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COCesoD-ss

OPERATOR’S

MANUAL

4-HEAD

3-MOTOR

AUTOMATIC

REVERSE

SURROUND

STEREO

ТАРЕ

DECK

WARNING:

To

prevent

fire

or

shock

hazard,

do

not

expose

this

appliance

to

rain

or

moisture.

MANUFACTURED

&

DISTRIBUTED

BY

AKAI

ELECTRIC

CO.,

LTD./AKAI

TRADING

CO.,

LTD./AKAI

AMERICA

LTD.

GX

(GLASS

&

CRYSTAL

FERRITE)

HEAD

Akai

has

equipped

this

model

with

its

new

and

amazing

Glass

&

Crystal

Ferrite

Recording

and

Playback

Heads

to

bring

you

unequalled

open

reel

high

fidelity

sound.

With

the

Glass

&

Crystal

Ferrite

Head,

superbly

wider

frequen-

cies

with

clear

highs

can

be

recorded

in

all

their

true

fidelity

with

low

noise

tape.

In

other

words,

with

the

GX

Head,

a

high

dynamic

range

and

excellent

signal-to-noise

ratio

are

achieved.

The

secret

of

this

success

lies

in

the

head

materials,

superior

processing

technique

and

the

focused-

field

recording

system.

The

core

of

this

quality

head

is

made

of

single

crystal

ferrite

and

is

mounted

and

set

in

glass.

The

superior

high

range

characteristics

are

contri-

butable

to

the

structure

of

the

head

gap

which

focuses

the

magnetic

field

into

a

sharp

oblong

radius.

This

focused

field

recording

system

minimizes

high

frequency

loss,

eliminating

undue

equalization

and

achieving

a

wider

dynamic

range.

4-CHANNEL

SURROUND

STEREO

What

is

all

the

talk

about

4-channel

stereo

and

what

are

the

advantages?

4-channel

stereo

is

equally

as

great

an

achieve-

ment

as

the

advancement

from

monaural

to

2-channel

stereo.

Just

as

2-channel

stereo

sound

reproduction

meant

the

exodus

of

flat

monaural

sound,

this

epoch-making

new

system

eliminates

the

inability

to

pick

up

and

reproduce

pure

concert

hall

sound.

New

4-channel

stereo

uses

4

signal

paths

or

sound

tracks

in

the

program

material

and

in

playback

approximates

the

complexity

of

the

sound

waves

which

reach

the

listener's

ear

when

attending

a

live

concert

hall

performance.

For

playback,

4

speakers

are

positioned

to

surround

the

listener.

The

sound

from

the

front

and

rear

speakers

give

the

listener

an

exciting

“sense

of

presence".

With

the

4

speakers

each

delivering

separate

sound,

you

are

literally

surrounded

with

a

wall

of

sound.

This

4-dimensional

sound

reproduction

makes

conventional

stereo

seem

empty

and

insufficient.

AKAI’s

"SURROUND

STEREO"

supplements

conven-

tional

stereo's

2

front

speakers

with

two

additional

rear

speakers

to

form

the

“2-2

system".

The

listener

is

sur-

rounded

by

two

sets

of

speakers

(left

&

right

front

and

left

&

right

rear).

This

arrangement

does

not

mean,

however,

that

simply adding

two

speakers

to

a

2-channel

system

is

all

that

is

necessary

for

4-channel

playback.

At

recording

time,

4

microphones

are

used

and

sound

is

picked

up

from 4

separate

places.

Four

separate

recordings

are

made

using

4

separate

channels

(four

tracks

in

one

direction).

This

4-channel

stereo

tape

feeds

into

4

pre-amplifiers

and

4

main

amplifiers

to

activate

a

4-speaker

system.

Thus,

at

playback

time,

sounds

from

separate

channels

are

emitted

from

each

speaker

providing

the

listener

with

a

feeling

that

he

is

listening

to

concert

hall

sound

from

the

best

seat

in

the

auditorium.

Model

GX-280D-SS

Stereo

Tape

Deck

is

a

compatible

4-channel/2-channel

model.

For

2-channel

operation,

only

the

front

channels

are

utilized.

For

exciting

4-channel

surround

stereo

playback,

a

4-

channel

external

power

amplifier

or

two

2-channel

ampli-

fiers

can

be

used

to

activate

a

4-speaker

system.

CEE, CSA,

UL,

and

LA

Standard

models

are

not

equipped

with

a

Voltage

S

tor

or

Cycle

Conversion

Switch.

Therefore,

voltage

and

cycle

conversion

is

not

necessary.

If

your

machine

corresponds

to

any

of

these

standards,

please

disregard

all

references

to

voltage

and

cycle

adjustment

throughout

this

manual.

CEE

Models

:

220V,

50Hz

CSA

Models

120V,

60Hz

UL

&

LA

Models:

120V,

60Hz

INDEX

(Glas

hn

Zoi

EEE

аа

4-Track

Recording/Playback

System

...............

4-Channel

Surround

Stereo

Recording/Playback

..

. .

2-Channel

Stereo

Recording/Playback

............

Tape

Loading,

socs

а

ee

ee

Gases

w

sh

oes

Tape

Selector

Switch

......

eee

Tape

Speed

Selection

socrus

ee

Direct

Function

Change

Control

System

.

Fast

Forward

&

Rewind

...........

ays

Automatic

Stop

&

Shut-Off

.

css

cee

coe

or

ees

How

To

Use

The

Pause

Button

,..................

How

To

Use

The

Index

Counter

..................

Remote

Control

о

uu

a

zoe

IM

eaten

dy

NUR

|

Operating

Instructions

...........

Connections

For

Playback

.

.

52.2

ose

sawa

ame

Connections

For

Recording

......

S

aa

4-Channel

Surround

Stereo

Playback

.............

2-Channel

Stereo

Playback

Automatic

&

Manual

Reverse

Playback

.............

