Sony ST-JX401 User manual

Table of contents

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SONY

3-751-442-21

(1)

FM

Stereo/FM-AM

Tuner

ST-JX401

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

these

numbers

whenever

you

call

upon

your

Sony

dealer

regarding

this

product.

Model

No.

ST-JX401

Serial

No__

WARNING

To

prevent

fire

or

shock

hazard,

do

not

expose

the

unit

to

rain

or

moisture.

CAUTION

B'SK

OF

ELECTRIC

SHOCK

DO

NO

T

OPEN

CAUTION

TO

REDUCE

THE

RISK

OF

ELECTRIC

SHOCK

DO

HOT

REMOVE

COVER

tOR

BACK)

NO

USER-SERVICEABLE

PARTS

INSIDE

REFER

SERVICING

TO

QUALIFIED

SERVICE

PERSONNEL

a

This

symbol

is

intended

to

alert

the

user

to

/m\

the

presence

of

uninsulated

“dangerous

yt

\

voltage”

within

the

product’s

enclosure

/

I

\

that

may

be

of

sufficient

magnitude

to

/

v

\

constitute

a

risk

of

electric

shock

to

persons.

A

This

symbol

is

intended

to

alert

the

user

to

A

i

-

the

presence

of

important

operating

and

/

I

\

maintenance

(servicing)

instructions

in

/

■

\

theliteratureaccompanyingtheappliance.

Precautions

On

safety

•

Operate

the

unit

only

on

120

V

AC,

60

Hz.

•

Should

any

solid

object

or

liquid

fall

into

the

cabinet,

unplug

the

unit

and

have

it

checked

by

qualified

personnel

before

operating

it

any

futher.

•

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

•

Place

the

unit

on

a

level

surface.

•

Do

not

install

the

unit

near

heat

sources

such

as

radiators

or

air

ducts,

or

in

a

place

subject

to

direct

sunlight,

excessive

dust,

mechanical

vibration

or

shock.

•

Good

ventilation

is

essential

to

prevent

internal

heat

build-up

in

the

unit.

Place

the

unit

in

a

location

with

adequate

air

circulation.

Do

not

place

the

unit

on

a

soft

surface.

On

cleaning

Clean

the

cabinet

periodically

with

a

soft

dry

cloth.

If

the

stains

are

difficult

to

remove,

use

a

cloth

moistened

with

a

mild

detergent

solution.

Do

not

use

solvents

such

as

alcohol,

benzine

or

thinner,

since

they

wilt

damage

the

finish.

On

repacking

Do

not

throw

away

the

carton

and

packing

materials.

It

makes

an

ideal

container

in

which

to

transport

the

unit.

If

you

have

any

questions

or

problems

concerning

your

unit

that

is

not

covered

in

this

manual,

please

consult

your

nearest

Sony

dealer.

For

detailed

precautions,

see

the

leaflet

“IMPORTANT

SAFEGUARDS”.

PROPERTY

OF

THE

RATIONAL

TECHNICAL

CEPT.

f

|

L

t

L(Ji'

%

Do

not

remi

vj

©

1990

by

Sony

Corporation

Troubleshooting

Guide

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

Cause

Remedy

No

sound

Switches

of

the

amplifier

are

wrongly

set.

Set

them

correctly.

Unable

to

receive

stored

stations

Frequency

is

incorrectly

stored.

Store

the

correct

frequency.

STEREO

indicator

blinks

Antenna

direction

and

location

are

not

correct.

Check.

Different

frequency

is

used

from

that

of

the

broadcasting

station.

Set

to

the

correct

frequency.

Signal

is

too

weak.

Connect

an

external

antenna

for

FM.

Too

many

noises

Picking

up

noises

from

other

electrical

apparatus.

Move

the

tuner

and

antenna

lead-in

wire

away

from

the

noise

sources.

Antenna

direction

and

location

are

not

correct.

Check.

Antenna

wire

collects

unnecessary

radio

waves

or

noises.

Replace

it

with

a

coaxial

cable.

There

are

working

TVs,

transceivers

and

amateur

wireless

units

in

the

vicinity.

Do

not

use

noise-producing

apparatus

near

the

tuner.

One

antenna

is

used

for

more

than

two

tuners,

or

with

a

TV

set.

Use

a

distributer.

Unable

to

scan

stored

stations

TUNING

knob

is

not

operated.

First

press

the

MEMORY

SCAN

button

and

then

turn

the

TUNING

knob.

