Sony Discman D-50MkII User manual

Ne

|

]

_

[REVISED

Discard

D-50MkH/D-7S

SERVICE

MANUAL

(No.

9-952-109-11)

previously

issued.

STEP/MIN

“SEC

Refer

to

BP-200

Service

Manual

issued

previously

for

information

of

rechargeable

battery

pack

supplied

with

this

set.

US

Model

Canadian

Model

‘D-SOMkII:

AEP

Model

UK

Model

_

E

Model

_

AUS

Model

FRENCH

Model

|

Dutch

Model

Pisthan

SPECIFICATIONS

System

Compact

disc

digital

audio

system

General

Disc

Compact

disc

Power

requirements

Lead

acid

battery

(closed

type)

Material:

GaAlAs

Wavelength:

780nm

Emission

duration:

Continuous

Laser

output:

Max.

0.4mvV*

*This

output

is

the

value

measured

at

a

distance

of

about

1.6

mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

500r.p.m.

to

200r.p.m.

(CLV)

Laser

diode

properties

Spindie

speed

Scan

velocity

1.2-1.4misec.

Error

correction

Sony

Super

Strategy

Cross

Interleave

Reed

Solomon

Code

Number

of

channels

2

D-A

conversion

16-bit

linear

Frequency

response

20--20,000

Hz‘}dB

Total

harmonic

distortion

Less

than

0.008

%

Oynamic

range

More

than

90d8

(1

kHz)

Wow

and

flutter

Below

measurable

limit

Outputs

(at

9V

input

level)

Line

output

(stereo

minijack)

Output

level

1.6V

rms

Load

impedance

over

10

kilohms

Headphones

(stereo

minijack)

30

mW

+

30

MW

at

32

ohms

CAUTION

@

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

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.

using

Sony

BP-200

rechargeable

battery

pack

(supplied),

6V

Eight

IEC

designation

LR6

atkaline

batteries

(size

AA)

using

Sony

EBP-380

battery

case

(optional),

12V

DC

IN

9V

jack

accepts;

Sony

ac

power

adaptor

(supplied)

For

use

in

US,

Canadian

Model

on

120V

ac,

60

Hz

For

use

in

UK,

AUS

Model

on

240V

ac,

50

Hz

For

use

in

AEP,

Dutch

Model

on

220V

ac,

50

Hz

For

use

in

E

Model

on

110,

120,

220,

or

240V

ac,

50/60

Hz

Sony

DCC-120

car

battery

cord

(optional)

for

use

on

12V

car

battery

Power

consumption

2.6W

dc

Dimensions

Approx.

125.927

x

125.9mm

(w/hid)

(5x

1/,x5

inches)

not

incl.

inclined

part

(depth)

not

inct.

projecting

parts

and

controls

Approx.

126.9

«31.5

132.5

mm

(wihid)

(5x

1/,x5Y,

inches)

incl.

projecting

parts

and

controls

Weight

Approx.

510g

(11!b

2.02),

net

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

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

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

COMPACT

DISC

COMPACT

PLAYER

MICROFILM

SONY.

FEATURES

@

Extremely

compact

size

for

easy

carrying

@

High

performance

and

high

fidelity

@

AMS

(Automatic

Music

Sensor)

for

quick

location

of

selections

@

Search

function

for

quick

location

of

a

desired

point

in

a

particular

selection

@

RMS

(Random

Music

Sensor)

allows

selections

to

be

played

in

a

specified

order.

©

Shuffle-play

function

repeatedly

plays

selections

in

a

random

order.

@

Repeat

functions

for

the

whole

disc

and

for

a

particular

portion

@

Digital

readout

display—the

track

number

on

the

disc

and

the

elapsed

or

re-

maining

playing

time

are

shown

on

the

LCD

(Liquid

Crystal

Display)

window.

TROUBLE

SHOOTING

GUIDE

Disc

play

does

not

start.

@

The

POWER

switch

is

set

to

OFF.

@

The

disc

is

inserted

with

the

labeled

surface

face

down.

@

The

disc

is

incorrectly

inserted.

@

Dusty

or

defective

disc

@

Dirty

or

dusty

lens

@

The

disc

compartment

lid

is

not

closed.

@

Moisture

condensation

@

The

ac

power

adaptor

is

not

plugged

to

the

wall

outtet.

@

Weak

battery

@

The

car

battery

cord

is

not

firmly

connected.

No

sound

from

headphones

@

The

headphones

plug

is

not

firmly

connected

to

the

PHONES

jack.

