Akai AP-207 Bedienungsanleitung

AP-307

AKAI

DIRECT

DRIVE

FULLY

AUTOMATIC

TURNTABLE

AND

QUARTZ

LOCK

DIRECT

DRIVE

FULLY

AUTOMATIC

TURNTABLE

woo.

AP-207

AP-307

ALSO

APPLICABLE

BLACK

MODEL

SECTION

SERVICE

MANUAL

........---2

eee

eters

SECTION

PARTS

LIST

.........--

22:

eee

SECTION

SCHEMATIC

DIAGRAM

......-.------++->

-...

Il.

ii.

VI.

VII.

VOI.

SECTION

SERVICE

MANUAL

TABLE

CONTENTS

TECHNICAL

DATA

0.22...

eee

putt

eegh

ses

-MODELMAP

207

ete

one

ote

Raa

wee

OSE

oleh,

MODEL

CAR

BOF

casera

Jieeela

wlaee

woe

eed

HONG

Cpe

alate

eletes

DISMANTLING

UNIT...

1.0

ene

CONTROES

Gees

acceso

has

ebm

Ses

Sere

etes

BME

MLR

So Be

Shae

MODEL:

AP-207

i356

ate

aid

Eevee

anaes

MODEEVAP-3O7

bles

eed

BASE

Meee

emp

ese

Lee

PRINCIPAL

PARTS

LOCATION

..........

Lhd

ithe:

yang

Mesiaie

(MODEG.AP-207)

copa

Pete

eek

eae

Bae

Bes

MODEL.

APIS

O07:

22s

sc¢8

tla

hee

ihe

HOS

Vee

eee

eres

BLOCK

DIAGRAM

1...

0.6

tee

eee

eens

Le:

MODDED

AP2207

iieic

gale

age ere

ees

eee

9°

MODEEAP-307)

«ence

cog

CMa

bbe

see

CIRCUIT

OPERATION

00.1.

eee

eens

GENERATS

250.628

ngechee

aie

nethnd.

salar

eos

nee

aap

eke

Mae

tea

aed

SERVO

CIRCUIT

a2.ac

naa

sping

wee

ane

tides

Saw

palatine

STROBE

LIGHT

CIRCUIT

0.0...

eee

MECHANICAL

ADJUSTMENT

......

0...

cee

eee

STYLUS

PRESSURE

ADJUSTMENT

.......

2.0.00

cece

eee

eeee

OVERHANG

ADJUSTMENT

1.0...

eee

SLEEVE

POSITION

ADJUSTMENT

1.2.0...

00...

eee

ARM

LIFTER

HEIGHT

ADJUSTMENT

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

00.00

-eeeee

AUTOMATIC

ARM

CONTROL

ADJUSTMENT

...........-..--5.-

ELECTRICAL

ADJUSTMENT

....

1.0...

cee

eens

Le.

DIRECT

DRIVE

P.C

BOARD

ADJUSTMENT

...............4-.

PLL

P.C

BOARD

ADJUSTMENT

........

Piossatlel

cate

lon

sec ah?

oeaatea

hha

CLASSIFICATION

VARIOUS

P.C

BOARDS

...........00

eee

P.C

BOARD

TITLE

AND

IDENTIFICATION

NUMBER

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

COMPOSITION

VARIOUS

P.C

BOARDS

..............0-.0055

TECHNICAL

DATA

MODEL

AP-207

TURNTABLE

314

aluminium

alloy

die-cast

DRIVE

SYSTEM

Direct

Drive,

Fully

Automatic

MOTOR

Servo

Motor,

Geared

Motor

for

Tone

Arm

Drive

SPEED

PITCH

CONTROL

33-1/3

and

rpm

+2.5%

SPEED

ACCURACY

1,000

+0.15%

WOW

AND

FLUTTER

0.035%

(DIN),

0.025%

(JIS)

RUMBLE

Better

than

(DIN

A),

(DIN

TONE

ARM

Static

balanced

type

with

Anti-skating

Adjuster

ARM

LENGTH

220

STYLUS

PRESSURE

ADJUSTMENT

RANGE

grams

APPLICABLE

CARTRIDGE

WEIGHT

grams

ARM

LIFTER

Oil-damped

OVERHANG

OFFSET

ANGLE

22°30'

HORIZONTAL

TRACKING

ERROR

ANGLE

+2°

SHELL

WEIGHT

7.8

grams

POWER

REQUIREMENTS

120V,

for

U.S.A.

and

Canada

220V,

for

European

countries

240V,

for

U.K.

and

Australia

110

120V,

220

240V

switchable

50/60

for

other

countries

DIMENSIONS

440(W)

158(H)

350(D)

WEIGHT

81kg

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

MODEL

AP-307

TURNTABLE

314

aluminium

alloy

die-cast

DRIVE

SYSTEM

Quartz

Lock

Direct

Drive,

Fully

Automatic

MOTOR

Servo

Motor,

Geared

Motor

for

Tone

Arm

drive

SPEED

PITCH

CONTROL

33-1/3

and

rpm

42.5%

SPEED

ACCURACY

1,000

+0.08%

WOW

AND

FLUTTER

0.035%

(DIN),

0.025%

(JIS)

RUMBLE

Better

than

(DIN

A),

(DIN

MOMENT

INERTIA

230

kg.cm?

