AKA AC-400 Manuale utente

AKAi

SERVICE

fflADUAL

0 0

AC-400

co

0

AC-405K

MINI COMPONENT SYSTEM

AC-400/AC-405K

SR-400

CONTENTS

[AC-400

/

AC-4051<]

SAFETY

INSTRUCTIONS

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

4

INFORMATIONS

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

5

SPECIFICATIONS

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

6

I.

DISASSEMBLY

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

8

II.

PRINCIPAL

PARTS

LOCATIONS

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

9

III.

REPLACEMENT

OF

PRINCIPAL

MECHANICAL

PARTS

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

11

IV.

ADJUSTMENT

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

15

V.

PARTS

LIST

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

19

VI.

WIRING

DIAGRAM

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

33

VII.

BLOCK

DIAGRAM

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

34

VIII.

SCHEMATIC

DIAGRAM

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

38

IX.

PCB

LAYOUT

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

45

X.

INFORMATION

OF

ICs

Ml-COM

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

51

ABBREVIATIONS

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

60

[SR-400]

SPECIFICATIONS

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

64

SCHEMATIC

DIAGRAM

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

64

PARTS

LIST

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

65

3

SAFETY

INSTRUCTIONS

PRECAUTIONS

DURING

SERVICING

1.

Parts

indentified

by

the

A (*)symbol

parts

are

critical

for

safety.

Replace

them

only

with

parts

whose

numbers

are

specified.

2.

In

addition to

safety,

other parts

and

assemblies

are

specified for conformance with such regulations

as

those

applying

to

spurious

radiation.

These

must

also

be

replaced

only

with

specified

replace-

ments.

Examples:RF

converters,

tuner

units,

antenna

selection

switches,

RF

cables,

noise-blocking

capacitor~,

noise-

blocking

filters,

etc.

3.

Use

specified

internal

wiring.

Note

especially:

1)

Wires

covered

with

PVC

tubing

2)

Double

insulated

wires

3)

High

voltage

leads

4.

Use

specified insulating materials for hazardous

live

parts.

Note

especially:

1)

Insulating

Tape

2)

PVC

tubing

3)

Spacers(insulating

barriers)

4)

Insulating

sheets

for transistors

5)

Plastic

screws

for

fixing

micro

switches

5.

When

replacing

AC

primary side components

(trans-

formers,

power

cords,

noise

blocking

capacitors,

etc.),

wrap

ends

of

wires

securely

about

the

terminals

before

soldering.

~

6.

Make

sure

that

wires

do

not contact

heat

generating

parts

{heat

sinks,

oxide

metal

film

resistors,

fusible

resis-

tors,

etc.).

7.

Check if

replaced

wires

do

not

contact

sharply

edged

or

pointed

parts.

8.

Also

check

areas

surrounding

repaired

parts.

9.

Make

sure

that

foreign

objects

(screws,

solder

droplets,

etc,)

do

not

remain

inside

the

set.

MAKE

YOUR

CONTRIBUTION

TO

PROTECT

THE

ENVIRONMENT

Used

batteries

with

the

ISO

symbol

for

recy-

~

cling

as

well

as

small

accumulators

(recharge-

TI

~\)

able

batteries),

mini-batteries

(cells)

and

starter

'O

<:;:,

batteries

should

not

be

thrown

into

the

garbage

can.

Please

leave

them

at

an

appropriate

depot.

All

other

house-

hold

batteries

can

be

thrown

out

with

the

household

waste.

SAFETY

CHECK

AFTER

SERVICING

After

servicing,

make

measurements

of

leakage-current

or

resistance

in

order

to

check

if

exposed

parts

are

accept-

ably

insulated

from

the

supply circuit.

The

leakage-current

measurement

should

be

done

between

accessible

metal

parts

(such

as

chassis,

ground

terminal,

microphone

jacks,

signal

input/output

connectors,

etc.)

and

the earth

ground

through

a

resister

of

1500

ohms

paralleled

with a

0.15µF

capacitor,

under

the unit's

normal

working

condition.

4

The

leakage-current

should

be

less

than

0.5mA

r

ms

AC.

The

resistance measurement should

be

done between

accesible

exposed

metal

parts

and

power

cord

plug

prongs

with the power switch "ON"(if included).