4-Channel

Stereo

Recording

2-Channel

Stereo

Recording

10

Sound-On-Sound

Recording

aem

1D

Sound

Mixing

..........

x

12

N

о

со

чо

tn

Un

tn

tn

+

+

+

RR

+

+ +

+

tO

10

Tape

Erasing

.........

12

Tape

Splicing

&

Editing

.

8

13

Maintenance

.................................

13

Heads

Should

Always

Be

Kept

Clean...........--

13

Pinch

Wheel

&

Capstan

Cleaning

................

13

Head

Demagnetizing.

.

2...

оноо

ван

Cuna

t'a

eee

w

Voltage

&

Cycle

Conversion

Technical

Dalasa

o

xg

onset.

жал

SNO

Standard

Accessories

..

.

Trouble

Shooting

Chart

а

dives

es

tunia

ans

CONTROLS

12.

13.

14.

20.

21.

22:

23.

24.

25.

26.

27.

28.

29.

INDEX

COUNTER

&

RESET

BUTTON

With

Reset

Button,

set

Index

Counter

to

'*0000"

before

beginning

operation.

SUPPLY

REEL

TABLE

REEL

RETAINER

Built-in

Reel

Retainer

locks

reel

firmly

into

place.

HEAD

COVER

Houses

Full

Track

Erase,

Half

Track

Erase,

and

GX

Recording

and

Playback

Heads.

TAPE

TENSION

LEVER

TAPE

GUIDE/SENSING

PIN

.

PAUSE

BUTTON

Convenient

for

temporarily

suspending

tape

movement

during

operation.

Lock

into

pause

position

by

turning

to

right.

.

AUTOMATIC

SHUT-OFF

BUTTON

Linked

to

Automatic

Shut-Off

Lever.

Refer

to

page

4.

POWER

SWITCH

SPEED

SELECTOR

SWITCHES

(7-1/2

and

3-3/4

ips)

MONITOR

SWITCH

To

monitor

program

source,

depress

to

SOURCE

(in)

position,

To

monitor

recorded

signals

or

for

playback,

set

to

TAPE

(out)

position.

STEREO

SELECTOR

For

2-channel

operation,

depress

to

“2-СН”

position.

For

4-channel

operation,

set

to

“4-CH”

position,

VU

METER

(Left

front

channel)

Indicates

left

Front

Channel

recording/playback

level.

VU

METER

(Right

front

channel)

Indicates

right

Front

Channel

recording/playback

level.

MICROPHONE

RECORDING

LEVEL

CONTROL

(Left

front

channel)

Adjust

left

Front

Channel

microphone

input

level

while

observing

left

Front

VU

Meter.

FRONT

CHANNEL

MICROPHONE

JACKS

For

front

channel

microphone

recording.

.

LINE

RECORDING

LEVEL

CONTROL

(Left

front

channel)

Adjust

left

Front

Channel

line

input

level

while

observing

left

Front

VU

Meter.

AE

ROPHOBB

RECORDING

LEVEL

CONTROL

(Right

front

channel)

Adjust

right

Front

Channel

microphone

input

level

while

observing

right

Front

VU

Meter.

LINE

RECORDING

LEVEL

CONTROL

(Right

front

channel)

Adjust

right

Front

Channel

line

input

level

while

observing

right

Front

VU

Meter.

TAPE

SELECTOR

SWITCH

Depress

when

using

AKAI

Super

Range

Tape

or

other

make

low

noise

tapes.

CAPSTAN

TAKE-UP

REEL

TABLE

REEL

RETAINER

PINCH

WHEEL

Presses

against

Capstan

to

transport

tape.

TAPE

GUIDE/SENSING

PIN

AUTOMATIC

SHUT-OFF

LEVER

For

automatic

stop-shut-off,

refer

to

page

4

.

RECORD

SAFETY

BUTTON

While

holding

this

button

at

depressed

position,

depress

FWD

Button

to

effect

recording

mode.

REWIND

BUTTON

For

rewinding

tape

at

fast

speed.

REVERSE

BUTTON

For

effecting

manual

reverse

playback.

30.

3.

=

32.

33.

34.

35.

36.

37.

38.

39.

40.

41.

42.

43.

44.

45.

46.

47.

48.

49.

50.

51.

52.

STOP

BUTTON

Depress

to

stop

tape

travel.

FORWARD

BUTTON

Advances

tape

for

recording

or

playback.

FAST

FORWARD

BUTTON

Advances

tape

at

high

speed.

VU

METER

(Left

rear

channel)

Indicates

left

Rear

Channel

recording/playbzck

level.

VU

METER

(Right

rear

channel)

Indicates

right

Rear

Channel

recording/playback

level.

LINE

RECORDING

LEVEL

CONTROL

(Right

rear

channel)

Adjust

right

Rear

Channel

line

input

level

while

observing

right

Rear

VU

Meter.

MICROPHONE

RECORDING

LEVEL

CONTROL

(Right

rear

channel)

Adjust

right

Rear

Channel

microphone

input

level

while

observing

right

Rear

VU

Meter.

REAR

CHANNEL

MICROPHONE

JACKS

For

Rear

Channel

microphone

recording.

LINE

RECORDING

LEVEL

CONTROL

(Left

rear

channel)

Adjust

left

Rear

Channel

line

input

level

while

observing

left

Rear

VU

Meter.

MICROPHONE

RECORDING

LEVEL

CONTROL

(Left

rear

channel)

Adjust

left

Rear

Channel

microphone

input

level

while

observ-

ingleft

Rear

VU

Meter.

HEADPHONE

JACKS

(Front

and

Rear

channel)

REMOTE

CONTROL

SOCKET

For

connection

of

AKAI

Remote

Control

unit

RC-16

(optional

accessory

).

UNIVERSAL

VOLTAGE

SELECTOR

&

FUSE POST

For

adjusting

voltage

input,

refer

to

page

11.

DIN

JACK

INPUT

SELECTOR

SWITCH

When

using

Din

Jack

connection,

if

output

level

of

external

amplifier

is

high,

set

to

High

position,

and

if

low,

set

to

Low

position.

