Teac V-2RX Bedienungsanleitung

TEAC.

SERVICE

MANUAL

V-2RX/V-4RX

Stereo

Cassette

Deck

Effective:

November,

1982

B-20187

5704016100

-V-2RX/V-4RX

SPECIFICATIONS

AND

SERVICE

DATA

Notes:

Improvements

may

result

changes

specifications

and

service

data.

referenced

0.775

this

manual.

SPECIFICATIONS

Track

system

4-track,

2-channel

stereo

Heads

Erase,

record

and

playback

(V-2R

xX)

Erase,

record/playback

(V-4RX)

Type

tape

Cassette

tape,

C-60

and

C-90

(Philips

type)

Tape

speed

4.76

cm/s

(1-7/8

ips)

Input

(level

and

impedance)

MICRO-

PHONE:

Specified

input

level:

~57

(1.09

mV)/10

kahms

Minimum

input

level:

-67

(346

nV)

LINE

IN:

Specified

input

level:

-9

(275

mV)/50

kohms

Minimum

input

level:

~19

(86.9

mV}

Output

(level

and

impedance)

OUTPUT:

Specified

output

level:

-3.5

(518

mV)/

kohms

PHONES:

Specified

output

level:

-15

(138

mV)/8

ohms

Equalization

‘METAL:

3180

us+

70us

Co(CrO,):

3180us+

70us

NORMAL:

3180

120

Head

configuration

1/2-track,

1-channel

erase

head

1/4-track,

2-channel

record

and

playback

head

(V-2RX)

1/4-track,

2-channel

record/playback

head

(V-4RX)

Motors

servo

motor

(for

capstan

drive)

motor

(for

reel

drive)

Bias

frequency

100

kHz

Operation

position

Horizontal

Power

requirements

100/120/220/240

AC,

50/60

Hz,

(V-4RX:

(General

export)

120

AC,

Hz,

(V-4RX:

(U.S.A./Canada)

220

AC,

Hz,

(V-4RX:

(Europe)

940

AC,

Hz,

(V-4RX:

(U.K./Australia)

Weight

7.0

(15-7/16

Ibs.)

net

Dimensions

277

(10~7/8")

280

(11"')

SERVICE

DATA

MECHANICAL

Tape

speed

deviation

3,000

Tape

speed

drift

Wow

and

flutter

Playback:

0.06%

(WRMS)

Record/playback:

0.25%

(RMS)

Pinch

roller

pressure

350

450

(12.3

15.9

oz)

Reel

Torque

Take-up:

g-cm

(0.49

0.90

oz-inch)

Supply:

g-cm

(0.028

0.056

oz-inch)

FF./

REW:

150

g-cm

(1.1

2.1

oz-inch)

Fast

winding

time

seconds

for

MTT-501

(C-60)

ELECTRICAL

Frequency

response

See

Figs.

5-6

and

5-8

5-10

Signal-to-noise

ratio

Playback:

NORMAL:

min.

Overall:

METAL,

(CrO,):

min.

NORMAL:

min.

Erase

efficiency

min.

kHz

(measured

with

input

higher

than

the

specified

input

level)

Channel

separation

min.

kHz

Adjacent

track

crosstalk

min.

125

Total

harmonic

distortion

1.8%

less

with

METAL

and

(CrO.,)

tapes

2.0%

less

with

NORMAL

tape

Dolby

Noise

Reduction

System

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“Dolby”

and

the

double-D

symbol

are

trademarks

Dolby

Laboratories

Licensing

Corporation.

dbx

Noise

Reduction

system

made

under

license

from

dbx,

Incorporated.

The

name

“dbx”

and

the

dbx

symbol

are

trademarks

dbx,

Incorporated.

CAUTION

¢.

Parts

marked

with

this

sign

are

safety

critical

components.

They

must

always

replaced

with

identical

components

—

refer

the

appropriate

parts

list

and

ensure

exact

replace-

ment.

