Teac VRDS-10 User manual

Table of contents

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TEAC,

(ajieler

“w68

es

9298.

SERVICE

MANUAL

VRDS-10

Compact

Disc

Player

COMPACT

glise

DIGITAL

AUDIO

Effective

:

October,

1992

5704962700

VRDS-10

1

SAFETY

INFORMATION

SAFETY

INFORMATION

This

product

has

been

designed

and

manufactured

according

to

FDA

regulations

“title

21,

CFR,

chapter

1,

subchapter

J,

based

on

the

Radiation

Control

for

Health

and

Safety

Act

of

1968”,

and

is

classified

as

class

1

laser

product.

There

is

not

hazardous

invisible

laser

radiation

during

operation

because

invisible

laser

radiation

emitted

inside

of

this

product

is

completely

confined

in

the

protective

housings.

The

abel

required

in

this

regulation

is

shown

(1).

CAUTION

@

If

you

remove

the

above-mentioned

housings

under

the

operating

state

of

the

product,

there

is

a

possibility

of

human

access

to

the

invisible

,

laser

radiation

emitted

from

the

optical

pickup.

Pay

careful

attention,

not

to

let

the

invisible

laser

beam

enter

into

your

eyes.

@

If

you

find

a

troubled

state

of

the

laser

diode,

change

to

the

specified

new

optical

pickup.

@

If

you

find

a

troubled

state

of

safety

interlock

parts,

change

to

the

same

type

parts

described

in

parts

list.

CERTIFICATION

THIS

PRODUCT

COMPLIES

WITH

DHHS

RULES

21

CFR

SUBCHAPTER

J

APPLI-

CABLE

AT

DATE

OF

MANUFACTURE.

TEAC

CORPORATION

3.7-3

NAKA-CHO,

MUSASHINO-SHI

TOKYO,

JAPAN

MANUFACTURED

me

Optical

pickup:

Type

:

KSS-151A

Manufacturer

:

SONY

Corporation

Laser

output

:

Less

than

0.2

mW

on

the

objective

lens

For

U.S.A.

Wavelength

:

760

~

800

nm

*

CAUTION

*

ACHTUNG

*

OBSERVERA

*

ADVARSEL

@M

THIS

LABEL

IS

ATTACHED

TO

THE

PLACE

AS

ILLUSTRATED

TO

INFORM

THAT

THE

APPARATUS

CONTAINS

A

LASER

COMPONENT.

:

CD

DIESE

AUFKLEBEMARKE

IST

AN

DEM

IN

DER

ABBILDUNG

GEZEIGTEN

ORT

;

ANGEBRACHT

UM

DARAUF

HINZUWEISEN,

DASS

IM

INNERN

DES

GERATS

EINE

LASER-KOMPONENTE

BEFINDET.

oO

PASKRIFTEN

SITTER

PA

APPARATEN

SOM

VISAS

SOM

UPPMANING

OM

ATT

APPARATEN

OMFATTAR

EN

INBYGGD

LASERKOMPONENT.

‘oO

DETTE

MAERKAT

ER

ANBRAGT

SOM

VIST

|

ILLUSTRATIONEN

FOR

AT

ADVARE

BRUGEREN

OM

AT

APPARATET

INDEHOLDER

EN

LASERKOMPONENT.

@)

DETTE

MAERKAT

ER

SOM

VIST

PA

ILLUSTRATIONEN

ANBRAGT

PA

INDERSIDEN

AF

TOPDAEKSLET

FOR

AT

ADVARE

BRUGEREN

OM

AT

YDERLIGERE

FREMTRA-NGEN

VIL

VERE

FORBUNDET

MED

FARE

FOR

AT

UDS/ETTE

SIG

FOR

LASERSTRALING.

ADVARSEL

—

BETJENING

AF

ANDRE

KONTROLLER

OG

REGULATORER

ELLER

BENYTTELSE

AF

ANDRE

FREMGANGSMADER

END

BESKREVET

HERI

ER

FOR-

BUNDET

MED

FARE

FOR

UDSAETTELSE

FOR

LASERSTRALING.

VARNIG:

APPARATEN

INNEHALLER

LASER

KOMPONENT

MED

STRALNING

OVERSTIGANDE

KLASS

1

“ADVARSEL:

USYNLIG

LASERSTRALING

VED

ABNING

NAR

j

SIKKERHEDSAFBRYDERE

ER

UDE

AF

FUNKTION.

UNDGA

UDSAETTELSE

FOR

STRALING”

“VAROITUS!

SUOJAKOTELOA

El

SAA

AVATA.

LAITE

SISALTAA

LASERDIODIN.