No

sound

from

speakers

@

Incorrect

connections

@

The

amplifier

is

not

turned

on,

Skipping

of

sound

@

Dirty

or

defective

disc

@

Dirty

lens

@

Strong

vibration

MAINTENANCE

CLEANING

THE

CASING

‘

Clean

the

casing

with

a

soft

cloth

slightly

moistened

with

water

or

mild

dete:

gent

solution.

Do

not

use

any

type

of

abrasive

pad,

scouring

powder

or

solve=i

such

as

alcohol

or

benzine

as

they

may

mar

the

finish

of

the

casing.

CLEANING

THE

LENS

If

you

have

accidentally

touched

the

lens

with

a

dirty

finger

or

the

dust

ont

t

lens

prevents

the

set

from

operating

properly,

open

the

disc

compartment

ti

with

the

OPEN

button

and

clean

the

lens.

To

remove

dust

Blow

on

the

lens

a

few

times

with

a

commercially

available

blower,

brush

t

dust

away

in

the

direction

of

the

arrow,

then

blow

on

the

lens

again.

Blower

NOTES

ON

COMPACT

DISCS

O.

Handle

the

disc

by

its

edge,

and

|

keep

the

disc

clean

do

not

touch

tf

rainbow

colored

surface.

apa

|

Do

not

stick

paper

or

tape

nor

wer?

anything

on

the

labeled

surface.

Do

not

expose

the

disc

to

direct

sunlight

or

heat

sources

such

as

hot

air

duct

nor

leave

it

in

a

car

parked

in

direct

sunlight

where

there

can

be

a

considera

t?

rise

in

the

temperature.

Before

playing,

clean

the

disc

with

the

optional

cleaning

cloth.

Wipe

the

disc

from

the

center

out.

Do

not

use

solvents

such

as

benzine,

thinner,

commercially

available

cleaners

or

anti-static

spray

intended

for

analog

discs.

After

playing,

store

the

disc

in

its

case.

ey

perpen

mae

ge

ae

gap

eee

et

pny

EET

FPR

OT

pre

eee

epee

ce

omens

Servicehilfe

Datum:

25.08.86

Ref.:

DA-O3886

Modell:

D-SOMKII

(D-7S)

DISC-TELLER

DREHT

SICH

NICHT

Code:

Has/scho

Fehlererscheinung:

Der

Disc-Teller

drenht

sich

nicht,

obwohl

der

Disc-Motor

lauft.

Ursaches

Das

Yahnmrad

des

Disc-Tellers

ist

auf

der

Welle

ver-

ruts\ent.

Gbhilfe:

Zahnrad

des

Disc-Tellers

aut

die

Messinghiilse

der

Welle

he

schieben,

Sicherungslack

auftragen

und

das

Zahnrad

mit

}

dem

Stopper

festsetzen.

Varfahrens

1.

Disc-Teller

in

Ffeilrichtung

driicken

und

Zahnrad

aufstecken

(siehe

Bild

1).

Zahnrad

ne

:

AE

Poa

4

\pise-Teller

Se

Messinghiilse

so

weit

herunterdriicken,

dai

sie

biindig

mit

der

Oberflache

des

Zahnrades

abschliefit

(Bild

2).

tehatoen)

Fephod

a2:

Arieibeatiies

|

bo

Abteilung

Technische

Information

a

“SONY

DEUTSCHLAND.

GmbH,

Hugo-Eckener-StraBe

20,

5000

Koln

30,

Tel.:

(02

21)

5966-1

SONY

Servicehilfe

|

Sicherungslack

auf

die

Anschiufistelle

auftragen,

dabei

den

Disc-Teller

drehen.

aN)

Sicherungslack

4.

Disce-Teller

entsprechend

Hild

1

nach.oben

driicken

und

gleich-

zeitiqg

den

Stopper

1

anbringen

und

mit

dem

dazugehorigen

Stabchen

fest

andritcken.

Reparatursatz

-

ET.-Nr.:

X-4907-035-1

Abstandsstiicke

so

/

we

|

Stabchen

74

FTrvrcsineenoe

snot

HULL

——————

5.

Hoheneinstellung

des

Disc-Tellers

Konterschraube

entsprechend

der

Dicke

des

Abstandsringes

justieren;

die

Disc-Tellerhdhe

lafst

sich

durch

Abstandsstiicke

verandern.

(Im

Reparatursatz

enthalten)

Zahnrad

Disc-Teller

Finstellverfahren:

1.

Konterschraube

um

120

Grad

nach

rechts

dre-

hen.

