Akai AT-S55/L Bedienungsanleitung

FM/AM

QUARTZ

SYNTHESIZER

TUNER

mov.

AT=-$55/L

STEREO

INTEGRATED

AMPLIFIER

mopLAM=U55/J

AT-S55/L

AM-U55/J

FM/AM

QUARTZ

SYNTHESIZER

TUNER

moveLAT-S55/L

STEREO

INTEGRATED

AMPLIFIER

mops.

AM-U55/J

THIS

MANUAL

ALSO

APPLICABLE

BLACK

PANEL

MODELS

SECTION

MODEL

AT-S55/L

SERVICE

MANUAL

.....

SECTION

MODEL

AM-U55/J

SERVICE

MANUAL

.....

SECTION

PARTS

EIST

coi

caw

cee

eee

sce

aiwed

SECTION

SCHEMATIC

DIAGRAM

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

aes

<FRRFS

SECTION

SERVICE

MANUAL

MODEL

AT-S55/L

TABLE

CONTENTS

SPECIFICATIONS

1...

cece

cette

eee

teense

eneees

DISMANTLING

UNIT

0...

eee

neces

CONTROLS

oie

S505

Boe

Rpellg

Sid

Sig

dyes

Daye

eae

Sieces:

OOP

PRINCIPAL

PARTS

LOCATION

.......

cece

eee

cence

eee

VOLTAGE

CONVERSION

....

0...

ccc

ete

eee

eee eee

teen

ener

teeta

eens

ADJUSTMENTS

2.0.0...

ccc

cee

eee

cee

eee

eens

(AT-S55L:

MW)

SECTION

ADJUSTMENTS

1...

0.0...

ccc

eee

ees

SECTION

ADJUSTMENTS

2.0...

eee

eens

SECTION

ADJUSTMENTS

0.1...

eee

(aihaing

Rba

aie

ialy

ete

CLASSIFICATION

VARIOUS

P.C

BOARDS

...

0...

eee

eens

P.C

BOARD

TITLES

AND

IDENTIFICATION

NUMBERS

...........

cece

eee

eens

MODEL

AT-S55;

COMPOSITION

VARIOUS

P.C

BOARDS

.........

eee

ees

MODEL

AT-S55L;

COMPOSITION

VARIOUS

P.C

BOARDS

........

cece

eee

ees

For

basic

adjustments,

measuring

methods,

and

operating

principles,

refer

GENERAL

TECHNICAL

MANUAL.

SPECIFICATIONS

TUNER

SECTION

TUNING

FREQUENCY

RANGE

87.4MHz

108.1MHz

USABLE

SENSITIVITY

(300

ohms)

1.9uV

CAPTURE

RATIO

1.3dB

SELECTIVITY

(HF,

400kHz)

65dB

IMAGE

REJECTION

80dB

SUPPRESSION

60dB

SUB

CARRIER

SUPPRESSION

60dB

S/N

RATIO

(MONO/STEREO)

75dB/65dB

T.H.D.

(MONO/STEREO)

STEREO

SEPARATION

(1kHz)

MUTING

LEVEL

TUNER

SECTION

(AT-S55L:MW)

0.1%/0.15%

50dB

TUNING

FREQUENCY

RANGE

USABLE

SENSITIVITY

(BAR)

22dB

530kHz

1,610kHz

for

U.S.A.

and

Canada

522kHz

1,611kHz

for

other

countries

100uV/m

(EXT.)

10uV

SELECTIVITY

(IHF)

30dB

IMAGE

REJECTION

48dB

REJECTION

75dB

S/N

RATIO

55dB

T.H.D.

0.3%

TUNER

SECTION

(AT-S55L

ONLY)

TUNING

FREQUENCY

RANGE

137kHz

362kHz

USABLE

SENSITIVITY

(BAR)

200uV/m

EXT.)

20uV

SELECTIVITY

(IHF

30dB

IMAGE

REJECTION

48dB

REJECTION

75dB

S/N

RATIO

55dB

T.H.D.

0.3%

OUTPUT

SECTION

OUTPUT

LEVEL

(100%

MOD.)

775mV

(30%

MOD.)

250mV

POWER

CONSUMPTION

|_20

Watts

POWER

REQUIREMENTS

120V,

60Hz

for

Canada

and

U.S.A.