JOKA

LAHETTAA

(NAKYMATONTA)

SILMILLE

VAARALLISTA

LASERSATEILYA’.

CLASS

1

LASER

PRODUCT

LUOKAN

1

LASERLAITE

KLASS

1

LASERAPPARAT

VRDS-10

2

SPECIFICATIONS

{t

AUDIO

(A-F

44)

Number

of

Channels

2

A-FAt

AF

vr

VAR

2FeVAay

Frequency

Response

1

—

20,000Hz

+

0.3dB

ARBRE

1~20,000Hz

+

0.3dB

Signal

to

Noise

Ratio

Better

than

110dB

(1kHz)

SN

EE

110dB

LIE

(1kHz)

Dynamic

Range

'

Better

than

Q99dB

(1kHz)

PAF

S9IVYY

99dB

t_F

(

1kHz)

Harmonic

Distortion

0.0013%

(1kHz)

oh

pees

0.0013

%ELF

(1kHz)

Wow

and

Flutter

Unmeasurable

(Quartz

accuracy)

JO

DIBy9I-

AE

PRARMB

LL

OKIE)

Channel

Separation

Better

than

110dB

(1kHz)

FeVRNENL-Yay

110dBUAE(1kHz)

Output

Analog

2.2Vrms

TFOTHA

2.2Vrms

Digital

0.5Vp-p/

75

Q

(Coaxial)

FVINWKHA

0.5Vp-p/75

2

(COAXIAL)

-15dBm

—-21dBm

(Optical)

—

15~-

21dBm

(OPTICAL)

Bitstream

Conversion

8-times

oversampling

20-bit

digital

filter

D/A

Converter

Digital

Filter

Analog

Filter

3rd

order

Butterworth

filter

PICK

UP

Type

Optical

3-Beam

laser

pickup

Objective

Lens

2-dimensional

parallel

drive

Laser

Type

GaAlAs

type

semiconductor

laser

Wave

Length

780nm

SIGNAL

FORMAT

Sampling

Frequency

44.1kHz

Quantization

Bit

16-bit

linear/

channel

Channel

Bit

Rate

4.3218Mb/sec

Channel

Modulation

Code

EFM

(Eight

to

Fourteen

Modulation)

CIRC

(Cross

Interleave

Reed

Solomon

Code)

Error

Correction

GENERAL

Power

Requirements

120/230V

AC,

50-60Hz

(General

Export

Model)

120V

AC,

6OHz

(U.S.A./Canada

Model)

230V

AC,

50Hz

(Europe

Model)

240V

AC,

50Hz

(U.K./

Australia

Model)

Power

Consumption

22

watts

‘Dimensions

(W

x

H

x

D)

442

x

149

x

331mm

(17-3/8"

x

5-7/8"

x

13-1/16"

)

Weight

(net)

10.0kg

(22-1/16

Ibs)

Standard

Accessories

Wireless

Remote

Control

Unit

(RC-

481),

RCA

pin-plug

cord,

Battery

(SUM-3,

“AA’,

”"R6”

type)

x

2,

Lock

Plate

@improvements

may

result

in

specification

or

feature

changes

without

notice.

D/A

DYIN-F—

Ey

hKARU-L

FVIND

4

NI

BSHEA-N-HUYTPUYS

ey

kKFYINWI

ANI

FHOAI

4

II

BRNI-ID-AD

4

II

(Ex

IPT)

AH

SLY

ABH

KHARSE-L

WML

YARHAN

2

RIFT

UR

ate

LD

——

BR

780nm

25

94—Vy

b)

BAL

ARR

44.1kHz

BTiteEy

bk

Ey

h-ULP/F

VAIL

wEL—b

4.3218Mb/

sec

BAX

EFM

IS—-TEAX

CIRC

(fd)

Big

100V

AC

50-60Hz

BREN

18W

NRE

Tie

442

x

149

x

331mm

(W

xX

H

x

D)

28

10kg

aa

@I{VLAVEIY

RC-481

ervaIs7I—-F

@

8

Bit

(#3,

SUM-3)

x

2

@

RRA

*

HRS

KOMI,

CEOKD

PH

BETS

CEMB”VET

©

VRDS-10

3

CASE

AND

FRONT

PANEL

REMOVAL

a

Ge

OT

LA

e

in

numbe

mbl

BSMICHLT

<A

Disasse

VRDS-10

4

ADJUSTMENT

AND

CHECKS

a

ce

1.

Replacement

of

the

pickup

assembly

@

Before

removing

the

pickup

assembly

be

sure

to

solder

-bridge

where

indicated

in

the

inset

(Fig.

