Akai AP-002 Bedienungsanleitung

-AKAI

SEMLAUTOMATIC

woo

AP=-OO2

—

ALSO

APPLICABLE

MODEL

AP-OG2D

“

SEMI-AUTOMATIC

TURNTABLE

moveL

-002

ALSO

APPLICABLE

MODEL

AP-002D

SECTION

SERVICE

MANUAL

..............020

0204

SECTION

PARTS

LIST

...........0

0.00

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Il.

IH.

IV.

VI.

VII.

SECTION

SERVICE

MANUAL

TABLE

CONTENTS

SPECIFICATIONS

ices

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DISMANTLING

UNIT

0.2.0.0

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AUTOMATIC

RETURN

MECHANISM

.......

00.2

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teens

AUTOMATIC

RETURN

2...

INOPERATIVE

PITCH

1.0...

cee

eee

eens

FORCE

(MANUAL)

CUT...

VARIOUS

ADJUSTMENT

.........

ccc

cee

eee

tees

(1)

RETURN

POSITION

ADJUSTMENT

10...

cece

eee

ee ee

eee

(2)

CYCLE

CHANGE

(MOTOR

PULLEY

CHANGE)

.........

0.0

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PLAYER:

CARE

69:68

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LIFE

NEEDLE

(STYLUS

TIP)

2.0...

NEEDLE

CHANGE

...

1...

tee

eee

LUBRICATION:

fice

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Seed

ele

PEER

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BLOCK

DIAGRAM

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ADJUSTMENT

CHART

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Il.

SPECIFICATIONS

MODEL

AP-002

AP-002D

TYPE

Belt

drive,

automatic

return

Belt

drive,

automatic

return

CARTRIDGE

M.M

type,

APC-2

(VM)

M75B/2

OUTPUT

VOLTAGE

2.2

4.4

mV,

2.2

6.0

1000

Hz,

mm/sec

1000

Hz,

mm/sec

FREQUENCY

RESPONSE

25,000

20,000

CROSS

TALK

Better

than

dB,

Better

than

dB,

1,000

OUTPUT

BALANCE

Within

2.5

COMPLIANCE

8x10

®cm/dyne

20x10

°cm/dyne

STYLUS

PRESSURE

2.5

gr+15%

2.5

gr+15%

STYLUS

TIP

0.5

mil

diamond

tip

(APN-2)

0.6

mil

diamond

tip

(N75B/2)

10.

TONE

ARM

Static

balanced

type

tubular

arm

with

Static

balanced

type

tubular

arm

with

in-

inside

force

canceller

and

lateral

balance

gide

force

canceller

and

lateral

balance

weight

11.

MOTOR

4-pole

synchronous

motor

4-pole

synchronous

motor

12.

TURNTABLE

300

aluminum

alloy

diecast

300

aluminum

alloy

diecast

13.

REVOLUTIONS

33-1/3,

r.p.m.

33-1/3,

r.p.m.

14.

WOW

FLUTTER

Less

than

0.15%

Less

than

0.15%

15.

S/N

RATIO

Better

than

Better

than

16.

POWER

CONSUMPTION

Less

than

17W

Less

than

17W

17.

DIMENSIONS

442(W)x185(H)x377(D)mm

(17.4"°X7,3"'*14.8')

503(W)x185(H)x410(D)mm

(19.8°x7.3"x16.1"')

18.

WEIGHT

(15.4

Ibs.)

(17.6

Ibs.)

Il.

DISMANTLING

UNIT

case

trouble,

etc.

necessitating

disassembly,

please

disassemble

the

order

shown

photographs.

Re-

assemble

reverse

order.

TABLE

SHEET

SCREWS

MECH.

BLOCK

Loosen

thise

Screws

only

slightly

Hl.

AUTOMATIC

RETURN

MECHANISM

RETURN-LEVER

CRANK-LEVER-ASSY.

(6)

STOPPER-GEAR(7)

MAIN-GEAR(3)

HOLDER-BALL

(8)

STEEL-BALL(7)

cLutcH-assy.(4)

SHAFT-ASsv.(1)

TRIP

(5)

PLATE-REVECT

(2)

POLE-REUECT

(15)

((2)MINI-Sw.

PLATE-PU-ASSY

(©)

PLATE-ELEvate

(8)

AUTO-LEVER

@3)Pick-uP-ARM

(4)

PLATE-REJECT

(13)

PLaTE-

JOINT

Fig.

MAIN

PARTS

AUTOMATIC

MECHANISM

SOUND

GROOVE

TRANSPORT

GROOVE

WIDTH

BETWEEN

PERTORMDNCES.

