Teac V-870 Bedienungsanleitung

Andere Handbücher für V-870

1

Inhaltsverzeichnis

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TEAC

SERVICE

MANUAL

Vv:

870

STEREO

CASSETTE

DECK

V-870

1

SPECIFICATIONS

{tte

Track

System

4-Track,

2-Channet

Stereo

Heads

3:

1

Erase,

t

Record

and

1

Playback

(Combination)

Type

of

Tape

Cassette

tape

C-60

and

C-

30

{Philips

type)

Tape

Speed

4.76

cm/sec.

(1-7/8

ips)

Motors

3:

1

DC

Servo

motor

{for

capstan

drive}

1

DE

motor

(for

reel

drive}

1

OC

motor

(for

ancillary

control}

Wow

and

Flutter

(WRMS)

0.025

%

Frequency

Response

(Overail)

—20

dB

20

—

21,000

Hz

Metal

Tape

“(25

-—

20,000

Hz

+3

d8)

20

—

20,000

Hz

CrO.

Tape

(25

—

19,000.Hz

+3

dB).

20

~

18,000

Hz

Normal

Tape

(25

—

17,000

Hz

+3

dB)

iat

etch

Ratio

{Overall}

80

d8

(3%

THD

Level,

Weighted)

"70

dB

(Solby

Bin,

aver

§

kHz),

80

dB

(Dolby

C1

,over

1

kHz),

ait

Fast

Winding

Time.

Approximately

100

,

‘seconds

for

C-

60

NOTES:

Improvements

may

result

in

SPECIFICATIONS

changes,

Value

of

“dB”

in

the

data

refers

to

0

dB

{0,775

V),

except

where

Specified.

CAUTION

4.Parts

marked

with

this

sign

are

safety

critical

components,

They

must

always

be

replaced

with

identical

components

—

refer

to

the

appropriate

parts

list

and

ensure

exact

replace-

ment.

Dojhy

Noise

Reduction

System

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“Dolby”

and

the

deuble-D

symbol

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

Inputs

Line:

60

mV,

50k

ohms...

Outputs

Line:

0,3

Vv

for

load

mehr

of

50k

ohms

or

more

Ree

Headphones:

8

ohms”.

~

Power

Requirements

120/220/240

vi

AC,

S0/60

Hz

(General

export

models)

120

V

AC,

60

Hz

(U.S.A./Canada)

220

V

AC,

50

Hz

(Europe)

240

V

AC,

50

Hz

(U.K./Australia)

Power

Consumption

27

W

Dimensions

(Wx

H

x

D)

435

x

123.5

x

279.5

mm

(17-7/8"

x

4-7/8"

x

11"

Weight

5.9

kg

($3.01

{bs)

net

Standard

Accessories

Input-odtput

connection

cords

@

Specifications

were

determined

using

metal

tape

except

as

noted.

@

tmprovements

may

result

in

specifica-

tions

or

features

changing

without

notice.

@

Photos

and

illustrations

may

differ

slightly

from

production

models.

Ee

,

LIAR

OEO,

FHEK

PETSCEMHUET.

_

AVI

PIO

0

4B

S0.775V

FHKE

LTVETF.

=

AFUISHPBRBACTS,

RT

SHH

TT

7

Py

Ot

LOA

Ie

BAL

TS

Ea.

®RILE—/

f

KU

PF

IVEY

TATAéAls,

PIVE—MR

PPAR

RBC

BHOSRBENTONE.

®PILE—-RU

Old,

KILC

RAO

SRR,

V-870

2

REMOVAL

OF

EXTERNAL

COMPONENTS

HB

OH

LA

DisassembjJe

in

number-order

HSL

HLTK

a

POWER

SW

PCB

Power

transformer

7OAs

sw

Rec

safety

sw

’

3

PARTS

LOCATION

36 se

AC

i

METAL

sw

Cassette

sw

Fig,

3-1

Top

view

JOINT

PCB

C

MAIN

PCB

PhS

oe

JOINT

PCB

A

DISPLAY

PCB

JOINT

PCB

B

the

reustee

4.

MECHANICAL

ADJUSTMENTS

AND

CHECKS

GAB

DAME

CHEER

4-1

PINCH

ROLLER

PRESSURE

1.

Press

the

cassette

switch

(see

Fig.

3-1)

up

to

set

dhe

deck

ta

the

playback

mode.

The

cassette

switch

should

be

pressed

up

throughout

measure-

ment,

.

Hang

the

spring

scale

from

the

pinch

roller

arm,

3.

