Akai At-k02 User manual

Q

VY

oy

X

os

Te

ae

Ni

:

Le

1

{

.

4

KO

5

‘

\

moo

AT

=

\

i

o~ o-

==

~

MODEL

A

Beak

\

~S

i

a

Vou

bs

‘AMPLFIER

-

4

on

vi

i

s

"1

STEREO

INTEGRATED

wii

FN

OM

STEREO

TUNER

moom

AT-KO2

AKALI

aranco

wreanares

aAneumee

AKAI

AT-K02

AM-U0Q2

FM

AM

STEREO

TUNER

uoveLA

T-KO2

STEREO

INTEGRATED

AMPLFIER

uopeLAM-U02

ALSO

APPLICABLE

TO

BLACK

PANEL

MODEL

SECTION

1

MODEL

AT-K02

SERVICE

MANUAL

SECTION

2

MODEL

AM-U02

SERVICE

MANUAL

SECTION

3.

PARTS

LIST

..................----2455

31

SECTION

4

SCHEMATIC

DIAGRAM................-

45

SECTION

1

MODEL

AT-KO2

SERVICE

MANUAL

TABLE

OF

CONTENTS

L..

SPECHNICAL

DATA.

sacred.

2d

iy

tmospe

hati

ee

Wig

he

alate

ad

date

OteeGss

4

i,

“DISMANTLING:

OFUNIT

0

sh-1

0d

4

ga

ga-eutide

wv

nseaten

de

binec

eae

Aa

Eun

bo

UNS

ee

5

Hs.

“CONTROLS

x

ss.

otter

ees

bane

weds

weenie

eee

Beaten

wabee

CRAG

eat

wees

Gay

6

TV.

“PRINCIPALPARTS

LOCATION’

24324

oo

awies

Hoo

hh

talel

Gots

cotatileys

ohare

fe

ees

7

We

“VOLTAGE

CONVERSION

|

.iscit:o2t3

25.406

Saree

uae

hi

Soroka

he

Sea

aes

an

eae

and

8

Vi.

STUNER

ADJUSTMENT:

sc.02.55

eae

oe

bos

rhage

e

kh

Sadao

ee

ewes

oa

Rae

Rb

9

1c

EM

TONER

SECTION

ADIUSTMENT

34.54

oo

wate

soe

aw

day

wad

eae

at

po

dadtawernees

0

2:

AM

TUNER:

SECTION

ADJUSTMENT

$224.65

$cc

4000

¥a-e

Sire

E9044

pee

bey

Peed

ees

1

Vil.

TUNING

CORD

THREADING

3.60225

aoe

opi

es

awed

ei

wae

OL

aS

Wes

ke

ee

2

VIII.

CLASSIFICATION

OF

VARIOUS

P.C

BOARDS

.........0

00000

cee

ce

cee

een

eens

2

1.

P.C

BOARD

TITLES

AND

IDENTIFICATION

NUMBERS

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

000000

e

eee

euee

2

2.

COMPOSITION

OF

VARIOUSP.C

BOARDS

...........

0.00

cee

eee

ences

3

For

basic

adjustments,

measuring

methods,

and

operating

principles,

refer

to

GENERAL

TECHNICAL

MANUAL.

1.

TECHNICAL

DATA

FM

TUNER

SECTION

FREQUENCY

RANGE

|

|__87.5

MHz

to

108

MHz

_

SENSITIVITY

(IHF)

:

19

yV

oan

=

CAPTURE

RATIO

_

;

1.2

dB

ack

SELECTIVITY

(IHF)

-

____._

More

than

65

dB

_

er

8

en

IMAGE

REJECTION

More

than60dB(98MHz)

ee

IF

REJECTION

_

More

than

85dB(98MHz)

a

SPURIOUS

REJECTION

'

More

than

85

dB

(98

MHz)

AM

SUPPRESSION

me

_

60

dB

-

SIGNAL

TO

NOISE

RATIO

!

73

dB

HARMONIC

DISTORTION.

