Pioneer PL-3000/HB Manuel utilisateur

Ce manuel convient aux modèles suivants

1

Table des matières

Autres manuels Pioneer Platine

Pioneer

Pioneer PL-71 Manuel utilisateur

Pioneer

Pioneer PL-A35 Manuel utilisateur

Pioneer

Pioneer PL-430 WE Manuel utilisateur

Pioneer

Pioneer PL-51A Manuel utilisateur

Pioneer

Pioneer CDJ-2000NXS Manuel utilisateur

Pioneer

Pioneer PL-516 KUT Manuel utilisateur

Pioneer

Pioneer PL-05 Manuel utilisateur

Pioneer

Pioneer PL-560 Manuel utilisateur

Pioneer

Pioneer PZ-115D Manuel utilisateur

Pioneer

Pioneer PL-51 Manuel utilisateur

Pioneer

Pioneer PL-518 Manuel utilisateur

Pioneer

Pioneer PL-Z94 Manuel utilisateur

Pioneer

Pioneer pl-510 KLT Manuel utilisateur

Pioneer

Pioneer pl-930 Manuel utilisateur

Pioneer

Pioneer PL-51 Manuel utilisateur

Pioneer

Pioneer PL-560 Manuel utilisateur

Pioneer

Pioneer PL-50 Manuel utilisateur

Pioneer

Pioneer PL-30-K Manuel utilisateur

Pioneer

Pioneer RX-510 Manuel utilisateur

Pioneer

Pioneer PL-12D Manuel utilisateur

Pioneer

Pioneer PL-500 Manuel utilisateur

Pioneer

Pioneer LD-V4300D Manuel utilisateur

Pioneer

Pioneer PL-71 Manuel utilisateur

Pioneer

Pioneer PL-L50 Manuel utilisateur

Manuels Platine populaires d'autres marques

Gemini

Gemini CDT-05 MKII Manuel utilisateur

Rotel

Rotel RP-820 Manuel utilisateur

Shuman

Shuman MC-250BT Manuel utilisateur

Stanton

Stanton STR8-150 Manuel utilisateur

Audio Technica

Audio Technica AT-LPW40WN Manuel utilisateur

Crosley

Crosley McQueen CR7011-GY Manuel utilisateur

Reloop

Reloop SMP-1 Manuel utilisateur

auna

auna TT-Classic Plus Manuel utilisateur

COMO AUDIO

COMO AUDIO Turntable Analog Manuel utilisateur

Dual

Dual 1009 F Manuel utilisateur

REED

REED Muse3C Manuel utilisateur

AXIOMTEK

AXIOMTEK OPS883-H Series Manuel utilisateur

Vestax

Vestax PDX-a1 Manuel utilisateur

Denon

Denon DP-400 Manuel utilisateur

Dual

Dual 504 Manuel utilisateur

Audio-Techica

Audio-Techica AT-LP60XBT Manuel utilisateur

Goldring

Goldring G99 Manuel utilisateur

Acoustic Signature

Acoustic Signature Typhoon NEO Manuel utilisateur

Service

c

Manual

DIRECT

DRIVE

FULL

AUTOMATIC

STEREO

TURNTABLE

L-3000.....

Y

PIONEER’

PL-3000

MODEL

PL-3000

COMES

IN

FIVE

VERSIONS

DISTINGUISHED

AS

FOLLOWS:

Voltage

Remarks

AC

220V

and

240V

(Switchable)

United

Kingdom

model

(Without

AC

cord

plug)

AC

220V

and

240V

(Switchable)

Europe

mode!

AC

110V,

120V,

220V

and

240V

(Switchable)

General

export

model

AC

110V, 120V,

220V

and

240V

(Switchable)

U.S.

Military

model

AC

120V

only

U.S.A.

model

@

This

service

manual

is

applicable

to

the

PL-3000/HB,

HE.

For

servicing

of

the

other

types,

please

refer

to

the

additional

service

manuals.

CONTENTS

1.

SPECIFICATIONS

.............-020-0008

2

9.1

Schematic

Diagram

.............000,

21

2.

PANEL

FACILITIES

AND

OPERATIONS

.....

3

9.2

P.C

Board

Connection

Diagram

.........

23

3.

