Onkyo TA-630D Manuale utente

SERIAL

NO.

3055

ONKYO.

SERVICE

MANUAL

y

STEREO

CASSETTE

TAPE

DECK

Model

TA-630D

JA‘6

30D

Stormo

Cessee

Pape

Ue

«

(XP

Tage

Censither

Memary

ACCU

Bias

efi

Chonast

Right

Shaan

Bally

NR

Lepast

Crt

mut

Level

Selector

:

ONKYO.

AUDIO

COMPONENTS

TA-6300

SPECIFICATIONS

Track

Format:

4

track,

2

channels

Erase

System:

AC

erase

Tape

Speed:

4.8

cm/sec

Wow

&

Flutter:

0.048%

(WRMS)

Fast

Forward

and

Rewind

Time:

90

sec

(C-60)

Frequency

Response:

30

~

15,000

Hz

Normal

tape

30

~

18,000

Hz

CrO,

tape

30

~

18,000

Hz

FeCr

tape

Signal-to-Noise

Ratio:

68

dB

(FeCr

tape;

Dolby

NR

in,

Dolby

Level)

Transistors:

40

SCR:

1

Ic:

4

Diodes:

25

diodes,

3

LED

Input

Terminals:

=

(

Microphone

jacks

2

Minimum

input

level

0.3

mV

Input

impedance

50

kQ

|opsmen

mic

impedance

200

2

~

50k

Line

in

jacks

2

Minimum

input

level

50

mV

Input

impedance

50

kn

DIN

Jacks

1

Minimum

input

level

0.1

mV/kQ

Input

impedance

5

kQ

FEATURES

High

Quality

Long

Life

“S

&

S’’

Sendust

Head

Onkyo’s

recently

developed

“S

&

S’’

Sendust

head

(made

from

a

highly

robust

silicon/iron/aluminum

alloy

of

out-

standing

magnetic

properties)

plays

a

very

big

role

in

achieving

the

high

quality

of

sound

reproduction

in

the

TA-630D.

Extended

frequency

response

(20

Hz

~

18,000

Hz

with

chrome

tapes)

and

an

exceptionally

wide

dynamic

range

make

your

recordings

sound

professional-like.

Built-in

Accu-Bias

Control

Optimum

bias

level

is

essential

for

really

top

grade

record-

ings.

But

since

the

magnetic

characteristerics

of

different

types

of

tape

vary

from

brand

to

brand,

the

conventional

bias

settings

are

only

approximates.

The

Onkyo

TA-630D

Accu-Bias

control

eliminates

the

“‘approx”,

and

ensures

you

of

superb

results

with

every

tape

used,

especially

in

the

high

frequency

region.

Dolby

NR

System

with

Switchable

MPX

Filter

Now

a

regular

feature

in

all

high

grade

cassette

tape

decks,

the

Dolby

NR

system

eliminates.

much

of

the

annoying

tape

hiss

from

your

recordings.

And

by

also

incorporating

the

Dolby

circuit

in

a

highly

reliable

single-chip

2-channel

monolithic

IC,

outstanding

channel

balance

is

achieved.

Furthermore,

a

built-in

MPX

filter

removes

the

pilot

signal

from

FM

broadcasts

for

brilliant

high

quality

recordings.

Built-in

Dolby

FM

Decorder

With

the

TA-630D

you

will

be

right

up

to

date

for

record-

ing

of

the

increasingly

popular

Dolby

FM

broadcasts.

No

need

for

an

extra

adaptor,

or

a

new

tuner/receiver

especially

designed

for

Dolby

FM.

The

improved

S/N

ratio

makes

noise

practically

non-existent.

Output

Jacks:

Line

out

jacks

2

Standard

output

level

0.775

V

(0

VU)

Optimum

load

impedance

over

50

k2

DIN

Jack

1

Standard

output

level

0.775

V

(0

VU)

Optimum

load

impedance

over

50k

Headphones

8

2

~

2002

PLL

Servo

DC

For

U.S.A.

and

Canada

—

AC

120V/60

Hz

For

other

countries

AC

110/120/220/240

V

50/60

Hz

or

240

V

50

Hz.

Power

Consumption:

13

W

Motor:

Power

Supply:

Dimensions:

418(W)

x

158(H)

x

297(D)

mm

16-1/2”

x

6-1/4”

x

12”

Weight:

6

kg

(13.2

Ibs)

Accessories:

Pin-Pin

type

connecting

cords...

