Marantz CD-73 Manuel utilisateur

wwa.

CD-73

PYNs

ERR

BPacn

ERE

ZZ’

model

CD-73

TABLE

CONTENTS

SECTION

PAGE

TRODUGTIONS

Sosiuteucie

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hank

hws

Hered

eeu

vas

aca

Sanh

Galatea

laatee

Seeded

ees

Pee

BORROS

tie

Serene

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Vein’

ear

mehate

ula

len

euhae

DRAWER

MOTOR

CONTROL

P.W.

BORAD

WORKING

PRINCIPLE

...................

ADJUSTMENT

PROCEDURES

FOR

DISC

CLAMPER

................

0.0.00

ccs

eeeuuee

VOLTAGE

CONVERSION:

sensi

eetaceans

aine

pen

Matas

SIGNAL,

BLOCK:

DIAGRAM

202

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cel

Sie

tales

dea

tka ban

aee

aren

iene

COMPONENT

LOCATIONS

(AND

WIRE

CONNECTIONS)

...................0.00.-0000

DIAGRAM

AND

COMPONENT

LOCATIONS

..............

0.0.0:

cece

eee

ees

8.1

Servo

(P200)

Schematic

Diagram

and

Component

Locations

............

20000

eee

eens

8.2

Decoder

(P500)

Schematic

Diagram

and

Component

Locations

....

2.0.0.0.

eee

eens

8.3

Power

Supply

(P100)

Schematic

Diagram

and

Component

Locations

..........-

0-0.

eee

ees

8.4 Pre

Amp.

Laser

(AY40)

Schematic

Diagram

and

Component

Locations

......-.

0.0000

cece

eeee

eae

9\-

EXPLODED

‘VIEW

AND:

PARTS

LIST

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ELECTRICAL<PARYTS

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3585

MODEL

CD-73

COMPACT

DISC

PLAYER

INTRODUCTION

This

service

manual

was

prepared

for

use

Authorized

Warranty

Stations

and

contains

service

information

for

Marantz

Model

CD-73

Compact

Disc

Player.

Servicing

information

and

voltage

data

included

this

manual

are

intended

for

use

the

knowledgeable

and

ex-

perienced

technician

only.

All

instructions

should

read

carefully.

attempt

should

made

proceed

without

good

understanding

the

operation

the

Compact

Disc

Player.

The

parts

list

furnishes

information

which

replacement

parts

may

ordered

from

the

Marantz

Company.

simple

description

included

for

parts

which

can

usually

ob-

tained

through

local

suppliers.

3586

P.W.

BOARDS

Power

Supply

Servo

Disc

Inside

Indicator

Program

Key

Switch

Mode

Key

Switch

...

Signal

Relay

Display

...........

Mode

Indicator

Signal

Relay

WON

AKHAWNS

—

Pre

Amp.

Laser

...

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

«mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

mounted

P.W.

-mounted

P.W.

Board

P100

Board

P200

Board

P500

Board

P800

Board

PHOO

Board

PROO

Board

PR50

Board

PSOO

Board

PUOO

Board

PU50

Board

PYOO

Board

PZ00

Board

PZ50

Board

AY40

DRAWER

MOTOR

CONTROL

P.W.

BORAD

WORKING

PRINCIPLE

Drawer

motor

control

Borad

includes

the

following.

(1)

Drawer

motor

drive

circuit

(2)

Remote

control

circuit

(Marantz

Bus

System

decoder

circuit)

3.1

Drawer

Motor

Drive

Circuit

Outline

the

system

This

circuit

revolves

and

reverses

the

drawer

motor

the

OPEN/CLOSE

switch

S802

the

front

panel

open

and

the

drawer.

includes

circuit

increase

starting

torque

and

safety

circuit

which

stops

automatically

when

something

caught

the

drawer.

Operation

each

part

Q809,

Q808

and

Q807

are

motor

drive

circuits.

Especially

Q808

increases

motor

starting

torque.

When

the

voltage

R820

becomes

over

about

0.6V,

the

base

current

begins

flow

through

Q803.

That

is,

the

motor

locked

detect

the

excessive

current.

Q805

and

Q806

make

set/reset

flip

flop,

which

set

whell

positive

voltage

put

into

the

base

Q805.

And

it is

reset

when

the

base

becomes

long

it is

set,

D806

‘ON’

and

motor

drive

circuit

does

not

operate.