LEAD-OUT

GROOVE

PITC

DIAMETER

—>

LAST

GROOVE

DIAMETER

———>

LAST

SOUND

GROOVE

The

return

mechanism

this

machine

shown

Fig.

Because

the

use

“speed

displacement

type”

perception

equipment,

when

the

program

(performance)

ends,

and

the

pick

needle

advances

lead-out

groove,

the

perception

equipment

operates

regardless

disc

size

(in

case

JIS

specification

equivalent).

That

say

that

because

the

speed

displacement

type

perception

equipment

operates

with

100%

certainty,

the

proper

type

record

becomes

important.

There

are

several

different

specifications.

For

instance,

domestic

JIS,

and

foreign

IEC,

RIAA,

etc.,

but

this

machine

designed

operate

per

JIS

specifications.

Below

summary

JIS

record

dimensions

necessary

for

automatic

return.

Transport

groove:

transport

groove

diameter

within

230

mm,

and

this

pitch

transport

width

within

mm.

Lead-out

groove:

Lead-out

groove

pitch

and

linkage

made

the

last

groove

than

one

revolution.

Last

groove:

Last

groove

always

linked

from

lead-out

groove

concentric

circle.

RECORD

TYPE

HEADING

r.p.m.

Last

Sound

Groove

Diameter

than

106

than

106

than

115.2

than

115.2

|Last

Groove

Diameter

97+1

9741

106.4+0.8

106.440.8

gear

the

same

the

pitch

MAIN

GEAR

(3)

installed

the

SHAFT

TABLE

ASSY

(1)

and

here

plectrum-like

part

projects

from

this

part.

Because

this

plectrum

for the

purpose

picking

the

timing

CLUTCH-ASSY

(4)

installed

the

MAIN-GEAR

(3)

rotates

with

the

turntable

during

record

performance.

AUTO

LEVER

(9)

linked

the

PLATE-PU-ASSY

(10)

which

directly

connected

the

pick

arm,

and

TRIP

(5)

begins

pressed

from

about

the

time

stylus

tip

reaches

the

lead-out

groove.

The

move-

ment

this

AUTO-LEVER

(9)

about

1/6

relation

the

movement

the

stylus

tip.

RETURN

LEVER

(11)

linked

MAIN

GEAR

(3)

CRANK

LEVER

ASSY

(13)

and

reciprocal

motion

accordance

with

MAIN

GEAR

(3)

revolutions.

Then

the

““”slanted

portion

(hatching),

PLATE

ELEVATOR

(16)

raised

and

the

lifter

(at

mark

position)

elevated

and

the

arm

returned

the

arm

rest.

Further,

because

current

ON-OFF

switch

MINI-

(12)

installed

RETURN

LEVER

(11),

this

switch

operates

automatically

stop

turn

table

rota-

tion

when

the

pick

arm

returned

the

arm

rest.

Because

STOPPER

GEAR

(7)

controls

the

revolving

motion

MAIN

GEAR

(3),

operates

stop

rota-

tion

that

the

tooth

gap

part

comes

standstill

established

position

near

TABLE

SHAFT

ASSY

Q).

Also

case

the

record

stopped

during

performance,

PLATE,

JOINT

(13),

PLATE

REJECT

(14)

and

POLE

REJECT

(15)

are

intervened

the

forward

motion

CAM

REJECT

LEVER,

PLATE

REJECT

(2)

oper-

ates,

and

CLUTCH

ASSY

(4)

pushed

out.

AUTOMATIC

RETURN

shown

Fig.

when

the

pick

arm

moves

the

record

surface,

the

PLATE-PU

ASSY

(10)

which

directly

connected

the

arm

shaft

separates

from

MINI

(12),

power

source

turned

ON,

and

the

turntable

rotates.

the

pick

stylus

tip

traces

the

recorded

groove

the

record,

AUTO

LEVER

(9)

also

advances

the

inner

side

proportionately.

Be-

cause

this

AUTO

LEVER

advances

the

STEEL

BALL

(17)

HOLDER

BALL

(8)

rolls,

movement

ex-

tremely

smooth

and

there

almost

influence

extended

pick

arm

side

pressure.

due

time

the

pick

stylus

finishes

sound

groove

tracing

and

about

the

time

enters

the

lead-out

groove,

the

tip

AUTO-LEVER

(9)

begins

push

the

skirt

part

TRIP

(5)

and

the

CLUTCH

ASSY

(4)

which

rides

lightly

this

part

pushed

out

toward

the

TABLE

SHAFT

ASSY

(1)

(shown

Fig.

when

the

pick

stylus

about

126

position

from

the

turntable).

this

condition,

the

protruding

part

the

gear

TABLE

SHAFT

ASSY

(1)

drawn

CLUTCH

ASSY

(4)

and

the

MAIN

GEAR

begins

rotate

(Fig.