2.

Konterschraube

mit

Lack

sichern.

Anmer

kung:

Die

Konterschraube

nicht

zu

fest

anziehen,

da

Sich

sonst

die

Héhe

verandert,

sobald

der

Schraubendreher

herausgezogen

wird.

Abteilung

Technische

Information

a

SONY

DEUTSCHLAND

GmbH,

Hugo-Eckener-StraBe

20,

5000

KOin

30,

Tel:

(0221)

59

66

-1

Sa

'—

CAUTION

FOR

ELECTROSTATIC

BREAKDOWN

—

NOTES

ON

HANDLING

THE

OPTICAL

PICK-UP

BLOCK

(KSS-110G)

The

laser

diode

in

the

optical

pick-up

block

may

1.

Place

a

conductive

sheet

on

the

workbench.

suffer

electrostatic

breakdown

because

of

the

poten-

(The

black

sheet

used

as

repair

parts

wrapping).

tial

difference

generated

by

the

charged

electrostatic

2.

Place

the

set

on

the

conductive

sheet

so

that

load,

etc.

on

clothing

and

the

human

body.

}

the

chassis

touches

the

sheet.

(This

makes

it

the

The

printed

matter

below

is

included

in

the

repair

same

potential

as

the

conductive

sheet).

arts,

During

repair,

use

the

procedure

in

the

printed

:

ca

P 7

3.

Place

your

hands

on

the

conductive

sheet.

(This

matter.

:

The

flexible

board

is

easily

damaged

and

should

be

makes

them

the

same

potential

as

the

sheet).

handled

with

care.

4.

Remove

the

optical

pick-up

block.

The

following

method

is

an

example

for

reference

5.

Perform

work

on

top

of

the

conductive

‘sheet.

purposes:

Be

careful

that

clothing

does

not

touch

the

optical

pick-up

block.

Printed

Matter

Included

in

the

Repair

Parts

When

opening

or

repairing

the

unit,

the

procedure

for

grounding

as

follows

is

required

to

prevent

damage

caused

by

static

electricity.

Grounding

for

the

human

body

Be

sure

to

put

on

a

wrist-strap

for

grounding

(with

impedance

lower

than

10®

(2)

whose

other

end

is

grounded,

The

strap

works

to

drain

away

the

static

electricity

build-up

on

the

human

body.

Grounding

for

the

work

table

Be

sure

to

lay

on

the

table

a

conductive

sheet

(with

impedance

lower

than

10°

Q)

such

as

sheet

of

copper,

which

is

grounded.

As

static

electricity

build-up

on

clothes

is

not

drainded

away,

be

careful

not

to

let

your.clothes

touch

the

unit.

Handling

the

flexible

board

The

flexible

board

is

easily

damaged

and

should

be

handled

with

care.

@

Wrist-strap

for

grounding

The

unit

Chip

Component

Indications

The

official

specifications

which

are

presently

indicated

are

EIAJ

standard.

(1)

MELF

(leadless):

EIAJ

RC-8001

(2)

Square

chip

components

(laminated

ceramic):

EIAJ

RC-3699.

Square

chip

resistors

are

presently

under

study

by

EIAJ.

The

following

explanation

covers

square

chip

components

(MELF

omitted).

1.

2-letter

Method

(EIAJ

RC-3699)

e

Letter

combination:

@

Letter

meaning:

letter

+

1

number

letter

=

effective

numeric

“number

=

multiplier

*

The

units

used

are

pF

for

capacitors

and

Q

(ohm)

for

resistor.

(This

is

mainly

used

for

Symbol

and

Numeric

and

Multi-

plist

capacitors.)

ESOC

nG

cone

fwamere|t

[i.fra[valis|ie|tal2

[ealaaiaa|

juste

[wwe

otal

s

|r}

uly

(wl

x!

[Numeio|3_|3.3]36/2.0]4.9|4.7/6.1[5.6]82]6¢/7.5|

Se

eee

1x

10!

E3

1.5

x

10°

=

10

pF

(or,

1022)

=

1500

pF

(or,

1.5

kQ)

2.

3-number

Method

(Mainly

used

for

chip

resistors)

°

Number

meaning:

Ist

and

2nd

number

=

effective

numeric

3rd

number

=

multiplier

of

10

.

Unit:

.pF

for

capacitor,

for

resistor

—

1000092

=

10

kQ

(or,

0.01

uF)

2200002

=

220

kQ

(or,

0.22

uF)

@

Ex.:

103

10

x

10°

224

22

x

10*

3.

