Yamaha MX-50 Manual de usuario

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"EMPLOI

MODE

MANUAL

OWNER

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Connection

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Front

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Thank

you

for

purchasing

the

YAMAHA

MX-50

stereo

power

amplifier.

ABOUT

THIS

MANUAL

obtain

the

finest

performance

from

your

new

power

amplifier,

please

read

this

manual

carefully,

keeping

handy

for

future

reference.

After

vou

know

which

PRECAUTIONS

take,

the

section

CON-

NECTIONS

will

show

you

how

hook

the

MX-50

your

control

amplifier

and

speakers.

Operation

this

power

amplifier

explained

under

FRONT

PANEL

CONTROLS

AND

THEIR

FUNCTIONS.

you

have

any

trouble,

the

final

section

TROUBLESHOOTING

tells

you

what

before

contacting

your

YAMAHA

dealer.

CONTENTS

IMPORTANT:

Please

record

the

serial

number

your

unit

the

space

below.

Model:

MX-50

Serial

No.:

FEATURES

Hyperbolic

Conversion

Class

Circuit

High

Dynamic

Power

Two-Pair

Speaker

Support

LED

Power

Level

Meters

Overload

Protection

Circuitry

Hyperbolic

Conversion

Class

Circuit

This

new

kind

circuitry,

developed

Yamaha,

eliminates

the

only

serious

drawback

Class

operation

amplifiers.

These

had

switch

non-linear

class

operation

above

certain

load

current,

causing

slight

deterioration

the

otherwise

excellent

sound

quality.

The

new

Hyperbolic

Conversion

Class

circuit

does

away

with

this

problem,

allowing

your

Yamaha

MX-50

deliver

pure

class

operation

constantly,

without

switching

cut-off,

over

its

entire

power

range.

Keep

this

manual

safe

place

for

future

reference.

Avoid

placing

your

MX-50

direct

sunlight

source

heat

Also

avoid

io-

cations

which

the

device

likely

subjected

excessive

dust,

cold

mois-

ture.

The

openings

the

cabinet

ensure

the

ventilation

the

amplifier.

these

openings

are

obstructed,

the

temperature

inside

the

cabinet

will

rise

rapidly

and

eventually

damage

the

circuits.

Therefore,

avoid

plac-

ing

objects

against

these

openings

and

not

install

your

amplifier

place

such

that

the

flow

air

through

the

ventilation

openings

could

impeded.

ASO

Së

Power

cord

When

removing

the

power

plug

from

the

wall

outlet,

always

pul!

directly

the

plug.

Never

yank

the

cord

this

may

result

damage

the

cord

and

possibly

short-circuit.

you

not

intend

use

this

unit

for

extended

period

time,

advisable

unplug

the

power

cord.

Switches

and

knobs

Avoid

applying

excessive

force

the

switches

and

knobs.

Relocation

Before

moving

your

amplifier,

sure

unplug

the

power

cord

and

remove

all

other

connecting

cables.

Troubleshooting

Chart

Consult

the

Troubleshooting

Chart

for

advice

the

common

operation

errors

before

concluding

that

your

amplifier

faulty.

Servicing

not

open

the

cabinet

attempt

make

repairs

yourself,

this

may

aggravate

the

damage

and

expose

you

electrical

shock.

Object

and

liquid

entry

See

that

foreign

objects

spilled

liquids

not

enter

inside

the

cabinet.

Should

this

case

arise,

consult

your

YAMAHA

dealer.

Wipe

off

dust

with

dry

soft

cloth.

remove

dirt

fingermarks,

use

soft

damp

cloth

then

dry

immediately

with

clean

cloth.

not

use

alcohol,

thinners

other

chemical

solvents

since

they

may

damage

the

finish

remove

the

panei

lettering.

not

use

any

aerosol

sprays

near

this

unit

these

products

can

easily

get

into

the

unit

and

damage

the

circuitry.

Special

instructions

for

the

U.K.

THE

WIRES

THE

MAINS

LEAD

ARE

COLOURED

ACCORDANCE

WITH

THE

FOLLOWING

CODE:

Blue:

NEUTRAL

Brown:

LIVE

the

colours

the

wires

the

mains

lead

this

apparatus

may

not

correspon

with

the

coloured

markings

identifying

terminals

your

plug,

proceed

follow:

The

wire

which

coloured

BLUE

must

connected

the

terminal

which

marke

with

the

letter

coloured

BLACK.

Th:

wire

which

coloured

BROWN

must

connected

the

terminal

which

marke

with

the

letter

coloured

RED.

CONNECTION

DIAGRAM

SCHEMA

DES

CONNEXIONS

€

CONTROL

AMPLIFIER

AMPLIFICATEUR

CONTROLE

HAUPTVERSTARKER

KONTROLLFORSTARKARE

AMPLIFICATORE

CONTROLLO

GUA

mins

ans

num

PREOUT

YAMAHA

viso

ESOWATTS

SOHz

YAMAHA

CORPORATION

110

(LL.

ANSCHLUBDIAGRAMM

SCHEMA

COLLEGAMENTO

KOPPLINGSDIAGRAMMET

SPEAKERS

ENCEINTES

HÔGTALARNA

SPEAKER

ARES

Ai.

s É

€

CES

Gë

Ras

GË

DAB

‘SPEAK

HAUT

PAR

See

HALIT-RAA

CSC

ESTER

Où

hé

LÉ

SPEAKERS

ENCEINTES

HOGTALARNA

SPEAKER

LAUTSPRECHERBOXENPAAR

CONNECTIONS

CONTROL

AMPLIFIER

SPEAKERS

NOTE:

Before

making

altering

any

the

connections

described

below,

sure

turn

off

the

power

the

MX-50.

