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SON'Y.

Power

Amplifier

MU-A400

MU-A200

—

:

Operating

Instructions

.,..:

Before

operating

the

unit,

please

read

this

manual

thoroughly

and

retain

it

for

future

reference.

Mode

d’emplol

pace

Avant

la

mise

en

service

de

cet

appareil,

veuillez

lire

attentivement

ce

mode

d’emploi

et

le

conservez

pour

toute

référence

ultérieure.

:

Bedienungsanleitung

sei

2

Lesen

Sie

vor

der

Inbetriebnahme

diese

Anleitung

sorgfaltig

durch

und

bewahren

Sie

sie

zum

spateren

Nachschlagen

gut

aul.

©1991

by

Sony

Sound

Tec

Corp.

WARNING

English

To

prevent

fire

or

shock

hazard,

do

not

expose

the

unit

to

rain

or

moisture.

To

avoid

electrical

shock,

do

not

open

the

cabinet.

Refer

servicing

to

qualified

personne!

only.

NOTICE

FOR

THE

CUSTOMERS

IN

THE

UNITED

KINGDOM

THIS

APPARATUS

MUST

BE

EARTHED

IMPORTANT

The

wires

in

this

mains

lead

are

coloured

in

accordance

with

the

following

code:

Green-and-yellow:

Earth

Blue:

Neutral

Brown:

Live

As

the

colours

of

the

wires

in

the

mains

lead

of

this

apparatus

may

not

correspond

with

the

coloured

markings

identifying

the

terminals

in

your

plug

proceed

as

follows:

The

wire

which

is

coloured

green-and-yellow

must

be

connected

to

the

terminal

in

the

plug

which

is

marked

by

the

letter

E

or

by

the

safety

earth

symbol

+

or

coloured

green

or

green-and-yellow.

The

wire

which

is

coloured

blue

must

be

connected

to

the

terminal

which

is

marked

with

the

letter

N

or

coloured

black.

The

wire

which

is

coloured

brown

must

be

connected

to

the

-

terminal

which

is

marked

with

the

letter

L

or

coloured

red.

Ble)

(=

me)

m

Ore)

a)

(Jae

PIEGAUTIONS

owssddiesces

facades

ch

eesti

ciet

cesaee

loep

eoustaasbdevaceasscesiesee

Specifications

............cccsccessseeeeseneseenseseseeees

Block

Diagrams

DiMe@NSIONS.

.............:csccceesreeeescceeseceeenreees

Location

and

Function

of

Controls

Connection

Examples

...........-ssccsees

Troubleshooting

Guide

...............:eeeeeee

Precautions

On

Installation

Avoid

installing

or

leaving

the

unit

in

a

location:

¢

near

heat

sources

such

as

radiators,

airducts

or

heaters

®

subject

to

direct

sunlight

:

©

exposed

to

rain

or

moisture

e

where

it

is

unventilated

©

exposed

to

excess

dust

or

dirt

*

subject

to

mechanical

vibration

or

shock

On

Operation

©

Operate

the

unit

only

on

220-240

V

AC,

50/60

Hz.

¢

Unplug

the

unit

from

the

wali

outlet

when

it

is

not

to

be

used

for

an

extended

period

of

time.

To

disconnect

the

cord,

pull

~

it

out

by

grasping

the

plug.

Never

take

out

the

plug

by

puiling

on

the

cord.

;

©

Should

any

solid

object

or

liquid

fall

into

the

component,

unplug

the

unit

and

have

it

checked

by

qualified

personnel

before

using

it

again.

¢

Clean

the

cabinet,

panel

and

knobs

periodically

using

a

soft

cloth

moistened

with

a

miid

detergent.

Never

use

an

abrasive

cleanser

or

chemical

solvents

as

they

may

mar

the

finish.

If

you

have

any

questions

or

problems

concerning

your

unit

that

are

not

covered

in

this

manual,

please

consult

your

nearest

Sony

dealer.

Specifications

Channel

2

channels

Input

sensitivity

OdBs

(100W

+100W,

8

ohm

load

impedance,

both

channels

driven

simultaneously)

Unbalanced

Electronic

balanced

circuit

More

than

33

kilo-ohms

(stereo

operation)

More

than

33

kilo-ohms

(monaural

operation)

Connector

and

XLR-3-31

type

XLR-3-31

type

jack

Phono

type

|

__item

——|Stereo

|

Monaural

(BTL)

Output

terminal

Screw

type

binding

terminal

Rated

output*

MU-A400

260

W

+

260

W

520

W

(16

ohms)

(8

ohms)

800

W

(8

ohms)

400

W

+

400

W

(4

ohms)

(both

channels

driven

simultaneously)

Input

impedance

130

W

+130

W

(8

ohms)