Extend

the

spring

in

the

direction

shown

in

the

figure

watil

the

rotation

of

the

pinch

roller

stops,

then

return

it

gradually

so

that

the

pinch

roller

cames

into

contact

with

the

capsten

shaft

again.

4,

Read

the

value

at

the

moment

the

pinch

roller

starts

rotating.

Standard

values

Take-up

side

Supply

side

ho

390

g

—

490

g

(13.8

oz

—

17.3

oz}

170

g

—

230

g

(6.0

oz

—

8.1

02)

Supply

side

TS

4-1

EwrFea—

SRD

1

ARYh.

Rt

F

(FIO.

$1

BRR)

BEAICHUTSY

4+E~KEGS,

HER,

AvVYb-

Zt

Y

FIG

LAICHUBU

STE.

2,

CYR

+O-D-

P-ACARREENTS.

3.

Bee

vs-

O-DOREAILESE

CHROAMCEROK

.

&,

CyF-o-

PRCT

ame

vay

helenae

KORACI.

4,

¢yvF+oO-

SHOOMHSLEOWERE,

RBI

FL7PYTH

390

g

~

490

9

HTS4IH

178

g

~

230

9

Take-up

side

T4AIF

YT

H

Fig.

4-1

Pinch

roller

pressure

measurement

EY

F-O—-

3

ci

A

-

4-2.

TAPE

PATH

ADJUSTMENT

-

Note:

The

following

special

tools

and

tapes

are

required

for

this

section.

Head

check

jig

A

(P/N

5736006600)

Head

check

jig

B

(P/N

5736006700)

MTT-150

test

tape

(for

Dalby

level

calibration)

MTT-356

(or

MTT-256}

test

tape

(for

frequency

response

check)

MTT-902

mirror

tape

{0-90

type)

DECK

undar

TEST

R

OUTPUT

AC

Voltmeter

Fig.

4-2

Test

setup

for

azimuth

adjustment

PYUVARBBRG

4-2

F—-PHRTMWE

HE

COMBEITSIROICAADNBR,

FAR:

TH.

Av

FiBRA

(P/N:

5736006600)

Aw

PAB

(P/N:

5736006700)

MTT-150

FAR+7T—-DCRILE—:

MTT-356

(KIKMTT-256)

TAR:

=A)

MTT-902

=

3—

F—

PALE

PAIL:

Gy

bh

AD

TT

FEB

RE

—F

(C-908)

Oo

O°

(in

phase)

45° 90°

~—S-135°—-

180"

(out

of

phase)

Ti

e468

aa

PAOD

SE

Fig.

4-3.

Confirming

phase

relationship

AB

RTH

Note

1:

When

the

record/playback

head

has

been

replaced,

tighten

-

screws

(A),

(B),

(C}

shawn

in

Fig.

4-6

until

they

stop,

then

siacken

them

by

1-1/2

turns

before

starting

atign-

ment.

Note

2:

When

the

erase

head

has

been

replaced,

install

it

as

shown

=

De

o

>

on

~~

in

Fig.

4-6:

.

Attach

head

position

alignment

jigs

A

and

B,

then

set

the

deck

to

the

play

mode,

Fit

jig

B

on

the

tape

guide

of

the

record/playback

head

as

shown

in

Fig.

4-5,

then

align

the

height

with

screw

(A)

as

shown

in

Fig.

4-6,

Fit

jig

B

to

the

head

as

shawn

in

Fig.

4-5

to

check

its

tilt

and

align

it

using

screws

(B)

and

(C)

shown

in

Fig.

4-6,

Then

align

the

height

again

with

screw

(A).

Repeat

alignments

in

procedure

2

and

3

two

or

three

times

to

align

height

and

tilt.

(When

adjusted

to

the

standard

height,

the

head

should

be

wnder

the

tape

guide.)

.

Fit

jig

B

to

the

tape

guide

of

the

ieft

pinch

roller

and

align

the

height

with

nut

{E).

(The

standard

height

is

above

the

tape

guide,)

.

Play

test

tape

MTT-902,

and

adjust

nut

(E)

so

that

the

lower

edge

of

the

tape

guide

of

the

record/playback

head

is

in.contact

with

the

tape

edge,

but

the

tape

is

not

curted.

.

Adjust

the

azimuth

of

the

playhack

head

with

screw

(C)

shown

in

Fig.

4-6

according

to

item

5-3

(an

page

15).

If

the

screw

is

rotated

by

half

a

turn

or

more,

turn

screws

(A)

and

(B)

by

the

same

amount

then

align

again

from

item

6

to

correct

the

height

of

the

tape

guide

of

the

record/playback

head.