4-1)

to

prevent

the

laser

diode

from

being

electrostatically

damaged.

After

replacing

the

pickup

assembly,

be

sure

to

unsolder

the

antistatic

bridge.

Or

else

the

laser

diode

does

not

function.

@

Before

servicing

the

pickup

assembly

be

sure

to

prevent

electrostatic-inducer

destruction

by

grounding

not

only

test

equipment

in

use

but

also

yourself

as

shown

in

Fig.

4-2.

*

Electrostatic

charge

drastically

shortens

the

operating

life

of

the

laser

diode

or

possibly

results

in

its

destruction.

@During

the

transportation,

mounting

and

dismounting

of

the

assembly,

support

with

your

fingers

at

points

A

and

B

as

shown

in

Fig.

4-3.

Be

particularly

careful

not

to

touch

the

actuator,

photosensor

and

LD

plate

and

do

not

apply

force

to

them.

@Don’t

touch

the

plated

portion

of

the

flat

cable

end

directly

with

fingers.

@Use

care

not

to

break

the

flat

cable.

@Soldering

must

be

done

quickly

at

less

than

30W,

320°C.

@Don’t

disassemble

the

pickup

ass’y.

@Don’t

apply

shock

to

the

pickup

ass’y.

@Don’t

place

the

assembly

in

a

place

subject

to

excessive

dust,

heat

or

moisture.

Earth

ring

(Lead

wire)

Pick-up

case

Chassis

(GNO)

2.

Objective

@Laser

beams

are

similar

to

infrared

rays.

Don’t

look

at

the

beams

directly

and

keep

your

eyes

at

least

30cm

away

from

them.

@Don’t

touch

the

objective

with

fingers.

@If

objective

becomes

dirty,

playback

will

deteriorate.

To

clean

the

objective,

moisten

a

good

cleaning

tissue,

such

as

made

by

KODAK,

in

isopropyl

alcohol

and

wipe

the

objective

gently.

Wipe

off

and

excess

fluid

with

a

dry

cleaning

tissue.

Earth

Fig.

4-2

1.Ey97

17

ASSY

OR

OLY

ITY

TASSY

EATERS,

V-F-

PA

A

FORE

PBB

ILO

TD,

UT

RRS

(Fig.

4-l

HBT

LUT

DOMEELTCR

EW, Eh.

MOU

ZB

SRO

Mth

BicbAT)

y

VEALTCOR

SAU.

MATYU

y

VELEKECAU-F-P

1A

FUBLER

Ao

Oy

ITY

TASSY

EMYRIBS,

WERE

ECHR

F-REMSEHI,

AKT

-

REAR,

BEBE

TOE

LUC

HAW,

(Fig.

4-2)

KLD-P-YHA-K,

BBROMDS

EARS

CEP

LED,

EMBL

ETOCHIERL

TC

KR

Sb

OMA,

MOAL,

HE

BVO,

Fig.

4-30AME

BR

CHETCHEU,

M7

IF

aL—-9—-,

KRM.

LDF

D—behlt,

FERNY

NLMAKLY

LIVE

KAU

OFS

YLT

HT

WVIO

A

y

FATS

BS

SANIT

OT

4

TEAWS

OI

Sy

ETAT

MENS

UO

CIHERE

LTHERLT

6

PERV

@

HAF

lS30W,

320°CU

FAA

L,

IEP

<

MEL

TK

ES

Wo

OLY

ITY

TASSY

AAKOBES

KUGABRTE

EIE

LEVEE

Sry

OLY

IT

yT

ASSY

BF

+

SBMA

TSK

HES

0

Ol

KIVGLORET

SM.

Bi

SEOMM

LH

T

KHER

Resistor

IMQ

~

10M2

LD

Plate

Photosensor

Fig.

4-3

2.999

yYZAILCDWT

OL

—¥-KALAAROKARUARTH.

HOKEOR,

E

EV

Y

ADS

20cm

WEBEL

TK

KEL,

@UVVACSFEMNEOE

CR

SW.

@VYAKBNA

<

CBAEREAAUEFLETOC

ROLDE

UTC

RS.

VY

RI

Y-a

VIR

(KODAKHBEE)

EL

TV

7O

C—WVFIVA—IW

(LP.A)

HIB

UCHR

L.

BAR

OME

SIMPFRE

Lo

TCHS

:

:

a

;

2

i

VRDS-10

3.

Laser

diode

check

(lop

(intensity

Optimum)

check]

Connect

a

DC

voltmeter

to

both

ends

of

R407

on

SERVO

PCB.