2

*

Specifications

and

design

are

subject

to

modification

without

prior

notice

for

product

improvement.

*

Cabinet

Composition:

Embossed

viny!

over

metal.

Timer

Switch

for

Automatic

Recording

or

Morning

Alarm

By

simply

connecting

up

to

an

audio

timer,

the

TA-630D

will

record

those

“not-to-be-missed”

programs

even

in

your

absence.

Or

then

you

may

wish

to

substitute

your

morning

alarm

with

some

of

your

favorite

symphonies

and

recording

artists.

One-Touch

Rec

Muting

for

Clean

Editing

This

simple

switch

will

make

a

big

difference

to

your

tape

recording

and

editing.

Since

tape

transport

will

continue

in

a

“no-signal”

recording

mode,

the

interval

between

tunes

will

be

completely

silent.

Editing

out

of

commercials

will

also

be

swift

and

clean-cut.

Memory

Rewind

for

Rapid

Replay

After

presetting

the

tape

counter

and

memory

rewind

at

a

particular

section

of

the

tape,

a

simple

push

of

the

rewind

button

will

return

the

tape

back

to

that

point

quick-

ly

and

accurately,

saving

considerable

time

and

bother.

Separate

3-Way

Bias

and

Equalization

Selectors

The

TA-630D

is

designed

to

handle

all

major

types

of

cassette

tapes

available

on

the

market

today.

And

in

com-

bination

with

the

Accu-Bias

control,

optimum

bias

levels

are

assured

for

every

tape

used.

Full

Auto-Stop

Mechanism

.

Full

automatic

stop

at

the

end

of

the

tape

safeguards

both

tapes

and

tape

transport

from

undue

strain.

The

TA-630D

is

also

equipped

with

an

electronically

con-

trolled

full

auto-stop

mechanism

to

ensure

that

no

strain

whatsoever

is

applied

to

either

tape

or

tape

transport

system.

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TA-630D

EXPLODED

VIEW

EXPLODED

VIEW-PARTS

LIST

REF.

NO.

1

i)

Nn

&

W

PARTS

NO.

243095

243096

210045

16449542

210034

210035

25040047

25040054

25045046

5148031

27110066

27115027A

27115027B

27170023-1

280379

834130122

831430082

27210104

16449121

27267024A

27267025A

DESCRIPTION

NIND-0500S95,

VU

meter

NIND-0500S96,

VU

meter

0.1A,

6.3V,

VU

meter

lamp

NAPL-542,

Peak

indicator

p.c.b.

RMS-6V-50,

Accu.

indicator

lamp

RMS-6V-50,

Rec.

indicator

lamp

NLS-111-2715-L23P,

Power

switch

(N)

NLS-121-2725-L29,

Power

switch

(U)

HLJ0264-01-070,

Stereo

headphone

jack

N16RGC2KB25,

Accu.

control

variable

resistor

Front

bracket

Side

bracket

(N)

Side

bracket

(U)

Bottom

board

Leg

3STS+12BQ,

Tapping

screw

3STW+8

BQ(BC),

Tapping

screw

Front

panel

Front

panel

ass’y

Guide

(A)

Guide

(B)

REF.

NO.

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

NOTE:

PARTS

NO.

27267007

28198506

28198510

27300148

28320229

28320226

28320227

28320225A

28320228

28320256

28320224A

28320223A

28320222A

28320220A

28320221A

28184022

838440109

27300088

27300089

27300091B

870052

801173A

DESCRIPTION

Guide

(PUSH)

Facet

Window

for

counter

Knob,

lever

Knob

(R)

Knob

(L)

Knob

(OUT)

Knob,

push

Knob,

volume

Knob,

push

Knob,

lever

Knob,

lever

Knob,

lever

Knob,

lever

Top

cover

4TTB+10C

(BC)

Cassette

cover

Cassette

plate

Cover

Washer

Decorative

screw

N:

U.S.A.

model

U:

Universal

model

COMPONENT

LOCATION

TA-030D

(1)

(18)

(16)

(17)

(8)

@)

(2)

(12)

\

Go

|

O®

©

COMPONENT

LOCATION-PARTS

LIST

U.S.A.

model

Universal

model

REF.

PARTS

NO

DESCRIPTION

REF.

PARTS

NO

DESCRIPTI

NO. NO.