BLOCK

DIAGRAM

(IC=PA3006)

...........

5

Q:3:>

(Parts:

List...

46

a8

and

et

Roepe

ead

25

4.

D.D

MOTOR

TROUBLE

SHOOTING

CHART

4.1.

Motor

Fails

to

Rotate

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

6

4.2

Considerable

Wow

and

Flutter

in

Motor

...

7

4.3.

Motor

Runaway

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

8

4.4

Rotational

Speed

Adjustment

..........

8

5.

OPERATION

AND

ADJUSTMENT

OF

TURNTABLE

DRIVE

MECHANISM

5.1

Auto

Leadin.............

000200

ee

9

5.2

Auto-Return

...

2.2...

0.0.2

eee

ee

ees

10

5.3.

Manual

Operation..................

11

5.4)

-Auto-Cuts

occ

Sie

age

ee

Re

wf

aa

ean

11

5.5

Adjustments............--

00

ee

eee

11

6.

DISASSEMBLY

6.1

Base

and

Panel

..........-....0006.

13

6:2:>

MOTOR

waco

Bee

Bo

we

eee

dees

13

6.3.

Sub-panel

Assembly

and

Tonearm

Base....

13

6.4

Tonearm..........

2-0

eee

ee

14

6.5

Push-button

Unit

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

14

7.

EXPLODED

VIEWS

................0-0.

15

7.1.

Sub-panel

Assembly

(PXB-043)

.........

17

FQ?

TONGAN

oie

coe

ea

ee

ee

a

ee

18

7.3.

Motor

Assembly

(PXB-031)

...........

19

Bi

PACKING

dors

foie

eR

th

woe

Pad

Ate

20

9.

SCHEMATIC

DIAGRAM,

P.C

BOARD

PATTERNS

AND

PARTS

LIST

1.

SPECIFICATIONS

Motor

and

Turntable

Drive

System...

0.0.00...

eee

eee

eee

Direct-drive

MOLOP

st

oc

sh

tecaieldd

a.

tatie

ite

is

ene

DC

servo

motor

Turntable

Platter.

. .

310mm

diam.

aluminum

alloy

die-cast

Moment

of

Inertia...

..

220kg-cm?

(including

platter

mat)

Speeds...

wea

Sr

ete

sb

es

33-1/3

and

45rpm

Speed

Control

Range...

.......2200.00000...

42%

Wow

and

Flutter...........

Less

than

0.03%

(WRMS)

Signal-to-Noise

Ratio.

........

More

than

73dB

(DIN-B)

Tonearm

TY

PGs.

eee

sa

ee

Static-balance

type,

S-shaped

pipe

arm

Effective

Arm

Length

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

221mm

OVERMAN

Be

os

eiieca

baie!

Quid

se

Mn

Pete

era

doaely

Bvtleaes

15.5mm

Usable

Cartridge

Weight.........

4g

(min.)

to

9g

(max.)

Subfunctions

Full

auto

mechanism,

Anti-skating

force

control,

Stylus

pressure

direct-readout

counterweight,

Strobe

light,

Free

stop

hinges

Semiconductors

Transistors,

sc

24s

decd

a

dl

4

eit

oe

eee

eee

ee

2

DIGG

eS.

oh

ts

a

dirt

ns

apie

calc

Sins

Doty

7

Hallelements....

0.0.0.0...

0000.

eee

ee

eee

ees

3

ee

RRs

Oe

a

ts

Be

oh

gs

ssScn

Bt

e

deaa

a

tad

a

ah

1

Miscellaneous

Power

Requirements:

PL-3000/HB,

HE

..

220/240V~(switchable),

50,

60Hz

Power

Consumption

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

000

c

cee

e

eee

7W

Dimensions

..........

384(W)

x

145(H)

x

360(D)

mm

15-1/8(W)

x

5-11/16(H)

x

14-3/16(D)

in.

WEIBAE

ais

25

oe

ede

es

4

7.9kg/17

Ib

7

oz

PC-150

Specifications

TY

POs

oi

tad

Pawel

tau

vee

8S

Moving

magnet

type

SEYIUS

0-245

Cerna

4

See

A

ntiee

0.5

mil

diamond

(PN-150)

Output

Voltage..............