Measure

the

DC

voltage

while

playing

a

disc

to

check

that

the

measured

value

does

not

exceed

the

Iop

value

indicated

on

the

pickup

by

10mA.

(1=measured

value/22)

If

the

measured

value

is

higher

than

that

indicated,

the

pickup

may

be

damaged.

*

Pay

special

attention

that

parts

are

not

damaged

by

static

electricity.

@How

to

read

numbers

on

sticker

attached

to

the

pickup

(Example)

KSS-151A

11191

646

Serial

No.

lop

value

64.6mA

DC

voltmeter

3.

b--F44A-—FOURF

cv

7

(lop

(Intensity

Optimum)

(BFEE2)

(Py

FT

y

SRR

LDSTRITOC

&)

DC

#2

-F¥—-*#SERVO

PCBO

R407

OMIT

S.

PLAY

PORRBELHELL

TOBED

CBRRBBUKME

(1

=$BE/

22)

KREv

APT

vy

ASKRARETHS

lop

Bs

Y

TOMALLEBMLTORUC

ELHBT

A,

HMOWA,

DE

UTS

AREER

HS

*

BPR

WURICTOHERT

SIL.

OVI

yTRAY

—ORAA

(Bil)

KSS-151A

11191

646

YUP

IVNo.

lop

i

64.6mA

SERVO

PCB

4.

Anti-shock

bracket

To

protect

the

laser

pickup

mechanism

from

shocks

and

movement

during

transit,

it

is

secured

by

a

special

anti

-shock

bracket.

Before

starting

operation,

be

sure

to

release

this

bracket,

which

is

accessed

from

the

bottom.

Fig.

4-4

4.

PAtRPARB

Ic

DT

AB

ILMERORDD

DS

Ev

IT

SEFSRO,

iki

CH

ELCHVET.

AREOES

HU

SBA,

HTVRRASR

LTC

KRSU.

|

VRDS-10

4-1

SERVO

ADJUSTMENT

4-1

+-—hKiGE

TEST

DISC:

YEDS-18

or

MCD-111

(Except

4-1-6

and

FARFIAD:

YEDS-18£€EIZMCD-111

(4-1-668kU

4-1-7)

4-1-7TERS)

at

404

R407

V405

F.GAIN

oa

V401

6

ita

SERVO

PCB

Fig.

4-6

VOLTAGE

CONVERSION

(For

general

export

models)

Be

sure

to

remove

the

power

cord

from

the

AC

outlet

before

repositioning

the

voltage

converter

switch.

1.

Locate

the

voltage

selector

on

the

rear

panel.

—

SCLECTOR

2.

Using

a

flat-bladed

screwdriver,

set

to

the

appropriate

230

V

or

120

V

position

according

to

your

area.

230V

G4

120V

VRDS-10

|

4-1-1

Checking

the

pickup

actuator

operation

Before

loading

the

disc,

turn

the

power

ON

and

check

that

the

pickup

actuator

moves

up

and

down

three

times.

(If

the

pickup

is

not

at

inside

on

the

disc,

perform

the

above

operation

after

moving

the

pickup

to

the

inside.)

4-1-2

Sled

balance

adjustment

1.

Adjust

V405(S.BAL)

for

OV

potential

between

TP4

pin

1

and

TP4

pin

2(GND).

4-1-3

Tracking

balance

adjustment

1.

Connect

the

oscilloscope

between

TP1

pin

4(TE1)

and

TP1

pin

6(GND),

and

press

the

SEARCH

(<<or

PP

)

button.

2.

Adjust

V401(T.BAL)

so

that

the

upper

and

lower

amplitudes

of

the

tracking

error

signal

waveform

become

equal

above

and

below

OV.

4-1-4

Focus

balance

adjustment

1.

Connect

the

oscilloscope

between

TP1

pin

5(RF)

and

TP1

pin

6(GND).

2.

In

the

play

mode,

and

adjust

V402(F.BAL)

so

that

the

waveform

on

the

oscilloscope

becomes

maximum.

41-1

E

IF

vA

TOF

2

LFF

ty

7

BRONBEy

779

ATIF

aL-F-M3IBELFHT

4c.

(Cy

AP

vy

PRBARIBOE

SI.

RAMI

BHR

LICE

Biko)

FA

AT

VURBLEW.

41-2

2by

KNSY

RAE

1.

TPADIBEY

SE

TPAD2BE

Y

(GND)

HOBWMEAOV

ic

WAKA

V405

(S.BAL)

FHT

4.

A1-3ShSyY

FYING

VRE

1.

TPID4BEY

(TE)

E

TPIMDSGBEY

(GND)

Micra

AI—-TeEREL.