TONE

ARM

Static

balanced

type

with

Anti-skating

Adjuster

ARM

LENGTH

220

STYLUS

PRESSURE

ADJUSTMENT

RANGE

grams

APPLICABLE

CARTRIDGE

WEIGHT

grams

ARM

LIFTER

Oil-damped

OVERHANG

OFFSET

ANGLE

22°30'

HORIZONTAL

TRACKING

ERROR

ANGLE

+2°

SHELL

WEIGHT

7.8

grams

POWER

REQUIREMENTS

120V,

for

U.S.A.

and

Canada

220V,

for

European

countries

240V,

for

U.K.

and

Australia

110

120V,

220

240V

switchable

50/60

for

other

countries.

DIMENSIONS

440(W)

158(H)

350(D)

WEIGHT

8.6

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

DISMANTLING

UNIT

TURNTABLE

case

trouble,

etc.

necessitating

dismantling,

please

dismantle

the

order

shown

the

photographs.

Reassemble

reverse

order.

___|

—

BOTTOM

COVER

DUST

COVER

SCREWS

CARTRIDGE

TABLE

SHEET

NOTE:

Photos

dismantling

are

those

AP-307,

but

the

order

applies

AP-207

also.

iil,

CONTROLS

MODEL

AP-207

0.8

MN:

O'e

WUN

MEDEA

OOOOU®

HINGE

TURNTABLE

PLATTER

SPINDLE

TONE

ARM

LIFTER

POSITION

FOR

rpm

ADAPTOR

STYLUS

PRESSURE

SCALE

RING

HINGE

MAIN

WEIGHT

ANTI-SKATING

ADJUSTOR

TONE

ARM

LIFTER

LEVER

DOWN

DISC

SIZE

SELECTOR/MANUAL

START/CUT

REPEAT

LEVER

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.

24,

Fig.

LOCKING

NUT

CARTRIDGE

SHELL

FINGER

LEVER

CARTRIDGE

SHELL

TONE

ARM

TONE

ARM

REST

RUBBER

MAT

OVERHANG

ADJUSTMENT

SCALE

STROBE

MARKINGS

rpm

PITCH

CONTROL

rpm

PITCH

CONTROL

33/45

rpm

SPEED

SELECTOR

-m

BUILT-IN

STROBE

LIGHT

MODEL

AP-307

eee

HINGE

TURNTABLE

PLATTER

SPINDLE

TONE

ARM

LIFTER

POSITION

FOR

rpm

ADAPTOR

STYLUS

PRESSURE

SCALE

RING

HINGE

MAIN

WEIGHT

ANTI-SKATING

ADJUSTER

TONE

ARM

LIFTER

LEVER

DOWN

DISC

SIZE

SELECTOR/MANUAL

START/CUT

REPEAT

LEVER

13,

14,

15.

16.

17.

18.

19.

20.

21.

22.

23.

24.

Fig.

LOCKING

NUT

CARTRIDGE

SHELL

FINGER

LEVER

CARTRIDGE

SHELL

TONE

ARM

REST

TONE

ARM

RUBBER

MAT

OVERHANG

ADJUSTMENT

SCALE

STROBE

MARKINGS

PITCH

CONTROL

SWITCH

QUARTZ

LOCK

SWITCH

33/45

rpm

SPEED

SELECTOR

SWITCH

BUILT-IN

STROBE

LIGHT

IV.

PRINCIPAL

PARTS

LOCATION

MODEL

AP-207

POWER

SUPPLY

PRC

BOARD

(AP

2641)

POWER

TRANS

PHONO

BOARD

(AP-0319)

(T901)

D.D

BOARD

(AP-2642)

MOTOR(DDM~-33D)

saPan

save

bes

AUTO

MECHA

BLK

MICRO

SWITCH

sw902,SW903

TIMING

MOTOR

MICRO

SWITCH

NEON

LAMP

BOARD

(AP-

2643)

Sw90l,

SW904

START

CAM

Fig.3

Bottom

View

MODEL

AP-307

POWER

SUPPLY

BOARD

(AP-

2641)

POWER

TRANS

PHONO

P.C

BOARD

(AP-

0319)

(T901)

D.D

BOARD

(AP-2642

)

AUTO

MECHA

BLK

MOTOR

(DDM-33D)

MICRO

SWITCH

Sw902

,SW903

TIMING

MOTOR

MICRO

SWITCH

SW90!,

SW904

NEON

LAMP

BOARD

(AP-2643)

PLL

BOARD

(AP-3601)

START

CAM

Fig.4

Bottom

View

Vv.

BLOCK

DIAGRAM

MODEL

AP-207

WAVE

MULTI

corre!