220V,

50Hz

for

Europe

except

240V,

50Hz

for

and

Australia

110V/220V/240V,

50/60Hz

internally

switchable

for

the

other

countries

DIMENSIONS

440(W)

105(H)

327(D)

17.3

4.1

12.9

inches

WEIGHT

5.4

(11.2

Ibs)

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

DISMANTLING

UNIT

AT-S55/L

case

trouble,

etc.

necessitating

dismantling,

please

dismantle

the

order

shown

the

photo-

graphs.

Reassemble

reverse

order.

SCREWS

FRONT

PANEL

SCREWS

UPPER

COVER

SCREWS

it.

CONTROLS

mbostwo.

AT-S55

‘AG

T20V

s6OHZ

20W

Fig.

Controls

POWER

SWITCH

12.

BAND

SWITCHES

AND

INDICATORS

PRESET

STATION

KEYS

AND

INDICATORS

13.

ANTENNA

(ANT)

SELECTOR

(AT-S55L

ONLY)

DIGITAL

LED

DISPLAY

14.

AMLOCATION

SELECTOR

SIGNAL

STRENGTH

INDICATORS

15.

LOCATION

SELECTOR

TUNING

INDICATOR

16.

FM/AM

ANTENNA

TERMINALS

FMSTEREOINDICATOR

17.

OUTPUT

JACKS

(LEFT

AND

RIGHT)

TUNING

KEYS

18.

AMFERRITE

BAR

ANTENNA

MODE

SELECTOR

19.

ADAPTER

INPUT

FOR

STATION

MEMORY

PRESET

SWITCHES

AND

INDICATORS

20.

BATTERY

COMPARTMENT

FOR

STATION

MEMORY

10.

RANDOM

TUNING

SWITCH

21.

ACCORD

(CEE,

UK,

SAA:

INLET)

11.

TUNING

MODE

SWITCHES

AND

INDICATORS

IV.

PRINCIPAL

PARTS

LOCATION

|=.“

°-

AT-S55/L

PRESET SWITCH

PCB

NCTION

SWITCH

A3011C5040

oASO1IC5050

POWER

TRANSFORMER

Fig.

Back

View

Front

Panel

BATTERY

BAR

ANTENNA

COMPARTMENT

AM901

AT-S55T

warp

Bp-15SS

LY.

POWER

SWITCH

Swi

POWER

SUPPLY

PCB

A3011B5030

CSA,

AAL

A3011C5060

A30I1B5080

CEE,

,SAA

A3011B5090:

U/T

Fig.

Top

View

VOLTAGE

CONVERSION

REAR

SIDE

POWER

SUPPLY

PCB

{

Woo

POWER

TRANSFORMER

FRONT

SIDE

110V

AREA

400mA

250V

220V

AREA

200mA

250V

240V

AREA

200mA

250V

Fig.

Voltage

Conversion

(U/T

Model

Only)

Models

for

Canada,

U.S.A.,

Europe,

UK,

and

Australia

are

not

equipped

with

this

facility.

Each

machine

preset

the

factory

according

desti-

nation

but

some

machines

can

set

110V,

220V

240V

required.

voltage

change

necessary,

this

can

accomplished

follows.

Disconnect

Power

Cord.

Loosen

holding

screws

and

remove

upper

cover.

Remove

existing

Line

Voltage

Fuse

and

insert

required

Line

Voltage

Fuse

thé

proper

fuse

holder.

VI.

ADJUSTMENTS

AT-S55/L

BAR

ANTENNA

CORE

LOW

RANGE

SENS.

TC!

TC3

FM_HIGH

RANGE

SENS

Tcl

TC2

TC3

FRONT

END

OKB)

REE

RUNNING

STEREO

SEPARATION

(E_7~NS

©)

raeizzne

(®)

VR5(22KB)

(LEFT)

T3(BLK)

PILOT

SIGNAL

CANCEL

wate.

aps

LED

SENS.

7Z\\

VR7(22KB)

sit

T2-a

:CENTER VOLTAGE

;

T2~b:

DISTORTION

T2-a

T2-b

Fig.

Tuner

P.C

Board

A3011A5010

and

Bar

Antenna

(AT-S55)

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