=

=MONO

|

Less

than

0.09%

(100%

modulation)

=

a

_

STEREO

_|_Less

than

0.12%

(100%

modulation)

TUNING

INDICATOR

;

3

LEDs

SIGNAL

INDICATOR

"5

LEDs

i

MUTING

-

—

\_

Switchable

to

ON-OFF

-

a

STEREO

SEPARATION

»

More

than

52

dB

(1

kHz)

7

_

SUB

CARRIER

SUPPRESSION

More

than

60

dB

OUTPUT

VOLTAGE

~

"Fixed

1

V

(100%

modulation)

pa

ANTENNA

INPUT

IMPEDANCE

__

300

ohms

balanced,

75

ohms

unbalanced

-

AM

TUNER

SECTION

FREQUENCY

RANGE

|

520

kHz

to

1,605

kHz

SENSITIVITY

(IHF)

|

_150

pV/m

(bar

antenna),

10

pV

(external

antenna)

a

SELECTIVITY

(IHF)

__

More

than

30

dB

7

ae

IMAGE

REJECTION

"More

than

55

dB

(1,000

kHz)

7

IF

REJECTION

_

-

More

than

40

dB

a

-

SIGNAL

TO

NOISE

RATIO

More

than

55

dB

>

OUTPUT

VOLTAGE

«300

mV

(30%

modulation)

ANTENNA

a

Built-in

ferrite

barantenna

epee

MISCELLANEOUS

SEMICONDUCTORS

Transistors:

26,

Diodes:

13,

LED:

6,

ICs:

4

POWER

REQUIREMENTS

'

120

V,

60

Hz

for

U.S.A.

and

Canada

220

V,

50

Hz

for

Europe

except

UK

240

V,

50

Hz

for

UK

and

Australia

a

110/220/240

V,

50/60

Hz

internally

switchable

for

the

other

countries

POWER

CONSUMPTION

—

20W

7

;

DIMENSIONS

;

440

(W)

x

78

(H)

x

340

(D)

mm

(17.3

x

3.1

x

13.4)

inches

WEIGHT

_

4.9

kg

(10.8

Ibs)

_

*

For

improvement

purposes,

specifications

and

design

are

subject

to

change

without

notice.

il.

DISMANTLING

OF

UNIT

In

case

of

trouble,

etc.

necessitating

dismantling,

please

dismantle

in

the

order

shown

in

the

Photographs.

Reassemble

in

reverse

order.

WN

SCREWS

UPPER

COVER

i

FRONT

PANEL

SCREWS

il.

CONTROLS

AKA

FM

AM

BTEREOD

TUNER

moc

AT-KDOE

vom

"

ane

°

,

A

.

-

SOCK

WALARD~

BO

NOT

BPEN/

.

AKA!

ELECTRIC

co,

uD.

om

(Tea)

SE

OC

CC

—

AE

PAS

LEY

‘

Ay

a

DERORRENCSELF

Mt

RICHT

BETH!

MADE

IN

JAPAN

Fig.

|

Controls

1.

POWER

SWITCH

9.

FM

SWITCH

2.

FMDIAL

SCALE

10.

AM

SWITCH

3.

AM

DIAL

SCALE

11.

TUNING

KNOB

4.

SIGNAL

STRENGTH

INDICATOR

12.

FM

LOC

SWITCH

5.

FM

CENTER

TUNING

INDICATOR

13.

FM

and

AM

ANTENNA

TERMINALS

6.

FM

STEREO

LAMP

14.

AM

FERRITE

BAR

ANTENNA

7.

FM

SERVO

LAMP

15.

OUTPUT

JACKS

(Left

and

Right)

8.

FM

MODE

SWITCH

16.

POWER

CORD

(Some

models

have

power

cord

inlets

instead.)

iv.

PRINCIPAL

PARTS

LOCATION

a

nn

eee

FM

CENTER

TUNING

FM

SERVO

SELECTOR

INDICATOR

SWITCH

TUNING

D3toD5

De

swl

SHAFT

POWER

SIGNAL

FM

STEREO

FM

MOOE

SWITCH

STRENGTH

INDICATOR

SWITCH

SW

90l

INDICATOR

Dé

SwW2

DI

Fig.

2

Front

View

FUSE

:

HOLDER(A)

BAR

ANTENNA

ANT9OI

FRONTEND

ATT

PC

BOARD

FFI26UI2

POWER

ATK=-

2003

TRANS

RORMER

T90!1

AYKO2T

is

)

ATAO2T-70_

79ad.T4

POWER

SWITCH

swesodl

TUNER

P.C

BOARD

ATK-2001A

Fig.