DIN

JACK

(Rear

channel)

Enables

inter-connection

with

an

external

amplifier

by

use

of

a

single

DIN

connection

cord.

REAR

CHANNEL

LINE

OUTPUT

JACKS

Connects

to

Tape

Inputs

of

external

amplifier.

REAR

CHANNEL

LINE

INPUT

JACK

Connects

to

outputs

of

external

source.

CYCLE

CONVERSION

SWITCH

Set

to

50

or

60

Hz

to

correspond

with

area

power

source.

A.C.

CORD

FRONT

CHANNEL

LINE

INPUT

JACKS

Connects

to

outputs

of

external

source.

FRONT

CHANNEL

LINE

OUTPUT

JACKS

Connects

to

tape

inputs

of

external

amplifier.

DIN

JACK

(Front

channel)

Enables

inter-connection

with

external

amplifier

by

use

of

a

single

DIN

connection

cord.

SOUND-ON-SOUND

SWITCH

4-track

4-channel

stereo

1

——

Front

CH

left

1

—

Rear

CH

left

3

—

Front

CH

right

4

+

№

Rear

CH

right

4-track

2-channel

stereo

1

pe

Left

CH

2

[

«—

Right

CH

SideA

©

mne

|

Right

CH

-4—

sides

—

4

HEEP

TAPE

SELECTOR

SWITCH

Depress

Tape

Selector

Switch

when

using

Akai

S.R.T.

(super

range

tape)

or

other

make

low

noise

tape.

This

feature

brings

out

the

maximum

response

of

low

noise

tape

and

works

to

change

the

recording

equalization

according

to

the

tape.

Although

the

GX-280D-SS

exhibits

a

good

frequency

response

with

regular

tape,

this

is

further

extended

with

low

noise

tape.

TAPE

SPEED

SELECTION

This

model

operates

on

two

tape

speeds;

i.e.,

7-1/2

and

3-3/4

ips.

Simply

depress

7-1/2

or

3-3/4

Tape

Speed

Selector

Switch

according

to

desired

speed.

Recording

time

using

an

1800

ft.

tape

:

(2-channel

stereo)

3

hrs.

at

3-

3/4ips

and

1-1/2

hrs.

at

7-1/2ips.

(4-channel

stereo)

1-1/2

hrs.

at

3-3/4

ips.

and

3/4

hrs.

at

7-1/2

ips.

4-TRACK

RECORDING/PLAYBACK

SYSTEM

The

GX-280D-SS

employs

a

4-track

system

which

can

be

used

for

either

4-channel

or

2-channel

stereo

recording

and

playback.

Select

system

with

the

Stereo

Selector

on

front

panel.

4-CHANNEL

STEREO

RECORDING/PLAYBACK

4-channel

stereo

recording

and

playback

requires

the

simul-

taneous

use

of

all

4-tracks

in

one

direction.

Set

Stereo

Selector

to

4-CH

position

and

use

front

and

rear

channel

controls.

2-CHANNEL

STEREO

RECORDING/PLAYBACK

2-channel

stereo

recording

and

playback

requires

the

simultaneous

use

of

two

tracks.

Set

Stereo

Selector

to

2-CH

position

and

use

only

front

channel

controls.

The

first

stereo

recording

(playback)

takes

place

on

tracks

1

and

3

and

the

second

on

tracks

2

and

4

after

the

reels

have

been

inverted.

TAPE

LOADING

1.

Place

a

full

reel

of

tape

on

the

Supply

Reel

Table

and

an

empty

reel

on

the

Take-Up

Reel

Table.

2.

Lock

reel

into

place

pulling

tip

of

retainer

on

reel

shaft

outward

and

turning

to

left

or

right.

3.

Unwind

about

a

75

cm

length

of

tape

from

the

supply

reel

and

then

thread

tape

properly

as

shown

by

the

dotted

lines

in

the

figure.

4.

Insert

end

of

tape

in

slot

of

empty

reel

and

wind

tape

around

the

reel

hub

two

or

three

times.

5.

Continue

winding

tape

onto

take-up

reel

until

all

tape

slack

has

been

taken

up.

DIRECT

FUNCTION

CHANGE

CONTROL

SYSTEM

A

completely

automatic

function

change

control

system

is

employed

in

this

model

for

easy

and

speedy

change

of

operating

modes.

The

necessity

of

depressing

the

Stop

Button

before

changing

modes

is

eliminated.

FAST

FORWARD

&

REWIND

To

effect

fast

forward

or

rewind,

depress

Fast

Forward

or

Rewind

Button

on

control

panel.

Use

Stop

Button

to

stop

fast

forward

or

rewind

operation.

AUTOMATIC

STOP

&

SHUT-OFF

When

the

tape

comes

to

the

end

or

is

accidentally

broken,

the

Automatic

Shut-Off

Lever

is

released

and

reel

move-

ment

is

stopped.

If

the

Automatic

Shut-Off

Button

is

depressed,

when

the

Shut-Off

Lever

is

released,

the

power

of

the

entire

unit

is

cut

off.

OPERATING

INSTRUCTIONS

*

Your

machine

requires

constant

voltage

for

optimum

performance.

The

GX-280DSS

is

equipped

with

a

Universal

Voltage

Selector

and

Cycle

Conversion

Switch.

Voltage

and

Cycles

are

preset

at

the

factory

according

to

destination,

However,

you

are

requested

to

confirm

setting

before

attempting

operation

and

if

necessary,

readjust

as

indicated

on

page

14 of

this

manual,

If

your

local

power

source

is

unknown,

please

ask

your

nearest

electric

company

for

correct

voltage

and

cycles,

As

dirty

heads

and

magnetized

heads

become

the

source

of

loss

of

sound,

distortion,

sound

drop-out,

and

other

recording

and

playback

failures,

the

heads

must

be

kept

clean

and

demagnetized

at

al!

times.

Do

not

place

anything

on

top

of

your

machine

which

will

obstruct

the

ventilator.

