Sony CDP-M72 User manual

CDP-M72

SERVICE

MANUAL

AEP

Model

UK

Model

E

Model

Modei

Name

Using

Similar

Mechanism

|

CDP-M71

CD

Mechanism

Type

CDM14-5BD1

BU-5BD1

TABLE

OF

CONTENTS

SPECIFICATIONS

Section

Title

Page

Outputs

DIGITAL

OUT

Wave

length

660

nm

(OPTICAL)

Output

level

-

18

dBm

1.

GENERAL

pele

Location

of

Controls

.........:ccccssesscccessserensereteeessssansenee

4

General

Power

requirements

Model

for

Continental

Europe

220

V

-

230

V

AC,

50/60

Hz

2,

ELECTRICAL

BLOCK

CHECKING

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

5

Mode

fot

the

United

Kingdom

Model

for

other

countries

110

-

120

V/220

-

240

V

50/60

Hz

Power

consumption

12W

3.

DIAGRAMS

1.

BIOCK

Diagram

...sssssssscscssssssssrsssssssceceeseceeeteee

7

“operon

ncludig

(w/a

(hax

vor

12/ches

3-2.

Semiconductor

Lead

Layouts

..........sseceeeee

11

iia

sae

eos

3-3.

Printed

Wiring

Boards

...........ssssesererereceseseees

12

eT

mes

3-4.

Schematic

Diagram

........ccccseeseeecneeeeeees

15

pep

apesaeh

lor

some

areas,

3-5.

IC

Block

Diagrams.

..........cscssessssesseseneesnees

19

F

Design

and

specifications

subject

to

change

without

notice.

3-6.

Functions

of

10401

0...

ee

eecseeeeeeeenees

21

This

Compact

Disc

player

is

classified

as

a

CLASS

1

4.

EXPLODED

VIEWS

CLASS

1

LASER

PRODUCT

LASER

product.

41,

Chassis:

Secton

-azsniissinintantioaieloatacan

22

Gee

VkAceeiPoe

The

CLASS

1

LASER

4-2.

CD

Mechanism

Section

...........-:ssccesseseeseeeeees

24

ee

be

is

located

F

:

t

extes

or.

4-3,

Optical

Pick-Up

BIOCK

..sssssssesssssssstseeseene

25

poe

ys

:

Ra

PARTS

LIST

scscsowscsseeeccensetvsies

26

C

0

Mi

PA

CT

D

|

§

C

p

L

AYE

R

=

SONY.

CDP-M72

|

PROTECTION

OF

EYES

FROM

LASER

BEAM

DURING

SERVICING

This

set

employs

a

laser.

Therefore,

be

sure

to

follow

carefully

the

instructions

below

when

servicing.

CAUTION

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

NOTES

ON

HANDLING

THE

OPTICAL

PICK-UP

BLOCK

OR

BASE

UNIT

The

laser

diode

in

the

optical

pick-up

block

may

suffer

electrostatic

break-down

because

of

the

potential

difference

generated

by

the

charged

electrostatic

load,

etc.

on

clothing

and

the

human

body.

During

repair,

pay

attention

to

electrostatic

break-down

and

also

use

the

procedure

in

the

printed

matter

which

is

included

in

the

repair

parts.

The

flexible

board

is

easily

damaged

and

should

be

handled

with

care.

NOTES

ON

LASER

DIODE

EMISSION

CHECK

The

laser

beam

on

this

model

is

concentrated

so

as

to

be

focused

on

the

disc

reflective

sureface

by

the

objective

lens

in

the

optical

pick-

up

block.

Therefore,

when

checking

the

laser

diode

emission,

observe

from

more

than

30

cm

away

from

the

objective

lens.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A\

OR

DOTTED

LINE

WITH

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.

1.

Laser

Diode

Properties

*

Material:

GaAlAs

*

Wavelength:

780nm

¢

Emission

Duration:

continuous

¢

Laser

Output:

max.44.6.W*

*

This

output

is

the

value

measured

at

a

distance

of

about

200mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

2.

During

service,

donot

take

the

Optical

Pick-up

Block

apart,

and

do

not

adjust

the

APC

circuit.

If

there

is

a

breakdown

in

the

APC

circuit

(including

laser

diode),

replace

the

entire

Optical

Pick-

up

Block

(including

APC

board).

LASER

DIODE

AND

FOCUS

SERCH

OPERATION

CHECK

1.