200

W

+

200

W

(4

ohms)

(both

channels

driven

simultaneously)

Power

bandwidth

20

Hz

-

20

kHz+0.5

dB

Damping

factor

|

More

than

150

(8

ohms,

1kHz)

Harmonic

Less

than

0.1%

|

Less

than

0.1%

distortion

(8ohms,

at

100

W

|

(8

ohms,

at

200

W

output)

output)

More

than

70

dB

(1kHz:

8

ohms

load,

at

rated

output)

260

W

(16

ohms)

400

W

(8

ohms)

Channel

separation

Residual

noise

|

Less

than

100

)V

|

Less

than

200

pV

(IHF-A,

input

(IHF-A,

input

terminated)

terminated)

31

4B

Stacking

output

0

dBs=

0.775

V

“1

%

harmonic

distortion

at

1kHz

Indicator

10-point

LED

level

meter

PROTECTION

indicator

HIGH

TEMP

indicator

CLIP

indicator

POWER

indicator

Power

requirements

220

-

240

V

AC,

50/60

Hz

Power

consumption

§MU-A400:

805

W

MU-A200:

425

W

Dimensions

MU-A400:

Approx.

482

x

146

x

490

mm

(w/h/d)

_

(19

x

4

9/6

x

19

5s

inches)

MU-A200:

Approx.

482

x

102

x

490

mm

(w/h/d)

(19

x

4

Ve

x

19

/s

inches)

Weight

MU-A400:

Approx.

20.5

kg

_(45

Ibs

2

oz)

MU-A200:

Approx.

15

kg

(33

Ibs

2

02)

Accessories

supplied

AC

power

cord

(1)

Fuse

MU-A400:

8A

(1)

;

MU-A200:

4A

(1)

This

appliance

conforms

with

EEC

Directive

87/308/EEC

regarding

interference

suppression.

Design

and

specifications

are

subject

to

change

without

notice.

Block

Diagrams

PROTECTION

HIGH

TEMP

Z,

BAL/UNBAL

CY oY

OPERATION

CLIP

4

4

CH

1

MONO

INPUT

o——-——0

®

CH2

2

2

OUTPUT

MONO

cH.

o———0®

cHe

INPUT

f°

2

OUTPUT

CIRCUIT

PROTECTION

.

'

7

Fe

ix

fey)

BAL/UNBAL

SW.

OPERATION

SW

7

PROTECTION

HIGH

TEMP

BAL

MONO

o

—o~c—!

SAME

OUTo

UNBAL

STEREO

MU-A400

:

408.5

MU-A200

:

406.5

MU-A400

MU-A200

MU-A400

Unit:

mm

MU-A200

Moyer:

1d(olam-laleom

melaleiitela

me)

m@xe)ajice)

t=

Front

Panel.

[41]

CLIP

indicator

[2]

HIGH

TEMP

indicator

[3]

PROTECTION

indicator

[4]

OPERATION

indicator

[5]

ATTENUATOR

knob

[6]

Level

meter

POWER

switch

and

pilot

lamp

Ventilation

hole

a

ee

a

erg

cen

soa

oreamsstamammes

[1]

CLIP

indicator

(red)

Lights

when

the

output

wave

is

distorted.

When

the.

indicator

lights

frequently,

the

input

level

is

too

high

or

there

is

a

problem

in

the

input

channel.

[2]

HIGH

TEMP(temperature)

indicator

(red)

Lights

when

the

temperature

of

the

heat

sink

becomes

too

high.

Take

a

measure

to

be

well

ventilated.

[3]

PROTECTION

indicator

(red)

Lights

when

the

protection

circuit

is

working.

When

you

turn

on

the

amplifier,

the

indicator

lights

but

goes

off

when

the

unit

starts

to

work

steadily.

[4]

OPERATION

indicator

(green)

Shows

the

operation

mode

set

by

the

position

of

the

OPERATION

switch

on

the

rear

panel.

STEREO

SAME

OUT

Lights

Lights

See

2

has

the

same

signal

as

CHANNEL

1.

(monaural)

Monaural

through

BTL

[5]

ATTENUATOR

knob

CHANNEL

1

(MONO):

Turn

this

knob

to

control

the

channel

1

input

level.

You

can

control

the

input

level

with

this

knob

when

you

are

using

the

unit

as

a

monaural

amplifier

through

BTL.

CHANNEL

2:

Turn

this

knob

to

control

the

channel

2

input

level.

When

you

set

the

OPERATION

switch

on

the

rear

panel

to

MONO,

this

knob

does

not

function.

When

you

set

the

OPERATION

switch

on

the

rear

panel

to

SAME

OUT,

CHANNEL

1

and

CHANNEL

2

are

connected

(stacking

connection).