.

Adjust

the

azimuth

of

the

recard

head

with

screw

(0)

shown

in

Fig.

4-6

according

to

item

5-5,

(Refer

to

page

18.)

Screw

(D)

should

not

be

turned

more

than

half

a

turn.

.

After

alignment

is

complete,

check

that

the

tape

does

not

curl

over

the

tape

guide

by

repeating

play

and

stop

operations.

head

check

jig

A

(5736006600)

REC

Head

P/B

Head

Ban»

F

BEA

F

Fig.

4-6

21

BR

BAy

FERRE

La.

Fig.

4-6

ORD

(A),

(8),

(0)

MILKSKTHS,

TOMBASTNTNORY

&

1.5

DEOSORKKETHBEROSCE.

322

BEAy

ReReLecaid,

Fig.

46°

OLIKRATS.

1.

AY

FORMBRBIBR

A,B

ety

hULS

LT

+

E-KRTS.

2.

Fig.

4-4

DADKH+

BAY

EOT-7

+

HFK

B

#4T,

Fig.

46

ORD

(A)

CHARIS.

3,

Fig.

4-5

OLDCARB

Ay

FICMTCFIV

SHER,

Fig.

4-6

ORY

(B),

(0)

THRLER,

BRAY

(A}

T

BS

HET

S.

,

4.

bie

2,

3

ORs

2~3

DHRORL,

BS,

FIVbeB

TS.

(BEOREMT-TF

>HI

FORHECTS).

8

EEYF+O-FOF—7F

HA

PRBR

BAT,

Fy

{E)

CTHSEHBITS.

(BAIOBRT-T*

H7KOEM

etd).

6

FAb+F7—-TF

HIT-902

SESH,

Re

BAY

FOT-T

H4KOPMRD-VUGVBRKSRSASIYR

(De

7?

MRSS.

7,

BEAySOPIVA®

$318

(11

N8-DBR)

Kiko

Tt

Fig.4-6

ORY

(C)

CHRYS.

1/2

BRK

EBILE

ESR:

BAY

FOFT-7

+

AA

PRS

KkEnDtSKH,

2D

(A),

(3)

DARELEBRS

ACROR

BEPORST.

:

8.

REAYFOPYVA®

5-518

(13

A-DBR)

ichto

T

Fig.

4-6

ORY

(D)

CTHRTS.

2Y

(0)

ORRBHIt

1/2

MRIKALTS.

9.

BUOMROBR,

Ter

-

AbyvTRBORBL,

7-7

HL

ECF-TRH-VLBWE

ESTERS,

head

check

jig

B

head

check

jig

B

(5736006700)

head

check

jig

A

{5736006

700}

_(5736006600}

Fig.

4-4

Fig,

4-5

igt

dj.

A

REC

Head

Azimuth

Screw

D

a

al

aa

tas

py

uo

REC

7

2

V

ARE

RY

These

should

touch

P/B8

Head

4

Tilt

Adj.

Screw

8

HBSUAR

Azimuth

Screw

C

panes

Fl

FBR

P/BTYVVAWERAY

4-3

REEL

TORQUE

CHECKS

AND

ADJUSTMENTS

1.

Using

a

cassette

torque

meter,

check

that

reel

torque

at

each

tape

transport

operation

is

within

the

following

specified

range.

25

~

60g-cm

{0.34

~

0.83

02-inch}

Fast

Forward/

90

~

160

g-cm

Rewind

(1,25

~

2.22

02-inch}

*Back

Tension

ft.

Connect

a

BC

voltmeter

between

TP.4

and

TP.GND

on

the

main

PC

board.

2.

Play

the

middle

part

of

test

tape

MTT-5511

and

adjust

R42

so

that

the

voltmeter:

shows

the

values

in

the

above

table.

4-4

TAPE

SPEED

ADJUSTMENT

1,

Connect

a

frequency

counter

to

the

deck

as

shown

in

Fig,

4-7.

2.

Playing

the

mid

portion

of

an

MTT-111

test

tape,

adjust

the

semi-fixed

resistor

on

capstan

motor

so

that

tape

speed

becomes

3,000

Hz

«5

Hz.

An

insulated

and

non-metallic

flat-head

screwdriver

should

be

used

for

this

adjustment.

3.

Check

that

the

following

values

are

obtained

at

the

beginning

and

at

the

end

of

the

tape.