PLIER

-CTION)

(2f)

33-1/3

=20Hz

f=27Hz

———

33-1/3

SPEED

SELECTOR

Fig.

MODEL

AP-307

STROBE

CIRCUIT

4.42368MHz

COUNT

DOWN{—>

COUNT

DOWN

COMPARATON

SPEED

QUATZ

Sis

& &

ISeLector

tock

4 § o

SCHMITT

33-1/3

ON—=——

OFF

TRIGGER

B23

R90

LPF

PITCH

CONTROL

Sad

Lea

ELEME

33-1/3

f220H2

45.

t227Hz

amp

CLAMP

BAFFER

HOLE

‘

ELEMENT

Nee

ia.

leh

Fig.

VI.

CIRCUIT

OPERATION

NAND

EXCLUSIVE

GATE

(=ANTI~COINCIDENCE)

GENERAL

The

AP-207

has

D.D

(Direct

Drive)

P.C

Board

(AP-2642)

that

contains

(Frequency

Generator)

the

signal

output

which

controls

the

motor.

The

AP-307

has

PLL

(Phase-Locked

Loop)

P.C

Board

(AP-3601)

addition

the

electrical

circuit

the

AP-207.

The

PLL

Circuit

the

AP-307

consists

Quartz

Lock

Circuit

and

Stroboscope

Circuit.

The

strobe-

scope

circuit

flashes

the

neon

tube

NE901

synchronism

with

the

frequency

which

the

crystal

oscillator

frequency

accurately

counted

down,

while

the

neon

tube

NE901

the

AP-207

activated

the

line

power

flash

the

stroboscope

patterns

the

turntable.

SERVO

CIRCUIT

Operation

when

the

Quartz

Lock

Switch

SW903

OFF

(Refer

the

D.D.

Circuit

schematic

diagram

the

AP-307.)

The

motor

incorporates

coil

that

produces

signal

the

motor

rotates.

The

signal

frequency

for

33-1/3

rpm

and

for

rpm.

The

signal

magnified

through

IC1

8).

The

magnified

signal

clamped

positive

side

R40

and

VR1,

and

enters

IC2

IC2,

the

signal

waveform-shaped

and

fre-

quency-doubled.

The

doubled

signal

fed

IC3

@),

input

Mono

Multi.

The

Mono

Multi

provides

characteristic

that

its

stable

state

inverted

external

trigger

into

the

unstable

state,

where

remains

for

predeter-

mined

time

before

returning

the

original

stable

state.

The

pulse

output

Mono

Multi

IC3

smoothed

which

led

IC1

the

voltage

compared.

When

the

Quartz

Lock

Switch

SW903

off,

reference

voltage

applied

IC1

The

voltage

IC1

compared

with

the

reference

voltage

IC1

@),

and

the

output

appears

at.

IC1

The

output

IC1

passed

through

the

phase

correction

circuit,

consisting

Fig.

thrrough

C11

and

R18

through

R20,

TRI.

TR1

makes

current

flow

through

the

Hall

Elements

and

H2,

which

are

installed

posi-

tion

under

the

rotor

magnet

the

motor.

The

voltage

developed

across

each

Hall

element

proportion

the

current

flowing

through

the

Hall

Elements

and

the

strength

the

magnetic

field

the

rotor

magnet.

The

voltages

output

the

two

Hall

elements

are

supplied

the

motor

drive

amplifier,

consisting

IC4

8),

TR2

and

TR3

and IC4

3),

TR4,

and

TRS,

control

motor

speed.

the

motor

speed

made

late

some

cause,

the

signal

frequency

becomes

lower.

The

width

the

pulse

output

the

IC3

Mono

Multi

becomes

wider.

This

increases

the

comparison

voltage

IC1

which

turn

raises

the

voltage

output

IC1

The

result

increase

the

current

flowing

through

TRI

and

the

Hall

elements

and

H2.

The

current

increase

the

motor

drive

amplifier

make

the

motor

speed

fast.

Operation

when

the

Quartz

Lock

Switch

SW903

(Refer

the

PLL

Circuit

schematic

diagram

the

AP-307)

The

4.42368

MHz

signal

generated

the

crystal

oscillator

delivered

through

TP-1

IC2

@).

The

Flip-Flop

IC2

halves

the

oscillation

frequency

4.42368

MHz.

The

frequency-halved

signal

delivered

clock

pulse

IC3

which

counts

down

1/27

(81.920

Hz)

for

33-1/3

rpm

1/20

(110.592

Hz)

for

rpm

according

set

the

Speed

Selector

Switch

SW902.

The

count-

down

signal,

which

appears

IC3

QQ,

further

counted

down

for

33-1/3

rpm

for

rpm

IC4

This

output

signal

IC4

@®

enters

the

comparison

circuit

ICS

asa

set

pulse.

the

other

hand,

the

signal

fed

through

the

D.D

circuit

the

PLL

circuit

waveform-shaped

the

Schmitt

trigger

IC1

(10

13),

and

fed

through

IC1

and

ICS

the

reset

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