V-2RX/V~4RX

CASE

AND

FRONT

PANEL

REMOVAL

umbe

Disassemble

Fig.

2-1

V-2RX/V-4RX

PARTS

LOCATION

POWER

PCB

CONTROL

PCB

DBX

PCB

TIMER

PCB

VOLTAGE

SELECTOR

PEAK

PROGRAM

REC/PLAY

AMPL

PCB

JACK

PCB

LEVEL

METER

UNIT

Fig.

3-1

Top

view

LINEAR

COUNTER

POWER

SWITCH

PEAK

PROGRAM

LEVEL

METER

COUNTER

PCB

TIMER

SWITCH

“RECORD

CONTROL

PCB

(MEMORY)

OUTPUT

CONTROL

Fig.

3-2

Front

view

V-2RX/V~4RX

RECORD

SAFETY

SWITCH

CASSETTE-IN

SWITCH

SENSOR

ARM

SENSOR

ARM

ABLE

ECUPABE

ERASE

HEAD

REC

PLAY

HEAD

PINCH

ROLLER

Fig.

3-3

Transport

front

view

CASSETTE-IN

SWITCH

RECORD

SAFETY

SWITCH

TAPE

SPEED

CONTROL

REEL

MOTOR

DAMPER

CAPSTAN

MOTOR

PAUSE

SOLENOID

JOINT

PCB

PLAY

SOLENOID

Fig.

3-4

Transport

rear

view

-V-2RX/V-4RX

MECHANICAL

CHECKS

AND

ADJUSTMENTS

4-1

PLAY

SOLENOID

With

the

deck

the

play

mode,

check

that

the

pinch

roller

pressing

against

the

capstan

shaft

and

that

the

pinch

roller

arm

spring

released

from

the

pinch

roller

arm.

adjustment

required,

adjust

the

position

the

play

sole-

noid.

capstan

shaft

pinch

roller

pinch

roller

arm

spring

pinch

roller

arm

Released

here

Fig.

4-1

4-2

PAUSE

SOLENOID

The

clearance

between

the

pinch

roller

and

the

capstan

shaft

should

0.3mm

0.5

when

the

deck

the

pause

mode.

adjustment

required,

adjust

the

position

the

pause

sole-

noid.

4-3

TAPE

PATH

ADJUSTMENT

(V-2RX

ONLY)

Load

and

play

TEAC

MTT-902

mirror

tape

(C-90)

and

check

for

any

noticeable

tape

curling

the

sides

the

record-playback

head

guide.

Adjust

the

height

the

erase

head

when

curling

evident.

The

clearance

between

the

head

base

plate

and

the

head

stopper

should

0.3

0.5

mm,

shown

the

figure

below,

when

the

erase

head

touching

the

pad

holder

assembly

during

play-

back.

pad

holder

ass’y

Head

stopper

erase

head

height

adjustment

nut

Fig.

4-2

4-4

PINCH

ROLLER

PRESSURE

With

the

cassette

holder

shut

and

tape

loaded,

putihe

deck

the

play

mode

after

pushing

the

cassette-in

switch

senQr

arm

up-

wards

and

holding

it.

Hook

spring

scale

the

pinch

roller

assembly

siOwn

the

illustration.

3..

Pull

the

scale

downwards

until

there

sufficient

foie

sepa-

rate

the

pinch

roller

from

the

capstan

shaft.

Ease

pressure

until

the

pinch

roller

makes

just

enough

contact

with

the

capstan

shaft

that

the

pinch

roller

just

begins

turn.

this

point,

note

the

reading

the

scale.

shoulel

from

350

450

(12.3

oz.

15.9

o2.).

Fig.

4-3

4-5

REEL

TORQUE

Load

the

cassette

torque

meter

the

deck

and

read

the

pointer

indication

the

dial

scale

for

each

tape

transport

operation.

The

measured

torque

should

within

the

following

values:

Take-up:

g-cm

(0.49

0.90

oz-inch)

Supply:

4.g-cm

(0.028

0.056

oz-inch)

F.F/REW:

150

g-cm

(1.1

2.1

oz-inch)

4-6

TAPE

SPEED

Connect

frequency

counter

the

deck

shown

Fig.