Deviation:

3,000

Hz

+45

Hz

Width

of

deviation:

Within

30

Hz

4-5

WOW

AND

FLUTTER

CHECKS

Note:

These

measurements

should

be

made

at

the

beginning,

middie

and

the

end

of

the

tape.

4-5-1

PLAYBACK

METHOD

1.

Connect

a

wow

and

flutter

meter

to

the

deck

as

shown

in

Fig.

4-7.

. .

2.

Load

a

TEAC

MTT-111

test

tape

or

equivalent

and, play

it

to

measure

the

wow

and

flutter

value.

3.

Specifications

are

shown

belaw.

0.05%

WRMS

4-3

YI

bILPRERBRURE

lL

AY

hMhILD

-

A-FTKSMEMOFROBANT

HSLLAERATS.

FABPIYTS

+b

25~60

ge

cm

-

*

KRY

DFYY

ay

be

6,

40~0,

56V

RNY

DF

YvrYar

1.

OC

@SQERe

HAIN

PCB

@

TP.4

&

TP.GND

(CRESS.

2

FAbe

FF

NIT-5511

OPRAHESHEL,

BEHOHAR

BLEROWKESLS

M2

SBMTS.

44

FH

TREE

lL

Big

7

OKDSICIMRKADY

SSP

y

ICMAT

S|

2

MTT-1SFAb-F-7O

PM

BEBALT.

FT

—OME

3,000Hz

TSH2IZTHAAKAI

$~pAIAZGuV:

E-FOP

PEI

A

PRET

S.

PARTS

RANKS

REY

IT

A

KS

NGMHTSCE,

3.

FIO

BW

BMUICT

FROMMBONSILE

FETS,

Wi:

3,000Hz

=

45Hz

ee:

30Hz2

Law

99

-7o>yvy

FER

JER

F—

TORO,

PH,

BRU

CEM

ENWMETS.

4-5-1

BAER

lL

Fig.4-7

MEAD

Doyo

A—-SEFY

FCM

rss)

°

.

2.

TEAC

MTT-1UF

Ab

+>

F—TPRidH

soe

RAK,

HELID-

Poy

Tew

TS.

3,

BK

0.0599

WRMS

(MB

ReAB

IE)

4-5-2

RECORD/PLAYBACK

METHOD

Note:

When

measuring

with

this

method,

the

recorded

section

should

be

played

back

repeatedly

to

abtain

an

average

vaiue,

Be

careful

not

to

read

the

meter

for

those

parts

of

the

tape

in

which

wow

and

flutter

components

in

recording

and

play-

hack

cancel-each

other.

4.

Load

a

blank

FEAC

MTT-5521

test

tape

or

equivalent

and

‘record

a

3,000

Hz

signai.

5.

Rewind

the

tape

to

the

beginning

of

the

recorded

section,

and

play

it.

6.

The

wow

and

flutter

should

not

be

mare

than

specified.

Specification:

0.2%

RMS

oscillator

frequency

counter

i

wow/flutter

meter

DECK

under

test

|

output

Connection

for

tape

speed,

wow

and

flutter

F~-TRE,

VO-7evF

MEER

Fig,

4-7

4-6

LUBRICATION

Lubrication

is

only

required

when

parts

are

replaced.

For

this

pur-

pose,

use

the

oi}

and

grease

specified

betow.

Oil:

TEAC

TZ-255A

motor

oi

(fram

TEAC

TZ-255

oil

kit},

Mobil

D.T.E.

Oil

Light,

or

equivalent

Grease:

ORE-LUBE

G1/3

or

equivalent

1.

Apply

a

drop

of

oil

with

an

oil

applicator

to

a

point

about

1/3

the

way

dawn

the

shaft

(fram

the

free

end}

of

the

flywheel,

then

insert

the

shaft

inta

the

capstan

housing.

2.

Apply

a

suitable

amount

of

light

grease

to

the

well

of

the

fly-

wheel

bearing.

4-7

VOLTAGE

CONVERSION

(FOR

GENERAL

EXPORT

MODELS)

ALWAYS

DISCONNECT

TRE

POWER

LINE

CORD

BEFORE

MAKING

THESE

CHANGES,

,

1.

Locate

the

voltage

selector

on

the

rear

panel

of

the

deck

as

shown

in

the

illustration,

2.

Using

a

regular

screwdriver,

turn

the

selector

until

the

numerais

corresponding

to

the

voltage

requirements

of

your

area

appear.

4-5-2

SRB

.

HR:

RMRAOBS

EMPEREDAL

YT.

FH

.

SRREL,

KACENS

Fie.

