Teac V-66C Manuel utilisateur

TEAC

SERV

ICE

MANUAL

V-

Stereo

Cassette

Deck

Effective:

September

1982

B-20125

5704015300

V-66C

SPECIFICATIONS

AND

SERVICE

DATA

SPECIFICATIONS

Track

system

4-track,

2-channel

stereo

Heads

erase,

record/playback

Type

tape

Cassette

tape,

C-60

and

C-90

(Phillips

type)

Tape

speed

4.8

cm/s

(1-7/8

ips)

Input

(level

and

impedance)

MIC:

Specified

input

level:

Minimum

input

level:

LINE

IN:

Specified

input

level:

Minimum

input

level:

Output

(level

and

load

impedance)

OUTPUT:

Specified

output

level:

-3.5

(518

mV)/50

kohms

PHONES:

Specified

output

level:

-17

(109

mV)/8

ohms

Equalization

-57

(1.09

mV)/10

kohms

-67

(346

mV)

-9

(275

mV)/50

kohms

-19

(86.9

mV)

METAL:

3180

(Cr0

)

3180

70ms

NORMAL:

3180

ms+

120

Head

configuration

1/2-track,

1-channel

erase

head

1/4-track,

2-channel

record/playback

Motor

servo

motor

(for

capstan

drive)

motor

(for

reel

drive)

Bias

frequency

100

kHz

Operation

position

Horizontal

Power

requirements

100/120/220/240

VAC,50/60

Hz,25

W(General

export

model)

120

AC,

Hz,

(U.S.A./Canada

model)

220

AC,

Hz,

(Europe

model)

240

AC,

Hz,

(U.K./Australia

model)

Weight

6.0

(13-4/16

lbs.)

net

Dimensions

(17")

—k

Irani

n-i

-TZZ

—

-izzrz!

Fig.

1-1

SERVICE

DATA

MECHANICAL

0.06%

(WRMS)

0.25%

(RMS)

350

450

(12.3

15.9

oz)

Tape

speed

deviation

3,000

±70

Tape

speed

drift

Wow

and

flutter

Playback:

Record/playback:

Pinch

roller

pressure

Reel

torque

Take-up:

g-cm

(0.49

0.90

oz-inch)

Supply:

g-cm

(0.028

0.056

oz-inch)

F.F.:

150

g-cm

(1.1

2.1

oz-inch)

REW:

150

g-cm

(1.1

2.1

oz-inch)

Fast

wind

time

sec.

for

MTT-501

(C-60)

Auto

end-stop

time

sec.

less

ELECTRICAL

Frequency

response

Playback:

See

Fig.

5-6.

Overall:

See

Fig.

5-8.

Signal-to-noise

ratio

Playback:

NORMAL:

min.

Record/playback:

METAL,

(Cr0

)

min.

NORMAL:

44dBmin.

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

2.2%

less

with

METAL/Co

(Cr0

)

2.0%

less

with

NORMAL

NOTES:

•

Improvements

may

result

SPECIFICATIONS

AND

SERVICE

DATA

changes.

•

Value

“dB”

the

data

refers

(0.775

V),

except

where

specified.

•

Dolby

Noise

Reduction

System

manufactured

under

license

from

Dolby

Laboratories

licensing

Corporation.

“Dolby”

and

the

double-D

symbol

are

trademarks

Dolby

Laboratories

Licensing

Corporation.

CAUTION

Parts

marked

with

this

sign

are

safety

critical

components.

They

must

always

replaced

with

identical

components

refer

the

TEAC

parts

list

and

ensure

exact

replacement.

V-66C

PARTS

LOCATION

POWER

TRANSFORMER

CONTROL

PCB

R/P

AMPL

PCB

TIMER

PCB

INPUT

PCB

Fig.

3-1

Top

view

TAPE

COUNTER

PEAK

LEVEL

DISPLAY

LAMP

PCB

SENSOR

PCB

OPERATION

PCB

Fig.

3-2

Front

view

RECORD

SAFETY

SWITCH

CASSETTE

SWITCH

SENSOR

ARM

SENSOR

ARM

ERASE

HEAD

REC/PLAY

HEAD

PINCH

ROLLER

Fig.

3-3

Transport

front

view

TAPE

SPEED

CONTROL

CASSETTE-IN

SWITCH

RECORD

SAFETY

SWITCH

CAPSTAN

MOTOR

REEL

MOTOR

DAMPER

V-66C

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

solenoid.

capstan

shaft

Fig.

4-1

4-2

PAUSE

SOLENOID

The

clearance

between

the

pinch

roller

and

the

capstan

shaft

should

0.3

0.5

when

the

deck

the

pause

mode.

adjustment

required,

adjust

the

position

the

pause

solenoid.

4-3

PINCH

ROLLER

PRESSURE

With

the

cassette

holder

shut

and

tape

loaded,

put

the

deck

the

play

mode

after

pushing

the

cassette-in

switch

sensor

arm

up-wards

and

holding

it.

Hook

spring

scale

the

pinch

roller

assembly

shown

the

illustration.

Pull

the

scale

downwards

until

there

sufficient

force

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.

should

from

350

450

(12.3

oz.

15.9

oz.)

Fig.

4-2

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:

g-cm

(0.028

0.056

oz-inch)

F.F/REW:

150

g-cm

(1.1

2.1

oz-inch)

4-5

TAPE

SPEED

Connect

frequency

counter

the

deck

shown

Fig,

4-3.

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

4-6

WOW

AND

FLUTTER

Note:

These

measurements

should

made

the

beginning,

middle,

and

the

end

the

tape.

PLAYBACK

Connect

wow-and-flutter

meter

the

deck

shawn

Fig.

4-3.

Load

and

play

TEAC

MTT-111

test

tape.