Place

machine

on

a

flat

horizontal

surface

and

operate

HOW

TO

USE

THE

PAUSE

BUTTON

For

momentarily

suspending

tape

travel

during

recording

or

playback,

depress

Pause

Button.

Pause

control

is

especially

useful

for

editing

tapes.

Simply

depress

when

certain

portions

of

the

program

are

not

desired.

After

being

de-

pressed,

the

Pause

Button

can

be

locked

into

position

by

turning

in

direction

of

arrow.

*

Pause

control

is

also

useful

for

starting

recording

smoothly

and

quickly.

Depress

Pause

Button

and

set

recorder

to

recording

mode.

Depress

SOURCE

Monitor

Switch

and

adjust

and

balance

recording

input

level

while

observing

VU

Meters.

When

an

optimum

level

has

been

determined,

simply

release

Pause

Button

and

begin

recording.

*

Pause

control

does

not

function

during

fast

forward

or

rewind

mode.

HOW

TO

USE

THE

INDEX

COUNTER

Model

GX-280D-SS

is

equipped

with

a

handy

4-digit

Index

Counter

for

easy

indexing.

This

provides

an

easy

reference

for

quickly

locating

positions

on

the

tape.

For

resetting,

simply

depress

Reset

Button.

REMOTE

CONTROL

All

operating

functions

of

the

GX-280D-SS

can

be

remote

controlled

with

Akai

Remote

Control

unit

RC-16

(optional

accessory).

Plug

into

socket

provided

on

rear

panel.

either

horizontally

or

vertically.

*

If

the

sound

sources

are

so

far

away

from

the

microphones

that

the

recording

level

controls

must

be

turned

up

to

maximum,

some

hum

or

noise

will

inevitably

be

recorded.

A

test

recording

is

recom-

mended

before

attempting

a

final

recording.

Use

good

quality

tapes.

New

tape

gives

best

results.

As

tapes

which

have

not

been

used

fora

period

of

time

may

have

become

sticky,

run

once

before

using.

*

Always

store

tapes

in

a

cool,

dry

place.

Should

there

be

a

problem

with

your

machine,

write

down

the

model

and

serial

numbers

and

all

pertinent

data

regarding

warranty

coverage

as

well

as

a

clear

description

of

the

existing

trouble

and

contact

your

nearest

authorized

Akai

Service

Station

or

the

Service

Department

of

Akai

Electric

Company,

Tokyo,

Japan.

CONNECTIONS

FOR

PLAYBACK

CONNECTIONS

FOR

RECORDING

The

Din

Jacks

at

the

rear

of

the

recorder

are

used

for

inter-connecting

the

GX-280D-SS

with

an

external

amplifier.

This

system

enables

easy

recording

or

play-

back

through

an

external

amplifier

as

the

complex

connection

or

disconnection

of

several

separate

plugs

is

not

necessary.

e

TUNER

AMPLIFIER

г

AKAI

ELECTRIC

CO.,LTD.

MADE

IN

JAPAN

AKA!

ELECTRIC

CO.,LTD

MADE

IN

JAPAN

|

AMPLIFIER

ü

©

—PHONO

o

r

PHONO-

>

|

——

AUX

RIGHT

LEFT

Y

TAPE

2

REC

DIN

PR

E

©

GOlrrow

REAR

J

The

connections

at

left

are

for

4-chan-

nel

surround

stereo

playback.

When

these

connections

are

made

and

2-channel

stereo

playback

is

desired,

depress

front

panel

Stereo

Selector

to

2-CH

position.

^

If

exclusive

2-channel

playback

is

2-channel

stereo

magnetic

4-channel

stereo

tape

deck

2-channel

stereo

crystal

or

É

cartridge

turntable.

If

a

or

recorder.

ceramic

cartridge

turn-

desired,

use

front

channel

connections

4-channel

stereo

magnetic

When

connections:

for

table.

only.

cartridge

turntable

with

4-channel

stereo

recording

2-channel

stereo

crystal

or

built-in

4-channel

playback

is

made

and

2-channel

ceramic

cartridge

turntable.

unit

is

used,

connect

to

the

stereo

recording

is

desired,

Connect

to

front

channel

respective

front

and

rear

depress

Stereo

Selector

to

input

jacks

of

the

GX-

channel

input

jacks

of

the

2-CH

position.

For

ex-

280D-SS.

GX-280D-SS.

clusive

2-channel

stereo

recording,

use

front

chan-

nel

connections

only.

4-CHANNEL

SURROUND

STEREO

PLAYBACK

Connect

a

4-channel

stereo

amplifier/speaker

system

to

the

front

and

rear

channel

Output

Jacks

as

shown

in

CONNECTIONS

FOR

PLAYBACK.

If

a

4-channel

stereo

amplifier

is

not

available,

connect

a

2-channel

stereo

amplifier

each

to

the

front

and

rear

channel

jacks

respectively.

*

Please

read

OPERATING

INSTRUCTIONS

carefully

prior

to

operation,

Load

a

pre-recorded

tape

following

the

instructions

on

page

4.

*

Connect

power

cord

and

turn

on

Power

Switch

(A).

Set

Stereo

Selector

(B)

to

4-CH

position.

Select

tape

speed

with

Tape

Speed

Selector

Switch

(C).

Set

Monitor

Switch

(D)

to

TAPE

positon.

Depress

Forward

Button

(E)

to

begin

playback.

Adjust

external

amplifier

controls.

To

stop

tape

travel

during

playback,

depress

Stop

Button

(F).

nmonbBRenc

2-CHANNEL

STEREO

PLAYBACK

*

Connect

a

2-channel

s

eo

amplifier/speaker

system

to

the

front

channel

Output

Jack:

shown

in

CONNECTIONS

FOR

PLAY-

BACK.

In

case

a

4-channel

stereo

amplifier

is

used,

utilize

only

the

front

channel

connections.

*

Please

read

OPERATING

INSTRUCTIONS

carefully

prior

to

operation,

Load

a

pre-recorded

tape

following

the

instructions

on

page

4.