4-4.

Play

tape

for

than

five

minutes

warm

the

deck,

then

load

TEAC

MTT-111

test

tape

containing

3000-Hz

test

tone

and

play

the

test

tape.

While

the

tape

playing,

use

non-metallic

insulated

screw-

driver

and

adjust

the

control

the

capstan

motor

for

reading

3015

3025

the

frequency

counter.

Play

the

tape

the

beginning

and

the

end,

and

check

that

the

speed

deviation

within

the

‘prescribed

limits

observing

that

the

reading

the

frequency

counter

never

deviates

than

+70

from

3000

Hz,

nor

drifts

than

any

given

time.

Frequency

Counter

Oscillator

Wow

Flutter

Meter

DECK

under

TEST

LINE

(R)

OUTPUT

Fig.

4-4

4-7

WOW

AND

FLUTTER

Note:

These

measurements

should

made

the

beginning,

middle

and

the

end

the

tape.

PLAYBACK

Connect

wow-and-flutter

meter

the

deck

shown

Fig.

4-4,

Load

and

play

TEAC

MIT-1

test

tape.

Check

that

the

reading

the

wow-and-flutter

meter

within

G.06%

(WRMS).

RECORD/PLAYBACK

Load

blank

TEAC

MTT-501

test

tape

and

record

3000-Hz

signal.

Rewind

the

tape

the

beginning

the

recorded

section,

and

play

it.

The

wow

and

flutter

should

not

than

0.25%

(RMS),

4-8

LUBRICATION

Lubrication

only

required

when

parts

are

replaced.

For

this

purpose,

use

the

oil

and

grease

specified

below.

Oil:

TEAC

spindle

oil

(from

TEAC

TZ-255

oil

kit),

Mobil

D.T.E.

Oi]

Light,

equivalent

Grease:

ORE-LUBE

G1/3

equivalent

Apply

drop

oi!

with

oil

applicator

point

about

1/3

the

way

down

the

shaft,

from

the

free

end

the

flywheel,

then

insert

the

shaft

into

the

capstan

housing.

Apply

suitable

amount

light

grease

the

well

the

flywheel

bearing.

Capstan

flywheel

ass‘y

capstan

shaft

well

flywheel

[

Apply

drop

oil

here

bearing

Capstan

housing

Fig.

4-5

|_V-2RX/V-4RX

4-9

VOLTAGE

CONVERSION

(GENERAL

EXPORT

MODELS

ONLY)

Always

disconnect

the

power

line

cord

before

making

these

adjustments,

Locate

the

voltage

selector

the

bottom

side

shown

the

illustration,

Using

regular

screwdriver,

turn

the

selector

until

the

numerals

corresponding

the

voltage

requirements

your

area

appear,

100/120

220/240

Fig.

4-6

_V-2RX/V-GRX

ELECTRICAL

CHECKS

AND

ADJUSTMENTS

PRECAUTIONS

Before

performing

adjustments

and

checks,

clean

and

demag-

netize

the

entire

tape

path.

Make

sure

the

deck

properly

set

for

the

voltage

your

local-

ity.

general,

adjustments

and

checks

are

made

the

order

L-ch

then

R-ch.

Double

REF.

Nos.

and

test

point

designations

indicate

L-ch/R-ch.

(Example:

R11/R21)

Oscillator

Distortion

Analyzer

Attenuator

referenced

0.775

voltmeter

thi

references

used,

appropriate

compensation

should

made.

The

voltmeter

used

the

procedures

must

hav@

input

impedance

1Mo

more.

Note

the

“deck

settings”

the

top

each

chart.

The

settings

apply

all

checks

for

specific

chart

unless

explicitly

stated

otherwise.

Oscilloscope

Voltmeter

1kHz

Filter

LINE

OUTPUT

Fig.