3.5mV

(1kHz,

50mm/s

Peak

velocity,

LAT)

Tracking

Force............

1.7g

to

2.5g

(proper

2.2g)

‘Frequency

Response

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

15

to

30,000Hz

Accessories

EP

adaptor

sc.ahdiud.n

eb

aed

phot

bac

a

Gheehane

x

1

Screwdriver...

0.0.0...

2c

cee

cee

ene

eee

]

Operating

instructions

(French

&

German

furnished

on

models

for

HE)

..............000-

1

-

FOR

USE

IN

UNITED

KINGDOM

CAUTION

240V:

MAINS

SUPPLY

VOLTAGE

IS

FACTORY

ADJUSTED

AT

240

VOLTS.

IMPORTANT

The

wires

in

this

mains

lead

are

coloured

in

accordance

with

the

following

code:

Blue:

Neutral

Brown:

Live

As

the

colours

of

the

wires

in

the

mains

lead

of

this

apparatus

may

not

correspond

with

the

coloured

mark-

ings

identifying

the

terminals

in

your

plug

proceed

as

follows.

The

wire

which

is

coloured

blue

must

be

connected

to

the

terminal

which

is

marked

with

the

latter

N

or

coloured

black.

The

wire

which

is

coloured

brown

must

be

connected

to

the

terminal

which

is

marked

with

the

letter

L

or

coloured

red.

The

power

cord

should

be

connected

last,

make

sure

that

the

power

switch

is

off.

Unplug

the

set

from

the

wall

socket

when

it is

not

be

used

for

an

extended

period

of

time.

NOTE:

Specifications

and

design

subject

to

possible

modification

without

notice,

due

to

improvements.

2.

PANEL

FACILITIES

AND

OPERATIONS

SPEED

SELECTOR

BUTTON

45

....

When

this

button

is

depressed,

the

platter

will

rotate

at

45rpm.

Depress

for

playing

45rpm

records,

singles

or

EP’s.

33.

....

When

this

button

is

set

to

the

released

position,

the

platter

will

rotate

at

33-1/3rpm.

Release

for

playing

33-1/3rpm

records

like

LP’s.

SPEED

ADJUSTMENT

KNOB

Turn

this

knob

when

delicately

adjusting

the

speed

of

the

platter.

The

speed

of

platter

will

increase

when

the

knob

is

turned

clockwise,

in

the

direction

of

‘‘+”;

it

will

decrease

when

turned

counterclockwise,

in

the

direction

of

‘‘—”,

For

detailed

instruction,

refer

to

the

section

“ADJUSTING

THE

SPEED

OF

PLATTER”.

STROBE

LIGHT/SPEED

CHECKING

WINDOW

The

strobe

light

comes

on

when

the

START/CUT

button

is

depressed,

and

the

stroboscope

illuminates

the

design

cut

around

the

bottom

face

of

the

turntable.

The

speed

of

the

platter

can

be

checked

by

observing

the

movement

of

markings

through

the

checking

window.

(Refer

to

‘“AD-

JUSTING

THE

SPEED

OF

PLATTER”’).

RECORD

SIZE

SELECTOR

This

selector

selects

the

size

of

the

record

for

automatic

play

and

also

selects

manual

play.

7”

17...

For

the

automatic

play

of

17cm

(7-inch)

LP

and

EP

records.

10”

25...

For

the

automatic

play

of

25cm

(10-inch)

LP

records.

12”°30

..

For

the

automatic

play

of

30cm

(12-inch)

LP

records.

MAN...

For

the

manual

play

of

records.

NOTE:

The

tonearm

will

not

be

actuated

when

the

RECORD

SIZE

SELECTOR

is

at

the

MANUAL

position

for

play,

even

if

the

START/CUT

button

and

the

REPEAT

buttonare

pushed.

REPEAT

BUTTON

Push

this

button

when

you

want

to

listen

to

the

same

record

again.

Press

the

button

once

more

to

release.

NOTE:

All

you

have

to

do

for

repeat

play

is

to

press

the

REPEAT

button.

There

is

no

need

to

push

the

START/

CUT

button

again.

START/CUT

BUTTON

When

this

button

is

depressed,

the

power

is

turned

on

for

the

turntable,

the

strobe

light

comes

on

and

the

platter

starts

to

rotate.

