kHz

24kHZ

6

kHz

14

kHz

Frequency

Coverage

of

=F-(olam

el

Ur-1jr4-m

Orelalige)|

Adjustable

frequency

bands

and

the

effect

of

level

adjustment

60

Hz:

Lowering

the

level

will

cut

the

ventilation

noise

of

a

music

hall,

hum

of

electronic

instruments,

boomy

bass,

etc.

Raising

the

level

will

reinforce

the

heavy

bass

part

of

a

pipe

organ

or

add

depth

to

the

bass

sound.

150

Hz:

Boosting

or

cutting

the

normal

bass.

400

Hz:!ncreasing

or

decreasing

the

power,

spaciousness

and

warmth

of

the

sound.

1

kHz:

Providing

more

presence

for

vocals,

and

moving

the

sound

forward

or

into

the

background.

2.4

kHz:

Lowering

the

level

will

reduce

stridency,

and

raising

will

make

the

base

sound

brighter.

6

kHz:

Increasing

or

decreasing

the

brightness

of

the

sound;

for

example,

raising

the

level

will

make

the

violin

sound

silky

smooth.

14

kHz:

Changing

the

general

atmosphere

rather

than

the

sound

itself.

Raising

the

level

will

highlight

the

delicate

quality

of

instrumental

sound,

and

lowering

will

reduce

high-frequency

noise

such

as

the

resonant

peak

of

a

cartridge

tape

hiss,

etc.

Checking

the

equalization

results

Press

the

EQUALIZATION

button

again

to

off

(released

position).

The

equalizer

circuit

is

bypassed,

and

you

can

hear

the

sound

without

equalization.

By

switching

the

EQUALIZATION

button

on

and

off,

compare

the

results.

The

spectrum

analyzer

can

be

used

to

visually

confirm

the

need

for

and

effect

of

equalizer

adjustment.

SY

of

=Yol

bi

Cer-

1a

(e]

at)

Inputs

LINE

IN:

Phono

jacks,

245

mV

(-10

dBs),

50

kilohms

TAPE

IN:

Phono

jacks,

245

mV

(-10

dBs),

50

kilohms

Outputs

LINE

OUT:

Phono

jacks,

245

mV

(-10

dBs),

Load

impedance:

more

than

10

kilohms

TAPE

REC

OUT:

Phono

jacks,

245

mV

(-10

dBs),

Load

impedance:

more

than

10

kilohms

Graphic

equalizer

Boost/cut

range:

+10

dB

Center

frequencies:

60

Hz,

150

Hz,

400

Hz,

1

kHz,

2.4

KHz,

6

KHz,

14

KHz

Frequency

response

(with

EQUALIZATION

on)

LINE

IN:

20

Hz

to

40

kHz

*°,dB

Harmonic

distortion

LINE

IN:

Less

than

0.008%

(at

1

kHz,

1

V

output)

Signal-to-noise

ratio

(with

EQUALIZATION

on)

LINE

IN:

Better

than

100

dB

(A

network,

1

V

output)

Power

requirements

120

V

AC,

60

Hz

Power

consumption

5W

1

unswitched,

120

W/1

A

max.

Approx.

430

x

80

x

265

mm

(w/h/d)

(17x

3'/,

x

10

‘/,

inches)

Mass

Approx.

2.5

kg

(5

Ib

8

oz)

Accessory

supplied

Audio

connecting

cords

(2)

AC

outlet

Dimensions

Design

and

specifications

are

subject

to

change

without

notice.

Troubleshooting

Before

going

through

the

check

list

below,

first

refer

back

to

the

connection

and

operating

procedures.

Should

any

problem

persist

after

you

have

made

these

checks,

consult

your

nearest

Sony

dealer.

Trouble

No

audio

even

when

the

POWER

switch

is

turned

on.

Remedy

e

Check

if

the

power

cord

is

disconnected.

¢

Check

if

the

connecting

cord

is

disconnected.

¢

Check

the

TAPE

button

setting.

No

equalization.

e

Check

if

the

EQUALIZATION

button

is

set

to

off

(the

indicator

goes

off).

e

Check

the

connections.

The

program

source

connected

to

the

amplifier

cannot

be

recorded.

Sony

Corporation

Printed

in

Japan

¢

Check

if

the

TAPE

button

is

set

to

on

(the

indicator

lights

up).