Make

POWER

switch

on

with

no

disc

inserted

and

disc

table

closed.

2.

Confirm

that

the

following

operation

is

performed

while

observ-

ing

the

objective

lens.

@

Confirm

that

laser

beam

is

spread.

e

Up

and

down

motion

of

the

objective

lens.

(3

times)

A

pstehiembeche

aninatouboeneo6-atthe

vs

eae

|

CDP-M72

MODEL

IDENTIFICATION

-

SPECIFICATION

LABEL

-

CDP-M72

SONY.

MODEL

NO.

VLLLLLL

COMPACT

DISC

PLAYER

MMMM

UK

MODEL

Acz4OV,

S060,

12

E,

Saudi

Arabia

MODEL:

AC110-120,

220-240V,

50/60Hz,

12W

MADE

IN

JAPAN

:

Japan

Made

Model

MADE

IN

FRANCE

:

France

Made

Model

CDP-M72

|

LOCATION

OF

CONTROLS

[1]

POWER

switch

[2]

Disc

tray

REPEAT

button:

[4]

A.

SPACE

(auto

space)

button

[5]

4

OPEN/CLOSE

button

[6]

MUSIC

SCAN

button

PEAK

SEARCH

button

[8]

FADER

button

[9]

EDIT/TIME

FADE

button

CONTINUE

button

and

indicator

SHUFFLE

button

and

indicator

PROGRAM

button

and

indicator

SECTION

1

GENERAL

This

section

is

extracted

from

instruction

manual.

{23}

[22]

[21]

(20)

[r9}fsej17]

[46

[15]

Numeric

buttons

CLEAR

(program

clear)

button

>

20

(over

20)

button

CHECK

(program

check)

button

<<

BP

(manual

search)

buttons

TIME

SET

button

[19]

<4

&

PI

AMS")

buttons

[20]

@

(stop)

button

Il

(pause)

button

>

(play)

button

[23]

TIME

button

Display

window

*

AMS

is

an

abbreviation

of

Automatic

Music

Sensor.

|

CDP-M72

SECTION

2

ELECTRICAL

BLOCK

CHECKING

Note

:

1.

CDBlock

basically

constructed

to

operate

without

adjustment.

Therefore,

check

each

item

in

order

given.

2.

Use

YEDS-18

disc

(3-702-101-01)

unless

otherwise

indicated.

3.

Use

the

oscilloscope

with

more

than

10OMQ

impedance.

4.

Clean

an

object

lens

by

an

applicator

with

neutral

detergent

when

the

signal

level

is

low

than

specified

value

with

the

following

checks.

S

Curve

Check

oscilloscope

BD

board

a“

TP

(FEQ)

©

TP

(VC)

Procedure

:

1.

Connect

oscilloscope

to

test

point

TP

(FEO)

on

BD

board.

2.

Connect

between

test

point

TP

(FES)

and

TP

(VC)

by

lead

wire.

3.

Turned

Power

switch

on

and

actuate

the

focus

serch.

(actuate

the

focus

serch

when

disc

table

is

moving

in

and

out.)

Check

the

oscilloscope

waveform

(S

curve)

is

symmetrical

between

A

and

B.

And

confirm

peak

to

peak

level

within

341

Vp-p.

4.

S

curve

waveform

symmetry

within

3£1Vp-p

5.

After

check,

remove

the

lead

wire

connected

in

step

2.

Note:

»

Try

to

measure

several

times

to

make

sure

that

the

ratio

of

A:

B

or

B:

A

is

more

than

10:

7.

°

Take

sweep

time

as

long

as

possible

and

light

up

the

brightness

to

obtain

best

waveform.

RF

Level

Check

oscilloscope

BD

board

a

TP

(RFQ)

©

TP

(VC)

©

Procedure

:

1.

Connect

oscilloscope

to

test

point

TP

(RFO)

on

BD

board.

2.

Turn

Power

switch

on.

3.

Put

disc

(YEDS-18)

in

and

playback.

4.

Confirm

that

oscilloscope

waveform

is

clear

and

check

RF

signal

level

is

correct

or

not.

Note

:

Clear

RF

signal

waveform

means

that

the

shape

“

0”

can

be

clearly

distinguished

at

the

center

of

the

waveform.