Specifications

4

4

FM

tuner

Frequency

range

87.5

—

108

MHz

Antenna

terminal

300

ohms,

balanced

75

ohms,

unbalanced

IF

10.7

MHz

Sensitivity

S/N

50

dB

sensitive

Mono

22.1

dBf

(7

mV)

Stereo

42.1

dBf

(70

mV)

Usable

sensitivity

(IHF)

19.5

dBf

(5

mV)

Signal-to-noise

ratio

80

dB

(mono),

75

dB

(stereo)

Harmonic

distortion

0.3%

(mono),

0.5%

(stereo)

at

1

kHz

Separation

40

dB

(1kHz)

Frequency

response

30

Hz

—

15

kHz

-20

dB

Selectivity

55

dB

(400

kHz)

AM

suppression

ratio

54

dB

Image

response

ratio

50

dB

IF

response

ratio

90

dB

Spurious

response

ratio

70

dB

Automatic

tuning

threshold

17.8

mV

(30

dBf)

Output

775

mV,

4.7

kohms

(at

75

kHz

deviation)

AM

tuner

Frequency

range

530

—

1,710

kHz

(10

kHz)

531

-

1,710

kHz

(9

kHz)

Antenna

Loop

antenna,

External

antenna

terminal

IF

450

kHz

Sensitivity

(999

kHz

or

1,000

kHz)

500

^V/m

(when

the

loop

antenna

is

in

use)

Signal-to-noise

ratio

54

dB

(mono,

normal)

Harmonic

distortion

0.5%

(mono,

normal)

Selectivity

35

dB

(9

kHz,

normal)

38

dB

(10

kHz,

normal)

Frequency

response

40

Hz

—

3.5

kHz

+«

dB

(normal)

General

Power

requirements

Power

consumption

Dimensions

Weight

120

V

AC,

60

Hz

8

W

Approx.

430

x

80

x

265

mm

(w/h/d)

(17x3y

4

x10%

inches)

Approx.

2.4

kg

(5

lb

5

02

)

Supplied

accessories

Remote

control

cord

(1)

Connecting

cord

(1)

FM

wire

antenna

(1)

AM

loop

antenna

(1)

i

Sony

Corporation

Printed

in

Japan

Design

and

specifications

subject

to

change

without

notice.

Connections

CONTROL

S

OUT

r

jmmm

OUTPUT

CONTROLS

IN

TUNER

IN

CONTROL

S

OUT

—Note

to

CATV

system

Installer-

This

reminder

is

provided

to

call

the

CATV

system

installer’s

attention

to

Article

820-22

of

the

NEC

that

provides

guidelines

for

proper

grounding

and,

in

par¬

ticular,

specifies

that

the

cable

ground

shall

be

connected

to

the

grounding

system

of

the

building,

as

close

to

the

point

of

cable

entry

as

practical.

Notes

on

Connections

•

Connect

the

AC

power

cord

last.

Make

sure

power

is

off.

•

Cord

plugs

and

jacks

are

color

coded.

Red

plugs

and

jacks

are

for

right

channel

(R)

and

white

ones

for

left

channel

(L).

•

The

cable

connectors

should

be

fully

Inserted

into

the

jacks.

A

loose

connection

may

cause

hum

and

noise.

•

Keep

speaker

cords,

connecting

cords

and

power

cords

away

from

the

AM

loop

antenna

and

the

tuner’s

antenna

lead-in

to

avoid

possible

noise

pickup.

•

AM

loop

antenna

(supplied)

If

necessary,

attach

the

antenna

to

a

wall.

For

better

AM

reception

#

CONTROL

S

connector

(4-pin,

supplied)

IN:

Connect

to

the

CONTROL

S

OUT

connector

of

the

Sony

TA-AX401

/TA-AV601

f\

A-AV501

amplifier

for

whole

audio

system

remote

control.

OUT:

Connect

to

the

CONTROL

S

IN

connector

of

other

Sony

equipment

with

the

4-pin

flat

remote

control

cord

for

whole

audio

system

remote

control.

Insulated

wire

Extend

a

6

to

15-meter

insulated

wire

out

of

doors.

(It

is

also

necessary

to

connect

the

supplied

AM

loop

antenna)

1

1

•

AC

OUTLET

Use

this

outlet

to

power

another

audio

component

whose

power

consumption

is

less

than

100

watts.

The

outlet

is

not

controlled

by

the

POWER

switch

of

the

tuner.

It

will

continually

supply

power

to

any

unit

connected.

#

Antenna

Ground

To

prevent

hum,

connect

the

ground

wire

to

ANTENNA

ground

terminal

(

rtr

).

When

an

outdoor

antenna

is

installed,

be

sure

to

connect

the

ground

wire

for

lightning

protection.

To

change

the

AM

tuning

interval

Note

The

AM

tuning

interval

is

preset

at

the

factory

to

10

kHz

When

the

interval

is

changed,

all

preset

stations

which

to

match

the

frequency

allocation

system

of

your

you

have

memorized

using

the

numeric

buttons

will

be

country.

To

change

the

interval

to

9

kHz,

proceed

as

erased

from

the

memory.

After

changing

the

interval,

be

follows.

sure

to

preset

the

stations

again.

1

Depress

the

POWER

switch

to

turn

on

the

unit.

2

Set

the

BAND

FM/AM

selector

to

AM.

3

Press

the

POWER

switch

to

turn

off

the

unit.

4

Hold

the

TUNING

knob

in

the

“

+

”

position,

and

depress

the

POWER

switch

to

turn

on

the

unit.

To

reset

the

interval

to

10

kHz,

follow

the

same

procedure.