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TEAC,

Gio

oc

Jo,

SERVICE

MANUAL

VRDS-7

Compact

Disc

Player

COMPACT

aise

DIGITAL

AUDIO

Effective

:

June,

1993

5704065200

VRDS-7

|

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

!aser

radiation

emitted

inside

of

this

product

is

completely

confined

in

the

protective

housings.

The

label

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

jet

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.

e

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

OHHS

RULES

21

CFA

SUBCHAPTER

J

APPLI-

CABLE

AT

DATE

OF

MANUFACTURE

TEAC,

CORPORATION

2)

3NAKA-CHO

WUSASHOND

SH

TORO

JAPAN

MANUFACTURED

1

e

CAUTION

¢

ACHTUNG

Optical

pickup:

Type

:

KSS-240A

Manufacturer

:

SONY

Corporation

Laser

output

:

Less

than

0.2

mW

on

the

objective

lens

Wavelength

:760

—

800

nm

eOBSERVERA

¢

ADVARSEL

WAASOLE

LASER

RADIATION

WHEN

OPEN

AND

INTERLOCAS

DEFEATED

MOK

EXPOSUME

TO

BEAM

iM

STRAM,

AUSSETZEN”

QING

LASERSTEAL

WG

WAR

DENA

OE

STMUEN

AR

TAG

+

USYNLIG

LASERSTRALING

VEO

ABMING

WW

‘SMKERHEDSAFBRYDERE

EA

LOE

AF

Fotos

UNOGA

LOSATTELSE

FOR

STRALING

WAROMTLA!

SUDMAGTELOA

Mt

SAA

ASD.

LATE

SBNCIAA

HE

LTAA

MAK

YMATONT

Saale

VAAANLUCSIa

CASERSATER

ADVARSEL

-

USYNLIG

LASERBESTRAL

FA

OENNE

DELEN

ER

APE

OG

SRKE

RPE

TSSPERREN

ER

UTKOBLET

UNNGA

UTSETTELSE

FOR

STAALING

CLASS

1

LASER

PRODUCT

LUOKAN

1

LASERLAITE

KLASS

1

LASERAPPARAT

@

THIS

LABEL

IS

ATTACHED

TO

THE

PLACE

AS

ILLUSTRATED

TO

INFORM

THAT

THE

APPARATUS

CONTAINS

A

LASER

COMPONENT.

(@

DIESE

AUFKLEBEMARKE

IST

AN

DEM

IN

DER

ABBILDUNG

GEZEIGTEN

ORT

ANGEBRACHT

UM

DARAUF

HINZUWEISEN,

DASS

IM

INNERN

DES

GERATS

EINE

LASER-KOMPONENTE

BEFINDET.

@

PASKRIFTEN

SITTER

PA

APPARATEN

SOM

VISAS

SOM

UPPMANING

OM

ATT

APPARATEN

OMFATTAR

EN

INBYGGD

LASERKOMPONENT.

(D

DETTE

MERKAT

ER

ANBRAGT

SOM

VIST

|

ILLUSTRATIONEN

FOR

AT

ADVARE

BRUGEREN

OM

AT

APPARATET

INDEHOLDER

EN

LASERKOMPONENT.

@

DETTE

MARKAT

ER

SOM

VIST

PA

ILLUSTRATIONEN

ANBRAGT

PA

INDERSIDEN

AF

TOPDAKSLET

FOR

AT

ADVARE

BRUGEREN

OM

AT

YDERLIGERE

FREMTRANGEN

VIL

VERE

FORBUNDET

MED

FARE

FOR

AT

UDSAETTE

SIG

FOR

LASERSTRALING.

ADVARSEL-

BETJENING

AF

ANDRE

KONTROLLER

OG

REGULATORER

ELLER

BENYTTELSE

AF

ANDRE

FREMGANGSMADER

END

BESKREVET

HERI

ER

FORBUNDET

MED

FARE

FOR

USD/ETTELSE

FOR

LASERSTRALING.

VARNIG:

APPARATEN

INNEHALLER

LASER

KOMPONENT

MED

STRALNING

OVERSTIGANDE

KLASS

1

“ADVARSEL:

USYNLIG

LASERSTRALING

VED

ABNING

NAR

SIKKERHEDSAFBRYDERE

ER

UDE

AF

FUNKTION.

UNDGA

UDSAETTELSE

FOR

STRALING.”

“VAROITUS!