With

the

RECORD

SIZE

SELECTOR

set

at

one

of

the

positions

—

30,

25,

or

17

—

the

tonearm

moves

automatically

to

the

record

disc

as

the

platter

starts

rotation,

thus

starting

record

playing.

If

this

button

is

depressed

while

the

record

is

playing,

the

tonearm

automatically

returns

to

the

arm

rest,

and

the

power

to

the

turntable

will

be

cut

off.

PLATTER/PLATTER

MAT

When

the

tonearm

is

moved

and

power

is

supplied

to

the

turntable,

the

platter

will

start

rotating

at

the

set

rotation

speed.

The

platter

mat

stabilizes

the

records

and

also

absorbs

ex-

ternal

vibration.

ADJUSTING

THE

SPEED

OF

PLATTER

1.

Observe

the

stroboscope

through

the

speed

checking

window.

Four

different

pitches

of

the

markings

are

used

in

the

stroboscope.

The

pitch

varies

with

the

power

line

frequency

and

the

rotating

speed

of

the

platter,

as

shown.

.

Make

sure

one

of

the

four

types

of

stroboscope

markings

is

set

according

to

the

line

frequency

and

the

platter

speed,

and

turn

the

SPEED

ADJUST-

MENT

knob

as

instructed

in

the

following

to

make

adjustment.

@

When

markings

appear

to

stand

still:

The

platter

is

turning

at

the

rated

speed

(33-1/3

or

45rpm),

and

no

adjustment

is

required.

When

markings

appear

to

move

rightwards:

The

speed

of

the

platter

is

lower

than

the

rated

speed.

Turn

the

knob

clockwise

until

markings

appear

to

stand

still.

When

markings

appear

to

move

leftwards:

The

speed

of

the

platter

is

higher

than

the

rated

speed.

Turn

the

knob

counterclockwise

until

the

mark-

ings

appear

to

stand

still.

PL-3000

DUST

COVER

Keep

this

closed unless

operating

the

controls

or

tonearm,

or

changing

over

records.

This

serves

to

keep

dust

from

adhering

to

the

records

during

record

play.

When

fully

opened

and

pulled

straight

up,

this

dust

cover

can

be

removed

from

the

cabinet.

EP

ADAPTOR/ADAPTOR

RETAINER

When

playing

an

EP

record,

fit

this

adaptor

to

the

center

shaft.

When

not

in

use,

attach

it

to

the

adaptor

retainer.

ANTI-SKATE

KNOB

This

knob

is

used

to

cancel

out

the

harmful

skating

force

which

is

generated

during

record

play.

ARM

REST/CLAMPER

The

arm

rest

supports

the

tonearm

when

it is

not

being

used.

Set the

tonearm

on

its

rest

when

it

is

not

playing

records,

Clamp

it

into

position

if

you

don’t

have

any

immediate

plans

to

play

records.

TONEARM

This

tonearm

is

designed

to

‘apply

the

correct

tracking

force

to

the

cartridge

and

to

keep

this

force

at

the

precise

level

for

faithful

tracking

of

the

record

grooves.

OODOD0O00O0

C0

°@

For

45rpm

in

50H2z

area

00000

0

Oo oO

For

33-1/3rpm

in

50Hz

area

For

33-1/3rpm

in

60Hz

area

For

45rpm

in

60Hz

area

3.

BLOCK

DIAGRAM

(IC

=

PA3006)

+Vcc18V

(to

Vec)

i

SWITCHING

CONSTANT

CURRENT

r---

Supply

of

current

WT

VT

VTL

TTD

TM

VTE

WT

WT

DD

Motor

Operation

The

control

circuit

employed

in

the

PL-3000

turntable

is

an

IC

version

of

the

control

circuit

in

the

PXM-030

D.Dmotor

turntable.

Opera-

tion

is

basically

the

same,

and

has

already

been

described

in

the

‘Additional

Service

Manual”

(ART-292

)

for

the

PXM-030.

Position Detector

Hall

Element

Output

and

Coil

Current

4.D.D

MOTOR

TROUBLE

SHOOTING

CHART

4.1

MOTOR

FAILS

TO

ROTATE

Does

18V

register

between

Q,

emitter

and

ground

?

