Sony MX-P21 Manuel utilisateur

SPECIFICATIONS

Power

requirements

AC

US

and

Canadian

models:

120

V

ac,

60

Hz

UK,

AEP

models:

110—120

V

or

220—240

V

ac

(adjustable

by

Sony

personnel),

50/60

Hz

DC

12V

car

battery

by

using

the

optional

DCC-16A,

DCC-16AE,

DCC-16AW

car

battery

cord

Power

consumption

AC

28W

DC

12V,

1.8A

Operating

temperature

0°C

to

50°C

(32°F

to

122°F)

Storage

temperature

-20°C

to

+60°C

(-4°F

to

+140°F)

Dimensions

Approx.

482

x

130

x

448mm

(w/h/d)

(19x

54,

x

177/,

inches)

excl.

projecting

parts

Weight

Approx.

12.6kg

(27!bs

1302)

Supplied

accessories

AC

power

cord

(1)

AC

plug

adaptor

(1)

(except

US,

Canadian

and

UK

models.)

—

Continued

on

page

2

—

MICROFILM

US

Model

Canadian

Model

AEP

Model

UK

Model

Revised

-2

AUDIO

MIXER

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

SHADING

AND

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUBLISHED

BY

SONY.

ATTENTION

AU

COMPOSANT

AYANT

RAPFOR

T

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

UNE

MARQUE

A

SUR

LES

DIAGRAMMES

SCHE-

MATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REM-

PLACER

CES

COMPOSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONWES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBEIES

PAR

SONY.

SERVICE

MANUAL

MX-P21

|

(O0dBs

=0.775V)

Inputs

Reference

input

Maximum

input

,

Balanced

or

Cc

onnector

Channels

level

‘eval

Input

impedance

unbalanced

MIC

INPUT

less

than

(CANNON

XLR-3-31

type)

8

—60dBs

OdBs

600

ohms

balanced

LINE

INPUT

10dB

5

i

bal

d

(phono

jack)

8

-10dBs

15dBs

50

kilohms

|

unbalance

PHONO

INPUT

'

(phono

jack)

6

-—44dBs

(1

kHz)

—14dBs

(1

kHz)

50

kilohms

unbalanced

SUB

INPUT

!

(phono

jack)

2

-10dBs

15dBs

10

kilonms

unbalanced

i

EXT

MON

INPUT

;

(phono

jack)

2

(stereo

x

1)

-—10dBs

15dBs

10

kilohms

unbalanced

Outputs

Reknacisi

Ch

|

Reference

output

Maximum

output

Suitable

load

Balanced

or

-

ater

level

impedance

unbalanced

LINE

OUT

(CANNON

XLR-3-32

type)

2

(stereo

x

1)

4dBs

24dBs

600

ohms

balanced

;

more

than

LINE

(phono

jack)

2

(stereo

x

1)

5dBs

15dBs

40:kilohms

unbalanced

;

more

than

AUX

(phono

jack)

2

(monaural)

15dBs

40:

Kilchmns

unbalanced

:

more

than

MONITOR

(phono

jack)

2

(stereo

x

1)

15dBs

10

kilohms

unbalanced

PHONES

(phono

jack)

2

(stereo

x

1)

50

mW

(8

ohms)

more

than

80hms

unbalanced

‘

more

than

TB

(phono

jack)

1

(monaural)

5dBs

15dBs

40

kilenis

unbalanced

Frequency

response

20-20,000Hz

(1?2dB

at

1kHz)

Harmonic

distortion

(20-

20,000

Hz)

Less

than

0.3%

under

maximum

input/output

level

Equivalent

input

noise

Microphone

inputs

(input

150ohms

terminated,

20-

20,000

Hz)

Less

than

-126dBs

Line

inputs

(input

short-circuited,

20-

20,000

Hz)

Less

than

-80dBs

Inherent

noise

Master

fader

at

0

Less

than

-85dBs

Channel

fader

at

0

Less

than

—-70dBs

Cross-talk

(at

1kHz)

More

than

60dB

Built-in

oscillator

1

kHz

sine-wave

Equalization

characteristics

(See

“OPERATING

CURVES”

on

page

3.)

