Akai AT-K02 Manuel utilisateur

Ce manuel convient aux modèles suivants

1

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STEREO

TUNER

moom

AT-KO2

AKALI

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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

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

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e

eee

euee

2

2.

COMPOSITION

OF

VARIOUSP.C

BOARDS

...........

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cee

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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

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

=

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WV

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£9!

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aa

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SN3S

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WS

sig

Oy

WaA37

aLAW

15

EG)

[2].

W4

dl

W4

191

5

Tuner

P.C

Board

ATK-2001A

Fig.

FREQUENCY

COUNTER

C\

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