Mitsubishi DA-A15DC Manuel utilisateur

a’.

MITSUBISHI

STEREO

POWER

AMPLIFIER

A-AIODCIDA-AISDC

INSTRUCTION

BOOK

Congratulations

your

choice

the

Mitsubishi

Stereo

Power

Amplifier

Model

DA-A10DC/DA-

A15DC.

For

best

performance

results,

please

read

this

instruction

book

carefully

before

use.

WARNING—TO

PREVENT

FIRE

SHOCK

HAZARD,

NOT

EXPOSE

THIS

APPLIANCE

RAIN

MOISTURE.

For

future

reference

space

has

been

provided

below

for

recording

the

serial

number

your

stereo

power

amplifj

ENGLISH

PRECAUTIONS

GENERAL

SURE

USE

YOUR

A.C.

POWER

SOURCE

Your

A.C.

power

marked

the

rear

panel

this

unit.

Connection

any

other

power

source

may

cause

damage

this

unit

and/or

severe

electrical

shock.

NOT

PLUG

UNPLUG

THE

POWER

CORD

WITH

WET

HANDS

There

great

danger

severe

electrical

shock

the

power

cord

plugged

unplugged

with

wet

hands.

not

attempt

unplug

the

cord

from

A.C.

outlet

pulling

the

cord.

Firmly

grasp

the

plug

remove

from

the

A.C.

outlet.

NOT

ALLOW

WATER

ANY

FOREIGN

MATTER

GET

INSIDE

THIS

UNIT

Should

water

metailic

object

accidentally

fall

into

this

unit,

immediately

disconnect

the

power

cord

and

consult

your

authorized

service

dealer.

HANDLE

THE

POWER

CORD

WITH

CARE

not

bend

sharply

twist

the

power

cord.

the

insulation

becomes

damaged,

the

conductor

breaks,

poor

contacts

occur,

request

service

from

your

authorized

service

dealer.

Continued

use

under

these

conditions,

may

cause

fire

electrical

shoek.

NOT

TOUCH

THE

INSIDE

THIS

UNIT

There

are

high

voltages

inside

this

unit.

Never

re-

move

the

top

bottom

cover.

All

inspections

and

repair

including

fuse

replacement,

should

carried

out

your

authorized

service

dealer.

DISCONNECT

THE

POWER

CORD

THE

FIRST

SIGN

TROUBLE

the

first

sign

unusual

noise,

odor,

malfunc-

tion,

disconnect

the

power

cord

and

consult

your

authorized

service

dealer.

Continued

use

under

these

conditions,

may

increase

damage

cause

additional

problems.

LOCATION

AVOID

PLACEMENT

DIRECT

SUNLIGHT,

NEAR

AIR

CONDITIONER

ETC.

This

unit

can

become

unstable

operated

ex-

tremely

high

low

temperatures.

Place

well

ventilated

area

for

proper

heat

dissipation.

Avoid

placement

direct

sunlight,

near

air

corditioners,

poorly

ventilated

areas

excess

humidi-

dust.

not

block

the

ventilation

holes.

CONNECTIONS

SURE

TURN

OFF

THE

POWER

BEFORE

MAKING

CONNECTIONS

This

prevent

damage

the

speakers

from

the

popping

noise

which

occurs

when

plugging

and

unplugging

cords.

USE

EXTREME

CARE

MAKING

THE

COR-

RECT

CONNECTIONS

you

reverse

the

(right)

and

(left)

leads,

you

will

reverse

the

stereo

location

and

channels.

MAKE

CONNECTIONS

SECURELY

any

the

plugs

should

become

loose

discon-

nected,

hum

may

develop.

this

not

corrected,

deterioration

sound

quality

and

possible

damage

the

speakers

may

result.

USE

ONLY

SHIELDED

CORD

FOR

THE

LEADS

Use

only

shielded

cords

for

interconnecting

com-

ponents.

not

use

cords

longer

than

(6'),

Ex-

cessive

lead

lengths

can

deteriorate

high

frequency

response

and

are

subject

interference

that

can

result

hum

noise.

NOT

SHORT

THE

OUTPUT

THE

POWER

AMPLIFIER

This

unit

incorporates

protection

circuit

that

power

transistors

will

protected

case

short.

