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STEREO

TAPE

DECK

INSTRUCTION

MANUAL

®

Se

Meee

oe

Your

new

TEAC

equipment

has

been

manufactured

under

the

strictest

quality

control

procedures,

each

unit

has

been

thoroughly

checked

at

the

factory.

Should

any

damage

have

been

incurred

during

transit

or

should

you

have

any

doubts

as

to

its

performance,

contact

your

dealer

as

soon

as

possible.

Our

investigation

has

shown

that

approximately

40%

of

the

calls

for

service

imme-

diately

after

purchase

result

from

improper

operation

of

the

equipment.

Therefore

it

is

important

that

you

thoroughly

read

and

understand

this

manual

before

placing

the

unit

in

operation.

A

lack

of,

or

improper

cleaning

can

also

result

in

a

degradation

of

performance.

Careful

observation

of

the

cleaning

and

servicing

hints

contained

in

this

manual

will

contribute

to

a

lengthened

trouble

free

unit

life.

Please

consult

the

trouble

shooting

chart

before

seeking

service

as

most

common

problems

are

thro-

oughly

covered

by

this

chart.

Environmental

conditions

Although

this

deck

may

be

used

in

either

the

upright

or

horizontal

positions,

the

upright

position

is

preferred

from

the

point

of

more

efficient

ventilation.

Mounting

locations

to

be

avoided

are:

Locations

of

constant

high

temperature

Do

not

operate

this

unit

near

heating

appliances

or

on

top

of

an

amplifier

where

amplifier

heat

would

contribute

to

a

rise

in

temperature.

Do

not

place

the

unit

where

it

will

be

exposed

to

direct

summer

sunlight.

Temperature

extremes

wil]

not

only

cause

degradation

of

sound

quality

but

will

also

shorten

the

useful

operating

life

of

the

unit.

Avoid

temperatures

higher

than

100°F.

Locations

of

high

humidity

High

humidity

locations

will

shorten

equipment

life

due

to

corrosion

and

possible

fungus

growth

on

printed

circuit

boards.

Dusty

environments

Your

TEAC

equipment

is

a

precision

machine

and

as

such

should

be

protected

from

dust.

Operation

in

a

dusty

atmosphere

will

result

in

excessive

head

and

bearing

wear.

Dust

covers

are

available

from

your

TEAC

dealer

for

most

TEAC

components.

Your

tapes

should

also

be

kept

dust

free.

Fluctuation

of

the

supply

voltage

Should

you

be

in an

area

where

line

voltage

fluctuation

is

severe,

the

use

of

an

automatic

voltage

controller

is

recommended.

Service

Should

the

equipment

need

repair,

contact

the

dealer

where

it

was

purchased,

or

the

authorized

TEAC

Service

Center

nearest

you.

1)

The

Warranty

period

is

described

in

the

enclosed

warranty

card,

read

the

card

for

complete

details.

2)

For

repairs

after

expiration

of

the

warranty

period

a

service

charge

will

be

made

in

addition

to

the

price

of

repair

parts.

3)

If

only

repair

parts

are

required,

place

your

order

with

your

dealer,

nearest

TEAC

authorized

Service

Center.

Note

Although

the

unit

may

still

be

under

the

Warranty

period,

you

may

be

charged

for

repairs

made

necessary

by

misuse,

or

damage

incurred

as

a

result

of

improper

operation.

Contents

Function

of

the

operating

controls...

6...

.

eee

ee

eee

Connections

to

and

from

the

A-1250S)

21...

ee

ee

ee

ees

Rear

panel

connections

2.6...

es

General

recording

information

......-...0

026

cece

eee

ee

eee

Threading

the

tape

2...

eee

Basic

tape

deck

operation.

2...

ke

es

Playback

of

4

track

stereo

tape

6...

ee

Playback

of

4

track

mono

tape...

0.6...

.

eee

eee

General

information

and

precautions

at

recording

............--+----

Splicing

the

tape...

es

Expert

use

of

REC.

Bias,

Rec.