3

Top

View

V.

VOLTAGE

CONVERSION

110V

AREAS:

FI

400mA

220V

AREAS:

F2

200mA

240V

AREAS

:

F3

200mA

POWER

TRANS

ATKO2T-70

Models

for

Canada,

USA,

Europe,

UK

and

Australia

are

not

equipped

with

this

facility.

Each

machine

is

preset

at

the

factory

according

to

destination

but

some

machines

can

be

set

to

110V,

220V

or

240V

as

required.

If

voltage

change

is

necessary,

this

can

be

accomplished

as

follows.

1)

Disconnect

AC

Power

Cord.

2)

Loosen

holding

screws

and

remove

upper

case.

3)

Remove

existing

line

voltage

fuse

in

proper

fuse

holder,

explicitly

following

instructions

printed

on

the

rear

panel.

Fig.

4

Fuse

Holder

(A)

(U/T

Model)

TUNER

ADJUSTMENT

VI.

|

mm

we

ii

®)

QNI

TVNOIS

LNSWLSNCOV

g3qa3N

ON

(WT)

SL

Sit

NOILVYVdAS

dt

WV

O3u3aLS

anoz gnoz

Q

S

SUA

(Q3Y)

ZL

ZOA

Save

=

oe

9S0

WV

©

E€

al

WV

[S|

©

ant

[O)

a,

[2]

AONANO3Y4

7

™

gn00!

7

ONINNNY

3344

[Lo

ya

fered

o1

Wd

(,

oO

Ss

AP

ayo!

SYA

Or

lo}

‘oh

fe

XdW

Md

291

IDA

dil

ai

al

WV

£9!

SN3S

WY

()

aa

as

SNaS

W4

SN3S

W4

Ba

VoL

baad

YOk

OL

;

q—el

anool

ZyA

:

©

yOLOV4

:

NOLLYOLSIO

~v

©

ONINSLNZO

S=/

|

ONI

ONINAL

W4

D—EL

bh

GXOE

YA

mt

980

WS

sig

Oy

WaA37

aLAW

15

EG)

[2].

W4

dl

W4

191

5

Tuner

P.C

Board

ATK-2001A

Fig.

FREQUENCY

COUNTER

C\

O

«gl

W

a

INPUT

Or

O

Fo

Oy

uS

—

AC

VOLTMETE

pMpees

TERMINATION

PAD

76KHz

TP

d

aa

acd

es

a

&

|

input

a

Oe

ans

e

‘a

300

OHMS)

REC

OUTPUT

o

INPUT

0

B

O

ANTENNA

h\

OUTPUT

TERMINAL

Rech

|W

AC

VOLT

METE

REC

OUTPUT

o

(\

lo

AT—KO2

¥

|

INPUT

FM

STEREO

DISTORTION

GENERATOR

METER

Lchd

Roh

Al.

ot

O

Y

[

output

inpuT

|

1.

FM

TUNER

SECTION

ADJUSTMENT

(Refer

to

Figs.

5,

6)

Fig.

6

Instrument

Connections

aaa

=

a

cence

mi

cay

Step

Adjustment

Item

__

Adjustment

Point

_

Result,

_Remarks

|

Front

End

Tl

Maximum

Noise

Selector

|

2

PM,

and

Mode

|

]

:

MONO.

Tune

in

noise

only

IF

Coil

(Front

End)

Level

without

broadcast

interference.

Funihe

jnidicaior

Center

indication

;

|

2

Centering

T3-a

Sr

rani

LEDs

98

MHz,

60

dB

(mono)

input.

Distortion

7

:

Less

than

0.09%

98

Mee:

60

ves

(mono)

i

puke

3

T3-b

:

Less

than

0.09%

in

both

Factor

|

Distortion

Factor

i

‘

channels.

|

es

ae

ee

a

=

at

ets

=

somes

:

a

Contiimation

of

If

funing

indieatar

is

not

4

Tuning

indicator

centered,

re-adjust

Steps

2

and

Cente

ring

3

above.

High

Rane

TCo

|

Maximum

output

108

MHz,

60

dB

(anisti9)

input.

|

5

Scale

(Giont

End)

|

Minimum

Distortion

Scale

indicator

to

108

MHz.

indication

.