Q802

becomes

“ON’’

just

for--a

few

msec

when

the

OPEN/CLOSE

switch

S802

pushed.

(S802

non-shorting

type.)

OPENSCLOSE

Q801

becomes

“ON’’

just

for

the

time-constant

based

R816/R801/C801only

afterS802

changed

from

OPEN,

and

makes

the

base

Q809

stop

the

motor

drive

circuit.

Meanwhile,

the

voltage

C807

discharged

increase

the

torque

for

the

time-constant

C807/

R822

just

after

the

end

ty.

Explanation

overall

operation

During

the

shift

OPEN/CLOSE

switch

S802,

from

OPEN

CLOSE,

Q802

becomes

“ON”

instant

and

flip

flop

which

composed

Q805

and

Q806

reset

cut

off

D806.

Consequently

motor

drive

circuit

which

composed

Q809,

Q808

and

O807

begins

operate

switch

the

drawer

motor.

When

the

drawer

comes

the

mechanical

end,

short-circuit

current

begins

flow

the

motor

generate

voltage

R820

about

1V.

This

voltage

reverses

Q803

cut

off

D804.

After

D804

cut

off,

C805

discharged

through

R807

and

Q804,

and

Q804

becomes

OFF

after

about

2.5

sec.

result,

the

collector

voltage

Q804

rises

set

the

above

flip

flop

through

R809/R810.

this

way,

the

motor

drive

circuit

becomes

OFF

again.

You

have

the

same

operation

also

when

S802

changed

from

OPEN.

But

Q801

has

been

added

that

Q808

which

increases

start

torque

can

become

without

fail.

CLOSE>OPEN

Q802

Collector

| |

Motor

Current

}

R820

Voltage

Joo

Position

DRAWER

Position

OPEN

Position

}

3.2

Remote

Control

Circuit

Outline

the

system

Marantz

Bus

System

general

term

this

remote

contro!

circuit.

Remocon

transmitter

and

remocon

receiver

are

necessary

operate

it.

The

output

the

remocon

receiver

connected

the

remocon

“IN”

terminal

the

rear

panel

the

CD-73.

The

remocon

transmitter

has

keys

for

play/next,

puase,

repeat

and

stop.

Operation

each

part

Q851

channel

Micro

Processer

for

remocon.

Q857

amplifies

signal

from

the

remocon

receiver

and

transmits

the

Micro

Processer.

O858

transistor

switch.

When

laser

signal

‘“S”

becomes

Low

level,

switches

‘“‘ON’’

and

changes

the

Micro

Processer

High

level

generate

easy

operation

signal

19.

This

easy

operation

signal

reversed

Q856

and

put

out

from

the

easy

“OUT”

terminal

the

CD-73.

This

signal

makes

easy

operation

possible.

Q853,

Q854

and

Q855

are

used

analogue

switches

and

controled

output

and

respective-

ly.

Q852

transistor

switch,

which

lowers

sense

signal

GND

level

stop

operation.

R852/D851/C856

are

used

for

initial

setting

the

Micro

Processer.

—

Overall

operation

When

any

key

the

remocon

transmitter

pushed,

pulse

signal

transmitted

the

CD-73

remote

“IN”

terminal

through

the

remocon

receiver.

This

signal

put

into

the

Micro

Processer

after

being

amplified

Q857

and

the

Micro

Processer

comes

correspond

the

key

generate

High

signal

the

output

follows.

play/next

........

ping

pause

...........

repeat...

.........

STOP

s(inane

eae

pin4

Besides,

only

when

the

play/next

key

pushed,

easy

Operation

signal

occurs

for

msec

mute

the

other

sources.

3588

ADJUSTMENT

PROCEDURES

FOR

DISC

CLAMPER

4.1

Adjusting

the

height

the

pressure

ring

holder

The

height

the

holder

must

adjusted

maintain

braking

keeping

the

appropriate

distance

between

the

holder

and

pressure

ring.

With

the

drawer

the

unit,

lift

the

holder

manually,

and

place

the

positioning

tool

the

turntable.

the

drawer

the

“out”

position,

the

alminum

cap

will

come

contact

with

the

front

chassis

and

front

panel,

and

will

scratched

when

the

drawer

pushed

into

the

unit.

With

screwdriver,

turn

the

adjustment

screw

clockwise

turns.

