Akai AP-005 Manuale utente

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1

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SERVICE

MANUAL

PARTS

LIST

AUTOMATIC-TURNTABLE

move.

AP-005

SECTION

1

SERVICE

MANUAL............--

22

eee eee

1

SECTION

2

PARTS

LIST

........

22.20.02

eee

eee

ee

eee

21

SECTION

1

SERVICE

MANUAL

TABLE

OF

CONTENTS

2

ARS

TECHNICAL

DATA

..

2.1...

oc

ee

eens

DISMANTLING

OF

UNIT...

0.0.6.

ee

ce

ee

ARRANGEMENT

OF

PRINCIPAL

PARTS.

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

AUTOMATIC

MECHANISM

ADJUSTMENT...............

1.

LEAD-IN

POSITION

ADJUSTMENT..................

2.

LEAD-OUT

POSITION

ADJUSTMENT

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

<<

PLAYER

CARE

..

CYCLE

CHANGE

(MOTOR

PULLEY

REPLACEMENT)

......

CY

VETRE

OR

STYLUS:

oo

ss

coe

8

Ss

bSetierte

oy

Bie

ses

tng

ha

rc

eee

26:

EY

LUS

CHANGE

tists

cise side

eee

yace

&

eee

eee

oie

eed

ala

te

3.

LUBRICATION

VII.

BLOCK

DIAGRAM

i

1.

TECHNICAL

DATA

1.

TURNTABLE

SECTION

TURNTABLE

300

mm

aluminium

alloy

die-cast

turntable

DRIVE

SYSTEM

Belt

drive

MOTORS

(2)

One

4-pole

hysteresis

synchronous

motor

for

turntable

drive

and

a

geared

motor

for

tone

arm

drive

SPEED

33-1/3

and

45

rpm

WOW

&

FLUTTER

SIGNAL

TO

NOISE

RATIO

WEIGHT

0.05%

WRMS

Better

than

52

dB

1.1

k

grams

2.

TONE

ARM

SECTION

TONE

ARM

Static

balanced

type

stainless

steel

tubular

arm

with

inside

force

canceler

and

lateral

balance

weight

ARM

LENGTH

220

mm

STYLUS

PRESSURE

ADJUSTMENT

RANGE

APPLICABLE

CARTRIDGE

WEIGHT

ARM

LIFTER

OVERHANG

SHELL

WEIGHT

0

to

3

grams

4

to

8

grams

(8

to

12.5

grams

using

sub-weight)

Oil

damped

15

mm

13.5

grams

3.

CARTRIDGE

SECTION

CARTRIDGE

VM

(dual

magnet

type)

Audio

Technica

model

AT-11

with

0.7

mil

spherical

diamond

stylus.

é

FREQUENCY

RESPONSE

15

to

25,000

Hz

OUTPUT

VOLTAGE

4

mV

(1,000

Hz

50

mm/sec)

CHANNEL

SEPARATION

20

dB

(1,000

Hz)

OPTIMUM

STYLUS

PRESSURE

2

grams

REQUIRED

LOAD

IMPEDANCE

47

to

100

k

ohms

WEIGHT

5.5

grams

4.

GENERAL

SPECIFICATIONS

POWER

REQUIREMENTS

CSA

Models

..........:c0cees0e-

120V,

60

Hz

CEE

Models

..........:.c00000064

220V,

50

Hz

Other

Models

.............-..008

110

to

120V/220

to

240V,

50/60

Hz

(Switchable)

DIMENSIONS

440(W)

x

128(H)

x

358(D)

mm

(17.4"

x

50”

x

14.1")

WEIGHT

7.6

kg

(16.7

Ibs.)

NOTE:

For

improvement

purposes,

specifications

and

design

are

subject

to

change

without

notice.

ll.

DISMANTLING

OF

UNIT

In

case

of

trouble,

etc.

necessitating

disassembly,

please

disassemble

in

the

order

shown

in

photographs.

Reas-

semble

in

reverse

order.

ADJUSTMENT

BOTTOM

COVER

TABLE

SHEET

LOOSEN

THESE

SCREWS

SLIGHTLY

TURN

TABLE

ADJUSTMENT

lil!

ARRANGEMENT

OF

PRINCIPAL

PARTS

PROXIMITY

SWITCH

CK

UP

PLATE

ASSY

TIMING

MOTOR

POWER

TRANSFORMER

VOLT

SELECTOR

MICRO

SWITCH

MOTOR

PULLEY

BELT

GUIDE

POWER

TRANSFORMER

PHASE

CAPACITOR

220V

op

iov

240V

i20v

SUPPLY

PC

BOARD

HYSTERESIS

SYNCHRONOUS

MOTOR

AC-4

MAIN

WEIGHT

LATERAL

WEIGHT

INSIDE

FORCE

CANCELLER

PICK

UP

STAND

PICK

UP

ARM

HEAD

SHELL

IV.

AUTOMATIC

MECHNISM

ADJUSTMENT

Fig.

1

HOLE

IN

PANEL

(FOR

ADJUSTMENT)

Fig.

2

1.

LEAD

IN

POSITION

ADJUSTMENT

Remove

the

rubber

plug

which

is

located

on

panel

toward

the

rear

part

of

the

pick-up

arm.

When

the

pick-up

arm

is

moved

from

the

position

shown

in

Fig.

1

toward

the

position

shown

in

Fig.

2

adjustment

screw

(B)

becomes

accessible

through

the

hole

from

which

the

rubber

plug

has

been

removed

as

the

lead-out

position

is

approched.