YES

Check

that

external

connections

are

normal

(including

pitch

VRs

and

motor

connector

plug).

YES

Does

6.3V

(to

Vcc)

register

at

pin

no.7

of

PA3006

?

YES

Does

the

voltage

across

pins

6

and

7

of

PA8006

register

3.4V

for

33

rpm,

and

3.6V

for

45

rpm

?

NO

YES

Does

the

voltage

across

pins

4

and

7

of

PA3006

register

2.9V

?

(Connect

the

positive

probe

of

the

multimeter

to

pin

no.4

,

and

the

negative

probe

to

pin

no.7).

YES

Does

the

voltage

across

pins

7

and

9

of

PA38006

register

about

1V

?

(Connect

positive

probe

to

pin

no.9,

|NO

and

negative

probe

to

pin

no.7).

YES

Defective

Q,,

@Q,,

Ds.

or

other

circuit

components

in

the

power

supply

stage.

Defective

PA3006.

Are

the

same

voltage

readings

obtained

when

measuring

after

dis-

connecting

terminal

no.12

of

the

printed

circuit

board

?

Defect

in

the

reference

bias

circuit

consisting

of

R,;~R,,

VR,,VR2,

Di

and

D,.

Defective

PA3006.

Defect

in

the

speed

detector

circuit

consisting

of

Ryg~R,,,C,,C3,

and

D3;~D,.

Deffective

PA3006.

PL-3000

e

Includes

motor

dead

point

e

Rotate

Motor

by

hand.

Do

the

voltages

between

each

of

the

Hall

element

outputs

(pins

11

and

12,

13

and

14,

and

15

and

16

of

PA3006)

register

at

least

0.2V

?

And

are

all

the

DC

levels

at

least

9V

?

Defective

Hall

element.

Turn

the

power

off,

and

measure

the

resistance

between

Vcc

and

pins

18,

19,

and

20

of

PA3006.

(connecting

the

positive

probe

of

the

multimeter

to

Vcc).

Is

a

reading

of

602

+

40

obtained

in

each

case

?

Does

0.8V

register

between

pin

no.17

of

PA3006

and

ground

?

Defective

PA3006

?

Infinite

resistance:

break

in

coil

Resistance

too

low:

shorted

coil

4.2

CONSIDERABLE

WOW

AND

FLUTTER

IN

MOTOR

Check

the

Hall

element

operation

(see@

Turn

the

power

on,

and

rotate

the

turn-

above

under

“Motor

Fails

to

Rotate’’).

table

platter

slowly

(about

1

rotation

in

5

seconds).

Do

the

voltages

at

pins

18,

19,

and

20

of

PA3006

switch

back

and

forth

between

18V

and

1V

?

Check

the

coil

(see

@

and

@

above

under

the

same

‘‘Motor

Fails

to

Rotate”

section).

YES

Defective

diode.

Even

if

only

1

diode

is

defective,

all

3

must

be

replaced

as

a

single

set.

Remove

D;,

D,,

and

D;,

and

check

them

for

normal

conduction

with

the

multimeter).

YES

When

measuring

with

a

wow

and

flutter

meter,

1

deflection

per

revolution

indicates

a

lack

of

mechanical

alignment,

or

defective

shaft

or

shaft

bearing,

1

deflection

per

2

revolutions

indicates

a

defective

shaft

or

shaft

bearing,

while

4

deflections

per

revolution

indicate

defective

capacitors

(C;

~~

C,)

or

PA3006.

4.3

MOTOR

RUNAWAY

Check

power

supply

voltage

and

wiring

connections.

Does

the

voltage

between

pins

6

and

7

of

PA3006

register

about

3.4V

?

Defective

reference

bias

circuit

consist-

ing

of

R,

~

R,,

VR,,

VR,,D,,

andD,,

or

defective

PA3006.

(Refer

to

the

“Motor

Fails

to

Rotate”’

section).

Hold

the

turntable

platter

still

by

hand,

and

measure

the

voltage

at

pin

no.4

of

PA3006.

Does

the

voltage

register

2.9V,

and

then

3.4V

when

the

platter

is

re-

leased

at

33

rpm

?

In

other

words,

does

the

voltage

increase

as

the

rotational

speed

increases

?

Defective

PA3006.