Low-cut

filter

Cut-off

frequency

120Hz

-3dB

Attenuation

12

dBioctave

(See

“OPERATING

CURVES"

on

page

3.)

|

MX-P21

|

SECTION

1

OUTLINE

OPERATING

CURVES

FEATURES

1-1.

LOCATION

OF

PARTS

AND

CONTROLS

Note:

Negative

numbers

coincide

with

those

on

pages

5

through

7.

Equalization

characteristics

POWER

AND

INPUT

SECTIONS

OUTPUT

SECTION

The

Sony

MX-P21

has

been

designed

to

be

multi-purpose

audio

mix-

er

capable

of

performing

all

the

essential

functions

required

fora

public

address

system,

radio

and

TV

broadcasting,

studio

record-

ing

and

tape

editing.

8

channel

inputs

with

various

adjustment

possibilities

Each

input

can

be

independently

adjusted

to

suit

the

connected

equipment

and

to

provide

excellent

mixing

results

from

its

own

low-

cut

filter

and

equalization

circuits.

With

the

PAN POT

(panoramic

potentiometer)

function,

each

input

sound

image

can

be

positioned

to

the

desired

spot

between

the

L

and

R

stereo

output

channels.

MID

(min.)

|

Auxiliary

inputs

and

outputs

for

additional

mixing

effects

By

connecting

an

echo

machine

or

a

reverberation

unit,

additional-

ly

desired

sound

effects

may

be

easily

obtained.

One

of

the

outputs

can

be

used

to

supply

signals

to

a

fold-back

speaker

for

players

on

the

stage.

Response

(dB)

100

1k

10k

20k

Frequency

(Hz)

Monitoring

of

various

signals

Each

line

and

auxiliary

output

signal

can

be

monitored

either

with

headphones

or

speakers

for

accurate

mixing.

in

addition,

the

PFL

(pre-fader

listening)

function

permits

direct

monitoring

of

each

of

Low-cut

filter

characteristics

na

7:

f

jf

es

e

J

e

°

fe

°

the

original

incoming

signals.

ee

ive

:

Oo

O

ierre.

Talk-back

function

indispensable

for

studio

use

&

-

=

bg

:

3 3

1

ee

2

=

The

built-in

microphone

enables

the

operator

to

directly

communi-

@|e

@

@)

3:3

g

8

©)

|

O

O10

7

cate

with

those

in

the

studio.

e°e

@@

::

23

O

|

O

Q/90

a

;

Sie

lee

ele

I

IPIP

|e

Ie

\2

re

a

rack

mounting

ae

e\e

e|@

Om

®

|

re) eo)

O;0

2

e

table-top

design

can

be

easily

converted

for

rack-mounting

in

a

ele

ee

poo

O O

O10

g

19-inch

standard

rack

or

in

specified

racks

designed

for

Sony

e

ie

e

(|@

00

(om)

fa)

Q

Qo

1oO

®

U-matic

video

systems.

e@

@

ee

QO

=

O

O10

o

mio

o}o

oO

=)

o;n

2-way

powering

for

the

unit

plus

microphones

The

built-in

DC-DC

converter

enables

stable

operation

from

either

a

r

|

12V

car

battery

or

an

ac

power

supply,

or

both.

Furthermore,

the

unit

can

supply

48

V

dc

to

each

of

the

connected

phantom

powered

condenser

microphones.

|

1]

100

tk

10k

|

Frequency

(Hz)

Supplementary

functions

for

full

creative

flexibility

—

Built-in

oscillator

to

supply

test

and

balancing

signals.

@

poweercrecereseserecererececesererosecscscereceserereres

—.Through

function

which

allows

input

signals

to

bypass

the

MODEL

IDENTI

FICATION

mixing

circuits

for

direct

output.

MONITOR

SECTION

~—Cascade

connectors

to

multiply

input

channels.

—

Specification

Labels

—

SONY.

MODEL

NO.