When

adjustment

screw

(B)

is

turned

clockwise,

lead-in

is

adjusted

further

inward

and

when

turned

counter-clockwise,

further

outward.

Therefore,

adjust

lead-in

position

as

follows:

For

adjusting

toward

inner

circumference

turn

clockwise.

For

adjusting

toward

outer

circumference

turn

counter-clockwise.

NOTE:

1.

When

the

adjustment

screw

is

turned

one

revolution,

the

position

of

the

pick-up

arm

stylus

is

changed

by

about

2

mm.

2.

When

using

the

standard

accessory

car-

tridge,

adjust

so

that

on

a

30

cm

record,

lead-in

takes

place

between

298

and

293,

on

a

25cm

record,

lead-in

takes

place

between

247

and

242¢,

and

on

a

17

cm

record,

lead-in

takes

place

between

173

and

168¢.

(These

diameters

are

measured

with

Center

Spindle

as

center

position.)

3.

After

adjustment,

be

sure

to

re-install

rubber

plug.

2.

LEAD

OUT

POSITION

Remove

the

rubber

plug

which

is

located

on

panel

toward

the

rear

part

of

the

pick-up

arm.

Stationary

the

pick-up

arm

(on

arm

rest)

as

shown

in

Fig.

1.

At

this

position,

adjustment

screw

(A)

becomes

accessible

through

the

hole

from

which

the

rubber

has

been

removed.

When

adjustment

screw

(A)

is

turned

clockwise,

lead-out

will

be

sooner

and

when

turned

counter-clockwise,

lead-out

will

be

delayed.

Therefore,

adjust

lead-in

position

as

follows:

For

adjusting

toward

outer

circumference

turn

clockwise.

For

adjusting

toward

inner

circumference

turn

counter-clockwise.

NOTE:

1.

When

the

adjustment

screw

is

turned

one

revolution,

the

position

of

the

pick-up

arm

stylus

is

changed

by

about

2

mm.

2.

When

using

the

standard

accessory

car-

tridge,

adjust

so

that

on

a

30

cm

or

25

cm

record,

operation

begins

between

115¢

and

109¢@,

and

on

a

17

cm

record,

opera-

tion

begins

between

106¢

and

98@.

(These

diameters

are

measured

with

Center

Spindle

and

Center

Position.)

3.

After

adjustment,

be

sure

to

re-install

rubber

plug.

V.

CYCLE

CHANGE

(MOTOR

PULLEY

REPLACEMENT)

MOTOR

PULLEY

BELT

GUIDE

ALIGN

SET

SPEED

SELECTOR

i

©

33

RPM

POSITION

GROOVE

Fig.

3

50

Hz

and

60

Hz

cycle

change

is

effected

by

changing

the

motor

pulley.

50

Hz

and

60

Hz

differentiation

can

be

determined

by

the

groove

on

the

60

Hz

pulley.

While

viewing

horizontally

as

shown

in

Fig.

3,

install

so

that

the

lower

part

of

the

motor

pulley

brim

and

the

lower

part

of

the

belt

guide

are

lined

up.

Set

speed

selector

to

33

rpm

position,

install

the

belt

and

switch

on

power.

If

a

rumbling

noise

from

the

belt

can

be

heard

and

speed

changing

is

not

smooth,

adjust

installation

position

of

motor

pulley.

Vi.

PLAYER

CARE

ATS-Il

1

LIFE

OF

STYLUS

The

lifetime

of

stylus

is

about

500

hrs.

of

use

(about

1000

30cm

LP

records.)

If

the

stylus

becomes

old,

because

the

record

will

be

damaged

and

tone

quality

will

become

inferior,

be

sure

to

replace

as

soon

as

is

needed.

If

records

on

which

dust

is

allowed

to

accumulate

are

played,

the

stylus

will

wear

especially

fast

and

the

record

surface

will

be

scratched.

There-

fore,

please

be

sure

to

keep

record

clean

by

wiping

and

cleaning

the

record

grooves

with

water

soaked

gauze.

Also

if

dust

adheres

to

the

turntable

sheet

(rubber

mat),

as

this

will

cause

the

record

to

become

dirty

easily,

the

mat

should

also

be

kept

clean.

-.

STYLUS

CHANGE

When

replacing

stylus,

be

sure

that

the

stylus

(ATS-11)

is

inserted

properly

in

the

direction

of

the

arrow

mark

shown

in

Fig.

4

and

fits

into

cartridge

firmly.

Use

only

model

ATS-11

stylus

which

is

for

use

in

model

AT-11

cartridge.

Fig.

5

3.

LUBRICATION

Because

for

rotating

parts

and

parts

which

rub

together

during

operation,

oilless

metal

and

the

best

grease

or

oil

is

used,

your

machine

will

not

need

lubrication

for

some

time.

About

once

per

year,

use

standard

accessory

player

oil

and

apply

one

or

two

drops

to

the

motor

shaft

as

shown

in

Fig.

5.

In

case

you

do

not

have

player

oil,

use

#60

spindle

oil

or

a

high

grade

machine

oil.

If

used

continually

for

business

purposes,

etc.,

oil

about

once

or

twice

per

month.

CAUTION:

Following

lubrication,

because

oil

will

adhere

to

the

drive

belt

and

pulley

and

to

the

turntable

etc.,

wipe

the

oil

off

of

these

parts

with

a

cloth

to

which

a

little

carbon

tetrachloride

or

thinner

(benzine

can

be

also

be

used)

has

been

applied.