Making

sure

that

the

control

amplifier

also

turned

off,

connect

the

output

jacks

your

control

amplifier

the

corresponding

INPUT

jacks

the

rear

panel

this

unit.

Always

check

that

the

RCA

plugs

the

connecting

cord

are

clean,

the

left

and

right

channels

both

units

correspond,

connections

are

secure,

and

both

units

are

properly

grounded.

possible,

use

only

speakers

indicated

the

rear

panel

the

SPEAKERS

terminals

and

with

adequate

power

handling

capacity.

Driving

speakers

with

extremely

low

impedance

(or

two

ohm

pairs)

full

power

may

cause

the

protection

circuit

activate.

When

connecting

the

speaker

cords,

observe

the

“+”

and

“—”

markings

the

backs

the

speakers

and

MX-50.

the

“+”

and

“_”

polarities

are

reversed,

the

sound

will

unnatural

and

lack

bass.

Speaker

cords

should

cut

short

possible.

notcoil

exces:

cord

bundle

with

cables

from

other

components.

Strip

approximately

(3/8”)

insulation

from

the

ends

the

speaker

cords:

Partly

unscrew

the

plastic

wire

holders.

Insert

th:

stripped

ends

the

speaker

cords

shown

and

retighten

the

holders.

RED

for

(+)

BLACK

for

(—)

FRONT

PANEL

CONTROLS

AND

THEIR

FUNCTIONS

The

Front

Panel

illustration

provided

page

32.

€

SPEAKERS

selector

switches:

Allow

you

select

one

or,

setting

both

switches

ON,

both

the

speaker

pairs

connected

the

and

terminals.

METER

switch:

Activates

the

power

peak

meter.

This

display

not

illuminated

when

the

METER

switch

the

OFF

position.

LEFT

and

RIGHT

LEVEL

controls:

These

give

you

independent

control

over

the

power

output

levels

the

and

speakers.

This

allows

you

preset

speaker

balance

for

optimum

stereo

imaging.

These

controls

can

also

serve

protect

speakers

with

power

handling

capacity

lower

than

this

amplifier’s

rated

output.

€

POWER

switch

and

indicator:

Pressing

this

switch

turns

power

on,

causing

the

POWER

indicator

light.

turn

the

unit

off,

press

again.

PROTECTION

indicator:

Lights

for

several

seconds

after

power

turned

on,

showing

that

the

internal

protection

circuitry

currently

activated.

This

mutes

the

output

signal

the

speakers,

preventing

the

loud

noise

otherwise

heard

when

switching

the

amplifier.

Power

peak

meter:

Indicates

the

power

output

logarithmically

compressed

scale

from

0.06

900

watts,

independently

for

the

left

and

right

output

channels.

Readings

are

accurate

for

ohm

speakers

only.

TROUBLESHOOTING

Before

assuming

that

your

amplifier

faulty,

check

the

following

list.

you

still

have

any

doubts

questions,

contact

your

nearest

YAMAH.

dealer.

power

even

when

the

The

power

cord

not

plugged

securely.

Plug

securely.

POWER

switch

ON.

sound

heard

from

the

left

The

speaker

cords

are

not

properly

connected.

Check

speaker

connections

and

correct

them.

and/or

right

speaker(s).

(s)

Either

both

LEVEL

controls

are

set

—

dB.

Adjust

the

appropriate

LEVEL

control(s).

The

cords

from

the

control

amplifier

are

notsecure.

Connect

them

securely.

The

control

amp's

balance

set

the

extreme

left

Adjust

the

control

amp's

balance

control.

right.

The

sound

ceases

suddenly,

The

speaker

protection

circuit

has

activated.

Turn

power

OFF,

then

again

resetthe

speake

and

the

PROTECTION

indicator

protection

circuit.

Alsó

see

CONNECTING

SPEAK

lit.

ERS

There

malfunction

the

amplifier.

Consult

your

YAMAHA

dealer.

Unnatural

sound

lacking

bass.

The

speaker

polarities

are

reversed.

Connect

the

speaker

wires

with

the

correct

—

polarity.

SPECIFICA

Minimum

RMS

Output

Power

Per

Channel

20Hz

20kHz

0.003%

THD,

ohms

125W

0.007%

THD,

ohms

150W

Dynamic

Power

Per

Channel

(by

IHF

Dynamic

Headroom

measuring

method)

ohms

175W

ohms

220W

ohms

290W

ohms

390W

ohm

420W

DIN

Standard

Output

Power

Per

Channel

1kHz,

THD,

ohms

215W

Power

Band

Width

0.03%

THD

62.5W,

ohms

10Hz

60kHz

Damping

Factor

1kHz,

ohms

Input

Sensitivity/

Impedance

MAIN

1.14V/60kO

Frequency

Response

(20Hz

20kHz)

+0,

—0.2dB

Total

Harmonic

Distortions

(20Hz

20kHz)

MAIN

Out,

62.5W/80

0.003%

intermodulation

Distortion

Rated

Output/8

ohms

0.003%

Signal

Noise

Ratio

(IHF-A-Network)

MAIN

(shorted)

123dB

MAIN

(5.1kQ

terminated)

119dB

Residual

Noise

(IHF-A-Network)

16uV

Channel

Separation

(Vo1-30dB)

Input

shorted,

terminated,

89dB/70dB

1kHz/10kHz

Power

Supply

Europe

AC220V,

50Hz

U.K.

AC240V,

50Hz

Power

Consumption

650W

435

165

420mm

(17-1/8”

6-1/2”

16-47/64”)

Dimentions

Weight

13kg

Specifications

subject

change

without

notice.

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