Eq.

and

PAUSE...

eee

ee

eee

ees

Recording

in

4

track

stereO

2...

ee

ee

ee

Recording

in

4

track

MONO

2.1...

ee

ees

-Recording

sound-on-sound

6...

ee

es

Reel

hight

adjustment

2...

0...

ee

ee

ee

eee

Automatic

reverse

and

repeat

playback

........-.--

eee

eee

eee

eee

=

Oiling?

«

c.38

Sec

Blak

at

Ale

toe

RE

ed

ed,

alte

a

ee

eS

Be

“@ANING,

cic

oe

sald

caidieye

PbO

bE

Se

Ce

ed

Sad

Cee

Thee

eda

ee

MST

ASIN

8!

es

“oie

Blake

M

gee

Gosh

G

Sue

ne

Eee

ee

Sh

nS

Si

ee

ah se

SS

Demagnetizing

2.0...

ee

eet

te

ne

eee

Changing

the

power

line

setting...

2.0...

-

eee

ee

eee

eee

Specifications

icsacica

clare

eee

eects

aay

apgtd

eS

oa

EEN

eee

Trouble

shooting

chart...

ee

eee

Optional

accessories...

6...

ee

eee

Mem!

se

scree

oh

SE

ee

earth

Ry

EE

farce

Ges

Se

os

aaa

a

ce

TES

toe

att

oi

Function

of

the

Operating

Controls

Index

counter

This

is

for

indexing

the

program

material

position

on

the

tape.

It

can

be

reset

to

zero

by

pressing

the

zero

reset

button

on

its

right.

Reel

turntable

7”

reel

is

the

maximum

that

can

be

used.

Quik-Lok

reel

holder

Reel

height

adjustment

Set

this

screwdriver

adjustment

for

optimum

reel

posi-

tion,

depending

upon

reel

thickness.

Tension

arm-reverse

sensing

post

Provides

proper

tape

tension

during

starts

and

stops,

and

compensates

for

the

changing

tape

winding

diameter.

Also

contains

the

sensing

post

for

the

automatic

reverse

function.

Manually

rotate

the

reels

clockwise

to

clear

the

sensing

foil

from

this

post

before

starting

the

reverse

Operation

manually

with

the

REV

(#8

)

button.

@

®

Guide

post-repeat

sensing

post

This

hard

stainless

steel

guide

post,

working

in

cornbina-

tion

with

the

tension

arm,

acts

as

a

mechanical

filter

to

absorb

vibrations

due

to

irregular

unwinding

of

tape

caused

by

sticking

to

the

supply

reel,

or

unstable

travel

of

tape

by

uneven

windings

on

the

reel.

The

guide

post

also

contains

the

sensing

contacts

to

provide

the

automatic

repeat

function.

Tape

speed

knob

Selects

tape

speed

at

recording

or

playback

.

H:

7%

ips

L:

3%

ips

Head

housing

Microphone

level

control

(MIC)

Line

input

level

control

(LINE)

ee

ce

og

ee

ee

M

1B

Output

level

(Playback

or

source)

control

(OUTPUT)

Controls

the

tape

playback

output

level

(volume).

*The

above

level

controls

with

asterisks

are

dual-con-

centric

knobs.

The

inner

knob

is

for

the

left

channel

(left

sound)

and

the

outer

knob

for

the

right

channel

(right

sound).

When

either

knob

is

turned,

the

other

will

rotate

with

it.

If

only

one

channel

should

be

adjusted,

the

other

knob

is

to

be

held

immovable.

Microphone

jacks

(MIC

IN)

L:

Left.

R:

Right

channel.

Input

impedance,

600

—

10,000

ohms

Headphone

jack

(PHONE)

An

822

(low

impedance

type)

is

recommended.

Monitor

select

switch

(MONITOR)

SOURCE:

This

position

allows

monitoring

of

the

sound,

before

being

recorded.

by

the

meter,

and

by

the

headphone

or

speaker.

TAPE:

This

position

is

used

for

playback

or

moni-

toring

of

the

tape

which

is

being

recorded.

Repeat

switch

ON:

Auto

repeat.

(See

page

18)

OFF:

No

repeat.