4-letter

Method

(used

for

capacitor)

@

Letter

combination:

@

Letter

meaning:

3

numbers

+

1

letter

number

=

effective

numeric

+

multiplier

of

10

(same

as

3-number

method)

letter

=

capacitor

response

®

Symbol

and

Response

(

For

temperature

compensation

)

emis

Te

[*[*

[8]

[vor

[Rewonm

[os]

ra

[na

[se

[ra

[us

[st

|

A

is

temperature

coefficient

tolerance,

and

is

G,

H,

J,K.

(For

high

dielectric

constant)

—

symoo

[

[2

Frenne

|e [F

|

@

Ex.:

47

a

m=

47x

10°

=

47000pF

=

0.047uF

F

response

[Fe

|p

sss

=

150pF

22

?|>

22x10?

=

2200pF

RA

response

SL

response

Replacing

chip

components

All

chip

components

should

be

connected

and

disconnect-

ed,

using

a

tapered

soldering

iron

[temperature

of

the

iron

tip:

less

than

280°C

(536°F)],

a

pair

of

tweezers

and

braid-

ed

wire.

Precautions

for

replacement

1.

Do

not

disconnect

the

chip

component

forcefully.

Otherwise,

the

pattern

may

peel

off.

2.

Never

re-use

a

disconnected

chip

component.

Dispose

of

all

old

chip

components.

_

3.

To

protect

the

chip

component,

heating

time

for

attach-

ing

the

component

should

be

within

3

seconds.

©

Removing

chip

components

(1)

Removing

solder

at

electrode

Remove

the

solder

at

the

electrode,

using

a

thin

braided

wire.

Do

not

remove

the

solder

of

the

part

(chip

component)

attached

adjacent

to

the

electrode.

Pattern

Soldering

iron

Braided

wire

(2)

Disconnecting

chip

components

Turn

the

tweezers

with

the

soldering

iron

alternately

applied

to

both

electrodes,

and

the

chip

component

will

be

disconnected.

Take

careful

precautions

while

disconnecting,

because

if

the

chip

component

is

force-

fully

removed

the

land

may

peel

off.

_

Never

re-use

a

disconnected

chip

component.

Tweezers

—

Turn

(3)

Smoothing

the

soldered

surface

hoied

After

disconnecting

the

chip

component,

remove

the

solder

by

using

a

braided

wire

to

smooth

the

land

surface.

;

©

Connecting

chip

components

The

value

of

chip

components

is

not

displayed

on

the

main

body.

Take

due

precautions

to

avoid

mixing

new

chip

components

with

other

ones.

(1)

Applying

solder

to

land

on

one

side

Apply

a

thin

layer

of

solder

to

the

land

on

one

side

where

the

chip

component

is

to

be

connected.

Too

much

solder

may

cause

bridging.

Small

quantity

of

solder

a

(2)

Speedy

soldering

Hold

the

chip

component

at

the

desired

position,

using

tweezers,

and

apply

the

soldering

iron

in

the

arrow-marked

direction.

To

protect

the

chip

compo-

nent,

heating

time

should

be

within

3

seconds.

oA

Soldering

iron

Land

Printed

circuit

board

(3)

Speedy

soldering

of

electrode

on

the

other

side

Solder

the

electrode

on

the

other

side

in

the

same

—

way

as

in

(2)

above.

:

Flexible

Circuit

Board

Repairing

é

To

make

thermal

controller

of

soldering

iron

connector

1.

Keep

the

temperature

of

the

soldering

iron

at

270°

+

10°C

during

repairing.

You

can

maintain

the

temperature

of

the

soldering

iron

around

270°C

by

using

the

ther-

mal

controller

as

illustrated

on

the

right.

2.

Do

not

touch

the

soldering

iron

more

than

4

seconds

or

3

times

on

the

same

conductor

of

the

circuit

board.

3.

Do

not

apply

force

on

the

conductor

when

soldering

or

unsoldering.

(voltage

resistant:

1.4kV)

_

Part

No.

8-719-210-66

Tip

of

soldering

iron

solder

good

wrong

eee

ae

OR

EEA

COE

soldering

iron

=

ASS

wind

insulating

tape.

===

PC

BOARDS/SWITCH/MOTOR

LAYOUTS

optical

pick-up

block

(FOP)

sled

motor

(M901)

open/close

switch

limiter

board

KSS-110G

(S802)

servo

board

laser

on

switch

(S507)

LCD

module

(ND801)

P

Power

switch

(S401)

,

spindle

motor

(M902)

SW

board

limit

switch

(S807)

SERVICE

MODE

(service

program)

As

shown

on

page

17,

the

program

on

this

set

selects

either

service

program

routine

or

normal

routine

after

power

supply

is

connected

and

a

RESET

signal

enters.