ON

1

16449538

NAAF-5

38,

Rec.

and

Pb.

amplifier

1

164495

38

NAAF-5

38,

Rec.

and

Pb.

amplifier

p.c.b.

2

16481569

NASW-469,

Mic.

jack

p.c.b.

2

16481569

NASW-469,

Mic.

jack

p.c.b.

3

16449543

NASW-543,

Memory

rewind

and

3

16449543

NASW-543,

Memory

rewind

and

accu.

switch

p.c.b.

accu.

switch

p.c.b.

4

16449540

NASW-540,

Dolby

FM

p.c.b.

4

NASW-540A,

Dolby

FM

p.c.b.

5

16449539

NAPL-5

39,

Dolby

NR

indicator

5

164495

39

NAPL-539,

Dolby

NR

indicator

p.c.b.

6

16449542

NAPL-542,

Peak

indicator

p.c.b.

6

16449542

NAPL-S42,

Peak

indicator

p.c.b.

7

210043

RMS-6V-50,

Deck

illumination

7

210043

RMS-6V-50,

Deck

illumination

lamp

8

3504012

UL125V103M,

UL

capacitor

8

3500052

PME271Y510CEE,

IS

capacitor

9

25040047

NLS111-2715-L23P,

Power

switch

9

25040054

NLS-121-2725-L29,

Power

switch

10

250008

ST-3312,

DIN

socket

(Lever

section)

11

25045025

NPJ-4PRBL03,

Input/output

25065064

Power

switch

(Wiring

section)

terminal

25065065

Power

switch

(Switch

section)

12

25045046

HLJ0264-01-070,

Stereo

10

250008

ST-3312,

DIN

socket

Headphone

jack

11

25045025

NPJ-4PRBLO3,

Input/output

13

253099

AS-UC3,

Power

supply

cord

terminal

—

14

230240

NPT-641D,

Power

transformer

12

25045046

HLJ0264-01-070,

Stereo

15

27120129B

Back

panel

headphone

jack

16

27180027

Spring

13

253083

Power

supply

cord

17

27140180A

Lever

(A)

14

2320242

NPT-641ADGO,

Power

18

27180022

Spring

transformer

19

244008

Deck

ass’y

15

27120140

»

~~

Back

panel

20

27300098

Shielded

plate

16

27180027

Spring

21

270025

SR-3P4,

Streinrelief

17

27140180A

Lever

(A)

18

27180022

Spring

19

244008

Deck

ass’y

20

27300098

Shielded

plate

25030018

PA-125,

3P

inlet

25050021

X-17240,

Voltage

selector

250227

PS

plug

252016

0.3AT,

AC

fuse

“A-630D

CIRCUIT

DESCRIPTION

gree?

4.7K

R638

638g

10KHz

OSC

C643]

R633

R635

“ae

Be

SO

gp

ere

ae

“tte

(1%

colt

|

cet2

Ky)

9.0C*

|

2001

|Q611]

3.5

R636

4

O€

Q612

Q613

R64?

6

3°

C646

oe

4

Ke

oo

SKS

BK

a

oN

SWITCHING

bone

ior

2

1.

Accurate

Bias

Circuit

Optimum

bias

current

varies

according

to

the

type

of

tape

being

employed.

Too

little

bias

current

will

result

in

increased

distortion,

while

too

much

bias

current

will

result

in

deterioration

of

the

frequency

response.

For

this

reason,

the

TA-630D

has

been

equipped

with

an

Accu

Bias

Control

(front

panel)

which

permits

optimum

bias

currents

to

be

set

accurately

for

different

tapes.

A

major

feature

of

the

TA-630D

is

the

Accu-Bias

circuit

which

permits

optimum

bias

adjustments

for

every

individual

cassette

tape

used,

thereby

ensuring

recordings

of

very

flat

frequency

responses.

1.

Insert

a

blank

tape

into

the

cassette

compartment,

and

set

the

Tape

Selectors

accordingly.

2.

For

Accu-Bias

adjustments,

the

Dolby

NR

switch

must

always

be

in

the

Out

position.

3.

When

starting

at

the

beginning

of

a

new

tape,

press

the

>

FF

key

to

advance

the

tape

by

20

~

30

in

the

Tape

Counter.

(This

will

ensure

optimum

bias

adjust-

ment).

|

4.

Press

the

m=

Pause

key,

and

then

the

@

Rec

and

>

Play

keys

to

prepare

the

deck

for

recording

mode.