Shorts

can

reduce

the

life

the

transistors

and

should

avoided.

USE

SPEAKERS

WITH

NOMINAL

IMPEDANCE

4-16

OHMS

you

use

speakers

with

load

impedance

less

than

ohms,

the

protection

circuit

may

triggered

and

the

amplifier

output

muted.

WHEN

CONTROLLING

TWO

PAIRS

SPEAK-

ERS

SELECTION

FROM

THE

COMPANION

PREAMPLIFIER,

ENSURE

THAT

THE

COM.-

BINED

IMPEDANCE

(BOTH

PAIRS

SPEAK-

ERS

OPERATING)

OHMS

ABOVE

the

combined

impedance

below

ohms,

the

load

impedance

detector

circuit

may

operate

and

mute

the

power

amplifier

output.

The

combined

impedance

determined

with

the

following

formula.

COMBINED

IMPEDANCE

peel

(OHMS)

U871B005H04

FRONT

PANEL

TERMINOLOGY

AND

FUNCTIONS

8x8

(ohm

(ohms)

eg.

Nominal

impedance

speaker

Nominal

impedance

speaker

Please

consult

your

audio

dealer

for

additional

information.

OPERATIONS

BEFORE

PLACING

THE

POWER

SWITCH

THE

OFF

POSITION

OPERATING

SWITCHES,

ALWAYS

TURN

THE

PREAMPLI-

FIER’S

VOLUME

(ATTENUATOR)

CONTROL

ALL

THE

WAY

DOWN

This

protect

the

speakers

from

damage,

that

can

occur

the

volume

level

set

high

and

the

power

turned

on.

THERE

WILL

SOUND

FOR

FEW

SEC-

ONDS

AFTER

YOU

TURN

THE

POWER.

THIS

NOT

MALFUNCTON

This

unit

equipped

with

power

supply

muting

circuit

which

prevents

popping

noise

when

the

pow-

switch

turned

off.

CARE

Wipe

the

cabinet

with

soft

cloth

when

becomes

dusty.

should

get

really

dirty,

dampen

soft

cloth

weak

solution

mild

soap

and

water,

wring

out

dry

and

wipe

off.

When

finished,

dry

completely

with

soft

dry

cloth.

Any

volatile

ma-

terials

such

alcohol,

thinner,

benzine,

insecticides,

etc,

may

remove

the

paint

damage

the

luster

and

should

not

used.

U871B005H04

THERMAL

INDICATORS

the

temperature

the

heat

sink

reaches

60°C

(140°F),

the

thermal

indicators

change

color

from

red

black.

the

indicators

turn

black,

turn

the

power

off

and

allow

time

for

the

amplifier

cool.

Resume

operation

when

the

amplifier

cools

nor-

mal

temperature.

HEAT

SINKS

The

heat

given

off

the

transistors

radiated

into

the

air

the

heat

sinks.

TRANSFORMERS

ENGLISH

DUCTS

The

power

cord

and

connecting

cords

pass

through

this

ducts.

HANDLE

MOUNTING

SCREW

HOLES

These

holes

are

provided

for

mounting

the

handles.

For

details,

see

page

ELECTROLYTIC

CAPACITORS

POWER

INDICATOR

This

indicator

illuminates

when

the

POWER

switch

placed

the

position.

POWER

(Power

Switch)

This

switch

for

turning

this

unit

and

off.

When

the

position,

the

power

indicator

illumi-

nated.

REAR

PANEL

TERMINOLOGY

AND

CONNECTIONS

INPUT

LEVEL

(input

Level

Controls)

The

input

level

from

the

preamplifier

can

adjust-

these

screws.

increase

the

input

level,

turn

these

screws

clockwise.

These

screws

are

normally

turned

fully

clockwise.

INPUT

(Power

Amplifier

Inputs)

Connect

the

leads

from

the

preamplifier’s

outputs

these

inputs.

SPEAKERS

(Speaker

Terminals)

Two

pairs

speakers

may

connected

these

terminals.

Turn

the

screws

fully

counterclockwise,

insert

the

speaker

leads

and

tighten

the

screws

firmly.

SPEAKER

SELECTOR

(Speaker

Selection

Switch)

This

switch

controls

speaker

selection.