6).

now

MAIN

GEAR

(3)

had

been

held

standstill

STOPPER

GEAR

(7)

and

smooth

stop

effected

the

teeth

gap,

but

when

the

condition

Fig.

assumed

the

teeth

begin

mesh

together

and

rotating

motion

begins.

Then

shown

Fi.

this

motion

means

CRANK

LEVER

ASSY

(6)

moves

RETURN

LEVER

(11)

the

direction

the

arrow,

and

PLATE

ELEVATOR

(16)

raised

and

the

lifter

elevated.

When

pick

arm

elevatin

complete,

shown

Fig.

the

part

indicated

broken

line

RETURN

LEVER

(11)

hits

the

cunion

part

attached

the

tip

PLATE

ASSY

(10)

and

pick

arm

return

commences.

When

the

piick

arm

returns

the

rest,

the

RETURN

LEVER(#1)

means

CRANK

LEVER

(6)

moves

the

oppsite

direction

(broken

arrow

mark),

PLATE

ASSY

(10)

returns

former

position,

and

due

car

rse

approaching

MINI

(12)

operated

and

the

pwer

source

turned

OFF

that

the

condition

Fg.

re-assumed.

INOPERATIVE

PITCH

can

seen

the

JIS

specification

summary

above,

record

sizes

entail

kinds

specifications,

and

these

are

classified

into

categories

which

are

directly

automatic

return.

These

are

and

25/30

dimensions.

For

perception

return

position

there

two

kinds

records,

the

case

in-

operative

part

gear

(less

than

mm)

the

operating

principle

the

perception

equipment

follows:

record

the

last

sound

groove

trace

the

vicinity

110%.

However,

record

the

sound

groove

has

already

ended

the

vicinity

110%

and

the

stylus

has

passed

the

lead-out

groove

and

moving

the

last

groove

(concentric

circle)

about

this

time

(1.8

radius).

Therefore,

when

the

pick

arm

comes

this

vicinity,

record,

return

operation

must

com-

mence,

and

record,

the

last

trace

must

yet

effected.

The

difference

circumstances

these

two

records

lie

the

volume

movement

the

stylus

advancement

within

one

single

revolution.

the

case

record,

because

this

pitch

very

limited

(less

than

mm),

satisfactory

the

CLUTCH

ASSY

kicked

back

the

protruding

part

the

TABLE

SHAFT

ASSY

shown

Fig.

each

time

the

record

makes

one

revolution.

For

details

this

kicked

back

condition,

refer

Fig.

11.

The

gamma

(y)

(kick

back

volume)

about

0.6

m/m

and

record

even

with

transport

pitch

mm,

the

CLUTCH

ASSY

cannot

retrieve

this

kicked

back

portion.

Regardless

how

many

times

the

record

rotates,

the

transport

pitch

less

than

and

the

clutch

assembly

continues

kicked

back.

(Fig.

12)

(Even

the

record

traced

about

97%

vicinity

(outside

specifications),

the

transport

pitch

less

than

mm,

return

will

definitely

not

effected

during

the

performance),

(this

occurs

only

when

the

TRIP

pushed).

However,

because

practically

all

marketed

records

are

JIS

equivalent,

when

the

stylus

advances

about

106%

vicinity

and

moves

the

lead-out

groove,

the

transport

pitch

suddenly

increases

mm).

When

this

happens,

the

CLUTCH

ASSY

movement

which

now

could

not

retrieve

the 0.6

kick

back

volume

suddenly

increased

(over

1.2

mm),

and

the

revolution

when

the

protruding

part

ap-

proaches,

meshing

takes

place

and

return

begins.

this

manner

the

“speed

displacement

type

return

mechanism

utilizes

the

operating

pitch

and

regardless

whether

the

record

cm,

return

effected

the

end

record

performance.

FORCE

(MANUAL)

CUT

When

listening

record

and

you

wish

stop

the

middle

performance,

when

playing

record

not

according

specifications,

and

the

stylus

tip

has

advanced

the

last

groove,

simply

bring

the

cut

lever

forward.

This

moves

PLATE

REJECT

which

pushes

PLATE

JOINT

(13),

then

POLE

REJECT

(15)

and

ultimately

CLUTCH

ASSY

(4)

pushed

shown

Fig.

13.

mark).

Then

return

operation

commences

and

the

power

source

turned

OFF

(Refer

Item

above

and

Fig.

5).

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