Recording

mode

switches

(REC

MODE)

These

are

for

putting

the

deck

in

the

recording

mode,

-

to

either

stereo

or

monaural.

LEFT:

Up

position

allows

recording

of

the

left

chan-

nel

program

(or

the

Ist

and

2nd

recording

for

mono).

Up

position

allows

recording

of

the

right

channel

program

(or

the

3rd

and

4th

record-

ing

for

mono).

RIGHT:

VU

(volume

units)

meters

(left

&

right

channel)

Provide

visual

display

of

recording

or

playback

signal

for

each

individual

channel,

REC

BIAS

HIGH:

This

position

is

for

recording

of

high

per-

formance

tapes

(Scotch

203,

etc.)

which

requires

a

larger

bias

than

regular

tapes

(Scotch

150,

etc.).

NORMAL:

This

position

is

for

recording

of

regular

tapes

(Scotch

150,

etc.).

REC

EQ

HIGH:

This

position

is

for

recording

of

high

per-

formance

tapes

(Scotch

203,

etc.)

which

requires

a

larger

bias

than

regular

tapes

(Scotch

150,

etc.).

NORMAL:

This

position

is

for

recording

of

regular

tapes

(Scotch

150,

etc.).

Capstan

Transports

tape

at

a

constant

speed

unaffected

by

changing

diameter

on

reel.

en

ee

a

®

Pinch

roller

Holds

tape

against

capstan

at

a

constant

pressure

to

prevent

wow,

speed

variation

and

tape

from

shifting

up

or

down

during

travel.

Shut-off

arm

This

arm

automatically

shuts

off

the

tape

transport

mechanism

when

tape

is

completely

rewound

or

if

the

tape

breaks

during

transport

(switch

will

operate

to

turn

off

power

when

this

arm

comes

to

rest

at

its

horizontal

position).

)

Tape

transport

buttons

With

the

Tape

Mode

Lever,

below

these

buttons,

at

PLAY

and

the

mom

depressed,

the

tape

will

be

trans-

ported

from

left

to

right,

depressing

the

m=B

button

will

cause

the

tape

to

be

played

back

from

right

to

left.

With

the

Tape

Mode

Lever

at

FAST,

depressing

either

the

meas

or

the

@E=B

button

will

cause

the

tape

to

be

wound

at

FAST

speed

in

the

selected

direction.

STOP

Button,

stops

the

tape

in

any

mode

of

operation,

(disengages

the

record

mode).

PAUSE:

Temporarily

stops

the

tape

in

the

recording

mode

without

disengaging

the

recording

mode.

During

playback

(Left

to

right

only)

you

are

able

to

convert

to

the

recording

mode

at

any

time

by

simulta-

neously

pressing

the

=m

and

the

record

button.

This

feature

is

most

usefull

for

editing

or

for

eliminating

unwanted

material.

NOTE:

Ifthe

m8

left

button

should

be

depressed

while

in

the

recording

mode,

the

recording

mode

will

be

automatically

disengaged

to

prevent

accidental

erasure

of

your

recording.

Power

switch

(POWER)

Level

meter

lamp

will

light

to

indicate

power

is

ON

when

this

button

is

depressed.

To

turn

OFF

power,

depress

again

and

release.

Recording

button

—

Record

indicating

lamp

(RECORD)

UN

aCe

Rear

Panel

Connections

Front

of

A-1250S

|

es

seed

fast

“PAUSE

PLAY

momtOn

wtrsat

ec

ues

aa

aan

meres

-

~

ome

pant

aS

see

-!

Microphone

(left

channel)

Microphone

(right

channel)

Stereo

headphone/8

ohms

()

FUSE

2A

@AC

POWER

IN

@)

OUTPUT

@IN

/

OUT

(DIN)

(5)

LINE

IN

Rear

of

A-1

2508

peed

Left

channel

Right

channel

Speaker

system

(left

channel)

(right

channel)

General

Recording

Information

Sound

recordings

are

made

in

a

strip

on

the

magnetic

surface

of

a

recording

tape.

