Teac V-66C Bedienungsanleitung

TEAC.

SERVICE

MANUAL

V-66C

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

fevel:

-57

(1.09

mV)/10

kohms

Minimum

input

level:

-67

(346

»V)

LINE

IN:

Specified

input

level:

-9

(275

mV)/50

kohms

Minimum

input

level:

-19

(86.9

mV)

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

METAL:

3180us+

70us

(CrO,):

3180

us+

7O0us

NORMAL:

3180

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

AC,

50/60

Hz,

(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

Ibs.)

net

Dimensions

(11-1/4")

432

(17")

SERVICE

DATA

MECHANICAL

Tape

speed

deviation

3,000

+70

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

02-inch)

F.F.:

150

g-cm

(1.1

2.1

oz-inch)

REW:

150

g-cm

(1.1

2.1

0z-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,

(CrO,):

min.

NORMAL:

44 dB

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

2.2%

less

with

METAL/Co

(CrO,)

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

REMOVAL

EXTERNAL

COMPONENTS

Disassemble

number-order

Fig.

2-1

V-66C

PARTS

LOCATION

POWER

TRANSFORMER

CONTROL

PCB

R/P

AMPL

PCB

enemas

POWER

PCB

JOINT

PCB

SELECTOR

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-IN

SWITCH

SENSOR

ARM

SENSOR

ARM

sé

ren

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

PAUSE

SOLENOID

JOINT

PCB

PLAY

SOLENOID

Fig.

3-4

Transport

rear

view

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

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

0.3

—

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

02.)

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:

4.g-cm

(0.028

0.056

oz-inch)

F.F/REW:

150

g-cm

(1.1

2.1

02-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

controi

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

LINE

OUTPUT

Fig.

4-3

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

shown

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

sectipn,

and

play

it.

The

wow

and

flutter

should

not

than

0.25%

(RMS).

—

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

fight

grease

the

well

the

fly-

wheel

bearing.

capstan

flywheel

ass’y

capstan

shaft

V-66C

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.

100/120

220/240

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

Distortion

Analyzer

Attenuator

LINE

OUTPUT

OdB

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”

at-the

top

each

chart.

The

settings

apply

all

checks

for

the

specific

chart

unless

explicitly

stated

otherwise.

Osciltoscope

Voltmeter

1kHz

Filter

Fig.

5-1

Basic

test

setup

V-66C

vio1/70

Fig.

5-2

Adjustment

and

test

point

locations

V-66C

TEAC

test

tapes:

MTT-150:

For

Dolby

level

calibration

Deck

settings:

MTT-356:

For

playback

frequency

response

TAPE

SELECTOR

sw:

METAL

‘

check

for

METAL,

(CrO,

}

5-1

PLAYBACK

PERFORMANCE

DOLBY

NRIN/OUTsw:

OUT

MTT-501:

For

S/N

check

with

NORMAL

ADJUST

MEASURING

ITEM

SETTING

INPUT

SIGNAL

(or

CHECK)

POINT:

RESULT

REMARKS

OUTPUT:

Refer

MTT-150

Check

Phase:

within

45°

REC/PLAY

head

Aca

hte

giao

ieee

Nae

Sie

pine

azimuth

Connection:

Fig.

5-3

Azimuth

screw|

OUTPUT:

MTT-356

(12.5

kHz).

R/P

heads

Max,

output

L-

(Fig.

5-4)

R-ch's

(on

VTVM)

TP1/TP2

pizin22

387.5

(-6

dB)

Specified

output

~--

---

--e

----

level

ree

MENT

OUTPUT:

gare

cadres

Check

-3.5

peas

(461

581

mV)

PEAK

LEVEL

PEAK

LEVEL

MTT-150

R14/R24

DISPLAY

OdB

OUTPUT:

MTT-356

Adjust

obtain

(315

kHz)

R11/R21

equal

output

——

315

and

kHz.

MTT-356

Check

Cee

Frequency

ULL

tte

ket

tee

cen

response

OUTPUT:

kHz

should

‘

MTT-356

approx.

TAPE

sw:

NORMAL

(10

kHz)

Check

higher

than

meas-

ured

METAL

position.

‘

Fully-erased

MTT-501

Ratio

spec.

TAPE

sw:

NORMAL

tape

(Use

bulk

tape

Check

output

aus

—3.5

noise)

Oscilloscope

DECK

under

TEST

OUTPUT

Voltmeter

Fig.

5-3

Test

setup

for

azimuth

check

O°

(1N

PHASE)

45°

90°

Fig.

5-5

Confirming

phase

relationship

eraser)

azimuth

adjusting

screw

(dB)

180°

REC/PLAY

head

fixed

Fig.

5-4

Azimuth

screw

location

METAL

MTT-356

TAPE

SELECTOR:

tape:

«663

Fig.

5-6

Playback

frequency

response

125

315

10k

(Hz)

V-66C

Deck

setting:

DOLBY

IN/OUT

sw.:

5-2

MONITOR

PERFORMANCE

INPUT

sw.:

rat

INE

ADJUST

MEASURING

ITEM

SETTING

INPUT

SIGNAL

(or

CHECK)

POINT:

RESULT

Mic:

OUTPUT:

400

Hz/-67

~3.5

MIC

min.

input

RECORD

(346

nV)

(367

731

mV)

cont.:

Max.

LINE

IN:

papa

400

Hz/-19

-3.5

(86.9

mV)

(367

731

mV)

input

level

Min.

input

level

INPUT

sw.:

LINE

IN:

Specified

setting

400

Hz/-9

elaine

ap)

RECORD

(275

mv)

Specified

LINE

input

level

LINE

IN:

OUTPUT:

400

Hz/—9

-3.5

(275

mV)

(461

581

mV}

Headphone

LINE

IN:

PHONES:

out

level!

Connection:

Fig.

5-7

400

Hz/-9

-17

ohm

load

(275

mV)

(77.5

155

mV)

LINE

IN:

PEAK

LEVEL

;

PEAK

LEVEL

400

Hz/-9

DISPLAY

(275

mV)

0dB

Voltmeter

DECK

under

ead

PHONES

Fig.

5-7

Test

setup

for

headphone

check

MTT-5072

(METAL)

MTT-5061

(Co

(CrO,

))

DOLBY

B,C

TYPE

(dB)

MTT-501

(NORMAL)

DOLBY

TYPE

wae

125

400

6.3k

10k

14k

(Hz)

Fig.

5-8

Overall

frequency

response

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