MX-P21

AUDIO

MIXER

WLLL

LLL

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D900

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=

DC:12V

1.8A

SERIAL

NO.

MADE

IN

JAPAN

US,

Canadian

model:

AC:

120

V

60

Hz

28

W

AEP,

UK

model:

AC:

220

—

240

V ~50/60

Hz

28

W

=3=

—4—

PRECAUTIONS

On

safety

@

Check

that

the

operating

voltage

of

your

unit

is

identical

to

the

voltage

of

your

local

power

supply.

For

car

battery

operation,

use

the

car

battery

cord

recommended

for

this

set.

®

Should

any

liquid

or

solid

object

fall

into

the

cabinet,

unplug

the

unit

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,

ex-

cessive

dust,

mechanical

vibration

or

shock.

On

operation

When

the

unit

is

not

used,

turn

the

power

off

to

conserve

energy

and

to

extend

the

useful

life

of

your

unit.

On

cleaning

the

cabinet

Clean

the

cabinet,

panel

and

controls

with

a

soft

cloth

lightly

mois-

tened

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.

They

make

an

ideal

container

to

transport

the

unit

in.

When

shipping

the

unit

for

repair

work

or

to

another

location,

repack

it

as

it

was

originally

packed

at

the

factory.

If

you

have

any

questions

about

this

unit,

contact

your

Sony

dealer.

OPERATING

VOLTAGE

Before

connecting

the

unit

to

an

ac

power

source,

refer

to

the

serial

plate

and

check

that

the

operating

voltage

of

your

unit

is

the

same

as

the

local

power

line

voltage.

The

USA

and

Canadian

models

operate

on

120V

ac.

The

models

for

other

countries

operate

on

either

110-120V

or

220-240

V

ac.

The

voltage

adaptation

must

be

performed

by

au-

thorized

Sony

personnel.

NOTICE

FORTHE

CUSTOMERS

IN

THE

UNITED

KINGDOM

IMPORTANT

The

wires

in

the

mains

lead

are

coloured

in

accordance

with

the

following

code:

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

ter-

minals

in

your

plug

proceed

as

follows:

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

ter-

minal

which

is

marked

with

the

letter

L

or

coloured

red.

MX-P21

|

FUNCTION

OF

PARTS

AND

CONTROLS

POWER

AND

INPUT

SECTIONS

@

MIC

INPUT

1-8

(microphone

input)

connectors

(CANNON

XLR-3-31

type)

;

For

microphones.

arrangement

1:

GND

2:

hot

3:

cold

©

+48V

(microphone

power

supply)

switches

Set

to

ON

to

supply

48V

dc,

7mA

(max)

to

phantom

powered

condenser

microphones

connected

to

the

corresponding

MIC

INPUT

connectors.

©

LINE/PHONO

INPUT

1-6

jacks

(phono

jacks)

Accept

line-out

signals

from

tape

decks

and

amplifiers,

or

phonoout

signals

from

record

players

equipped

with

moving-

magnet

type

cartridges.

@

LINE

INPUT

7/8

jacks

(phono

jacks)

Accept

line-out

signals

from

a

tape

deck

or

an

amplifier.

©

Ground

terminal

When

connected

audio

equippment

such

as

a

record

player

re-

quires

earth

connection

to

reduce

hum

or

other

undesirable

noise,

connect

its

ground

wire

to

this

terminal.

©

SUB

INPUT

jacks

(phono

jacks)

Accept

auxiliary

input

signais

such

as

those

from

an

echo

machine.

|

@

FADER

REMOTE

3/4

jacks

(phono

jacks)

By

sliding

up

the

channel

faders

of

channel

3

and

4

from

the

minimum

(0)

position,

these

jacks

will

be

short-circuited

to

switch

on

audio

equipment

connected

via

an

appropriate

inter-

face

unit.

The

permitted

current

to

be

supplied

to

these

jacks

is

max.2mA.

©

DC

IN

+12V

(DC

power

supply)

jack

To

power

this

unit

from

a

12V

car

battery.