SUQJAKOTELOA

EI

SAA

AVATA,

LAITE

SISALTAA

LASERDIODIN.

JOKA

LAHETTAA

(NAKYMATONTA)

SILMILLE

VAARALLISTA

LASERSATEILYA’.

ADVARSEL:

USYNLIG

LASERBESTRALING

NAR

DENNE

DELEN

ER

APEN

OG

SIKKERHETSSPERREN

ER

UTKOBLET

UNNGA

UTSETTELSE

FOR

STRALING.

|

VRDS-7

2

SPECIFICATIONS

tt

tk

AUDIO

Number

of

Channels

2

Frequency

Response

1

—

20,000Hz

+

0.3dB

Signal

to

Noise

Ratio

Better

than

110dB

(1kHz)

Dynamic

Range

Better

than

99dB

(1kHz)

Harmonic

Distortion

0.0015%

(1kHz)

Wow

and

Flutter

Unmeasurable

(Quartz

accuracy)

Channel

Separation

Better

than

110dB

(1kHz)

Output

Analog

2.2Vrms

Digital

0.5Vp-p/75Q

(Coaxial)

-

15dBm

--21dBm

(Optical)

D/A

Converter

Bitstream

Conversion

Digital

Filter

8-times

oversampling

20-bit

digital

filter

Analog

Filter

3rd

order

Butterworth

filter

PICK

UP

Type

Optical

3-Beam

laser

pickup

2-dimensional

parallel

drive

GaAlAs

type

semiconductor

laser

780nm

Objective

Lens

Laser

Type

Wave

Length

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

(U.S.A./

Canada/General

Export

Model)

230V

AC,

50Hz

(Europe

Model)

240V

AC,

50Hz

(U.K.

Model)

PowerConsumption

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)

Qkg

(19-13/16

Ibs)

Standard

Accessories

Wireless

Remote

Control

Unit

RC-

481

(VRDS-

7N)

RC-

495

(VRDS-

7B)

Pin

Plug

Cord

Battery

(SUM-3,

“AA”,

“R6”

type)

x2

@

Improvements

may

result

in

specification

or

feature

changes

without

notice.

(A-—F

47)

A-—FatFveVURANBR

2FeURID

BRR

1~20,000Hz

+

0.3dB

SN

EE

110dBuLA

bt

(EIAJ)

FAS

9IVYY

99dB

AF

(EIAJ)

mARER

0.0015%LIF

CEIAJ)

DIDI

ATE

PR

ABLE

OK

gest

ieth

)

FervRILENLY-Ysy

110dBLIE

(EIAJ)

FFOTRA

2.2Vrms

FIUINEA

0.5Vp-p/75

Q

(COAXIAL)

—

15~-21dBm

(OPTICAL)

D/JATYIN-¥~

Ey

hARU-L

FIUINDIANI—

BEA

-N-PUFUYT

20Eyv

hk

FUND

4a

FHFOFI4NI—

BRNI-D-RAID4WI-

(Evy

IP

ut)

Ax

WHOL

YA,

HERBE-L

ML

YARHAX

2

RET

RH

bier

aL

—

Hf

RE

780nm

(25

74—Vy

bh)

BALA

44.1kHz

BHiteEy

b&

BE

h

UT

P/F

eR

tiEL—Fb

4.321

8Mb/sec

BRAK

EFM

LO-MEAX

CIRC

(—A)

ER

100V

AC

50-60Hz

AREA

18W

ET

HK

442

x

149

x

331mm(W

XH

xD)

=e

Okg

Aaa

@7D4VLAVEIY

RC-481

(VRDS-7N)

RC-

495

(VRDS-

7B)

@

Fe

Bik

(B3,

SUM-3)

x

2

@

RRA

*

{LER

LOM.

BOLD

ES,

RESTS

CEMBVESF,

VRDS-7

3

CASE

AND

FRONT

PANEL

REMOVAL

Sse

RB

te

OF

LG

:

mobl

number-o

BSMBCAL

TC

EAM

Disassemble

in

|

VRDS-7

4

ADJUSTMENT

AND

CHECKS

aa

&

HEE

1.

Handling

the

pickup

assembly

@

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.

4-1.

*

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.

4-2.

Be

particularly

careful

not

to

touch

the

actuator,

photosensor

and

LD

plate

and

do

not

apply

force

to

them.

@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

(GND)

Resistor

IMQ~10MQ

Earth

Fig.

