Teac VRDS-7 Manuel utilisateur

TEAC,

Gio

Jo,

SERVICE

MANUAL

VRDS-7

Compact

Disc

Player

COMPACT

aise

DIGITAL

AUDIO

Effective

June,

1993

5704065200

VRDS-7

SAFETY

INFORMATION

SAFETY

INFORMATION

This

product

has

been

designed

and

manufactured

according

FDA

regulations

“title

21,

CFR,

chapter

subchapter

based

the

Radiation

Control

for

Health

and

Safety

Act

1968”,

and

classified

class

laser

product.

There

not

hazardous

invisible

laser

radiation

during

operation

because

invisible

!aser

radiation

emitted

inside

this

product

completely

confined

the

protective

housings.

The

label

required

this

regulation

Shown

(1)

CAUTION

you

remove

the

above-mentioned

housings

under

the

operating

state

the

product,

there

possibility

human

access

the

invisible

laser

radiation

emitted

from

the

optical

pickup.

Pay

careful

attention,

not

jet

the

invisible

laser

beam

enter

into

your

eyes.

you

find

troubled

state

the

laser

diode,

change

the

specified

new

optical

pickup.

you

find

troubled

state

safety

interlock

parts,

change

the

same

type

parts

described

parts

list.

CERTIFICATION

THIS

PRODUCT

COMPLIES

WITH

OHHS

RULES

CFA

SUBCHAPTER

APPLI-

CABLE

DATE

MANUFACTURE

TEAC,

CORPORATION

3NAKA-CHO

WUSASHOND

TORO

JAPAN

MANUFACTURED

CAUTION

ACHTUNG

Optical

pickup:

Type

KSS-240A

Manufacturer

SONY

Corporation

Laser

output

Less

than

0.2

the

objective

lens

Wavelength

:760

—

800

eOBSERVERA

ADVARSEL

WAASOLE

LASER

RADIATION

WHEN

OPEN

AND

INTERLOCAS

DEFEATED

MOK

EXPOSUME

BEAM

STRAM,

AUSSETZEN”

QING

LASERSTEAL

WAR

DENA

STMUEN

TAG

USYNLIG

LASERSTRALING

VEO

ABMING

‘SMKERHEDSAFBRYDERE

LOE

Fotos

UNOGA

LOSATTELSE

FOR

STRALING

WAROMTLA!

SUDMAGTELOA

SAA

ASD.

LATE

SBNCIAA

LTAA

MAK

YMATONT

Saale

VAAANLUCSIa

CASERSATER

ADVARSEL

USYNLIG

LASERBESTRAL

OENNE

APE

SRKE

RPE

TSSPERREN

UTKOBLET

UNNGA

UTSETTELSE

FOR

STAALING

CLASS

LASER

PRODUCT

LUOKAN

LASERLAITE

KLASS

LASERAPPARAT

THIS

LABEL

ATTACHED

THE

PLACE

ILLUSTRATED

INFORM

THAT

THE

APPARATUS

CONTAINS

LASER

COMPONENT.

DIESE

AUFKLEBEMARKE

IST

DEM

DER

ABBILDUNG

GEZEIGTEN

ORT

ANGEBRACHT

DARAUF

HINZUWEISEN,

DASS

INNERN

DES

GERATS

EINE

LASER-KOMPONENTE

BEFINDET.

PASKRIFTEN

SITTER

APPARATEN

SOM

VISAS

SOM

UPPMANING

ATT

APPARATEN

OMFATTAR

INBYGGD

LASERKOMPONENT.

DETTE

MERKAT

ANBRAGT

SOM

VIST

ILLUSTRATIONEN

FOR

ADVARE

BRUGEREN

APPARATET

INDEHOLDER

LASERKOMPONENT.

DETTE

MARKAT

SOM

VIST

ILLUSTRATIONEN

ANBRAGT

INDERSIDEN

TOPDAKSLET

FOR

ADVARE

BRUGEREN

YDERLIGERE

FREMTRANGEN

VIL

VERE

FORBUNDET

MED

FARE

FOR

UDSAETTE

SIG

FOR

LASERSTRALING.