Factor

Error:

Within

+250

kHz

Confirmation

|

Maximum

output

88

MHz,

60

dB

(mono)

input.

|

6

|

of

Low

Range

'

Minimum

Distortion

Scale

indicator

to

88

MHz.

Scale

indication

Factor

Error:

Within

+250

kHz

|

i

el]

:

-

pera

7

4

|

High

Range

TCR,

TCA

Less

than

3%

108

MHz,

ess

than

6

dB

Sensitivity

-

Eten

Epa

Distortion

Factor

|

(mons)

inpue

CBunaation:

Less

than

3%

88

MHz,

bess

“thas

6

dB

8

of

Low

Range

Hisorhion

Pace

(mono)

input.

|

Scale

indication

Rel

to

NOTES

2,

3

9

ues

tevel

|

VRI30kB

“No

Signal

emitted

Kode

to

STEREO.

|

from

output

98

MHz,

22

dB

(mono)

input.

10

a

Frequency

Counter

to

Test

HOF

a9

pi

-

Free

VR6

10

kB

76.00

kHz

|

Point.

ee

ie

ae

Refer

to

NOTES

4,

5.

Confirmation

'

98

MHz,

60

dB

(stereo)

input.

11

of

Stereo

No

lighting

of

stereo

indicator

Lighting

indicates

no

stereo

separation.

Minimum

2)

———

ete

Rs

bee

oS

Pilot

Signal

VR3

100

kB

|

98

MHz,

60

dB

(stereo)

pilot

2

:

;

i

Cancel

L6

output

signal

only

input.

|

ees

:

98

MHz,

60

dB

(stereo)

Leh

13

(L

Fs

nee

VRS

20

kB

More

than52dB

_

input.

‘

e

|

Minimum

output

of

Rch.

St

S

3

98

MHz,

60

dB

(stereo)

Reh

14

aio

VR4

20

kB

More

than

52dB

input.

|

8

i

'

Minimum

output

of

Lch.

Sienal

indicat

98

MHz,

50

dB

(mono)

input.

Adjust

VR2

to

a

point

15

peer

VR2

100

kB

where

Sth

LED

of

SIGNAL

INDICATOR

lights

up.

eencliiily

|

Refer

to

NOTE

6.

ee

eae,

:

ages

ee

5

Sees

Sl

Chart-1

NOTES:

1.

Set

the

FM

ANTENNA

ATT.

switch

to

DIST.

.

When

the

specified

sensitivity

of

6

dB

cannot

be

obtained

at

the

two

frequency

points,

88

MHz

and

108

MHz

repeat

adjustment

as

in

Step

7.

_

When

the

distortion

factor

of

the

sensitivity

still

does

not

comply

with

the

data

specifications,

adjust

by

turning

the

Front

End

FM

IF

coil

(T1)

core

but

not

more

than

1/2

turn.

.

When

connecting

a

frequency

counter,

connect

from

TP

via

a

100

kohmss

resistor.

.

The

free

Running

Frequency

of

the

PLL

IC

must

be

an

exactly

76.00

kHz.

.

The

Sth

LED

lights

up

at

50

dB

but

when

the

attenuator

is

decreased

2

dB

it

is

extinguished.

to

wo

Dns

BAR

ANTENNA

CORE

Fig.

7

Bar

Antenna

2.

AM

TUNER

SECTION

ADJUSTMENT

(Refer

to

Figs.

5,

7)

[Step

Adjustment

Item

|

Adjustment

Point

Result

Remarks

|

:

|

Low

Range

Scale

!

BeleciOn

a

aye

|

pol.

|

Fl

carion

T2

(RED)

Maximum

Output

|

530

kHz

50

dB

input.

|

Error:

Within

2%

t

sf

oa

7

aaa

a

ln

acs

aes

ws

ne

eet

oS

=

Me

ee

ae

ees

|

ae

bee

|

T4

(BLK)

Maximum

Output

530

kHz

50

dB

input.

287

Sarai

TS

(BLK)

Minimum

Distortion

Less

than

10%

Distortion

y

Bar

Antenna

Core

Factor

|

Factor

"High

Range

Seale

|

1,600

kHz

50

dB

input.

|

?