The

resistance

should

be

more

than

2.2Mohms.

PRECAUTIONS

IN

REPAIRING

When

repairing

or

adjusting

the

unit,

please

note

the

follow-

ing

points.

1.

Do

not

put

excessive

pressure

on

the

mechanical

part

(operation

part),

including

the

pick-up

block,

as

extremely

high

mechanical

precision

is

required

in

these

parts.

2.

When

the

base

is

removed

for repair or adjustment,

make

sure

that

there

are

no

metal

objects

between

the

P.C

board

or

the

mecha

parts

and

the

base.

3.

The

Micro-Computer

and

the

CD

signal

processing

ICs

may

be

damaged

by

static electricity

or

leakage

from

a

soldering

iron

during

repairing.

While

soldering,

please

take

the

precautions

against

leakage

as

in

the

illustra-

tion.

,

GND

4.

Do

not

loosen

any

screws

in

the

pick-up block.

Please

refer

to

NOTE

when

replacing

the

pick up

block.

5.

To

avoid

hazardous

invisible

Laser

Radiation,

DO

NOT

look

at

the

Laser

Beam

(Objective

lens)

directly.

6.

On

models

for

some

countries,

laser

warning

labels

are

affixed

on

and

inside of the unit,

as

shown below.

For your safety,

read

these labels carefully before

repairing

or

adjusting

the

unit.

CAUTION

The

use

of controls

or

adjustments

or

the

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation.

[EUROPE,

SCANDINAVIA,

UK

and

AUSTRALIA]

CLASS 1 LASER PRODUCT

KLASSE 1 LASER PRDDUKT

LUOKAN 1 LASER LAITE

KLASS 1 LASER APPARAT

Label

affixed

on

the

rear

panel

of

the

unit

CAUTION:

INVJSllk.ElASERIWMTIONWHEN°"=N

ANO

tNnAl.00(S

DEFEATED AVOID

EXPOIUM:

TO

8EAM

AOVARSEL

: USYNUG LASERSTRAUNO

VED

.....

HINl

KA.A

SIKKEAHED6AFWIYOEAI:

EA

UOE

I#

fUNKT10N

uNDG,i

UD&IIIETTELSE

FOA

STAAI..ING

VARO

:

AVATTAESSA

JA

SUOJAL.UklTUS

OHfTET-

TAESSA

Olfl

ALTTNNA

NAKYMATTOIMlLE

I.MIERSATE~

LYLEE

ALA

KATSO

SATEESEEN 1

VARNING

;()SYNI.IO LASERSTAAl.MNG

MAR

DENNA

DEL

AA

0PPNAO OCH SPAAAEN

AA

UAKOPf'lAO

BETANClA

EJ

STRALEN'

Label

affixed

on

the

CD

MECHA

chassis

INFORMATIONS

SYMBOLS

FOR

PRIMARY

DESTINATION

Alphabet indicates the destination of the units

as

listed

below.

Symbol Prinncipal Destination

[Kl

USA

[[]

UK

rn

Europe(except,

UK)

rn

Australia

[y]

Germany

[[]

Universal

IY*I

Custom version

VOLTAGE

CONVERSION

(

IY]

[Y]

Model

only)

Before connecting the

power

cord, set the

VOLTAGE

SELECTOR

located on the rear panel of the AC-400/AC-

405K so that the correct voltage for your area

is

indicated.

220-230V 240V

110V

[U,

Y]

5

SPECIFICATIONS

[AMPLIFIER

Section]

Power

output

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

30W

+30W(6

ohm,

1

KHz,

10%

THD,

EIAJ)

25W

+

25W(6

ohm,

1

KHz,

1%

THD,

DIN)

Total

harmonic

distortion

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

0.05%(-10dB for

RMS)

Input

sensitivity

AUX

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

400mV/47K

ohms

S/N

ratio

AUX

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

70d8

Channel

separation

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

55d8

[Deck

Section]

Track

system

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

4

track,

2

channel

system

Frequency

response

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

100-12,SOOHz

±

3dB(Normal

tape)

100-12,SOOHz

±

3dB(Cr02

tape)

Wow

&

Flutter

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

0.2%(WRMS)

S/N

ratio(CCIR/ARM)

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

62dB(DOLBY

ON,

Cr02

tape)