For

connection,

use

the

optional

DCC-16A,

DCC-16AE

or

DCC-16AW

car

battery

cord.

to

a

cigarette

lighter

socket

of

a

car

ex.

DCC-16A

Note:

Use

only

the

recommended

car

battery

cord

manufactured

by

Sony.

Polarity

of

the

plugs

of

other

manufacturers

may

be

dif-

ferent.

A

Polarity

of

the

plug

of

the

Sony

car

battery

cord

©

AC

IN

(AC

power

supply)

socket

@®

Channel

faders

Connect

with

the

supplied

ac

power

cord

to

an

ac

power

source.

Adjust

the

signal

level

of

each

channel

going

to

the

line

outputs

The

USA

and

Canadian

models

are

equipped

with

a

3-pin

socket

for

proper

balance.

The

position

7

(the

thick

line)

indicates

the

and

the

modeis

for

other

countries

are

equipped

with

a

2-pin

reference

level.

socket.

For

the

customers

of

the

model

supplied

with

the

ac

plug

adap-

@

SUB

IN

1/2

LEVEL

controls

tor:

Adjust

the

signal

levels

from

SUB

INPUT

1

or

2

jack

@

respec-

If

the

plug

of

the

ac

power

cord

does

not

match

with

the

outlet,

tively.

use

the

ac

plug

adaptor.

@

SUB

IN

1/2

PAN

knobs

Position

the

sound

image

of

SUB

INPUT

1

or

2

in

the

desired

place

between

the

output

L

and

R

channels.

@®

POWER

switch

and

pilot

lamps

Depress

the

switch

to

turn

on

the

unit.

When

ac

power

is

supplied,

the

AC

pilot

lamp

will

light.

When

dc

power

is

supplied,

the

DC

lamp

will

light.

@

If

both

ac

and

dc

power

supplies

are

connected,

the

both

the

AC

and

DC

tamps

will

light.

OUTPUT

SECTION

@

LINE

OUT

LIR

(line

output)

connectors

(CANNON

XLR-3-32

type)

®

PEAK

indicators

Feed

out

the

mixed

line

output

signals

(balanced).

Light

up

if

the

corresponding

input

signals

level

is

within

5dB

of

the

clipping

level.

arrangement

1:

GND

2:

hot

3:

cold

@

INPUT

SELECT

switches

To

remove

Select

the

input

sources.

The

switches

of

channels

1

to

6

have

press

here.

three

positions;

LINE,

MIC,

PHONO

and

the

switches

of

chan-

WV

oO

nets

7

and

8

have

two;

LINE,

MIC.

iS

®

MIC

(microphone

gain)

controls

Reduce

excessive

microphone

input

level

and

prevent

distortion.

Adjust

these

controls

so

that

the

proper

level

can

be

obtained

when

each

corresponding

fader

is

set

at

7".

@

LINE

LIR

(line

output)

jacks

(phono

jacks)

Turn

the

controls

counterclockwise

when

the

corresponding

Feed

out

the

same

signals

(unbalanced,

however)

as

the

PEAK

indicators

light

up.

CANNON

type

connectors

@.

@

LCF

(low-cut

filter)

switches

@

AUX

1/2

(auxiliary

output)

jacks

(phono

jacks)

When

the

switches

are

depressed,

input

signals

below

120Hz

—

Each

supplies

monaural

output

signals

independently

of

the

line

are

attenuated

at

a

12dB/octave

rate.

outputs

@@.

Connect

to

an

echo

machine

or

a

power

amplifier

to

drive

a

foid-back

speaker.

®

EQ

(equalization)

switches

and

controls

When

the

EQ

switches

are

depressed,

the

input

signals

pass

@

TB

(

talk-back

output)

jack

(phono

jack)

through

the

equalizer

circuits.

Adjust

the

controls

to

equalize

While

the

TB

OUT

button

of

the

TALK

BACK

buttons

@

is

de-

the

sound

sources.

The

Hi

controls

are

for

the

high-frequency

—

pressed,

the

signal

from

the

built-in

microphone

is

fed

to

this

range

around

10kHz,

the

MID

controls

are

for

the

middle-

jack.