The

speaker

systems

can

selected

from

the

preamplifier

placing

this

switch

the

OFF

position

and

connect-

ing

the

supplied

SPEAKER

CONTROL

CABLE

the

preamplifier.

For

details,

see

Page

REMOTE

(Remote

Terminal)

The

connection

for

one

end

the

SPEAKER

CONTROL

CABLE.

The

other

end

plugged

into

the

‘‘speaker

control’

terminal

companion

preamplifier

For

details,

see

page

CONNECTING

THE

SPEAKERS

When

connecting

the

speaker

leads

the

SPEAK-

ERS

terminals,

there

danger

electrical

shock

fire

due

potentially

high

output

voltages.

avoid

this

danger,

connect

the

speaker

leads

follows.

Cut

back

the

outer

insulation

the

lead

distance

15mm

(5/8”’).

Twist

each

inner

conductor.

Turn

the

knob

the

SPEAKERS

terminal

fully

counterclockwise.

Insert

the

inner

conductor

into

the

hole

the

SPEAKERS

terminal.

sure

that

the

end

the

insulation

inserted

into

the

hole

distance

3mm

(1/8’’).

Fasten

the

speaker

lead

the

SPEAKERS

terminal

tightening

the

knob

clockwise.

Inner

Conductor

Speaker

terminal

hole

Speaker

leads

Speaker

leads

CAUTION:

When

using

DA-A15DC,

use

than

18AWG,

SPT-2

cord

with

label

for

speaker

leads.

‘

U871B005H04

U871BO05HO4

Speakers

ight

“i

left

(black)

Speakers

thlack)

6———

SPEAKER:

@RO

G©4~16FO@RO

O18

esisliule

olololo

[O;o|O}o

SPEAKER

SELECTOR

off

ome

REMOTE.

UTPUT

SPEAKER

CONTROL

terminals

Preamplifier

when

using

companion

preamplifier,

connect

SPEAKER

CONTROL

terminals

—

HOW

MOUNT

THE

HANDLES

Remove

the

screws

and

washers

that

are

fas-

tened

the

right

and

left

side

this

unit.

Mount

the

supplied

handles

both

side

this

unit

shown

the

diagram.

A.C.

POWER

CORD

This

cord

plugged

into

the

A.C.

outlet.

ENGLISH

OPERATIONS

BEFORE

OPERATING

Check

the

following

items

before

placing

the

POW-

switch

the

position.

All

other

components

are

properly

connected.

«The

position

the

SPEAKER

SELECTOR

switch

should

correspond

the

terminals

which

the

speakers

are

connected.

The

INPUT

LEVEL

control

screws

should

turned

fully

clockwise.

Then

place

the

POWER

switch

the

position

OPERATION

Select

the

tuner,

turntable

other

source

pro-

gram

material

and

advance

the

‘Volume

(Atten-

uator)"’

control

the

preamplifier.

You

should

now

receiving

the

program

from

the

speakers.

2.SPEAKER

SELECTION

FROM

THE

COMPANION

PREAMPLIFIER

you

are

using

the

companion

preamplifier,

speak-

selection

can

controlled

from

the

preamplifier.

Place

the

SPEAKER

SELECTOR

switch

the

OFF

position.

Connect

the

SPEAKER

CONTROL

CABLE

shown

the

diagram

(see

page

5).

Speaker

selection

may

now

controlled

from

the

preamplifier.

U871BO05HO4

BEFORE

TAKING

YOUR

POWER

AMPLIFIER

FOR

SERVICING

.,...

First

check

ensure

that

all

other

components

are

properly

connected

this

unit

and

are

operating

normally.

Then

check

the

following

items.

SYMPTOM

CAUSE

REMEDY

©Power

does

not

come

when

the

POWER

switch

turned

on.

Power

cord

not

completely

plugged

in.

Fuse

has

blown,

Plug

completely.

©Consult

your

authorized

service

dealer.

©No

sound

Improper

SPEAKER

SELECTOR

switch

positioning.

Correct

the

switch

position.

oNominal

speaker

impedance

less

than

ohms

and

Use

speakers

with

nominal

impedance

ohms

protection

circuit

operating.

above.