*

1.

Connect

power

cord

and

turn

on

Power

Switch

(A).

2.

SetStereo

Selector

(B)

to

2-CH

position.

3.

Select

tape

speed

with

Tape

Speed

Selector

Switch

(C).

4.

Set

Monitor

Switch

(D)

to

TAPE

position.

5.

Depress

Forward

Button

(E)

to

begin

playback.

6.

Adjust

external

amplifier

controls.

7.

'To

stop

tape

travel

during

playback

depress

Stop

Button

(F).

8.

Depress

Reverse

Button

(G)

for

playback

of

reverse

side

or

invert

reels.

Sensing

Pin

AUTOMATIC

&

MANUAL

REVERSE

PLAYBACK

For

automatic

reverse

playback,

affix

about

a

2.5

cm

(1")

long

piece

of

sensing

foil

to

the

outside

of

the

tape

at

desired

reversing

point.

If

continuous

reverse

between

two

points

is

desired,

affix

another

piece

of

sensing

tape

to

the

inside

of

the

tape

at

desired

reversing

point.

As

the

foil

passes

the

sensing

pole(s)

reverse

is

effected.

Model

GX-280D-SS

is

also

equipped

with

a

Manual

Reverse

Button

for

manual

reverse

playback.

To

effect

manual

reverse,

depress

Manual

Reverse

Button

on

control

panel.

4-CHANNEL

AUTOMATIC

REWIND/SHUT-OFF

Apply

a

piece

of

sensing

foil

to

the

outside

of

the

tape

at

desired

reversing

point

and

depress

Shut-Off

Button.

When

the

tape

reaches

the

place

at

which

sensing

foil

is

affixed,

it

will

automatically

rewind.

After

the

tape

has

been

re-

wound,

the

shut-off

mechanism

will

be

activated

to

cut

off

the

power

of

the

unit.

4-CHANNEL

AUTOMATIC

REWIND/

CONTINUOUS

PLAYBACK

Apply

sensing

foil

to

the

outside

of

the

tape

for

normal

playback

to

rewind

and

inside

for

rewind

to

repeat

at

desired

repeating

point,

and

confirm

that

Shut-Off

Button

is

at

OUT

position.

When

the

tape

reaches

the

place

at

which

sensing

foil

is

affixed,

it

will

automatically

rewind

to

starting

position

(point

at

which

sensing

tape

is

applied)

and

playback

will

continue.

The

tape

will

be

played

and

rewound

over

and

over

until

the

unit

is

manually

turned

off.

2-CHANNEL

AUTOMATIC

REVERSE

PLAYBACK/SHUT-OFF

Apply

a

piece

of

sensing

foil

to

the

outside

of

the

tape

at

desired

reversing

point

and

depress

Shut-Off

Button.

When

the

tape

reaches

the

place

at

which

sensing

foil

is

affixed,

reverse

playback

is

effected.

At

the

end

of

reverse

playback,

the

shut-off

mechanism

will

be

activated

to

cut

off

the

power

of

the

unit.

2-CHANNEL

AUTOMATIC

CONTINUOUS

PLAYBACK

Apply

sensing

foil

to

the

outside

of

the

tape

for

normal

to

reverse

playback

and

inside

for

reverse

to

normal

playback

at

desired

reversing

points,

and

confirm

that

the

Shut-Off

Button

is

at

OUT

position.

When

the

tape

reaches

the

place

at

which

the

sensing

foil

is

affixed,

reverse

playback

will

be

effected.

At

the

end

of

reverse

playback

(point

at

which

sensing

foil

is

applied)

palyback

will

continue

in

the

opposite

direction,

thus

providing

continuous

playback

in

both

directions.

4-CHANNEL

STEREO

RECORDING

*

Connect

desired

4-channel

program

source

to

the

appropriate

inputs

of

the

GX-280D-SS

as

shown

in

CONNECTIONS

FOR

RECORDING.

*

Please

read

OPERATING

INSTRUCTIONS

carefully

prior

to

operation.

Load

tape

following

instructions

on

page

4.

*

1.

Connect

power

cord

and

turn

on

Power

Switch

(A).

2.

Set

Stereo

Selector

(B)

to

4-CH

position.

3.

Select

tape

speed

with

Tape

Speed

Selector

Switch

(C).

4.

With

Reset

Button

(D),

set

Index

Counter

to

“0000”.

This

Index

Counter

furnishes

a

quick

reference

for

locating

positions

on

the

tape.

5.

Set

Monitor

Switch

(E)

to

SOURCE

position.

6.

Adjust

and

balance

Recording

Level

Controls

(front

and

rear

channel

left

and

right)

(F)

while

observing

corresponding

VU

Meters.

Normal

recording

level

should

not

exceed

“0”

VU.

7.

When

an

optimum

level

has

been

determined,

while

holding

Record

Safety

Button

(G)

at

depressed

position,

depress

Forward

Button

to

begin

recording.

8.

To

stop tape

travel

during

recording,

depress

Stop

Button

(H).

2-CHANNEL

STEREO

RECORDING

*

Connect

desired

2-channel

program

source

to

the

appropriate

inputs

of

the

GX-280D-SS

as

shown

in

CONNECTIONS

FOR

RECORDING.

*

Please

read

OPERATING

INSTRUCTIONS

carefully

prior

to

operation.

*

Load

tape

following

instructions

on

page

4.

Connect

power

cord

and

turn

on

Power

Switch

(A).

Set

Stereo

Selector

(B)

to

2-CH

position.

Select

tape

speed

with

Tape

Speed

Selector

Switch

(C).

With

Reset

Button

(D),

set

Index

Counter

to

“0000”.

This

Index

Counter

furnishes

a

quick

reference

for

locating

positions

on

the

tape.

5.

Set

Monitor

Switch

(E)

to

SOURCE

position.

6.

Adjust

and

balance

Recording

Level

Controls

(front

channel

left

and

right)

(F)

while

observing

correspond-

ing

VU

Meters.