.

Press

the

Memory

push-button

(On

position).

.

Reset

the

Tape

counter

to

000.

.

Press

the

Accu-Bias

push-button

(On

position).

The

Accu-indicator

lamp

will

consequently

light

up.

8.

Turn

the

Accu-Bias

Adjust

control

to

the

‘0’

(click-

stop)

position.

9.

Check

that

the

meter

pointers

deflect

across

to

around

the

0

VU

position.

Since

the

internal

oscillator

generates

alternate

400

Hz

and

10

kHz

(-—20

VU)

signals.

10.

Release

the

@#

@

Pause

key,

and

record

for

a

count

of

5

to

10.

11.

Press

the

<<

Rew

key.

The

tape

will

rewind

back

to

000

and

stop

automatically.

12.

Press

the

»

Play

key

to

playback

the

tape.

13.

Turn

the

Accu-Bias

Adjust

control

around

in

either

direction

to

find

the

position

where

the

meter

pointers

again

swing

back

and

forth

with

minimum

amplitude.

This

adjustment

will

now

correspond

to

the

optimum

bias

setting

for

that

particular

tape.

14.

Leaving

the

Accu-Bias

Adjust

control

in

the

adjusted

position,

press

the

Accu-Bias

push-button

a

second

time

to

disengage

the

Accu-Bias

circuit.

Now

proceed

with

the

regular

recording.

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NASW-543_-

During

recording:

Q611,

C610

~

C612,

R631,

R632

and

R634

constitute

a

10

kHz

CR

oscillator

circuit,

while

Q614,

C615

~

C617,

R644,

R645,

and

R647

constitute

a

400

Hz

oscillator

circuit.

By

using

a

non-stable

multi-

vibrator,

Q612

and

Q613

switch

the

10

kHz

and

400

Hz

signals

back

and

forth

at

approximately

2

second

intervals

(Q613

is

turned

OFF

when

Q612

is

turned

ON,

and

vice

versa).

When

Q612

is

turned

ON,

the

collector

voltage

drops,

resulting

in

Q615

being

cut

OFF.

And

since

Q613

has

already

been

cut

OFF,

Q616

will

be

turned

ON,

resulting

in

the

10

kHz

signal

passing

out

through

the

ACCU

OSC

output.

When

Q613

is

then

turned

ON,

Q612

is

cut

OFF

immediately,

resulting

in

the

400

Hz

signal

appearing

at

the

output.

These

output

signals

(alternate

10

kHz

and

400

Hz

signals

of

equal

levels)

are

then

passed

to

the

recording

amplifier

(Q111)

prior

to

being

recorded

on

tape.

During

playback:

The

recorded

signals

are

passed

via

a

playback

equalizer

amplifier,

a

preamplifier,

and

a

line

amplifier.

The

400

Hz

signal

is

passed

via

the

R623/C

629

low-pass

filter

and

Q609,

on

to

the

meter

drive

circuit.

The

10

kHz

signal,

on

the

other

hand,

is

passed

via

the

C632/R628

high-pass

filter

and

Q610,

on

to

the

Accu

Bias

Level

VR

(coupled

to

the

front

panel

Accu

Bias

Control)

before

being

mixed

in

the

meter

drive

circuit.

Then

optimum

bias

is

selected

for

that

particular

tape

by

adjust-

ing

the

Accu

Bias

Control

to

make

the

levels

of

the

400

Hz

and

10

kHz

signals

equal.

2.

Timer

Start

(1)

Set

the

time

of

the

timer

unit

plugged

into

the

AC

mains.

(2)

Press

the

record

key

and/or

the

play

key,

and

also

the

pause

key.

Then

turn

the

power

switch

on.

(3)

The

power

supply

will

thus

come

on

at

the

preset

time.

(4)

C701

will

consequently

be

changed

up

via

R702,

result-

ing

in

Q701

being

turned

ON

some

4

seconds

later.

(5)

Q702

will

therefore

turn

OFF.

(6)

The

signal

will

pass

via

S701

and

C702,

on

to

the

gate

of

Q704.

(7)

Q704

will

thus

be

turned

ON.

(8)

The

charge

on

C707

will

then

be

discharged

through

solenoid

and

Q704,

which

is

thereby

activated.