Check

that

the

reading

the

wow-and-flutter

meter

within

0.06%

(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).

V-66C

4-7

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.

Oil

Light,

equivalent

Grease:

ORE-LUBE

G1/3

equivalent

Apply

drop

oil

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

fly¬

wheel

bearing.

capstan

flywheel

ass'y

4-8

VOLTAGE

CONVERSION

(GENERAL

EXPORT

MODELS

ONLY)

Always

disconnect

the

power

line

cord

before

making

these

adjustments.

Locate

the

voltage

selector

the

rear

panel

shown

the

illustration.

Using

regular

screwdriver,

turn

the

selector

until

the

numerals

corresponding

the

required

voltage

appear.

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:

R12/22)

Oscillator

referenced

0.775

voltmeter

that

references

used,

appropriate

compensation

should

made.

The

voltmeter

used

must

have

input

impedance

1M-

ohms

more.

Note

the

“Deck

settings”

the

top

each

chart.

The

settings

apply

all

checks

for

the

specific

chart

unless

explicitly

stated

otherwise.

Oscilloscope

Attenuator

•

Amp

SPKR

DECK

under

TEST

1kHz

Filter

LINE

OUTPUT

Voltmeter

-o

Fig.

5-1

Basic

test

setup

Distortion

Analyzer

•

O_00

R11/R21

Playback

R12/R22

Playback

level

R13/R23

Record

level

R14/R24

Meter

level

C11/C21

Record

bias

METAL

R31

Record

bias

Co(Cr0

)

R32

Record

bias

NORMAL

U101/U201

Bias

trap

Fig.

5-2

Adjustment

and

test

point

locations

V-66C

TEAC

test

tapes:

5-1

PLAYBACK

PERFORMANCE

Deck

settings:

TAPE

SELECTOR

sw:

METAL

DOLBY

IN/OUT

sw:

OUT

MTT-150:

For

Dolby

level

calibration

MTT-356:

For

playback

frequency

response

check

for

METAL,

(Cr0

)

MTT-501:

For

S/N

check

with

NORMAL

ITEM

SETTING

INPUT

SIGNAL

ADJUST

(or

CHECK)

MEASURING

POINT:

RESULT

REMARKS

REC/PLAY

head

azimuth

Connection:

Fig.

5-3

MTT-150

MTT-356

(12.5

kHz)

Check

Azimuth

screw

R/P

heads

(Fig.

54)

OUTPUT:

Phase:

within

45°

OUTPUT:

Max.

output

L-

R-ch's

(on

VTVM)

Refer

Fig.

5-5

Specified

output

level

MTT-150

R12/R22

Check

/TP

387.5

(-6

dB)

OUTPUT:

-3.5

±1

(461

581

mV)

Spec,

output

level

PEAK

LEVEL

DISPLAY

MTT-150

R14/R24

PEAK

LEVEL

DISPLAY

Frequency

response

TAPE

sw:

NORMAL

MTT-356

(315

kHz)

MTT-356

(10

kHz)

R11/R21

Check

OUTPUT:

Adjust

obtain

equal

output

315

and

kHz.

OUTPUT:

Fig.

5-6

OUTPUT:

kHz

should

approx.

higher

than

meas¬

ured

METAL

position.

Signal-to-noise

ratio

TAPE

sw:

NORMAL

Fully-erased

MTT-501

tape

(Use

bulk

tape

eraser)

Check

OUTPUT:

min.

Ratio

spec,

output

-3.5

noise)

Oscilloscope

OUTPUT

Voltmeter

Fig.

5-3

Test

setup

for

azimuth

check

Fig.

5-5

Confirming

phase

relationship

REC/PLAY

head

(dB)

“2

-4

-6

Fig.

5-4

Azimuth

screw

location

TAPE

SELECTOR:

METAL

tape:

MTT-356

125

315

Fig.

5-6

Playback

frequency

response

V-66C

5-2

MONITOR

PERFORMANCE

Deck

setting:

REC-PAUSE

mode

DOLBY

IN/OUT

sw.:

OUT

INPUT

sw.:

LINE

ITEM

SETTING

INPUT

SIGNAL

ADJUST

(or

CHECK)

MEASURING

POINT:

RESULT

REMARKS

Min.

input

level

RECORD

cont.:

Max.

INPUT

sw.:

MIC

INPUT

sw.:

LINE

MIC:

400

Hz/-67

(346

mV)

LINE

IN:

400

Hz/-19dB

(86.9

mV)

Check

OUTPUT:

-3.5

±3

(367

731

mV)

OUTPUT:

-3.5

±3

(367

731

mV)

MIC

min.

input

level

LINE

min.

input

level

Specified

LINE

input

level

LINE

IN:

400

Hz/-9

(275

mV)

RECORD

cont.

(L/R)

TP1/TP2

387.5

(-6

dB)

Specified

setting

RECORD

cont.

LINE

IN:

400

Hz/—9

(275

mV)

Check

OUTPUT:

-3.5

±1

(461

581

mV)

IMPORTANT:

not

change

the

setting

the

RECORD

controls

after

establishing

their

setting

above.

Headphone

output

level

Connection:

Fig.

5-7

LINE

IN:

400

Hz/-9

(275

mV)

Check

PHONES:

-17

±3

(77.5

155

mV)

ohm

load

PEAK

LEVEL

DISPLAY

LINE

IN:

400

Hz/-9

(275

mV)

Check

PEAK

LEVEL

DISPLAY

±1

Voltmeter

Fig.

5-7

Test

setup

for

headphone

check

MTT-5072

(METAL)

i_i_i-1-1-1-1-1

125

400

6,3k

10k

14k

(Hz)

Fig.

5-8

Overall

frequency

response

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