5-1

Basic

test

setup

Deck

settings:

LEVEL

cont.:

OFF

(depressed)

MONITOR

TEAC

test

tapes:

{V-2RX

only):

TAPE

MTT-150:

For

Dolby

level

calibration

SYSTEM

sw:

OUT

MTT-356:

‘For

playback

barten

response

TAPE

sw:

METAL

check

for

METAL,

(CrO2)

5-1

PLAYBACK

PERFORMANCE

OUTPUT

cont.:

MAX

MTT-501:

For

S/N

check

with

NORMAL

ADJUST

MEASURING

ITEM

SETTING

INPUT

SIGNAL

(or

CHECK)

POINT:

RESULT

REMARKS

OUTPUT:

Refer

Fig.

REC-PLAY

MEDIC

eneee

Phase:

within

45°

5-5.

head

Connection:

Fig.

5-2

Azimuth

screw

OUTPUT:

azimuth

MTT-356

(12.5

kHz)

R-P

head

(Figs.

5-3,

5-4)

Max.

output

L-&

R-ch’s

(on

VTVM)

Specified

output

——

level

MTT-150

OUTPUT:

Spec.

output

R11/R21

~3.5

(518

mV)

level

PEAK

PRO-

PEAK

PROGRAM

GRAM

LEVEL

—

MTT-150

R15/R25

LEVEL

METER:

METER

0dB

TAPE

sw:

METAL

kHz

output

lower

then

spec,

connect

C107

MTT-356

Check

OUTPUT:

Fig.

5-6

(C202)

parallel

with

C101

(C201)

REC/PLAY

AMPL

Frequency

PCB.

response

TAPE

sw:

NORMAL

MTT-356

OUTPUT:

kHz

should

approx.

Check

higher

than

measured

above

step.

F i

Fully-erased

Ratio

spec.

Signal-to-noise

OUTPUT:

ratio

TAPE

sw:

NORMAL

MTT-501

tape:

Check

min.

outp

(Use

bulk

tape

eraser)

-3.5

noise

Deck

settings:

eee

LEVEL

cont:

MONITOR

5-2

MONITOR

PERFORMANCE

OUTPUT

cont.:

V-2RX/V~4RX

REC/PAUSE

mode

(V-4RX

only)

OFF

(depressed)

{V-2RX

only):

SOURCE

SYSTEM

sw:

OUT

MAX

ITEM

SETTING

INPUT

SIGNAL

ADJUST

(or

CHECK)

MEASURING

POINT:

RESULT

REMARKS

MICROPHONE:

400

Hz/-67

(346

pV)

OUTPUT:

~3.5

(367

731

mV)

MICROPHONE

min.

input

level

Min,

input

level

RECORD

cont.:

Max.

LINE

IN:

400

Hz/-19

(86.9

mv)

OUTPUT:

~3.5

LINE

min.

input

level

LINE

IN:

400

Hz/-9

(275

mV)

Specified

LINE

Specified

setting

RECORD

cont.

RECORD

cont.

(L/R)

OUTPUT:

~-3.5

(518

mV)

Connection:

Fig.

5-7

400

Hz/-9

revel

(275

mv)

DECK

under

TEST

OUTPUT

Voltmeter

Fig.

5-2

Test

setup

for

azimuth

check

REC

PLAY

head

Fig.

5-3

Azimuth

screw

location

(V-2RX)

REC/PLAY

head

azimuth

adjusting

screw

fixed

Fig.

5-4

Azimuth

screw

location

(V-4RX)

input

level

IMPORTANT:

not

change

the

setting

the

RECORD

contro!

after

establishing

the

setting

above.

PEAK

PRO-

LINE

IN:

PEAK

PROGRAM

GRAM

LEVEL

400

Hz/-9

LEVEL

METER:

METER

(275

mV)

PHONES

output

LINE

IN:

PHONES:

~-15

(97.5

195

mV)

0°

(IN

PHASE)

45°

90°

180°

Fig.