(9)

The

pause

key

is

releassed

by

this

solenoid

action,

resulting

in

the

start

of

the

recording,

or

playback,

mode.

es)

5703

5702

REW

COUNTER

Q701,970

945(K)

ene

=

;

tR702

R704

630K

4.7K

coy

7

|

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aa

(|

SUMER

START

(4

702"2,2/S0ILL)

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3.

Memory

Rewind

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

(10)

Press

the

reset

button

to

return

the

counter

to

000.

Then

press

the

memory

button.

Then

commence

operation

in

playback

or

record

modes,

but

not

rewind.

After

reaching

any

desired

position

on

the

tape,

press

the

rewind

key.

Since

the

deck

is

now

in

memory

rewind

mode,

S703

and

S704

will

be

ON.

And

when

the

tape

exceeds

the

original

starting

position

(counter

at

999)

the

counter

switch

$702

will

also

turn

ON.

The

voltage

at

point

(3)

in

the

circuit

diagram

will

then

increase

from

0

to

12V,

this

signal

being

applied

to

the

gate

of

Q704

via

R707

and

C703.

Q704

will

thus

be

turned

ON.

The

charge

on

C707

will

then

discharge

via

the

solenoid

and

Q704,

thereby

activating

the

solenoid.

The

depressed

keys

are

thus

relased

by

the

activated

solenoid.

Upon

completion

of

the

C707

discharge,

Q704

will

be

turned

OFF. C707

will

the

commence

to

charge

up

again

via

the

SOL701

solenoid

to

be

prepared

for

subsequent

operations.

MECHANICAL

OPERATIONS

1.

Drive

System

Play

Drive

Direct

flywheel

drive

via

flat

belt

passing

around

the

motor

pulley.

Take-up

reel

driven

by

an

angled

belt

passing

around

the

motor

pulley

and

a

tension

pulley.

Note

that

because

the

motor

and

tension

pulleys

rotate

in

opposite

directions,

the

belt

is

also

passed

around

an

intermediate

pulley.

FF

and

REW

Drive

:

The

flywheel

driven

by

a

flat

belt

passing

around

the

motor

pulley,

presses

against

an

idler

which

in

turn

drives

the

reel

bases.

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Q704

2SF656

____(03P05M)

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4.

Auto

Stop

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

Motor

Pulley

A

magnet

connected

to

a

counter,

which

in

turn

is

connected

to

the

take-up

reel

via

a

counter

belt,

is

rotated

during

tape

transport.

This

rotating

magnet

consequently

results

in

the

generation

of

square

wave

output

signals

from

the

Q703

Hall

IC

(4).

These

signals

are

rectified

by

D701

and

D702,

smoothed

by

C706,

and

then

applied

to

the

gate

of

Q704

(5)

which

is

thus

kept

at

a

negative

potential.

Once

the

tape

stops,

the

Q703

output

signals

will

cease.

C706

will

thus

be

charged

up

via

R714,

R713,

R710,

and

R709,

resulting

in

an

increase

in

voltage.

-

Q704

will

consequently

turn

ON

if

the

gate

(5)

potential

exceeds

0.6V

(approx.)

The

charge

on

C707

will

then

discharge

via

Q704

and

the

solenoid.

The

solenoid

is

thus

activated,

releasing

the

depressed

keys,

and

bringing

tape

transport

to

a

halt.

After

C707

has

completely

discharged,

Q704

will

turn

OFF.

C707

will

then

recommence

to

charge

up

again

via

the

R714

solenoid

in

order

to

be

ready

for

the

operation.

This

charge

up

time

is

approximately

3

seconds.

Tension

Pulley

Middle

Pulley

h

Reel,

supply

Reel,

take-up

Idler

lever

Flat

belt

TA-O300D

2.

Auto-Stop

When

tape

transport

stops,

the

counter

pulley

driven

by

a

round

belt

passing

over

the

reel

base,

and

the

12-polar

ring

magnet

connected

to

the

counter

pulley,

also

stop.

This

is

detected

by

the

Hall

IC,

resulting

in

the

activa-

tion

of

the

auto-stop

circuit.

The

solenoid

plunger

is

consequently

pulled

in,

thereby

moving

the

stop

plate,

and

releasing

the

depressed

keys.

3.

Memory

Rewind

When

the

counter

returns

to

999

during

rewind

mode,

and

the

solenoid

thereby

activated,

a

inserted

in

the

core

of

the

solenoid

acts

against

the

stop

plat,

there-

by

releasing

the

depressed

key.