SEARCH

RY

(dd

EK

LPP)

ET,

2

bG

yt

VILLI

-fES

ORD

OV

EBINCHRNS

&

5

V401

(T.BAL)

&

HS

4.

AAA

D+

-HANDVARBE

1.

TPIOSHYY

(RFE

TPIODSBEY

(GND)

ict

va

|

AI-TSEBRT

S.

2.

PLAYIRME

CA

YO

AI-TFOREMARAI

SEI

V402

(F.BAL)

+39

4.

4-1-5

Focus

offset

check

1.

After

adjusting

the

focus

balance,

stop

the

player.

Check

for

an

offset

voltage

of

50mV

or

less

at

TP3.

If

reading

values

are

out

of

spec,

adjust

V402

(F.BAL)

again.

Fig.

4-8

41-574

-AAZAICy

heER

lL.

DHA

-HANDY

ABBERSTOPIREC

LUT

TP3OA7¢Yb

BEM

SOmMVIAF

CHS

EL

LHRT

A,

b

LABIA

STOMA

BE

V402

(F.BAL)

FBT

Se

4-1-6

Focus

gain

adjustment

(Use

YEDS-

18)

1.

Apply

1.16kHz/3.5Vp-p

to

TP1

pin

1(FE2)

from

an

external

OSC

via

100k

Q

resistor.

2.

Adjust

V404(F.GAIN)

so

that

phase

at

TP1

pin

2

(FE1)

is

90°

with

respect

to

that

of

the

external

OSC

during

playback.

Oscillator

Oscilloscope

|

VRDS-10

4-1-6

74—-AATA

VIB

(YEDS-

1818)

1.

ASBOSC

&

Y

100k

Q

OLA

LT

1.16kKHz/3.5Vp-p

©

EEA

TPIOLREY(FEZIADTS.

2.

SUAIRAES

TPIT

©

2B

(FEL)

&EH@BOSC

EC

OHTA

90°

te

ZKID

It

V404

(F.GAIN)

HBTS.

SERVO

PCB

1.16kHz/3.5V

p-p

4-1-7

Tracking

gain

adjustment

(Use

YEDS-

18)

1.

Apply

1.7kHz/4Vp-p

to

TP1

pin

3(TE2)

from

an

external

OSC

via

100k

resistor.

2.

Adjust

V403(T.GAIN)

so

that

phase

at

TP1

pin

4

(TE1)

is

90°

with

respect

to

that

of

the

external

OSC

during

playback.

Oscillator

1.70kHz/4V

p-p

Oscilloscope

Fig.

4-9

4-1-7

Koy

Ft

UTT4A

VRB

(YEDS-

1816)

1.

ABBOSC

£9

100k

Q

OHH

LT

1.70kHz/4Vp-p

Of

BX

TPID3SHEY

(TEZICANTS.

2.7

UF

IRRES

TP1

©

4B

Y

(TET)

EAB

OSC

&

OHLAOS

90°

izttZk

51

V403

(T.GAIN)

FHT

5.

SERVO

PCB

Fig.

4-10

VRDS-10

|

4-2

AUDIO

ADJUSTMENT

4-747

.

Output

level

HALAL

.

Channel

level

difference

F

4

VRIVDLAIVE

ake

DISC:

YEDS-18

(MCD-111)

TRACK

No.

577

FREQUENCY

282%

SPECIFICATIONS

me

2.2

+

0.3Vrms

REMARKS

1)

1.0dB

or

less

—

——_+—_—_

.

DC

offset

adjustment

DC

ADZy

bE

Adjust

V151(Lch),

V251

(Rch)

on

AUDIO

PCB

so

that

the

offset

voltage

becomes

OmV.

ADewy

bBEMOMVIc

B&D

AUDIO

PCBO

V151

(Leh),

V251

(Reh)

HHS

So

.

Harmonic

distortion

Saas

.

Frequency

response

Byeestoacd

.

S/N

ratio

SANE

20Hz~20kHz

=

0.004

%

or

less

Within

+

1.0dB

100dB

or

better

A00Hz

HPF

in

20kHz

LPF

in

reference

level:

1kHz

DIN

AUDIO

(Use

SHIBASOKU

725

or

equivalent)

.

Channel

separation

Fv

VAIL

GINY-Yayv

95dB

.or

better

DIN

AUDIO

.

Emphasis

effect

LUI

rp

yVAMR

AUDIO

PCB

~

9.0

=

1.0dB

(YEDS-18)

—

20

+

1.0dB

(MCD-111)

reference

level:

1kHz

Fig.

4-11