52dB(DOLBY

OFF,

Normal

tape)

Total

harmonic

distortion

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

1.0%(Normal

tape,

at

400Hz)

Channel

separation

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

35d8

[General]

Power

requirement

AC-400'

E/V

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

AC

220-230V, 50Hz

B

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

AC

230V,

50Hz

S

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

AC

240\/,

50Hz

U,

Y

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

AC

110/127

/220-230/240V,

50/60Hz

convertible

AC-405K

U,

Y

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

AC

110/127

/220-230/240V,

50/60Hz

convertible

Dimension

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

270(W)

x

280(H)

x

371

(D)mm

Weight

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

9Kg

Power

consumption

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

88W

6

[Tuner

Section]

Frequency

range

FM

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

87

.5-108MHz(50KHz

step)

MW

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

531-1602KHz(9KHz

step)

[E/V

/S/B/U5/Y1

/Y3/Y1]

530-161

0KHz(1

0KHz

step)

[Ua/Y2/Y4]

LW

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

144-288KHz(1

KHz

step)

SW

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

3.8-12.5MHz(5KHz

step)

Sensitivity

FM

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

3µV

(IHF,

THO

3%)

[EXCEPT

V]

5µV

(IHF,

THO

3%)

M

MW

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

700µV

(IHF,

THO

10%)

LW

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

1500µV

(IHF,

THO

10%)

SW

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

30µV

(IHF,

THO

10%)

S/N

ratio(IHF

A

NETWORK)

FM

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

Mono:70dB

Stereo:65dB

MW

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

40dB

LW

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

30dB

SW

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

30dB

Total

H!lrrnonic distortion(at 1

KHz)

FM

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

Mono:0.8%

Stereo:1.0%

MW

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

1.0%

LW

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

1.0%

SW

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

2.0%

Stereo

separation

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

35dB(at 1

KHz)

[Graphic

Equlizer]

Center

frequency

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

63Hz/160Hz/400Hz/1

KHz/2.5KHz/6.3KHz/16KHz

Control

range

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

±8dB(2dB

step)

[CD

Section]

Pick

up

system

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

3

Beam

laser

Sampling

frequency

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

44.1

KHz

Error

correction

system

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

Cross

interleave

reed

solomon

Number of

channels

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

2

Channel

Frequency

response

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

20Hz~20KHz

S/N

ratio

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

90dB

Wow

& flutter

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

Below

measurable

limits

Total

harmonic distortion

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

0.07%

(at

1

KHz)

Channel

separation

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

85dB

(at

1

KHz)

Dynamic

range

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

85dB

(at

1

KHz)

*

For

improvement

purposes,

specifications

and

design

are

subject

to

change

without notice.

7

I.

DISASSEMBLY

1.

REMOVAL

OF

COVER-TOP

FRONT-PANEL

--

----

---

CHASSIS-

BACK

~

.

@--

--

Ulll!!P-!l

-~

0 0

~

~~

~~~~~11~~

~

~~~~~

-----

~~ij~~~~

0

~

----

0-

0o

111111,llll~lllu111111i

~~~~~~~~

-• - 0

~~~~~~~II

------

----

(1

0 0

----

-------

.,,/

-------

-----

.,,/

..,

_,/

"

---- ----

---

/

..,

"'

COVER-TOP

2.

REMOVAL

OF

CD

MECHA

&

CASSETTE

DECK

MAINTENANCE

MECHA-CD

CHASSIS-BACK

CHASSIS-CD

FRONT-PANEL

CHASSIS-

BOTTOM

MECHA-DECK

8

II.

PRINCIPAL

PARTS

LOCATIONS

PCB-KARAOKE

PCB-PHONE

PCB-KEY

PCB-CD

PCB-CDG

MECHA-CD

PCB-FRONT

CHASSIS-

BACK

COVER-TOP

CHASSIS-CD

PCB-VOLUME

PCB-MIC

PCB-LENS

KNOB-VOLUME

9

COVER-RADIATOR

~

RADIATOR-L

/

PCB-VOLTAGE/SELECT /

\

vv

I PCB-PO'w'ER l

PO'w'ER-TRANS

MECHA-DECK

CHASSIS-BOTTOM

\

1/

~

I l

I I

10

AKA AC-400 Manuale utente

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