4-1

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.

@lIf

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.

VOLTAGE

CONVERSION

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.

2.

Using

a

flat-bladed

screwdriver,

set

to

the

appropriate

230

V

or

120

V

position

according

to

your

area.

1.b

97

17

ASSY

ORR

@LvITyYTASSY

EMRYRIWBS

I,

MAB

CIHR

F-AEMA

LH

MAT

-AETICU,

BEDE

TOIE

LTC

HRW,

(Fig.

4-1)

KLD-¥-PAA—

KA,

BBA

dS

LAPS

CRF

LEY,

EKMGBLETOCLERL

TCR

SU)

@MOHIT,

MOAL,

HbEBUORIA,

Fig.

4-2OABE

BM

CHATCHASU,

BK77Fazt—9—,.

HRB,

LDF

VD—

haps,

FANE

YO

ASMA

LEWEC

KS,

OV

IT

yTASSY

KKAKORBE

LUA

ELIE

CR

AW

@EY

IT

YT

ASSY

IR

¢

HBIUMABDOS

RAV

@tl

-

hIVKEORET

ABM,

Bh

SHROBMLRUT

C

TERU,

2.

xD

YAILIWT

OL

—¥—-HSEFAROABRMIAHTT.

BHOREDA,

FB

RLY

ADS

30cm

LEBEL

TC

HSU

@V

YALE

EARNEST

CRS

@VVArBNA

<.

EREREAAMERFLETOC,

ROK

fate

OTC

KAU

VY

RAY

Hav

IR—7S—

(KODAK

HBS

HY)

I.

PFO

E—WFVaA—W

(LP.A)

SRL

THRE

LA

ROR

OL

SICMTRSE

DTN

SY

VOLTAGE

SELECTOR

120V

230V

oJ

VRDS-7

4-1

SERVO

ADJUSTMENT

TEST

DISC:

YEDS-18

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

six

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

Focus

gain

adjustment

1.

Apply

1.16kHz/3.5Vp-p

to

TP1

pin

1(FE2)

from

an

external

OSC

via

100k

Q

resistor.

2.

Adjust

V402(F.GAIN)

so

that

phase

at

TP1

pin

2

(FE1)

is

90°

with

respect

to

that

of

the

external

OSC

during

playback.

Oscillator

Oscilloscope

1.16kH2/3.5Vp-p

4-1

+—KIgE

FAkF+AZ:

YEDS-18

tT

Ey

IF

VAST

IVF

aL—H—HEF

CD

BRON

Cy

77ST

I

FaL—¥—-MOEF

1

ATKLA

BAPARSId

315)

LPT

SCE.

(Ey

7

Py

TRRAM

ICE

Bld,

RAAB

Lac

ET

So

bo)

74

AT

WRAL,

4-1-2

74

—-HAAZTA

VBS

1.

ABBOSC

&

O

100k

Q

OFHLEH

LT

1.16kHz/3.5Vp-po

S52

TPIOVBEY

(FEZ)

IAT

S,

2SUTIRREC

TPL

O

2H

Y

(FEL)

E28

OSC

&

OTA

90°

izH#

Ak

Iz

V402

(F.GAIN)

HHT

SZ.

SERVO

PCB

Fig.

4-3

4-1-3

Tracking

gain

adjustment

1.

Apply

1.7kHz/4Vp-p

to

TP1

pin

3(TE2)

from

an

external

OSC

via

100k

2

resistor.

2.

Adjust

V401(T.GAIN)

so

that

phase

at

TP1

pin

4

(TE1)

is

90°

with

respect

to

that

of

the

external

OSC

during

playback.

Oscillator

Oscilloscope

1,70kH2/4Vp-p

Fig.

4-4

ANS

bh

Sy

FITS

VRB

1,

ABBROSC.4

9

100k

Q

OUP

EH

LT

1.70kHz/

4Vp-p

018

SX

TPIOSBEY(TEZ)

ANTS.

2PUTIRHEC

TIO

4

E

Y(TE1)

CX8B

OSC

EL

OHA

90°

izt#

B&F

V401

(T.GAIN)

HST

4,

SERVO

PCB

4-2

AUDIO

ADJUSTMENT

4-747

DISC:

YEDS-18

(MCD-111)

TRACK

No.

547

|

FREQUENCY

Bikek

—_

.

Output

level

HALAL

.