5-5

Confirming

phase

relationship

TAPE

sw:

METAL

Tape:

MTT-356

V-4RXy

315

(dB)

—3

63k

10k

(Hz)

Fig.

5-6

Playback

frequency

response

Voltmeter

DECK

under

TEST

PHONES

Fig.

5-7

Test

setup

for

PHONES

check

V-2RX/V-4RX

LEVEL

cont.:

OFF

(depressed)

MONITOR

(V-2RX

only):

TAPE

RECORD

cont.:

Specified

position

(item

SYSTEM

sw:

OUT

TEAC

test

tapes:

BIAS

FINE

cont.

(

;

)

MTT-5072:

For

METAL

recorcel

test

(V-2RX

only):

(center

detent

position

MTT-5061:

For

(CrO,)

record

test

5-3

RECORDING

PERFORMANCE

output

cont.:

MAX

MTT-501:

For

NORMAL

record

test

ADJUST

MEASURING

ITEM

SETTING

INPUT

SIGNAL

(or

CHECK)

POINT:

RESULT

LINE

IN:

(V-2RX

TP11/TP21

10.BIAS

trap

REC/PLAY

REC/PAUSE

signal

U104/U204

Min.

reading

(V-4RX)

Adjust

the

order

steps

(2)

(3)

(4).

LINE

IN:

C155/C255

OUTPUT:

TAPE

sw.:

METAL

400

6.3

kHz

(V-2RX)

Nearly

equal

Tape:

MTT-5072

alternately/-42

C131/C231

level

both

{6.15

mV)

(V-4RX)

frequencies

LINE

IN:

OUTPUT:

11.

Record

bias

TAPE

sw.:

(CrO,)

400

6.3kHz

243

Nearly

equal

For

L-

Tape:

MTT-5061

alternately/-42

""""

level

both

R-ch

(6.15

mv)

frequencies

LINE

IN:

OUTPUT:

TAPE

sw.:

NORMAL

400

6.3

kHz

R12

Nearly

equal

For

L-

Tape:

MTT-501

alternately/-42

|“

""""

level

both

R-ch

(6.15

mV)

frequencies

LINE

IN:

TAPE

sw.:

METAL.

OUTPUT:

Tape:

MTT-5072

Noe

R14/R24

-6.5

(367

mV)

LINE

IN:

OUTPUT:

12.

Record

level

TOEE

400

Hz/-12

Check

-6.5

#1.5

(195

mV)

(308

436

mv)

LINE

IN:

OUTPUT:

TAPE

sw.:

NORMAL

400

Hz/-12

Check

-6.5

+1.5

Tape:

MTT-501

(195

mv)

13.

Total

harmonic

LINE

IN:

OUTPUT:

“di

torti

Same

above.

400

Hz/-12

Check

1.8%

less

with

METAL,

(CrO2)

eee

(195

mV)

2.0%

less

with

NORMAL

LINE

IN:

TAPE

sw.:

METAL

OUTPUT:

Tape:

MTT-5072

dicta

aol

Fig.

5-8

LINE

IN:

14.

Frequency

TAPE

sw.:

(CrO,)

OUTPUT:

response

Tape:

MTT-5061

Check

Fig.

5-9

LINE

IN:

owe

belles

Required

signal/

Check

ein

E18

pens

-42

(6.15

mV)

frequency

response

out

specification,

recheck

#11.

‘Record

bias’.

LINE

IN:

400

Hz/-9

TAPE

sw.:

METAL

OUTPUT:

Tape:

MTT-5072

(275

Gheck

min.

signal

LINE

eee

‘ ‘

400

Hz/-9

atio

spec-

15.

Signal-to-noise

TAPE

sw.:

(CrO,)

OUTPUT:

ratio

Tape:

MTT-5061

Check

min.

ieeeu

anaes

signal

LINE

IN:

400

Hz/-9

TAPE

sw.:

NORMAL

OUTPUT:

Tape:

MTT-501

aim

neal

min.

signal

(2.

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