‘frequency

range

around

2.8kHz

and

the

LOW

controls

are

for

the

low-frequency

range

around

100

Hz.

@

CASCADE

IN/OUT

connectors

(8-pin

DIN

connectors)

For

connecting

two

or

more

MX-P21

units

in

parallel

to

increase

®

AUX

1/2

(auxiliary

output

level)

controls

the

number

of

inputs.

Ajust

the

signals

level

of

each

channel

going

to

the

auxiliary

out-

puts

1

or

2

respectively.

arrangement

1:

AUX-1

5:

PFL

control

S72

2:

GND

6:

LINEL

®

PRE

(pre-fader)

switches

(Soe)

3:

AUX-2

7:

LINER

When

the

switches

are

depressed,

the

pre-fader

signals

of

the

y969

4:

PFL

audio

8:

GND

corresponding channels

can

be

fed

to

the

auxiliary

output

1.

.

These

are

especially

useful

when

the

auxiliary

output

1

is

used

Connection

8

inputs

8

inputs

for

a

fold-back

speaker.

@®

PAN

POT

knobs

These

permit

panning

of

the

incoming

signals

between

the

out-

put

Land

R

channels.

The

center

click

positions

place

the

sound

images

in

the

center.

CASCADE

OUT

IN

8-pin

shielded

cable

(max.

1m

long)

Cc

ist

mixer

2nd

mixer

The

image

v(;

»y

The

image

moves

to

moves

to

the

left.

e

©

ight.

C

R

the

right

LINE

OUT

@

MASTER

L/R

VU

meters

Indicate

the

L'and

R

channel

line

output

levels

respectively.

(When

the

EXT

MON

switch

@

is

depressed,

external

signal

levels

will

be

indicated.)

@

AUX

1/2

VU

meters

Indicate

the

auxiliary

output

levels.

@

7-8

THROUGH

switch

When

this

switch

is

depressed,

the

line

input

signals

from

chan-

nel

7

and

8

can

be

directly

output

from

the

LINE

jacks

@

without

passing

through

the

mixing

circuits,

even

if

the

power

of

the

mixer

is

turned

off.

Use

this

switch

for

copying

tapes.

@

OSC

(oscillator)

switch

When

this

switch

is

depressed,

a

1kHz

sine-wave

is

fed

to

the

line

outputs

@@.

The

level

can

be

adjusted

with

the

MASTER

fader

@.

®

MIC

(built-in

microphone)

To

send

information

from

the

mixer.

The

outputs

to

send

can

be

selected

with

the

TALK

BACK

buttons

@.

@

TALK

BACK

buttons

Select

the

outputs

for

the

built-in

microphone.

MASTER:

line

outputs

@®

AUX-1

|

AUX-2

|

TB

OUT:

TB

output

jack

®

corresponding

auxiliary

outputs

@

TB

LEVEL

(talk-back

level)

control

Adjusts

the

built-in

microphone

sound

level.

@

MASTER

fader

Adjusts

the

overall

signal

level

output

from

the

LINE

OUT

con-

nectors

@

and

LINE

jacks

®.

The

reference

level

is

indicated

by

a

thick

line.

@

AUX

OUT

1/2

(auxiliary

output)

faders

Adjust

the

output

levels

of

the

AUX

1

and

AUX

2

jacks

@

respec-

tively.

;

_MX-P2T

MONITOR

SECTION

©

PFL

(pre-fader

listening)

switches

While

the

switch

is

depressed,

the

pre-fader

signal

from

the

corresponding

channel

can

be

monitored

through

headphones

without

affecting

the

main

signal

flow.

When

the

signal

is

to

be

monitored

with

the

speakers

connected

to

the

MONITOR

jacks

@,

keep

the

speaker

PFL

switch

@

in

the

depressed

position.

@

EXT

MON

(external

monitor)

switch

Depress

to

monitor

the

signals

from

the

EXT

MON

INPUT

jacks

®.

When

the

switch

is

depressed,

the

MASTER

VU

meters

@

indi-

cate

the

external

signal

level.