The

position

of

this

is

determined

by

the

timer

lever.

Consequently,

only

the

stop

plate

is

moved.

Although

the

timer

lever

is

also

coupled

to

the

pause

key,

it

will

not

be

moved

unless

the

play

key

is

also

depressed.

The

timer

lever

is

held

in

check

by

the

selector

lever.

4.

Timer

Start

When

the

record

key

(and/or

play

key)

and

pause

key

are

pressed,

the

selector

lever

is

moved

forwards.

And

since

the

timer

lever

is

coupled

to

the

pause

key,

the

is

moved

away

from

the

stop

plate,

but

is

in

contact

with

the

operation

plate.

When

the

power

supply

is

turned

on,

and

the

solenoid

activated,

the

operation

plate

is

moved

across

to

the

lock

plate

(which

holds

the

pause

key

in

the

pause

position),

thereby

releasing

the

lock.

DISASSEMBLING

INSTRUCTIONS

1.

Removal

the

cassette

door

Press

the

STOP/EJECT

key

to

open

the

cassette

door,

then

lift

the

door

up

and

out

to

remove

as

illustrated

below.

2.

Removal

the

front

panel

Remove

four

screws

which

hold

the

top

cover

to

side

bracket

and

lift

the

top

cover

up.

Pull

out

the

input,

output

and

adjust

knobs.

Pull

out

six

lever

knobs.

Remove

six

screws

which

hold

the

front

panel

to

the

front

bracket.

Timer

lever

Selector

lever

Wg

Play

J

oon

ion

plate

Stop

Operation

plate

Stop

plate

biay

and

Pause

switch

to

ON

position.

3.

Removal

the

cassette

chassis

(1)

Remove

the

top

cover

and

front

panel.

(2)

Remove

a

screw

which

hold

the

shileded

plate

to

deck

bracket

(L).

(3)

Remove

four

screws

which

hold

the

deck

bracket

to

the

front

bracket.

|

(4)

Remove

two

screws

which

hold

the

deck

bracket

to

the

top

of

front

bracket.

(5)

Remove

the

spring

from

the

recording

lever

(A).

4.

Replacing

the

take-up

and

supply

reel

(1)

Remove

a

screw

which

hold

the

door

arm

(L)

to

the

cassette

chassis.

(2)

Remove

a

screw

which

hold

the

door

arm

(R)

to

the

cassette

chassis.

(3)

Remove

two

spring

from

the

door

arm

(R).

(4)

Remove

the

mylar

washer

to

remove

the

reel.

Note:

Once

the

mylar

washer

been

removed,

it

cannot

be

used

again.

Replace

with

a

new

washer.

5.

Replacing

the

motor

(1)

Remove

two

screws

which

hold

the

muting

switch

to

motor

bracket.

(2)

Remove

two

belts

from

the

motor

pulley

and

hang

to

pin.

(3)

Remove

two

screws

(B).

TA-0350D

6.

Replacing

the

belts

6-1.

Motor

belt

(motor

pulley—tension

pulley)

1)

Remove

two

screws

(A).

2)

Remove

the

belt

with

a

pair

of

tweezers.

6-2.

Counter

belt

1)

Remove

two

screws

which

hold

the

auto-stop

p.c.b.

to

counter

bracket.

2)

Remove

the

belt

from

the

counter

pulley.

3)

Open

the

cassette

door

and

remove

the

belt

from

the

take-up

reel

with

a

pair

of

tweezers.

6-3.

Motor

belt

(motor

pulley—flywheel)

1)

Remove

three

screws

(C).

2)

Remove

the

belt.

7.

Replacing

the

flywheel

(1)

Remove

two

screws

(A).

(2)

Remove

two

belts

from

the

motor

pulley

and

hang

the

belt

to

pin.

(3)

Remove

three

screws

(C).

(4)

Remove

the

flywheel.

MECHANISM

ADJUSTMENTS

1.

Door

speed

adjustment

_

@®

3

turms

Arm,

door

2.

Play

torque

adjustment

Strong

+10gr.—cm

Play

torque

adjustment

Adjust

the

torque

by

changing

the

position

of

arrow

mark.

Spring

Fast

Door

speed

adjustment

Adjust

the

door

speed

by

Late

bending

this

spring.