Normal

recording

level

should

not

exceed

“0”

VU.

7.

When

an

optimum

level

has

been

determined,

while

holding

Record

Safety

Button

(G)

at

depressed

position,

depress

Forward

Button

to

begin

recording.

8.

To

stop tape

travel

during

recording,

depress

Stop

Button

(H).

9.

Invert

reels

for

recording

on

reverse

side.

=

NOTES

FOR

YOUR

CONVENIENCE

*

When

using

Line

Input

Jacks

for

connection

with

the

external

source,

the

input

level

is

adjusted

with

the

Line

Recording

Level

Controls.

When

using

Din

Jacks

for

connection

with

an

external

amplifier,

or

the

Microphone

Jacks

the

input

level

is

adjusted

with

the

Microphone

Recording

Level

Con-

trols.

Microphones

must

not

be

placed

on

top

of

or

too

close

to

the

recorder.

Preferably,

the

microphones

should

be

placed

on

a

separate

table

to

prevent

vibrations

of

the

recorder

motor

from

reaching

them.

For

best

results,

a

distance

of

at

least

2

meters

should

be

maintained

between

microphones.

The

use

of

the

Monitor

Switch

during

recording

enables

correct

adjustment

of

the

sound

source

input

level

as

well

as

comparison

of

the

sound

source

and

the

recording.

For

monitoring

sound

source

depress

Monitor

Switch

to

IN

position,

and

for

monitoring

recording

depress

to

OUT

position.

To

momentarily

suspend

reel

movement

during

record-

ing,

use

the

Pause

Button.

For

monitoring

sound,

use

stereo

headphones

of

8

2

impedance.

Connect

headphone

plug

to

the

Headphone

Jacks

on

front

panel.

The

Din

Jacks

are

used

for

inter-connecting

the

GX-280D-SS

with

an

external

amplifier.

This

system

enables

easy

recording

or

playback

through

an

external

amplifier

as

the

complex

connection

or

disconnection

of

several

separate

plugs

is

not

necessary.

The

GX-280D-SS

is

also

equipped

with

a

Din

Jack

Input

Selector

Switch.

When

recording

from

an

external

amplifier,

if

the

output

level

of

the

amplifier

is

high,

set

Selector

Switch

to

HIGH

position,

and

if

low,

set

to

LOW

position.

For

easy

check

of

input

level

when

using

Din/Din

connection

cord,

after

connection

has

been

made,

turn

input

level

to

maximum.

If

VU

indicator

movement

is

limited,

set

switch

to

LOW

position.

If

indicator

moves

excessively,

set

Selector

Switch

to

HIGH.

In

case

the

indicator

shows

no

movement

at

either

position,

use

opposite

ends

of

the

Din

cord.

11

SOUND-ON-SOUND

RECORDING

The

Sound-on-sound

feature

is

utilized

for

transfer

of

previously

recorded

material

from

one

channel

to

another

for

language

training,

fun

or

professional

use.

First

Recording

1.

Confirm

that

there

are

no

connections

to

the

Input

Jacks.

2.

Set

Stereo

Selector

to

4-CH

position.

3.

Plug

in

microphone

to

rear

channel

left

Microphone

Jack.

4.

Depress

Monitor

Switch

to

SOURCE

position.

5.

Adjust

rear

channel

left

Microphone

Recording

Level

Control

while

observing

corresponding

VU

Meter.

6.

Depress

Reset

Button

and

set

Index

Counter

to

“0000”.

7.

While

holding

Record

Safety

Button

at

depressed

position,

depress

Forward

Button

to

begin

first

record-

ing;

i.e.,

A-B-C.

8.

When

the

first

recording

is

completed,

rewind

tape

to

starting

point.

Second

Recording

9.

Confirm

that

the

Monitor

Switch

is

at

SOURCE

position

and

set

Sound-On-Sound

Switch

at

rear

of

unit

to

ON

positon.

10.

Set

Stereo

Selector

to

2-CH

position.

11.

Plug

in

microphone

to

front

channel

right

Microphone

Jack.

12.

Increase

front

channel

right

Line

Recording

Level

Control

to

approximately

maximum.

13.

Connect

stereo

headphones

to

front

channel

Stereo

Headphone

Jack

for

monitoring

the

first

recording.

14.

Adjust

front

channel

right

Microphone

Recording

Level

Control

while

observing

corresponding

VU

Meter.

15.

While

holding

Record

Safety

Button

at

depressed

position,

depress

Forward

Button

to

begin

second

recording;

ie.

A’-B’-C’.

As

the

second

recording

A'-B'-C'

is

being

made,

the

first

recording

A-B-C

is

monitored

through

headphones.

The

two

recordings

will

be

completely

merged

on

front

channel

tracks.

...

A-A'-B-B'-C-C'.

16.

For

playback,

rewind

tape

to

starting

point,

depress

Monitor

Switch

to

TAPE

position

and

set

both

recorder

and

external

amplifier

to

front

channel

playback

mode.

12

SOUND

MIXING

Model

GX-280D-SS

is

equipped

with

independent

Line

and

Microphone

Jacks

and

input

level

controls

for

mixing

signals

from

two

separate

sources

simultaneously.

Record

your

own

voice

accompanied

by

your

favorite

combo,

orchestra,

etc.

1.

Connect

power

cord

and

turn

on

Power

Switch.

2.

Set

Stereo

Selector

to

2-CH

or

4-CH

position

as

desired.

3.

Select

tape

speed

with

Tape

Speed

Selector

Switch.

4.

With

Reset

Button,

set

Index

Counter

to

“0000”.

This

Index

Counter

furnishes

a

quick

reference

for

locating

positions

on

the

tape.

5.

Plug

in

microphone(s)

to

Microphone

Jack(s)

and

connect

line

output

of

external

source

to

Line

Input

of

the

GX-280D-SS.

6.

Set

Monitor

Switch

to

SOURCE

position.

7.