When

it

enters

service

program

routine,

the

microcomputer

brings

the

necessary

job

from

each

subroutine

corresponding

to

the

key

input,

and

executes

that

job.

Opera-

tion

check

can

be

performed

efficient-

ly

using

this

mode.

The

operation

method

of

service

mode

is

explained

below.

,

iS

MKEY

PRESSED?

s809

CHECK

(IC8o1

‘®)

YES

_

SERVO

ALL

OFF

POWER

ON

INITIAL

SETTING

LCD

LIGHTING

START

iS

PERKEY

—-—

POWER

ON

RESET

PRESSED?

YES

$806

CHECK

(1c801

(14))

a

FOCUS

ON

ARE

SPINDLE

veg

“

MOTOR

ROTATED?

(PAGE

9

FIG.

4)

.

NO

SPINDLE

AUTO

IS

PRIOR

Ke

KEY

PRESSED?

YES

$807,

808_CHECK

(1C801

42),

43)

NO

TRACKING

SERVO TURNS

OFF

AND

OPTICAL

PICK-UP

MOVES.

IS’

KEY-MODE

KEY

PRESSED?

YES

S805

CHECK

(1C801

)

NO

TRACKING,

SLED

SERVO

ON

IS

REMAIN

KEY

PRESSED?

$804

CHECK

(IC801

@6))

YES

LCD.

DISPLAY

STOP

Fig.

1

Service

Program

Flow

Chart

—7J—-

NOTES

ON

LASER

DIODE

EMISSION

CHECK

The

laser

beam

on

this

model

is

concentrated

so

as

to

be

focused

on

the

disc

reflective

surface

by

the

objec-

tive

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,

Laser

Diode

Check

Procedure

The

laser

diode

on

this

set

will

not

emit

unless

the

top

panel

is

closed

and

S501

(terminal

sorting

type),

$802

(leaf

SW

type)

are

turned.

on.

:

Focus

search

can

be

operated

in

service

mode

even

if

S802

is

OFF,

so

that

the

laser

diode

will

emit

if

$501

(terminal

shorting

type)

are

turned

on

in

this

mode.

The

laser

diode

is

checked

using

the

current

value

which

flows

to

the

laser

diode

inside

the

FOP.

Procedure

1

(service

mode

or

normal

operation).

Check

the

laser

diode

emission

with

the

eye.

1,

Open

upper

panel

and

turn

$501,

802

on

as

Fig.

5.

In

the

service

mode,

turn

on

$501

only.

2.

Press

the

pill

key.

3.

Observe

the

objective

lens

and

confirm

that

the

laser

diode

is

emitting

light.

At

this

time,

the

laser

diode

goes

on

about

3

seconds

due

to

focus

search.

If

it

does

not,

APC

circuit

or

FOP

is

defective.

Short-circuit

with

tweezers.

Procedure

2

(service

mode

or

normal

operation).

Check

by

the

curent

with

flows

in

the

laser

diode.

1.

Close

the

top

panel.

2.

Remove

the

main

board

and

read

the

current

value

on

the

label

affixed

to

the

FOP.

(Label

on

FOP)

SONY

Japan

LASER

POWER

0.4mW

MAX.

KSS-110G

07740

_

current

value

This

means

49.9

mA,

The

current

value

varies

with

the

set.

3.

Connect

a

VOM

as

shown

in

Fig.

6.

4.

Press

the

>

key,

5.

Calculate

the

current.

by

the

VOM

reading.

VOM

reading

(V)

+

19.5

=

current

(A).

ex.

VOM

reading

=

0.97

V

;

0.97

=

19,5

=

0.0497

(A)

=

49.7

(mA)

6.

Confirm.that

the

ammeter

reading

is

within

the

range

given

below,

value

on

label

}mA

(25°C)

variation

relative

to

temperature:

0.4

mA/°C

|

(Current

increases

when

temperature

rises

and

decreases

when

it

drops.)

If

the

value

is

more

than

the

range

given,

APC

circuit

has

been

defective

or

the

laser

diode

has

deteriorated,

If

it

is

less,

APC

circuit

or

FOP

is

defective.

VOM

(dc

3

V

range)

Fig.

6

VOM

Connection

Sony Discman D-50MkII User manual

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