ADVARSEL-

BETJENING

ANDRE

KONTROLLER

REGULATORER

ELLER

BENYTTELSE

ANDRE

FREMGANGSMADER

END

BESKREVET

HERI

FORBUNDET

MED

FARE

FOR

USD/ETTELSE

FOR

LASERSTRALING.

VARNIG:

APPARATEN

INNEHALLER

LASER

KOMPONENT

MED

STRALNING

OVERSTIGANDE

KLASS

“ADVARSEL:

USYNLIG

LASERSTRALING

VED

ABNING

NAR

SIKKERHEDSAFBRYDERE

UDE

FUNKTION.

UNDGA

UDSAETTELSE

FOR

STRALING.”

“VAROITUS!

SUQJAKOTELOA

SAA

AVATA,

LAITE

SISALTAA

LASERDIODIN.

JOKA

LAHETTAA

(NAKYMATONTA)

SILMILLE

VAARALLISTA

LASERSATEILYA’.

ADVARSEL:

USYNLIG

LASERBESTRALING

NAR

DENNE

APEN

SIKKERHETSSPERREN

UTKOBLET

UNNGA

UTSETTELSE

FOR

STRALING.

VRDS-7

SPECIFICATIONS

AUDIO

Number

Channels

Frequency

Response

—

20,000Hz

0.3dB

Signal

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

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

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

watts

Dimensions

442

149

331mm

(17-3/8"

5-7/8"

13-1/16"

)

Weight

(net)

Qkg

(19-13/16

Ibs)

Standard

Accessories

Wireless

Remote

Control

Unit

RC-

481

(VRDS-

7N)

RC-

495

(VRDS-

7B)

Plug

Cord

Battery

(SUM-3,

“AA”,

“R6”

type)

Improvements

may

result

specification

feature

changes

without

notice.

(A-—F

47)

A-—FatFveVURANBR

2FeURID

BRR

1~20,000Hz

0.3dB

110dBuLA

(EIAJ)

FAS

9IVYY

99dB

(EIAJ)

mARER

0.0015%LIF

CEIAJ)

DIDI

ATE

ABLE

gest

ieth

)

FervRILENLY-Ysy

110dBLIE

(EIAJ)

FFOTRA

2.2Vrms

FIUINEA

0.5Vp-p/75

(COAXIAL)

—

15~-21dBm

(OPTICAL)

D/JATYIN-¥~

hARU-L

FIUINDIANI—

BEA

-N-PUFUYT

20Eyv

FUND

FHFOFI4NI—

BRNI-D-RAID4WI-

(Evy

ut)

WHOL

YA,

HERBE-L

YARHAX

RET

bier

—

780nm

(25

74—Vy

bh)

BALA

44.1kHz

BHiteEy

P/F

tiEL—Fb

4.321

8Mb/sec

BRAK

EFM

LO-MEAX

CIRC

(—A)

100V

50-60Hz

AREA

18W

442

149

331mm(W

xD)

Okg

Aaa

@7D4VLAVEIY

RC-481

(VRDS-7N)

RC-

495

(VRDS-

7B)

Bik

(B3,

SUM-3)

RRA

{LER

LOM.

BOLD

ES,

RESTS

CEMBVESF,

VRDS-7

CASE

AND

FRONT

PANEL

REMOVAL

Sse

mobl

number-o

BSMBCAL

EAM

Disassemble

VRDS-7

ADJUSTMENT

AND

CHECKS

HEE

Handling

the

pickup

assembly

Before

servicing

the

pickup

assembly

sure

prevent

electrostatic-inducer

destruction

grounding

not

only

test

equipment

use

but

also

yourself

shown

Fig.

4-1.

Electrostatic

charge

drastically

shortens

the

operating

life

the

laser

diode

possibly

results

its

destruction.

@During

the

transportation,

mounting

and

dismounting

the

assembly,

support

with

your

fingers

points

and

shown

Fig.

4-2.

particularly

careful

not

touch

the

actuator,

photosensor

and

plate

and

not

apply

force

them.

@Don't

disassemble

the

pickup

ass’y.