@®

PFL

(speaker

pre-fader

listening)

switch

When

the

switch

is

depressed,

the

original

input

signal

corre-

sponding

the

depressed

PFL

button

@

will

be

output

from

the

MONITOR

jacks

@.

@

PHONES

(headphones)

jack

(stereo

phone

jack)

Accepts

headphones

having

an

impedance

of

8ohmsor

more.

@

PHONES

LEVEL

(headphones

level)

control

Adjusts

the

level

of

the

headphones

connected

to

the

PHONES

jacks

@®@.

@

MONITOR

LEVEL

control

Adjusts

the

output

level

to

the

MONITOR

jacks

@.

@

MONITOR

SELECT

switch

Selects

the

output

signal

to

be

monitored.

MASTER:

line

outputs

@@®

AUX-1

AUX-2

The

setting

of

this

selector

will

have

no

effect

when

any

of

the

PFL

switches

@

or

the

EXT

MON

switch

@

is

depressed.

}

corresponding

auxiliary

outputs

@

MON

MUTE

(monitor

mute)

jack

(phono

jack)

To

externally

mute

by

20dB

the

monitor

outputs

from

the

MONITOR

jacks

@

by

short-circuiting

this

jack.

@

MONITOR

LIR

output

jacks

(phono

jacks)

To

connect

a

power

amplifier

to

drive

the

monitor

speakers.

@

PHONES

LI/R

(external

headphones)

jacks

(phono

jacts)

Feed

out

the

same

signals

as

those

from

the

PHONES

jac

k

@

on

the

operating

panel.

@®

EXT

MON

INPUT

L/R

(external

monitor

input)

jacks

(phono

jacks)

To

monitor

external

signals,

for

example;

the

montoring

of

signals

which

have

already

been

broadcast

or

recordei

from

the

mixer.

MX-P21

1-2,

RACK

MOUNTING

By

removing

the

front

and

side

panels,

the

MX-P21

can

be

mounted

onto

a

19-inch

standard

rack

or

one

of

the

various

racks

designed

for

the

Sony

U-matic

video

systems.

How

to

remove

Use

a

Phillips

screwdriver.

~

Coa)

4

Remove

the

panels

from

the

rack-mount

brackets.

fe

on

Bp

oe

3

Temporarily

remove

the

rack-mount

brackets

from

both

sides.

2

Pull

out

the

panel

by

1

Remove

the

two

screws

on

each

side

panel.

sliding

it

forwards.

5

Re-attach

the

rack-mount

brackets

to

the

sides.

Mounting

example

Mounting

dimensions

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MX-P21

SECTION

2

DISASSEMBLY

7

SIDE

FRAI

Note:

Follow

the

di

bl

d

in

th

i

ote

ollow

the

disassembly

procedure

in

the

numerical

order

given.

ORNAMENTAL

PANEL

CONNECTOR

PANEL

2

Remove

4

(four)

+RK3

x

8

screws

and

4

(four)

ornamental

washers

(3

mm

dia.).

3)

Remove

2

(two)

+P3

x

8

screws

and

DDC

bracket.

@

Remove

4

(four)

+B3

x

6

screws

sai

4

(four)

lockwashers

(3

mm

dia.).

ORNAMENTAL

@

Remove

2

(two)

+B3

x

30

screws

and

SIDE

PLATES

2

(two)

panel

retainer

rings.

WITH

TABLE

\

@

Byu

.

2

.

feigh

and

i

@

Remove

2

(two)

+B3

x

6

screws,

2

(twa)

lock

washers

Qa

Remove

(two)

+B3

x

30

screws

and

2

(two}

(3

mm

dia.)

and

2

(two)

rubber

feet.

panel

retainer

rings.

*

@

Connector

panel

can

be

withdrawn

a

few

centimeters.

t

@

Pull

off

11

(eleven)

slide-contro!

knobs.

(3)

Lift

ornamental

panel

upwards.

©

Remove

22

(twentytwo)

+P3

x

4

screws

and

case

lid.

MOUNT

FRAME,

SIDE

COVER

AND

POWER

TRANSFORMER

@

Remove

3

(three)

+P3

x

4

screws.