Adjust

and

balance

microphone

input

level

with

Microphone

Recording

Level

Control

and

line

input

level

with

Line

Input

Level

Control

while

observing

corresponding

VU

Meters.

Normal

recording

level

should

not

exceed

“0”

VU.

8.

When

an

optimum

level

has

been

determined,

while

holding

Record

Safety

Button

at

depressed

position,

depress

Forward

Button

to

begin

recording.

9.

To

stop

tape

travel

during

recording,

depress

Stop

Button.

See

AUTOMATIC

STOP

&

SHUT-OFF.

10.

If

recording

is

made

in

2-channel,

invert

reels

for

recording

on

reverse

side.

*

Mixing

can

also

be

accomplished

by

using

the

Din

Jack

and

Line

Input

connections

simultaneously.

*

For

playback,

operate

the

Stereo

Selector

according

to

channels

used

in

making

recording.

TAPE

ERASING

Any

signals

previously

recorded

on

the

tape

will

auto-

matically

be

erased

as

a

new

recording

takes

place.

For

erasing

only,

load

a

tape

and

set

recorder

to

recording

mode.

Model

GX-280D-SS

is

equipped

with

separate

2-channel

and

4-channel

erase

heads.

For

full

track

erase,

set

Stereo

Selector

to

4-CH

position

and

for

2-channel

erase,

set

to

2-CH

position.

No

plugs

should

be

connected

to

the

input

jacks

and

input

volume

should

be

kept

at

minimum.

TAPE

SPLICING

&

EDITING

Cut

tape

diagonally

with

an

overlap

so

that

the

ends

are

lined

up.

Cover

aligned

ends

with

splicing

tape.

Press

firmly

exerting

pressure

to

secure

ends

evenly.

Trim

off

excees

splicing

tape

cutting

into

recording

tape

very

slightly

to

eliminate

the

posibility

of

a

sticky

splice.

Tape

splicing

using

scissors

requires

skillful

work.

Akai

Tape

Splicer

Model

AS-3

is

recommended

for

smooth

and

easy

tape

splicing.

TENANCE

HEADS

SHOULD

ALWAYS

BE

KEPT

CLEAN

For

quality

performance,

it is

imperative

that

the

head

block

be

kept

clean

at

all

times.

Dust

and

magnetic

particles

tend

to

deposit

on

the

heads

after

prolonged

use

of

the

unit,

deteriorating

sound

quality

and

sensitivity.

The

GX

Heads

do

not

normally

require

cleaning.

However,

if

old

tapes

or

tapes

which

have

been

spliced

are

used,

head

cleaning

is

recommended.

Clean

by

rubbing

the

entire

head

surface

(do

not

scratch)

with

a

cotton

swab

stick

soaked

in

Akai

cleaning

fluid

(from

HC-500

Head

Cleaning

Kit)

or

alcohol.

PINCH

WHEEL

&

CAPSTAN

CLEANING

If

magnetic

particles

from

the

magnetic

tape,

oil,

or

other

foreign

matter

is

allowed

to

accumulate

on

the

Pinch

Wheel

and

Capstan,

irregularity

in

tape

transport

may

occur

deteriorating

sound

quality.

It

is,

therefore,

recommended

that

these

parts

be

wiped

clean

occasionally.

For

cleaning,

use

Akai

Cleaning

Kit

HC-500,

or

if

Akai

cleaning

fluid

is

not

available,

use

alcohol.

*

Do

not

use

chemicals

such

as

chlorothane,

etc.,

as

the

rubber

wheel

will

deteriorate.

HEAD

DEMAGNETIZING

Normally,

the

steel

pole

pieces

which

form

part

of

the

recording

and

playback

heads

become

slightly

magnetized.

The

effect

of

magnetization

is

that

it

causes

considerable

drop-out

or

introduces

noise

into

your

recordings.

It

is,

therefore,

recommended

that

head

demagnetizing

be

per-

formed

periodically.

This

can

be

accomplished

with

a

bulk

head

demagnetizer

by

bringing

it

close

to

the

heads

and

making

several

circular

motions

over

all

head

surface

areas

as

well

as

the

head

housing.

*

Be

sure

to

cut

off

the

power

of

the

unit

prior

to

demagnetizing

the

heads.

*

Do

not

use

magnetized

tools

in

the

vicinity

of

the

heads.

*

Do

not

bring

the

prongs

of

the

demagnetizer

close

to

the

VU

Meters.

(13

^6

N

А

P.

"i

i

ЖИ

Selector

Plug

Fuse

Post

<=

TECHNICAL

DATA

Track

System

.......

4-track

4/2-channel

compatible

stereo

VOLTAGE

&

CYCLE

CONVERSION

CEE,

CSA,

and

UL

Standard

models

are

not

equipped

with

a

Voltage

Selector

or

Cycle

Conversion

Switch.

Therefore,

voltage

and

cycle

conversion

is

not

necessary.

If

your

machine

corresponds

to

any

of

these

standards,

please

disregard

all

references

to

voltage

and

cycle

adjustment

throughout

this

manual.

VOLTAGE

Equalization

Your

machine

is

equipped

with

a

universal

voltage

selector

offering

six

selections

of

voltage

from

100

V

to

240

V

A.C.,

for

worldwide

operation.

Voltage

is

preset

at

the

factory

o

Ф

Frequnecy

Response

.

(Using

low

noise

tape)

according

to

destination.

However,

the

operator

is

re-

20

Hz

to

25,000

Hz

(+3

dB)

quested

to

confirm

setting

and

if

readjustment

is

necessary,

à

at

7-1/2

ips

proceed

as

follows

:

(1)

Disconnect

power

cord

and

remove

30

Hz

to

20,000

Hz

(+3

dB)

the

Fuse

Post

by

screwing

in

direction

of

arrow.

(2)

at

3-3/4

ips

Remove

the

Voltage

Selector

Plug

and

reinsert

so

that

(Using

regular

tape)

proper

area

voltage

shows

through

plug

cut-out.