This

magnetized

strip

is

called

the

“Track”.

The

full

tape

width

divided

by

two

is

called

a

“2”

track

recording,

and

the

full

tape

width

divided

into

quarters

is

called

a

“4”

track

recording.

“2”

Track

recording

2

Track

recording

is

mainly

employed

in

Radio

Stations

and

professional

recording

studios

for

stereo

recording,

in

this

case

both

tracks

are

recorded

simultaneously

and

in

the

same

direction.

2

track

recording

in

the

home

is

usually

done

one

track

at

a

time

and

is

played

back

monaurally.

om

isd

oO

fo)

x

Qa.

=

o

i

Qa

2

Track

recording

(

Monaural

)

“*4”

Track

recording

(Monaural)

In

this

mode,

each

of

the

four

tracks

is

recorded

individually.

At

the

end

of

the

tape

the

reels

are

interrecorded.

The

order

in

which

the

tracks

are

recorded

is

#1, #4,

#3

and

lastly

#2.

(Note)

With

tape

threaded

on

the

machine

the

tracks

are

numbered

]

through

4,

from

the

top

to

the

bottom,

viewed

-

from

the

base

side

of

the

tape.

Four

track

recording

gives

maximum

playback

time,

how-

ever,

the

benefits

of

stereo

reproduction

are

lost.

“4”

Track

recording

(Stereophonic)

In

this

mode

two

tracks

are

recorded

simultaneously,

on

the

first

pass

of

the

tape,

tracks

#1

and

#3

are

recorded.

The

left

and

right

reels

are

then

interchanged

and

tracks

#2

and

"#4

are

recorded.

The

left

channel

sound

will

be

on

tracks

#1

and

#4

and

the

right

channel

sound

will

be

on

tracks

#2

and

#3.

Four

track

recording

in

stereo

will

provide

the

best

possible

stereophonic

reproduction

and

is

the

most

widely

used

recording

method

today.

4

Track

recording

(

Stereophonic)

4

Track

recording

(

Stereophonic)

Playback

compatibility

A

four

track

stereo

tape

deck

can

play

back

both

4

track

and

2

track

tapes

and

from

the

point

of

compatibility

has

the

widest

possible

range

of

utilization.

When

playing

a

2

track

stereo

tape

on

a

4

track

recorder,

track

#1

will

be

completely

covered

by

the

head,

track

#2

however

will

be

slightly

off

alignment

but

stereo

can

still

be

enjoyed

by

compensating

for

the

slight

loss

of

#2

track

volume

with

the

volume

or

balance

controls.

On

the

other

hand

a

four

track

tape

cannot

be

played

back

on

a

two

track

(Monaural)

recorder

as

both

tracks

#1

and

#2

will

be

reproduced

together

resulting

in

mixed

unintelligible

sound.

Threading

the

Tape

TEAC

BSMrats3

AUTOMATIC

REVERSE

Coo

Oo

So

REEL

PLACEMENT

(either

reel)

1

Loosen

the

reel

shaft

tip

fully

CCW

(counter-clockwise).

See

(

Ref.

1)

in

the

picture

below.

2

Match

the

inner

3

index

tabs

(Ref.3)

and

the

outer

3

index

tabs

(Ref.2)

so

they

are

aligned.

This

is

done

by

turning

the

outer

3

index

tabs

slightly

CCW

until

the

inner

and

outer

index

tabs

are

in

a

straight

line

with

each

other.

FAST

PAUSE

PLAY

s--

RECORD

‘PowER

|

With

the

fingers

of

both

har.ds,

grasp

the

reel

and

place

the

center

hole

partially

over

the

reel

shaft

tip.

(Ref.

1)

Then

gently

rotate

the

reel

CCW

while

sliding

the

reel

fully

onto

the

turntable.

When

the

outer

3

index

tabs

(Ref.

2)

are

fully

visible

above

the

reel,

you

may

proceed

to

step

4.

Carefully

rotate

the

3

outer

index

tabs

(Ref.

2)

clockwise

until

they

stop

(approximately

60

degrees

or

1/6

of

a

revolution).