@Don’t

apply

shock

the

pickup

ass’y.

@Don't

place

the

assembly

place

subject

excessive

dust,

heat

moisture.

Earth

ring

(Lead

wire)

Pick-up

case

Chassis

(GND)

Resistor

IMQ~10MQ

Earth

Fig.

4-1

Objective

@laser

beams

are

similar

infrared

rays.

Don’t

look

the

beams

directly

and

keep

your

eyes

least

30cm

away

from

them.

@Don't

touch

the

objective

with

fingers.

@lIf

objective

becomes

dirty,

playback

will

deteriorate.

clean

the

objective,

moisten

good

cleaning

tissue,

such

made

KODAK,

isopropyl

alcohol

and

wipe

the

objective

gently.

Wipe

off

and

excess

fluid

with

dry

cleaning

tissue.

VOLTAGE

CONVERSION

sure

remove

the

power

cord

from

the

outlet

before

repositioning

the

voltage

converter

switch.

Locate

the

voltage

selector

the

rear

panel.

Using

flat-bladed

screwdriver,

set

the

appropriate

230

120

position

according

your

area.

1.b

ASSY

ORR

@LvITyYTASSY

EMRYRIWBS

MAB

CIHR

F-AEMA

MAT

-AETICU,

BEDE

TOIE

LTC

HRW,

(Fig.

4-1)

KLD-¥-PAA—

KA,

BBA

LAPS

CRF

LEY,

EKMGBLETOCLERL

TCR

SU)

@MOHIT,

MOAL,

HbEBUORIA,

Fig.

4-2OABE

CHATCHASU,

BK77Fazt—9—,.

HRB,

LDF

VD—

haps,

FANE

ASMA

LEWEC

KS,

yTASSY

KKAKORBE

LUA

ELIE

@EY

ASSY

HBIUMABDOS

RAV

@tl

hIVKEORET

ABM,

SHROBMLRUT

TERU,

YAILIWT

—¥—-HSEFAROABRMIAHTT.

BHOREDA,

RLY

ADS

30cm

LEBEL

HSU

YALE

EARNEST

CRS

@VVArBNA

EREREAAMERFLETOC,

ROK

fate

OTC

KAU

RAY

Hav

IR—7S—

(KODAK

HBS

HY)

PFO

E—WFVaA—W

(LP.A)

SRL

THRE

ROR

SICMTRSE

DTN

VOLTAGE

SELECTOR

120V

230V

VRDS-7

4-1

SERVO

ADJUSTMENT

TEST

DISC:

YEDS-18

4-1-1

Checking

the

pickup

actuator

operation

Before

the

disc,

turn

the

power

and

check

that

the

pickup

actuator

moves

and

down

six

times.

(If

the

pickup

not

inside

the

disc,

perform

the

above

operation

after

moving

the

pickup

the

inside.)

4-1-2

Focus

gain

adjustment

Apply

1.16kHz/3.5Vp-p

TP1

1(FE2)

from

external

OSC

via

100k

resistor.

Adjust

V402(F.GAIN)

that

phase

TP1

(FE1)

90°

with

respect

that

the

external

OSC

during

playback.

Oscillator

Oscilloscope

1.16kH2/3.5Vp-p

4-1

+—KIgE

FAkF+AZ:

YEDS-18

VAST

IVF

aL—H—HEF

BRON

77ST

FaL—¥—-MOEF

ATKLA

BAPARSId

315)

LPT

SCE.

(Ey

TRRAM

ICE

Bld,

RAAB

Lac

bo)

WRAL,

4-1-2

—-HAAZTA

VBS

ABBOSC

100k

OFHLEH

1.16kHz/3.5Vp-po

S52

TPIOVBEY

(FEZ)

IAT

2SUTIRREC

TPL

(FEL)

E28

OSC

OTA

90°

izH#

V402

(F.GAIN)

HHT

SZ.

SERVO

PCB

Fig.

4-3

4-1-3

Tracking

gain

adjustment

Apply

1.7kHz/4Vp-p

TP1

3(TE2)

from

external

OSC

via

100k

resistor.