Speaker

leads

plugs

not

completely

plugged

in.

Plug

completely.

Speaker

(+)

and

(—)

leads

are

touching.

Separate

the

leads.

Noise

Turntable

output

cord

too

power

cord.

©Plugs

not

completely

plugged

in.

©Put

the

turntable

output

cord

far

possible

from

the

power

cord.

Plug

completely.

oouauFSFSFSFSFFSSFFFFeEeEeeee

Howling

Caused

feedback.

This

occurs

because

speaker

vibrations

are

being

transmitted

the

turntable.

Place

the

speakers

and

the

turntable

far

apart

possible.

It is

also

helpful

put

insulator

under

the

turntable.

Poor

sound

quality

Too

much

power

applied

speakers.

©No

stereo

effect

and

poor

bass

Speaker

leads

plugs

(+)

and

(—)

are

reversed.

Adjust

‘‘Volume

(Attenauator)‘’

your

preamplifier.

©Correct

the

speaker

leads

plugs

connection.

©No

sound

for

—

seconds

after

power

switched

on.

©Muting

circuit

operating

eliminate

the

popping

noise

when

power

turned

on,

This

not

malfunction.

U871B005H

ENGLISH

DA-AlODC

DA-A15DC

SPECIFICATIONS

Power

output

Total

harmonic

distortion

intermodulation

distortion

(70Hz

and

7kHz

Power

bandwidth

(IHF)

Frequency

response

Input

sensitivity/impedance

Damping

factor

Channel

separation

Hum

and

noise

Signal

noise

ratio

(at

rated

power)

Slew

rate

Power

consumption

Dimensions

(Wx

Weight

DA-A10DC

100W

continuous

power

per

channel,

both

channels

driven

into

ohms

from

15Hz

30kHz,

with

0.01%

THD

0.005%

S50W

per

channel,

both

channels

driven

into

ohms

from

20Hz

20kHz

0.008%

rated

power,

ohms

0.01%

per

channel,

ohms

10Hz

100kHz

0.1%

THD,

ohms

+0.1dB

from

20Hz

20kHz

rated

power,

ohms

+¢dB

from

150kHz

0.5W

per

channel,

ohms

(variable)

/50k

ohms

100

from

20Hz

20kHz,

ohms

100dB

1kHz

80dB

20kHz

0.12mV

(unweighted,

closed

circuit)

107dB

(unweighted,

closed

circuit)

122dB

(IHF,

network,

closed

circuit)

118dB

(DIN,

closed

circuit)

109dB

(DIN,

47k

ohms//250pF

terminated)

30V

/us

50V

peak

peak,

ohms

6OOW

(IEC

nominal)

390W

rated

power,

ohms

240W

(UL

nominal)

425

170

285mm

(16-3/4

6-3/4

11-1/4”)

16kg

(35-1/4

Ib)

DA-A15DC

150W

continuous

power

per

channel,

both

channels

driven

into

ohms

from

15Hz

30kHz,

with

0.01%

THD

0.005%

75W

per

channel,

both

channels

driven

into

ohms

from

20Hz

20kHz

0.008%

rated

power,

ohms

0.01%

per

channel,

ohms

10Hz

100kHz

0.1%

THD,

ohms

0.1dB

from

20Hz

20kHz

rated

power,

ohms

+°dB

from

150kHz

0.5W

per

channel,

ohms

(variable}/50k

ohms

100

from

20Hz

20kHz,

ohms

100dB

1kHz

80dB

20kHz

0.15mV

(unweighted,

closed

circuit)

107dB

(unweighted,

closed

circuit)

123dB

(IHF,

network,

closed

circuit)

119dB

(DIN,

closed

circuit)

109dB

(DIN,

47k

ohms//250pF

terminated)

30V/us

50V

peak

peak,

ohms

9OOW

(IEC

nominal)

550W

rated

power,

ohms

320W

(UL

nominal)

425

170

285mm

(16-3/4

6-3/4

11-1/4")

17.7kg

(39

Ib)

Supplied.with:

plug

cord

speaker

control

cable

Design

and

specifications

are

subject

change

without

notice

for

improvements.

0877

BOOSHO4

Ce manuel convient aux modèles suivants

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