AL

RIEL

REL

EROIY

-

DS

y

IROOM

+-p

VEVLEETHFERKEOKSITTS,

F5YI*

FAK

F—TTEAC

MTT-S821R

ist

BTCAL,

3,00H

24

EME

S

S.

F

—

FORE

VERDPEERLTHETS.

6.

ID

DI

y

SHAFT

ROM

DS

HNEUT

ES

He:

0.29%

RMS

(JERR

ARH

IF)

on

4-6

j=78

EGASMAVRIRANSHOALRTSH.

SEALED

U-—RZSERALEF,

AIL:

TEAC

TZ-255AE—%

+

4-1

JL(TEAC

TZ-2559-1

JU

Hy

RAPD)

E-EWD+

TBAT

STK

KEI

#834

oo

,

FY—A:AP

+

W—IGWV/3,

RRA

AA

Li.

DST

VEO

EMD

91/3

F

7

RRA,

BEE

ITT.

A

Ju

1

AI,

DOA

I

WHEE

DAB

Y

+

1

QUVUVINSSATS.

2.

HEOTU-ALKDSAKT

IL

NPUVFRIADIS,

TRUBIC

IAP

Be

Ic

BAAR

capstan

flywheel

ass’y

capstan

shaft

weil

of

flywheel

5

stan

housin:

bearing

cepeta

;

9

Apply

a

a

drop

of

oil

here

—~BiEBF

S

Fig.

4-8

Fig.

4-9

Voltage

conversion

5

ELECTRICAL

CHECKS

AND

ADJUSTMENTS

PurAPROMR

&

aE

PRECAUTIONS

5-1

fi

.

Since

this

deck

has

an

automatic

tape

selector,

be

sure

to

use

1.

BREST

PUIS

BARERBIC

EO

TORT

OT,

test

tapes

that

have

tape

position

detecting

holes.

FARK

F-—PALGF—-—D

+

RYVY

a>

PHLOHSH

.

Before

performing

adjustments

and

checks,

clean

and.

demag-

DEBRLUTC

EA,

netize

the

entire

tape

path,

then

check

tape

motion

condition.

2.

PYIRORMRORAIC,

WHA

EK,

mR

BAYE,

+

i

ie

sure

the

deck

is

propedy:

set

for

the

voltage

in

your

_JHTFAPENENERAWREL,

7U-TIECURAL

ocality,

ees

be

Seifa

Peni

ier

ee

.

in

general,

adjustments

and

checks

are

made

in

the

order

of

L-ch

C7

JRTARERET

Se

é

then

R-ch

FIOBBOMURU,

PBRUF

oy

7lkL-ch,

R-choin

Double

REF.

Nos.

such

as

R12/R22

indicate

L-ch/R-ch.

FCI

TRS.

.

The

AC

volimeter

used

in

the

procedures

must

have

an

input

MRI2Z/“R2MOA

AIC

PANCHOSHM

ES

IAL-ch’R-ch

impedance

of

1

MQ

or

more.

ERULET

.

0

dB

is

referenced

to

0.775

V.

4.

VAIL

ADT

VESVAIMOLLEOSOSBALTE

eh.

5.

O0dB=0.775V

§-2

TEAC

TEST

TAPES

MTT-158:

For

Dolby

level

calibration

MTT-356:

For

playback

frequency

response

check

for

CrO2,

METAL

MTT-256:

For

playback

frequency

response

check

for

NORMAL

MTT-5571:

For

METAL

record

test

MTT-5561:

.

For

CrO.

record

test

MTT-5511:.

For

NORMAL

record

test

-

Oscillator

Oistortian

Analyzer

Attenuator

LINE

IN

OUTPUT

5-2

TEACT

AF:

aT

MTT-150

:

MTT-356

:

MTT-256

:

MTT-5571:

MTT-5561:

MTT-5511:

KES

+

DA

ty

bh

CrOg,METAL

3-0-3342

RBA

A

NORMALS

—

JOB

4:

Mik

eHtE

WE

METALF—JORBRT

AA

CrOgF

—-JORERT

AKA

NORMALP—

JORERT

ARM

Oscilloscapea

AC

Voltmeter

Fig.5-1

Basic

testsetun

SABER

10

ce

|

te

ei

Fig.

5-2

Chack

and

adjustment

points

on

MAIN

PCB

Oscilloscope

Amp

SPKR

DECK

under

TEST

OUTPUT

AC

Voltmeter

Fig.

5-3

Test

setup

for

azimuth

check

Gira

BS

abe

srl

ba