:

indication

|

wie

MaxununeQuiput

Error:

Within

2%

|

=

re

~

——

panne

ae

on

~~

pa

Berens

Hich

Range

Maximum

Output

—«1,600

kHz

50

dB

input.

4

8

ee

=

VC

1

.

Minimum

Distortion

|

Less

than

10%

Distortion

Sensitivity

Factor

|

Factor

Chir

t-2

NOTE:

For

best

results,

repeat

Steps

|

through

4

two

or

three

times.

re

1]

VI.

TUNING

CORD

THREADING

—s

FINISH

START

PAINT

LOCK

WITH

ADHESIVE

AGENT

APPLY

MINUTE

AMOUNT

OF

OIL

TO

SHAFT

APERTURE

(AVOID

GETTING

OIL

ON

THREAD)

PAINT

LOCK

WITH

ADHESIVE

AGENT

Fig.

8

Tuning

Cord

Threading

VII.

CLASSIFICATION

OF

VARIOUS

P.C

BOARDS

1.P.C

BOARD

TITLES

AND

IDENTIFICATION

NUMBERS

:

P.C

Board

Title

Number

of

P.C

Board

—~T

C

a

!

aa

:

Tuner

P.C

Board

ATK-2001A

J

j

LED

P.C

Board

_

hk

ATK-2002

a

:

|

j

ATT

P.C

Board

;

a

ATK-2003

|

Chart-3

2.

COMPOSITION

OF

VARIOUS

P.C

BOARDS

Tuner

P.C

Board

ATK-2001A,

LED

P.C

Board

ATK-2002

and

ATT

P.C

Board

ATK-2003

ant9o1

[AM

BAR

ANTENNA

Z|

2 g

is

2)

=z

=

in}

S

z

H

Eg

I

3}

[2]

0

a]

&

[él

e

c

Seales

eae

iQ@

@

Qi:

Ltn

tee

Le

a

FLIyFL2

SFEIO.7MN

BOARD

ATK-200I

Ru

100

5

=

O

AWK

4

FT

eS

;

o°

sg]

o—w—e8

RT

68K

&———-?

8

cig

Oe

ae

TRI2

2

Re

NOK

|

oT

—w—e

cesooe7

C82

6PLF)

@———@

£76

0047

2SCO30(E

NF)

ome

3

15K

ninttatioe.

Gers

aise

once)

ue

gah.

r

et

0014.3v

&

eas”

uly

teas

C4

001

We

C12_22/6—

San

mann

OE

abet

SIS

gp

edie

oS.

fees

:

oa

ve

OW

|

cre

zario

smcrenoss

sof)

RIGHT

xo

85

220

Hast

“

[ourPut

a

fer

ta

zt

2

LEFT

eLK

«

RIE

100K

5

%

,

=

aa

eke

ott

spe”

S558

LF

:

weg

DIAL

ILLUMINATION

aaa

=

Wee

i

tAL

|

Winns

er:

os

Mea)

;

Sa

RIS

LAMP

fe

ast

oz

Se

=

la

ow

1ND904

IND903

1ND902

iND9O1

°

BP

Slat

Pwede

tie

ets

=

oe,

au

()

(o)

(*)

(o)

o——e

szvefo

“ee

lo

&

gov

(0)

(%)

(9)

a

S6v

@49

ofgen

7

=

R27,

100K

Bay

Ez

mM

B

Mm

o——8

SEV:

ye

147w

ad

ra

a

aes

iar

oe

ees

aR

apace

SE:

;

eB

=

PB

e,

KG

ey

higgrye”

BLK

ATT

PC

BOARD

DIST

ATK-2003

C87

A047

°

63

606

0947

Riza?

IM

Ub

22pHiK)

©

C6M

oO

oe

TRI

to

TR6,TRO

10

TRIA

TRIG,

TRIT,ICI

y

1C2

FM

TUNE

DETUNE(

)

REB(FS)S6

AS-IATION

R44

27K

FACTOR

OW

©

eile

e—w—e

&

1c3

ors

:

R125,

860K

©,

AM

TUNE

: ;

spe

DETUNE(

)

Bred

8

%

rie]

Oe

be

0

Ope

Os

Pb

POe,

ves

ee

|

o

So

ov

cay

10KB

gt

wyeeres

—ecs

es

eee

30

o

PLL

ral

381

29

€34

00047

aUNNING

2SA608

K

os

otreu)

‘

38C536K—

NP

4

R76

24

z

‘8%s

a)

75444

24

x

a

¢33

0.0047

¥:

=

als

6

He

Tt

aT

ACHO10240V

: ‘

ATKO2T-70

BO/6OHr

x

:

=

8

R66,

ISK,

STEREO

SEPARATION:

€37047/50.

|

635.2250

gS

iky..