VOLT/DIV

:

200mV

RF

RY

waveform

TIME/DIV

:

500nS

RY

NH

Ve

)

ANY

yy

WN

mee

WHINY

|

12222

veer

E-F

Balance

Check

oscilloscope

BD

board

TP

(TEO)

©

TP

(VC)

©

Procedure

:

1.

Connecttest

point

TP

(ADJ)

to

ground

and

TP

(TES)to

TP(VC)

with

lead

wire.

;

Connect

oscilloscope

to

test

point

TP

(TEO)

on

BD

board.

Turn

Power

switch

on.

Put

disc

(YEDS-18)

in

and

playback.

Confirm

that

the

oscilloscope

waveform

is

symmetrical

on

the

top

and

bottom

in

relation

to

OV,

and

check

this

level.

VPwh

Traverse

oscilloscope

i

I"

|

symmetry

Level

:

2£1Vp-p

6.

Remove

the

lead

wire

connected

in

step

1.

CDP-M72

|

RF

PLL

Free-run

Frequency

Check

Procedure

:

1.

Connect

frequency

counter

to

test

point

(PLCK)

with

lead

wire.

frequency

counter

Main

board

Comnestemen)

TP

(PLCK)

2.

Turn

Power

switch

on.

3.

Confirm

that

reading

on

frequency

counter

is

4.3218MHz.

Focus/Tracking

Gain

This

gain

has

a

margin,

so

even

if

it

is

slightly

off.

There

is

no

problem.

Therefore,

do

not

perform,

this

adjustment.

Please

note

that

it

should

be

fixed

to

mechanical

center

position

when

you

moved

and

do

not

know

original

position.

ADJUSTMENT

LOCATIONS

[

BD

BOARD

]

-

Conductor

Side

-

[

MAIN

BOARD

]

-

Component

Side

-

Hae

RiaaMiienetin

dete

case

SECTION

3

DIAGRAMS

3-1.

BLOCK

DIAGRAM

1c

101

IC

301

xRST

(0)

FOCUS

/TRACKING/SLED

SERVO

DIGITAL

SIGNAL

PROCESSOR

EFM

COMPARATOR

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/

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KSS-240A

|

OPTICAL

PICK-UP

BLOCK

X301

=

16.9344MHz

Q393

&

BUFFER

—

Q392

SWITCH

FLD

DRIVE

/

MASTER

CONTROL

D-A,

8G-IG,P-E

TRACKING

COIL

ORIVE

LASER

TRACKING

DIQOE

coIL

©

C)

RESET

SWITCH

;

Q206

ZZ

S272

$271

Q204

LOAD

IN

LOAD

OUT

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—

a

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SWITCH

tone

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LOADING

1C102

SPINDLE

MOTOR

19

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DRIVE

“

MOTOR

FLD40!

SPINDLE/SLED

DRIVE

DISPLAY

45V

MOTOR

DRIVE

$401

~

406,7

$408

~

410,

4.

S412~

444

SLED

MOTOR

SPINDLE

MOTOR

$10!

MIOl

M102

LIMIT

FUNCTION

MI9I

SWITCH

LOADING

MOTOR

E,

Saudi

Arabia

MODEL

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DIGITAL

OUTPUT

DIGITAL

OUT

OPTICAL

a

°o

=

oO

uw

a

uw

no

VOLTAGE

CN39!

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Q392

SWITCH

AEP/UK

MODEL

F

7

|

F

=

1C201

B30

(3)

-30v

REG

(1)

(4)

Q206

Q205

D203

~

206

RESET

SWITCH

oo

SWITCH

ON

/OFF

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see

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SWITCH

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$491

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Q203

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REG

Q207,208

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AC

IN

3-2.

SEMICONDUCTOR

LEAD

LAYOUTS

DTA144ES

DTC114ES

DTC144ES

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RD4.7M-B1

cathode

|

anode

RD6.8ES-B2

RD7.5JS-B2

RD9.1ES-B2

1SS120

11ES2

athode

anode

@

SEMICONDUCTOR

LOCATION

*

o——-:

indicated

a

lead

wire

mounted

on

the

component

side.

:

parts

mounted

on

the

conductor

side.

:

Through

hole.

:

Pattern

from

the

side

which

enables

seeing.

1:

Pattern

of

the

rear

side.

:

Saudi

Arabia

Model

3-3.

PRINTED

WIRING

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|

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Sony CDP-M72 User manual

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