Remove

2

(two)

+PSW3

x

6

screws,

4

@

Remove

4

(four)

+K3

x

10

screws.

(Both

sides

when

required.

).

@

The

fol.

covers

r

rc

DC-DC

CONVERTER

AND

DC-DC

CONVERTER

@

Remove

2

(two)

+B3

x

6

screws

and

CIRCUIT

BOARD

2

(two)

lockwashers

(3

mm

dia.).

@

Remove

2

(two)

+B2

x

6

screws

and

side

cover

(right).

mount

frame

and

mount-frame

cover

@

Remove

4

(four)

+P3

x

12

screws

and

4

(four)

transistor

brackets,

(8)

Circuit

board

checking

can

be

made

in

the

following

condition

with

power

applied

and

without

transistor

brackets

for

a

short

period

of

time.

@Q

Remove

4

(four)

+B3

x

6

screws,

@

Remove

7

(seven)

+B3

x

6

screws.

@

+P4x

10

(four)

fastening

power

transformer.

@

Hold

nuts

through

this

slot

and

remove

a

+P4

x

10

screw

at

position

A.

Other

3

(three)

nuts

can

be

held

from

the

bottom.

Remove

2

(two)

+B2.6

x

8

screws,

LED

block

(LED

circuit

board)

and

2

(two)

collars.

Collars

are

located

between

LED

block

and

chassis.

@O

Fe

PG

sich

1

@

Remove

2

(two)

+PSW3

x

6

screws.

astening

BA

P4x

10

scan

ttom.

326x8

(LED

2

(two)

located

k

and

CONNECTOR

PANEL

C1)

Remove

4

(four)

+B3

x

6

screws

and

4

(four)

lock

washers

{3

mm

dia.).

@

Remove

2

(two)

+B3

x

6

screws,

2

(two)

lockwashers

(3

mm

dia.)

and

2

(two)

rubber

feet.

©

Connector

panel

can

be

withdrawn

a

few

centimeters.

t

CIRCUIT

BOARD

@

Remove

2

(two)

+PSW3

x

6

screws,

[

=n

RR

ARANEDSED

ANIA

ROA

CONVERTER.

DC-DC

CONVERTER

AND

DC-DC

CONVERTER

MX-P21

©

Remove

2

(two)

+P3

x

8

screws

and

DDC

bracket.

(4)

Remove

22

(twentytwo)

+P3

x

4

screws

and

case

lid.

©

Remove

3

(three)

+P3

x

4

screws.

@

Remove

2

(two)

+PSWS3

x

6

screws,

@

Remove

4

(four)

+P3

x

12

screws

and

4

(four)

transistor

brackets.

(8)

Circuit

board

checking

can

be

made

in

the

following

condition

with

power

applied

and

without

transistor

brackets

for

a

short

period

of

time,

SIDE

FRAMES,

REAR

COVER

AND

FRONT

COVER

C1)

By

using

a

long

phillips-head

screwdriver,

remove

&

(eight)

+PSW3

x

6

screws.

Side

frames,

rear

cover

and

front

cover

can

be

removed

together

upwards.

The

following

showns

unit

with

side

frames

and

covers

removed.

@

Remove

5

(five)

+PSW3

x

6

screws,

PGA

board

can

be

fanned

out

upwards

using

harness

side

as

pivot,

[

HaA-1,

HA-2

AND

SUB

IN

BOARDS

e"

a

Br

de

le

Tedd

ed

b

et:

FEF

TE

PERE

=

e

s

8

.

a

ba

y

9

«

a

e

Y

t

a

ind

ae

|

iy

PRG

jointly

PRT

SE

tem,

|

sunning

ERATE,

@

Unplug

3

(three)

connectors,

©

Pull

off

contro!/switch

knobs

and

buttons,

and,

remove

all

control/switch

nuts.

HA-1

HA-2

SUB

IN

4

)

Following

shows

unit

with

HA-1

board

for

channel-1

removed.

Sony MX-P21 Manuel utilisateur

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