.

of-e

rl

R67.

15K

(Ren)

0

{Lond

BL

cae

047700

lcsacs

aerate

*

vaste:

:

°

ff

e

LS

a

one

20K

:

.

sepa

0"

ck

aos

as

ac®

§

°

F]

gh

Oty

tee

[eSAl

0313

st

:

*

:

s

O13

:

ba

Riozesni00

ao

6

o

xy

al

#

3

1c4

1Bi405S

1c4

AM,

FM

TUNE

DETUNE(

}

STEREO

=»

MONO

4M

MUTE)

YLW/LONG

RED

LED

PC

BOARD

ATK-2002

Po:

.

st

Tio

lig

lor

owl

ove

1

3d

zs

We

[Gs

|B

a

[servo]

—

[TUNING]

[SIGNAL]

©

REO/WHT

@)

od

)

SLP-1520

02,03

SLP-2510

R78

:

FL4,5

208

BLRC—3415N

Aci2z0v

besoin

dated

6OHz

ATKO2T-30

+7]

2sc536K-NPCFNG)

SAA]

CEE

FUSE

_HOLDER(A)

1.

roo!

[Power]

TRS

to

14,16 toB0,

TR22,23,27

1

T901

FUSE

HOLDER

(A)

sweat

4700P/250(M)

RED

ac24ov

Ac2zov

SOHr

ATKO2T-40

Sone,

ATKO2T-

50

[ae

nce]

WARNING:

QINDICATES

SAFETY

CRITICAL

COMPONENTS.

FOR

CONTINUED

SAFETY,

REPLACE

SarETY

CRITICAL

COMPONENTS

ONLY

WITH

MANUFACTURER'S

RECOMMENCED

PARTS

AVERTISSEMENT:

iL

iNDIQU

LES

COMPOSANTS

CRITIQUES

DE

SURETE.

POUR

MAINTENIR

L€

DEGRE

DE

SECURITE

OE

L'APPAREIL

NE

REMPLACER

LES

CONPOSANTS

DONT

LE

FONCTIONNEMENT

EST

CRITIQUE

POUR

LA

SECURITE

QUE

PAR

DFS

PIECES

RECOMMANOEES

PAR

LE

FABRICANT

13

SECTION

2

MODEL

AM-U02

SERVICE

MANUAL

TABLE

OF

CONTENTS

I:

,

“TECHNICAL

DATA"

ix2.2

ee

2

Dacatns

s

lk

8

alae

a

IE

Pde

eae

AES

ae

es

Baek

ee

16

Il.

DISMANTLING

OF

UNIT

........

0.6.

ccc

ee

eee

ee

eee

tee ete

ees

17

IH.

“CONTROLS

5,

335

gh

Se

eh

ak

Reo

Satya

nds

cgay

Sig

Beate:

Wh

ge

eens

OR

Rae

ee

Ss

18

IV.

PRINCIPAL

PARTS

LOCATION

........

20...

cc

cee

eee

ee

eee

19

V.

VOLTAGE

CONVERSION

........

0.0

cee

eee

ene

eee

ee

20

VI--

CLEVEL

DIAGRAM

3.3.8

6

sca

arate

hha

ee

aa

ee

ei

ad

Sue

ae

ee

tua

ere

a

ola

eo

Ee

Bg

ek

21

VII.

AMPLIFIER

ADJUSTMENT

..........

0.0

ee

cee

ee

eee

ee

nee

22

VIII.

CLASSIFICATION

OF

VARIOUS

P.C

BOARDS

..

0.0...

ee

tne

ee

23

1.

P.C

BOARD

TITLES

AND

IDENTIFICATION

NUMBERS

..........

000.2.

e

eee

23

2.