Push

down

the

holder

several

times

confirm

that

sinks

few

milimeters

until

makes

contact

with

the

positioning

tool.

there

play

between

the

holder

and

tool,

turn

the

adjustment

screw

further

until

few

milimeters

play

obtained.

Turn

the

adjustment

screw

counterclockwise

until

the

play

between

the

holder

and

tool

becomes

zero.

For

optimum

adjustment,

not

exert

excess

pressure

the

acdiustment

screw

with

the

screwdriver.

Apply

lock

paint

the

adjustment

screw.

Lift-the

holder

with

the

drawer

the

“in”

position,

and

remove

the

positioning

tool.

VOLTAGE

CONVERSION

EUROPEAN

MODEL

ONLY

convert

the

unit

different

power

source

voltage,

change

the

position

illustrated

the

drawing

below.

CAUTION

DISCONNECT

POWER

SUPPLY

CORD

FROM

OUTLET

BEFORE

CONVERTING

VOLTAGE.

Voltage

Conversion

Chart

240V

120V

220V

Hi0V

VOLTAGE

SELECTOR

Note

safety:

Symbol

Fire

electrical

shock

hazard.

Only

orignal

parts

should

used

replace

any

part

marked

with

symbol

“\

Any

other

component

substitution

(other

than

original

type),

may

increase

risk

fire

electrical

shock

hazard.

35.84

SIGNAL

BLOCK

DIAGRAM

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COMPONENT

LOCATIONS

(AND

WIRE

CONNECTIONS)

REMOTE

JACK

OUT

JACK

DECODER

PW.

BGARD

(P500)

Nee

“nem

bbe)

PRE

AMP

+LASER

‘a

ASSY

(AY40)

‘

£07

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SERVO

PW.

BOARD

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(P200)

POWER

TRANSFORMER

BLK

DRAWER

FUSE

MOTOR

FOO!

yoo!

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eles

sie

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tase

SELECTOR

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VERSION

POWER

P.W.

BOARD

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wool

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TRANS.

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FOO!

yoo!

vs02

DIAGRAM

AND

COMPONENT

LOCATIONS

8.1

Servo

(P200)

Schematic

Diagram

and

Component

Locations

RADIAL

ERROR

A274]

C274

(A174)

SERVO

P.W.

BOARD

(P200

1/2)

getatvayic)

(0474)

a2i2(1/4)(8)

LM324

}

C250

ite)

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aeiativana)

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MATAIIT

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casi]

agai

aay

(Arn)

—a2i3i1/4xc)

HEF4070B

0213

(1/410)

|R365

-1

HEF40708

oat

244

9.4E

Eas.

c287

FITéy

1000n}

RADIAL

WIR3E2

MOTOR

C233

‘

R386

aon

(e33K

C2324

232°

(4132)

R291

srs

a2iaa/4na)

€

R300

LM324

[tLovl

R302

2.2k)

SERVO

P.W.

BOARD

(P200

2/2)

R230

[470K]

BPR

ALA

alze)

R240

c2i1

100n

FOCUS

R222

Tizk)

MOTOR

R220

Eos

231

Asis

(#22k]

0208(1/2KB)

eos

FOCUS

MC1458

ERROR

ca7i

(_2.2k)

R223

€0.9)

(AI71)

wap

[100]

[100k]

C22t

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P1008

caran

27n

208.172}

fom

MCl4

Real

Q232

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202

eat

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R203

208

(A525)

MCES

>A3254,

C32

MCES

(4524)

MuTE

>43244,6324

MUTE

(A523)

P-BIT

>A32Z3h,

P-BIT

Efe

(A522)

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Q20701/3XC)

C27Tay

A272

(AI7T2)

HEF4025

(asen

HEL

A32N

C32!

bie

S530

zeal

HFL

(A782)

SENSE

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170

PORT

taven

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A294

OLEN

(A794)

sat

|c203

Aail

T™M

(ASI)

Q207(1/3KA)

0207(1/318)

HEF4025

HEF4O25

aziz

RAM

ADRESS

DATA

(ASI2)

A292

pata

(A792)

c2is,

c2ie

afree7

3134

ASI

crock

(A513)

R257

cir

R255

190n

10K

Aes

clock

(A793)

wag|c

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0233

40245

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acess

AMBaW62

eat

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a209(1/2118)

R262

TURNTABLE

15a

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R259

R260

R26I

R252

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—

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stop

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ree

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