You

can

control

the

channel

1

input

level

with

the

ATTENUATOR

knob

on

the

CHANNEL

1

side,

and

the

channel

2

input

level

with

the

ATTENUATOR

knob

on

the

CHANNEL

2

side.

[6]

Level

meter

The

10-point

LED

level

meter

shows

OdB

at

8

ohms

load,

100

W

output.

POWER

switch

and

pilot

lamp

(green)

‘Press

this

switch

to

tum

on

the

amplifier.

The

pilot

lamp

lights

when

the

unit

is

turned

on.

CHANNEL

1

i

(Monaural)

)

edt

eo0000000090

paar

an

ere

er

eee

Ventilation

hole

Two

ventilation

holes

with

a

fan

are

located

on

both

sides

of

the

front

panel.

The

holes

are

covered

with

a

grill

and

a

cover.

When

the

grills

become

dusty,

the

fans

do

not

work

properly

and

the

HIGH

TEMP

indicator

starts

to

light

frequently.

In

this

case,

remove

the

ventilation

hole

cover

and

clean

the

grill.

Unplug

the

AC

power

cord

before

cleaning

the

grill.

Caution

Do

not

touch

the

interior

of

the

unit

when

you

remove

the

grill.

To

remove

the

ventilation

hole

cover

rill

Ventilation

hole

cover

(

CHANNEL

2

)

CHANNEL

2

Cup

ATTENUATOR

-0-

a.

13

O-

Ak

HGH

TEMP

comme

1-0-

™%

5 °

oe

aie,

*

*

.

.*O+

2

PROTECTION

*

.

PaOn

un

o

|.

.

“70>

5

OPERATION

=o

ae

a-O-

°

=

*

neO-

re

:

CHANNEL

1

and

CHANNEL

2

have

the

same

function.

Notes

on

the

PROTECTION

lamp.

When

does

the

PROTECTION

lamp

light?

The

PROTECTION

lamp

lights

when

the

protection

circuit

functions

to

protect

the

speakers

and

the

amplifier

by

cutting

off

the

output

in

the

following

cases:

¢

when

DC

(direct

current)

runs

through

the

OUTPUT

’

connectors

because

of

a

malfunction

of

the

amplifier.

¢

when

the

radiator

located

in

the

amplifier

exceeds

the

normal

temperature

(the

HIGH

TEMP

indicator

lights

continuously).

e

when

the

impedance

of

the

speaker

is

too

lov,

or

when

the

output

is

terminated.

In

these

cases,

tum

off

the

POWER

switch,

find

the

cause

and

resolve

the

problem.

Then

turn

onthe

POWER

switch

to

operate

the

amplifier.

To

put

back

the

grill

and

the

cover

1

Insert

the

grill

into

the

slot.

2

Insert

the

cover

into

he

slot.

§——

Put

backhe

Screws

and

tight

them.

|

Relor-)i(elem-lalomalislritie)

sme)

m

Ore

slice

|

Rear

Panel

[1]

INPUT

1(MONO)

connectors

and

STACKING

connector(CH1)

[2]

INPUT

2

connectors

and

STACKING

connector(CH2)

[1]

INPUT(MONO)

(input

1,

hohe)

and

STACKING

connectors

Connect

outputs

of

a

mixer

or

preamplifier.

When

you

are

using

the

unit

as

a

stereo

amplifier,

these

input

connectors

are

for

CHANNEL

1.

When

you

set

the

OPERATION

switch

to

SAME

OUT

or

MONO,

these

connectors

accept

monaural

input

signals.

INPUT

connector

(XLR-3-31

type):

Accepts

balanced

input

when

you

set

the

BAL/UNBAL

switch

to

BAL.

When

you

set

the

switch

to

UNBAL,

the

connector

accepts

unbalanced

input

(Number

2:

HOT).

INPUT

jacks

(phono

type,

unbalanced):

Accept

unbalanced

signals

when

you

set

the

BAL/UNBAL

switch

to

UNBAL.

Use

one

jack

for

input,

another

to

connect

another

amplifier

for

stacking

connection.

STACKING

connector

(XLR-3-32

type):

Feeds

out

the

signal

which

is

received

from

the

XLR

type

INPUT

connector.

Use

this

connector

to

connect

another

amplifier

for

stacking

connection.

[2]

INPUT

(input

2)

and

STACKING

connectors

Connect

outputs

of

a

mixer

or

preamplifier.

When

you

are

using

the

unit

as

a

stereo

amplifier,

these

input

connectors

are

for

CHANNEL

2.

When

you

set

the

OPERATION

switch

to

SAME

OUT

or

MONO,

these

connectors

are

disconnected.