Channel

level

difference

F

9

VRIVLNIVE

VRDS-7

_

aa

REMARKS

ia

=

load

impedance

:

BIT

VYE-SVYA:

50k

Q

SPECIFICATIONS

m

2.1

+

0.3Vrms

1.0dB

or

less

.

DC

offset

adjustment

DCAD»

bP

Adjust

V151(Lch),

V251

(Reh)

on

AUDIO

PCB

so

that

the

offset

voltage

becomes

OmV.

Tsk

ec

FTE

y

RMEDNOMV

Ic

%SBKSB

AUDIO

PCBO

V151(Leh),

V251

(Reh)

eT

3.

.

Harmonic

distortion

BARES

.

Frequency

response

FRSA

E

0.004%

or

less

a

es

Hh

20Hz~20kHz

Within

+

1.0dB

reference

level:

1kHz

.

S/N

ratio

S/NEE

.

Channel

separation

Fe

VAIL

BNL-—Yay

DIN

AUDIO

(Use

SHIBASOKU

725

or

equivalent)

100dB

or

better

95dB

or

better

DIN

AUDIO

.

Emphasis

effect

LVI

r

YADR

AUDIO

PCB

Fig.

4-5

Adjustment

locations

-—

9.0

+

1.0dB

(YEDS-18)

—~

20

+

1.0dB

(MCD-111)

reference

level:

1kHz

(3)

DC

voltmeter

(1,2,5,6,7,8)

AC

voltmeter

(4)

Distorion

Analyzer

Fig.

4-6

Test

setup

i

|

3

3

}

E

E

VRDS-7

|

5

IC

BLOCK

DIAGRAMS

ICFOyISA

PIS

L

U121

SM5840AP

U151,

251

SAA7350AGP

VDDATR

&

8

>

>

C=)

SWITCHED

CAPACITOR

NETWORK

FBR-

FILTER

CALCULATION

&

ATTENUATION

CALCULATING

E

@3)

INTR-

3

(8)

VSSAT

5

(30)

IRR

5)

:

FBL+

G

S

E

INTL+

=

2

g

#

G5)

FBL-

~

INTL-

U403

CXD2500AQ

MUTE

PSSL

MNTO

MNT1

DIGITAL

PLL

EFM

ADDRESS

PRIORITY

bisa

AREER

MNT2

MNT3

RAOF

C2PO0

RFCK

GFS

SYNC

SERIAL/

PARALLEL

PROTECTOR

PROCESSOR

PLCK

UGFS

TIMING

GToP

4

GENERATOR

1

|

LRCK

ur

-

a

eck

——i———

mar

@)

@

DATA

PROCESSOR

SUBCODE

PROCESSOR

ERROR

CORRECTOR

BOUT

16-TIMES

OVERSAMPLING

FILTER

VRDS-7

U402

CXA1372S

INPUT

SHIFT

REGISTER

ADDRESS

DECODER

2L

DATA

REGISTER

4

w

Qa

ro)

o

w

a

E

TRACKING

PHASE

COMPENSATION

WINDOW

COMPARATOR

COMPENSATION

U410

LB1649

||

uaaria

Bud

|-—J

INPUT

LOGIC

HE

9

(o) fo)

a

FE

2

a

é

OUT3

n

Zz

Vee

VRDS-7

U491

uPD75212ACW

BASIC

INTERVAL

TIMER

TIMER

/EVENT

COUNTER

TIMER/PULSE

GENERATOR

SERIAL

INTERFASE

INTERRUPT

CONTROL

10

GENERAL

REGISTER

ROM

PROGRAM

MEMORY

12160

x8

BITS

DATA

MEMORY

512

x4

BITS

SYSTEM

CLOCK

WATCH

|

CLOCK

GENERATOR

STAND

BY

GRUICLOCK

ct

[Bie

(Pm

OC”

Mn

U501

uPD7566CS

P10/Cino

P1t/Cint

Ca]

PORTO

BUFFER

TIMER/

Test

“}

POWVREF

ie

CONTROL

<0

P12/Cin2

Pt3/CIN3

7

P80

PROGRAM

COUNTER

PORT

8

LATCH

BUFFER

GENERAL

REGISTER

PROGRAM

INSTRUCTION

DECODER

DATA

MEMORY

Clock

STANDBY.

64x

4

BITS

GENERATOR

|

CONTROL

PORT

11

fg

P11

2

BUFFER

-—]

—

FIP

CONTROLLER

DRIVER