COMPOSITION

OF

VARIOUS

P.C

BOARDS

..

0.0...

ets

24

For

basic

adjustments,

measuring

methods,

and

operating

principles,

refer

to

GENERAL

TECHNCAL

MANUAL.

15

TECHNICAL

DATA

POWER

AMPLIFIER

SECTION

RATED

OUTPUT

POWER

2-CHANNELS

DRIVEN

26

watts

per

channel,

minimum

RMS,

at

8

ohms

from

20

to

20,000

Hz

with

no

more

than

0.01%

total

harmonic

distortion.

__

POWER

BANDWIDTH

(IHF)

___6

Hz

to

60

kHz/8

ohms

(Total

harmonic

distortion:

0.

1%)

SIGNAL

TO

NOISE

RATIO

(IHF)

PHONO

Better

than

75

dB

Better

than

95

dB

RESIDUAL

NOISE

One

oe

CHANNEL

SEPARATION

(IHF)

__

Less

than

0.5

mV

at

8

ohms

_

-

_____

PHONO

|

Better

than

55

dB

at

1,000

Hz

_

:

Z

DAMPING

FACTOR

-

More

than

4S(1kHz,8

ohms)

er

OUTPUT

SPEAKERS

A,

B

(4

to

16

ohms)/A+B

(8

to

16

ohms)

_HEADPHONE

_

4

to

16

ohms

PRE

AMPLIFIER

SECTION

INPUT

SENSITIVITY/IMPEDANCE

PHONO

AUX

TUNER

TAPE

MONITOR

__DIN:

150

mV/100

kohms

OUTPUT

LEVEL/IMPEDANCE

TAPE

REC

PRE

OUTPUT

_1V/)

kohm

3

mV/47

kohms

150

mV/100

kohms

150

mV/100

kohms

PIN:

150

mV/100

kohms

PIN:

150

mV/1

kohm

DIN:

30

mV/30

kohms

FREQUENCY

RESPONSE

PHONO

(RIAA

EQUALIZATION)

TUNER,

AUX,

TAPE

MONITOR,

30

Hz

to

15

kHz

+0.5

dB,

-0.5

dB

10

Hz

to

40

kHz

+0

dB,

—?

dB

TONE

CONTROL

BASS

+8.5

dB

at

100

Hz

TREBLE

+8.5

dB

at

10

kHz

LOUDNESS

CONTROL

1:

+3

dB

at

100

Hz,

+2.5

dB

at

10

kHz

2:

+6.5

dB

at

100

Hz,

+5.0

dB

at

10

kHz

3:

+10

dB

at

100

Hz,

+9.5

dB

at

10

kHz

__._.

...

(Volume

control

set

at

—30

dB

position)

_

=

-

_

FILTER

HIGH

—3

dB

at

10

kHz

eed!

_SUBSONIC_

—3

dB

at

18

Hz

;

_

MISCELLANEOUS

SEMICONDUCTORS

_

Transistors:

16,

Diodes:

19,

ICs:

9

POWER

REQUIREMENTS

120

V,

60

Hz

for

U.S.A.

and

Canada

220

V,

50

Hz

for

Europe

except

UK

and

Australia

240

V,

50

Hz

for

UK

and

Australia

110/220/240

V,

50/60

Hz

pwitchable

for

other

countries

POWER

CONSUMPTION

_.

40oW

:

pee

DIMENSIONS

:

440

(W)

x

105

()

x

300

(D)

mm

(17.37

x

4.1"

x

11.8")

WEIGHT

—1

7.8

kg

(17.2

Ibs)

*

For

improvement

purposes,

specifications

and

design

are

subject

to

change

without

notice.

16

i.

DISMANTLING

OF

UNIT

In

case

of

trouble,

etc.

necessitating

dismantling,

please

dismantle

in

the

order

shown

in

the

photographs.

Reassemble

in

reverse

order.