Adjust

V401(T.GAIN)

that

phase

TP1

(TE1)

90°

with

respect

that

the

external

OSC

during

playback.

Oscillator

Oscilloscope

1,70kH2/4Vp-p

Fig.

4-4

ANS

FITS

VRB

ABBROSC.4

100k

OUP

1.70kHz/

4Vp-p

018

TPIOSBEY(TEZ)

ANTS.

2PUTIRHEC

TIO

Y(TE1)

CX8B

OSC

OHA

90°

izt#

B&F

V401

(T.GAIN)

HST

SERVO

PCB

4-2

AUDIO

ADJUSTMENT

4-747

DISC:

YEDS-18

(MCD-111)

TRACK

No.

547

FREQUENCY

Bikek

—_

Output

level

HALAL

Channel

level

difference

VRIVLNIVE

VRDS-7

REMARKS

load

impedance

BIT

VYE-SVYA:

50k

SPECIFICATIONS

2.1

0.3Vrms

1.0dB

less

offset

adjustment

DCAD»

Adjust

V151(Lch),

V251

(Reh)

AUDIO

PCB

that

the

offset

voltage

becomes

OmV.

Tsk

FTE

RMEDNOMV

%SBKSB

AUDIO

PCBO

V151(Leh),

V251

(Reh)

Harmonic

distortion

BARES

Frequency

response

FRSA

0.004%

less

20Hz~20kHz

Within

1.0dB

reference

level:

1kHz

S/N

ratio

S/NEE

Channel

separation

VAIL

BNL-—Yay

DIN

AUDIO

(Use

SHIBASOKU

725

equivalent)

100dB

better

95dB

better

DIN

AUDIO

Emphasis

effect

LVI

YADR

AUDIO

PCB

Fig.

4-5

Adjustment

locations

-—

9.0

1.0dB

(YEDS-18)

—~

1.0dB

(MCD-111)

reference

level:

1kHz

(3)

voltmeter

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

voltmeter

(4)

Distorion

Analyzer

Fig.

4-6

Test

setup

}

VRDS-7

BLOCK

DIAGRAMS

ICFOyISA

PIS

U121

SM5840AP

U151,

251

SAA7350AGP

VDDATR

C=)

SWITCHED

CAPACITOR

NETWORK

FBR-

FILTER

CALCULATION

ATTENUATION

CALCULATING

@3)

INTR-

(8)

VSSAT

(30)

IRR

FBL+

INTL+

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

GENERATOR

LRCK

eck

——i———

mar

DATA

PROCESSOR

SUBCODE

PROCESSOR

ERROR

CORRECTOR

BOUT

16-TIMES

OVERSAMPLING

FILTER

VRDS-7

U402

CXA1372S

INPUT

SHIFT

ADDRESS

DECODER

DATA

ro)

TRACKING

PHASE

COMPENSATION

WINDOW

COMPARATOR

COMPENSATION

U410

LB1649

uaaria

Bud

|-—J

INPUT

LOGIC

(o) fo)

OUT3

Vee

VRDS-7

U491

uPD75212ACW

BASIC

INTERVAL

TIMER

/EVENT

COUNTER

TIMER/PULSE

GENERATOR

SERIAL

INTERFASE

INTERRUPT

CONTROL

GENERAL

ROM

PROGRAM

MEMORY

12160

BITS

DATA

MEMORY

512

BITS

SYSTEM

CLOCK

WATCH

CLOCK

GENERATOR

STAND

GRUICLOCK

[Bie

(Pm

OC”

U501

uPD7566CS

P10/Cino

P1t/Cint

Ca]

PORTO

BUFFER

TIMER/

Test

“}

POWVREF

CONTROL

P12/Cin2

Pt3/CIN3

P80

PROGRAM

COUNTER

PORT

LATCH

BUFFER

GENERAL

PROGRAM

INSTRUCTION

DECODER

DATA

MEMORY

Clock

STANDBY.

64x

BITS

GENERATOR

CONTROL

PORT

P11

BUFFER

-—]

—

FIP

CONTROLLER

DRIVER

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