(3)

Change

30

Hz

to

23,000

Hz

(+3

dB)

Maximum

Reel

Capacity:

гае

7"

reel

Tape

Speed.

.

.

7-1/2

and

3-3/4

ips

(+0.5%)

Wow

&

Flutter

Less

than

0.10%

RMS

at

7-1/2

ips

Less

than

0.15%

RMS

at

3-3/4

ips

Voss

tee

Correct

equalization

for

playback

of

tapes

recorded

to

the

NAB

curve.

fuse

according

to

voltage

(please

refer

to

supplied

fuse

tag

at

7-1/2

ips

instructions).

30

Hz

to

19,000

Hz

(+3

dB)

*

To

maintain

optimum

performance

and

prolong

the

life

of

your

at

3-3/4

ips

machine,

it

is

important

that

the

line

voltage

be

held

within

a

i š

“б?”

10%

deviation

of

standard

area

voltage.

“t

ia

LO

Ost

1:000:Hz

#0

уп)

ignal-To-Noise

Ratio

...

.

55

dB

CYCLE

. i

Erase

Кайо...

.

Better

than

70

dB

Correct

tape

speed

cannot

be

obtained

if

the

Cycle

Bias

Frequency

110

kHz

Conversion

Switch

located

on

the

rear

panel

of

the

Heads...

Е

(4)

СХ

recording

and

playback

GX-280D-SS

is

not

properly

positioned.

Disconnect

power

cord

and

set

to

50

Hz

or

60

Hz

according

to

area

power

source,

heads,

full-track

erase,

2-channel

erase

heads.

Motors

............

(3)

One

servo-motor

for

direct

capstan

drive

and

two

6-pole

STANDARD

ACCESSORIES

"

outer-rotor

motors

for

supply

Connection

Сога!

vous.

«мл

e

seti

fe

а

кайлы

a

1

set

o

@

and

take-up

reel

drive.

Demonstration

Tape

o

popes

aus

tre

rtm

mr

eS

XS

1

Empty

Metallic

Reel

«22:22

Tow

А

EO

hee

1

Sensimp

Шарен.

е

аа

mapu

dyes

oso

oe

eeu

etico

1

Spare

Fuse

.....

Operator's

Manual

.

*

Spare

fuses

are

not

included

with

CEE, CSA,

UL,

and

LA

Stand-

ard

models.

Fast

Forward

&

Rewind

Time

.....

Within

90

seconds

using

a

1,200

ft.

tape.

Recording

Capacity

..

2-channel

stereo

:

2

hrs.

(1,200

ft.

tape,

3-3/4

ips)

4-channel

stereo

:

1

hr.

(1,200

ft.

tape,

3-3/4

ips)

Output

Jacks

.......

Line

(4):

1.23

V

(*0"

VU)/

100

22;

Required

load

impedance

:

more

than

25k

Phone

(2)

:

40

mV/8

Q

InputJacks.......

es

Microphone

(4)

:

0.5

mV/10kQ

Line

(4)

:

0.1

V/150

kQ

Din

Jacks:

2...

(2)

:

0.4

V/60

mV

(High)

10

mV

(Low)

Semi-Conductors

....

68

silicon

transistors,

У

52

diodes

Integrated

Circuits

...

4

Power

Supply

.......

100

V

to

240

V

A.C.,

50/60

Hz

CEE

models:

220

V,

50

Hz

CSA

models:

120

V,60

Hz

UL

&

LA

models:

120

V,60

Hz

Power

Consumption

..

140W

Dimensions.........

435(W)

x

505(H)

x

250(D)

mm,

(17.4

x

20.2

x

10")

Weight

ласа

we

22.4

kg

(49.5

Ibs)

*

For

improvement

purposes,

specifications

and

design

are

subject

to

change

without

notice.

TROUBLE

SHOOTING

CHART

The

conditions

listed

below

do

not

indicate

mechanical

failure

of

your

unit.

If

your

machine

exhibits

any

of

these

conditions,

check

for

trouble

as

indicated.

SYMPTOM

TROUBLE

REMEDY

16

Loss

of

sensitivity

and

tone

quality.

*

Dirty

Erase

Head.

*

Wrong

side

of

tape

facing

the

heads.

A.C.

power

lower

than

the

voltage

to

which

your

machine

is

adjusted.

*

Magnetized

head.

*

Tape

Selector

Switch

is

set

incorrectly.

See

HEADS

SHOULD

ALWAYS

BE

KEPT

CLEAN.

See

VOLTAGE

&

CYCLE

CONVERSION.

See

HEAD

DEMAGNETIZING

Machine

will

not

record

or

play.

Check

positions

of

controls

and

input/output

connections.

Check

position

of

the

Pause

Button.

Check

positions

of

the

Stereo

Selector.

Irregularity

in

tape

transport.

Oil

or

magnetic

particles

adhering

to

the

Capstan

or

Pinch

Wheel.

Sticky

or

dirty

tape

surface.

*

Improperly

loaded

tape.

*

A.C.

power

lower

than

the

voltage

to

which

your

machine

is

adjusted.

Sensing

tape

is

affixed

improperly.

See

PINCH

WHEEL

&

CAPSTAN

CLEANING.

See

TAPE

LOADING.

See

VOLTAGE

&

CYCLE

CONVERSION.

See

AUTOMATIC

&

MANUAL

REVERSE

PLAYBACK.

Tape

will

not

run.

Blown

fuse.

*

Power

is

not

being

supplied.

Machine

is

set

to

pause

mode.

Twisted

or

sticky

tape.

Check

power

cord,

Power

Switch,

and

Shut-Off

Button.

Previous

recording

will

not

erase.

Erase

head

is

dirty.

See

HEADS

SHOULD

ALWAYS

BE

KEPT

CLEAN.

Distorted

or

noisy

sound.

Recording

level

is

too

high.

Check

external source

controls

and

connections.

Normal

recording

level

is

“0?

VU.

“Surround

Stereo”

used with

permission

of

Vangard

Records.