UPPER

COVER

I

225

FL

|

au

|

2EE2

|

“—@

[EUEEIEE

@

;

|

+

|

d

BOTTOM

PLATE

8

7

CONTROLS

PAO

Kaeo

ee

en

ee

ery

A

ErwWry

—-

oO

wo

18

|

AKAI

7

a

ems

POWER

SWITCH

SPEAKER

SYSTEM

SELECTOR

SWITCHES

FILTER

SWITCHES

MODE

SELECTOR

METER

SWITCH

CLIPPING

INDICATOR

FLD

BAR

METER

LOUDNESS

SWITCH

INPUT

SELECTOR

INDICATOR

HEADPHONE

JACK

BASS

CONTROL

TREBLE

CONTROL

STEREO

BALANCE

CONTROL

VOLUME

CONTROL

TAPE

MONITOR

SWITCHES

|

=

|

!

wet.

Nowe

AM-JUO?

fi

16.

17.

18.

19.

20.

21.

22.

23.

24.

25.

26.

27.

28.

CARTINE

case

of

une

outnde

of

indicated

Dower

eource

area,

cOneR

ow

sernce

shop

for

necessary

Comernen.

Fig.

1

Controls

INPUT

SELECTOR

GROUND

TERMINAL

PRE-OUT

TERMINALS

MAIN-IN

TERMINALS

A

AND

B

SYSTEM

SPEAKER

TERMINALS

EXTRA

AC

OUTLETS

(Some

models

are

not

equipped

with

this

facility.)

PHONO

TERMINALS

TUNER

TERMINALS

AUX

TERMINALS

TAPE

1

SYSTEM

REC/PLAY

TERMINALS

TAPE

1

SYSTEM

DIN

JACK

TAPE

2

SYSTEM

REC/PLAY

TERMINALS

AC

CORD

(Some

models

are

equipped

with

an

AC

Inlet

instead

of

an

AC

cord.

Connect

with

an

appropriate

power

cord.)

IV.

PRINCIPAL

PARTS

LOCATION

METER

SWITCH

INPUT

SELECTOR

SPEAKER

FILTER

SW6

LED

P.C

BOARD{B)

INDICATOR

Dito

D3

SYSTEM

SELECTOR

SWITCHES

AMU-200!C

eee

INDICATOR

LED

P.C

BOARD(A)

AMU-

2001-8

i

MODE

A

B

SUBSONIC

|

SWITCH

POWER

SWITCH

Swi

SW2 sw3

Sws

swsg0l

LOUDNESS

SWITCH

FLD

RAR

METER

swi

|

HIGH

sw4

9

|.

|

HEADPHONE

|

TRESLE

CONTROL

JACK

3425S

CONTROL

VRS

STEREO

BALANCE

CONTROL

VOLUME

CONTROL

VR4

VRi

VR2

Sw3

TAPE

MONITOR

SWITCHES

Fig.

2

Front

View

POWER

TRANSFORMER

a %

.

BAR

METER

DRIVING

P.C

BOARD

TSO}

FUSE

®.C

BCARD(U)

AMU-2004

MAIN

AMP.

P,.C

BOARD

AMU-2002

HEAT

SINK

AMJ-

20014

aonpdwy

eBeiton

UZ

1Z0N-WY

vu

|

LOUDNESS

P.C

BOARD

PUSH

SWITCH

P.C

BOARD

CONTROL.

P.C

BOARD

BAR

METER

P.C

BOARD

AMU-

2003

AMU-2005

AMU-2007

AMU-2006

Fig.

3

Top

View

19

V.

VOLTAGE

CONVERSION

POWER

TRANSFORMER

AM-U02T-70

AKAT

9070894

<Giion

wae

NOV

AREAS:F1

2.54

|

220V

AREAS:

F2

1.254

}

240V

AREAS:

F3

1.25A

REAR

SIDE

Fig.

4

Voltage

Conversion

(U/T

Model)

Models

for

Canada,

USA,

Europe,

UK,

JPN

and

Australia

are

not

equipped

with

this

facility.

Each

machine

is

preset

at

the

factory

according

to

destination

but

some

machines

can

be

set

to

110

V

220

V

or

240

V

as

required.

If

voltage

change

is

necessary,

this

can

be

accomplished

as

follows.

1)

Disconnect

AC

Power

Cord.

2)

Loosen

holding

screws

and

remove

upper

cover.

?

3)

Remove

existing

line

voltage

fuse

and

insert

re-

quired

line

voltage

fuse

in

proper

fuse

holder,

explicitly

following

instructions

printed

on

rear

panel.

20

Akai AT-K02 User manual

Popular Tuner manuals by other brands