Turn

the

reel

shaft

tip

(Ref.

1)

clockwise

approximately

3

revolutions

until

it

is

finger-tip

tight.

Check

that

the

outer

index

tabs

are

still

in

the

clockwise

position,

about

mid-way

between

the

corresponding

slots

on

the

reel.

Repeat

the

above

steps

in

the

same

sequence

for

the

other

reel,

Pull

the

end

of

tape

with

your

fingers

and

thread

it

through

each

part

in

the

order

shown

below.

1)

Over

tension

arm.

2)

Lower

side

of

guide

post.

3)

Over

the

front

faces

of

the

head

assembly.

4)

Between

capstan

and

pinch

roller.

5)

Over

the

lower

side

of

the

tape

guide

on

the

shut

off

lever.

Secure

end

of

tape

onto

empty

reel.

Insert

the

end

of

the

tape

into

the

notch

on

the

reel

while

holding

it

against

the

reel

with

your

fingers

and

wind

tape

2

or

3

times

onto

the

ree]

hub.

While

holding

left

reel

stationary,

rotate

the

right

reel

counterclockwise

to

take’

up

tape

slack.

Tape

should

be

tight

enough

to

bring

right

shut

off

arm

to

its

upper

limit.

Playback

of

4

Track

Stereo

Basic

Tape

Deck

Operation

Tape

Setting

the

stereo

amplifier

;

.

When

the

Model

A-1250S

is

connected

to.

your

amplifier

BME

rAST

PAUSE

PLAY

(refer

to

page

7)

to

playback

tapes,

fully

retard

the

stereo

ia

yas

amplifier

volume

control

and

preset

the

switches

as

below:

—@

POWER

Mode*

selector:

To

STEREO

(or

to

LEFT

or

RIGHT

for

mono

playback)

Tape

monitor*

switch:

To

TAPE

*

These

designations

apply

to

TEAC

amplifiers.

Read

the

Operating

Manual

of

your

amplifier

or

inquire

of

your

dealer

if

it is

of

other

manufacture.

NOTE

1

—

For

playback

of

mono

tape,

switch

to

the

LEFT

channel

for

track

|

(1st

playback)

and

4

(2nd

playback),

and

the

RIGHT

Channel

for

track

3

(3rd

playback)

and

2

(4th

playback).

NOTE

2

—

For

setting

the

output

level,

adjust

the

stereo

amplifier

volume

control.

2

1

Set

TAPE

SPEED

knob

to

desired

tape

speed.

2

Depress

the

POWER

switch.

Tape

speed:

Set

to

“H”

(7%

ips)

or

“L”

(3%

ips),

to

match

FAST

PAUSE

PLAY

the

speed

at

which

the

tape

was

recorded.

_

4

oe

i.)

At

playback

of

a

high

level

recorded

tape,

adjust

VOLUM.

cowe

control

so

as

not

to

scale

out

the

level

meter

pointers.

3.

Thread

tape

on

the

deck.

4.

Set

Tape

Mode

Lever

to

PLAY

and

then

depress

the

c=

button.

The

tape

will

then

be

transported

from

left

to

right

at

the

previously

set

speed.

Once

the

C=-

button

is

depressed

the

deck

will

continue

to

operate

even

though

1

1

Teo)

|

ppe)

=]

TAPE)

the

button

is

released.

Depressing

the

<<

button

will

cause

the

tape

to

be

played

back

from

right

to

left.

RECORD

1

5

Depress

the

STOP

button

and

the

tape

will

stop

traveling.

1

Ser

MONO

area

TALE

6

Set

the

Tape

Mode

Lever

to

FAST,

depress

the

<>-

button

and

the

tape

will

be

wound

at

high

speed

(fast

forward).

OUTPUT

7

Depressing

the

<2

button

will fast

rewind

the

tape.

(in

the

above

operation,

always

depress

the

STOP

button

before

reversing

direction

of

tape

travel

or

tape

may

2

Adjust

playback

level

control

(OUTPUT)

knobs

(inner

break).

for

L;

outer

for

R)

to

the

desired

level.