Current

consumption

(motor)

Mechanism

specifications

Playback:

80

—

120

mA

1)

Tape

speed:

4.8cm/sec.

(3kHz

+10Hz,

—OHz)

Recording:

80

—

120

mA

Use

a

standard

test

tape,

MTT-111

Fast

forward:

100

—

180

mA

(3kHz)

or

equipment.

Rewind:

105

—

180

mA

2)

Wow

and

Flutter:

Less

than

0.048%

(WRMS)

Auto-Stop

3)

Take-up

torque:

35

—

70

gr-cm

Playback-Stop:

90—110mA

4)

F.F.

torque:

55

—

130

gr-cm

Rewind-Stop:

280

—

380

mA

|

5)

Rewind

torque:

55

—

130

gr-cm

F.F.-Stop:

280

—

380

mA

6)

Rewind

time:

Less

than

90

sec.

(use

a

C-60

cassette

tape)

7)

Automatic

shut-off

time:

Less

than

5

sec.

8)

Timer

start

time:

3.5

sec.

—

7

sec.

PTA-630D

ELECTRICAL

ADJUSTMENT

PROCEDURES

PRECAUTIONS

1.

Tape

required:

3.

The

switches

and

controls

should

be

set

as

follows

unless

(1)

Blank

tape

:

otherwise

specified.

MAXELL

UD-XL/I

(Normal)

Accu

bias

adjust

control:

Center

UD-XL/II

(CrO2)

Accu

bias

switch:

Off

SONY

Duad

(FeCr)

Tape

selector

bias

switch:

Normal

Tape

selector

equalizer

switch:

Normal

(2)

Test

tape

Dolby

NR

switch:

Out

VICTOR

VTT-658

10

kHz,

—15

dB

Input

selector

switch:

Line

TEAC

MTT-111

3

kHz,

—10

dB

Output

level

control:

Maximum

MTT-150

—

Dolby

level

calibration

Input

level

control:

Maximum

tone.

FM

de-emphasis

switch:

25

psec.

2.

Instrument

required:

(1)

AC

VTVM

(2)

Frequency

counter

(3)

AF

oscillator

(4)

Attenuator

1.

PLAYBACK

MODE

ADJUSTMENT

1-4.

VU

meter

adjustment

1-1.

Head

azimuth

adjustment

PROCEDURES:

1)

Play

the

test

tape

MTT-150

back.

1)

Play

the

10

kHz

portion

of

the

test

tape

VTT-658

)

Aflests

to

che

Doloy

mark

Co

s3aB)

ae

back.

Adjust

the

head

azimuth

adjusting

screw

for

meter

maximum

V.T.V.M.

read.

2)

If

the

peak

output

reads

of

the

right

and

left

1-5.

Playback

frequency

response

adjustment

channels

are

different,

set

the

screw

to

obtain

the

Connect

the

AC

VTVM

to

the

TP-103

and

TP-104

test

5)

Mechanica

center

petween

the

Pee

bond

point.

Play

the

test

tape

VIT-658

back.

J

Ww

ne.

Adjust

the

voltage

to

150

mV

with

R133

and

R134.

VTVM

47

kQ

VTVM

=

Unit

Feo

j

a7

KO

mee

=

Line

Out

TP-103,

TP-104

1-2.

Tape

speed

adjustment

PROCEDURES:

}

JUSTMENT

Play

the

3

kHz

portion

of

the

test

tape

MTT-111

back,

2°

RECORDING

MODE

ADJU)

Adjust

the

tape

speed

adjusting

semi-fixed

resistor

in

2-1.

Bias

coil

trap

coil

adjustment

the

motor

for

3,000

to

3,010

Hz

counter

indication.

1)

Set

the

tape

deck

in

the

recording

mode

of

opera-

FREQUENCY

COUNTER

tion.

7

2)

Set

the

Bias

selector

switch

to

CrO,

position.

3)

Connect

the

AC

VTVM

to

TP-105

and

TP-106

test

point.

4)

Adjust

L111

and

L112

for

minimum

VTVM

read.

Line

Out

1-3.

Playback

output

adjustment

PROCEDURES:

1)

Play

the

test

tape

MTT-150

back,

adjust

R

135

and

R136

for

775

mV

V.T.V.

M.

read.

|

2)

Proceed

both

for

the

left

and

right

channels

in

the

same

manner.

VTVM

47

kQ

-_

Unit

OE

TP-103,

TP-104

10

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