INPUT

connector

(XLR-3-31

type):

Accepts

balanced

input

when

you

set

the

BAL/YUNBAL

switch

to

BAL.

When

you

set

the

switch

to

UNBAL,

the

connector

accepts

unbalanced

input

(Number

2:

HOT).

INPUT

jacks

(phono

type,

unbalanced):

Accept

unbalanced

signals

when

you

set

the

BAL/UNBAL

switch

to

UNBAL.

Use

one

jack

for

input,

another

to

connect

another

amplifier

for

stacking

connection.

STACKING

connector

(XLR-3-32

type):

Feeds

out

the

signal

which

is

received

from

the

XLR

type

INPUT

connector.

Use

this

connector

to

connect

another

amplifier

for

stacking

connection.

BAL/UNBAL

SS

a

INPUT

1

(MONO)

AINPUT

2

connectors

_

BAL

XLR

type

connector

1:GND

1:

GND

2:

HOT

2:HOr

3:

COLD

3:

GND

Phono

type

jack

XLR-3-12C

type

XLR-3-11C

type

Press

here

to

detach.

Fit.

Press

here

to

detac.

[3]

OPERATION

switch

Changes

the

operation

mode

of

the

unit

as

follows.

OPERATION

switch

Operation

mode

STEREO

[Stereo

SAME

OUT

signal.

BTL

Monaural

operation

through

BTL.

Select

the

position

of

this

switch

when

the

POWER

switch

is

turned

off.

Internal

stacking

operation

CHANNEL

2

has

the

same

signal

as

the

CHANNEL

1

input

[4]

OUTPUT

terminals

Connect

speakers.

Connect

the

+

speaker

terminal

to

the

red

terminal,

—

speaker

terminal

to

the

black

terminal.

When

the

unit

is

on

monaural

operation

through

BTL,

use

only

the

red

terminals.

Connect

the

+

speaker

terminal

to

the

red

terminal

on

the

OUTPUT

1

side,

—

speaker

terminal

to

the

red

terminal

on

the

OUTPUT

2

side.

[5]

[6]

[3]

OPERATION

switch

[4]

OUTPUT

terminals

15]

BAL/UNBAL

switch

'6]

FUSE

holder

.

Ventilation

hole

BAL/UNBAL

(balanced/unbalanced)

switch

—

When

you

set

the

switch

to

BAL,

the

unit

feeds

in

the

input

signal

from

the

source

connected

to

the

XLR

type

INPUT

connector.

When

you

set

the

switch

to

UNBAL,

the

unitfeeds

in

the

input

signal

from

the

source

connected

to

the

XLR

type

INPUT

connector*

or

to

the

phono

type

INPUT

jacks.

You

can

make

a

stacking

connection

with

another

amplifier

since

these

input

connectors

are

inparallel

connection.

*(n

this

case,

the

XLR

type

INPUT

connector

accepts

unbalanced

input

(Number

2:

HOT).

FUSE

holder

There

is

a

fuse

to

prevent

damage

from

excessive

current.

Current

capacity

is

8A

for

the

MU-A400

and

4A

for

the

MU-A200.

When

you

replace

the

fuse,

be

sure

to

use

one

with

the

same

capacity.

~AC

IN

(inlet)

Connect

the

AC

power

cord

supplied.

The

tnit

operates

on

220-240V

AC,

50/60

Hz.

By

using

the

mounting

parts

on

both

sides,

you

can

install

the

unit

in

an

EIA

standard

19-inch

rack.

If

you

install

various

pieces

of

equipment

one

upon

another,

remove

the

unit’s

bottom

support.

To

remove,

pull

out

the

screws

of

the

supports,

by

using

a

screwdriver.

-

OFe}

aT

at=red

te)

=>

¢-1a1]

e)

(=1>

Connection

Notes.

On

power

sources

To

avoid

damaging

the

unit

or

to

prevent

the

circuit

breaker

from

working

accidentally:

*

Use

an

extension

cord

that

can

bear

10A

current.

*

Do

not

connect

many

pieces

of

equipment

to

the

same

AC

outlet.

|

Using

the

Unit

as

a

Stereo

Amplifier”

OPERATION

switch

on

STEREO

Mixer,

preamplifier,

etc.

10

Impedance

more

than

4

ohms

On

connecting

cables

¢

The

power

cord

should

be

connected

last.

First

make

sure

that

the

POWER

switch

is

turned

off.

*

The

cable

connectors

should

be

fully

inserted

into

the

jacks.

A

loose

connection

may

cause

hum

and

noise.

*

Unplug

the

cord

from

the

wall

outiet

by

grasping

the

plug.

Never

take

out

the

plug

by

pulling

on

the

cord.

_

Speaker

Speaker

Impedance

more

than

4

ohms