4.4

ROTATIONAL

SPEED

ADJUSTMENT

If

correct

speed

cannot

be

attained

by

adjusting

the

pitch

controls,

adjust

the

motor

in

the

follow-

ing

way.

[

1.

Set

the

pitch

controls

to

the

center

positions.

|

|

—

2

Defective

speed

detector

circuit

consist-

ing

of

Rg

~

R,,,

C,,

C3,

and

D;

~

D,.

.

Turn

the

power

on,

and

adjust

VR,

and

VR,

in

turn

to

obtain

accurate

rotational

speeds

at

45

rpm

and

33-1/3

rpm

respectively

(i.e.

when

stroboscope

appears

to

be

stationary).

Screw

driver

ae

VRi

(33

45

rpm)

VR2

(45

rpm)

Fig.

1

PL-3000

5.

OPERATION

AND

ADJUSTMENT

OF

TURNTABLE

DRIVE

MECHANISM

Feed

plate

Return

lever

Actuator

Microswitch

A

Crank

lever

Microswitch

B

Rotary

cam

Disengage

lever

__]

Short

switch

PU

plate

screw

Selector

plate

Operation

plate

PU

plate

shaft

Lock

lever

Fig.

2.

Drive

mechanism

when

stationary

5.1

AUTO

LEAD

IN

When

the

START

or

REPEAT

button

is

pressed,

power

is

applied

to

the

Timing

motor,

and

the

rotary

cam

commences

to

rotate.

By

the

time

this

cam

has

made

half

a

turn

(commencement

of

record

play),

the

following

operations

will

have

been

completed.

1.

When

the

cam

commences

to

rotate,

micro-

switch

A

is

turned

on

to

start

up

the

DD

motor.

2.

The

crank

lever

coupled

to

the

cam

rotates

the

operation

plate.

3.

The

start

lever

commences

to

move

at

the

same

time

as

the

operation

plate,

resulting

in

the

lock

lever

engaging

the

PU

plate

shaft

(see

Fig,

3-a).

4.

As

the

cam

rotates

further,

the

lock

lever

together

with

the

start

lever

moves

the

tonearm

across

to

the

position

determined

by

the

selector

plate.

5.

The

start

lever

stops

when

it

meets

the

selector

plate

(see

Fig.

3-b

A

point).

6.

Although

the

start

lever

stops,

the

operation

plate

continues

to

rotate,

consequently

releas-

ing

the

lock

lever

from

the

PU

plate

shaft

(the

lock

lever

being

pushed

out

by

contact

with

the

operation

plate

at

point

B).

.

As

the

operation

plate

continues

to

rotate,

the

tonearm

elevation

is

lowered

until

the

stylus

lands

on

the

record

surface

(see

Fig.

5).

Selector

plate

Start

lever

Lock

lever

Fig.

3-a

Fig.

3-b

10.

.

As

soon

as

this

lowering

operation

is

complet-

ed,

the

cam

will

have

completed

exactly

half

a

tum.

Since

the

actuator

drops

into

the

con-

cave

section

of

the

cam,

microswitch

B

(base)

is

turned

off

to

stop

the

Timing

motor.

.

At

the

same

time

that

the

Timing

motor

is

turned

off,

the

switch

shorting

the

cartridge

output

terminal

is

turned

off

(thereby

dis-

connecting

the

muting

circuit).

As

the

record

commences

to

rotate,

the

tone-

arm

is

drawn

across

to

the

center

of

the

record

(Fig.

5).

5.2

AUTO-RETURN

1.

10

As

the

tonearm

approaches

the

lead-out

groove

of

the

record,

PU

plate

screw

presses

against

the

feed

plate,

thereby

moving

the

stopper

towards

the

center

shaft

(see

Fig.

6).

.

Once

the

stopper

snaps

back

by

the

pin

at-

tached

to

the

motor,

microswitch

B

(lower

side)

is

turned

on

by

the

return

lever,

resulting

in

power

being

applied

to

the

Timing

motor

(see

Fig.

6).

Nos.

@

to

@

in

Fig.

6

indicate

the

sequence

of

events

up

until

the

Timing

motor

com-

mences

to

rotate.

.

The

cam

rotating

together

with

the

Timing

motor

also

rotates

the

operation

plate

via

the

crank

lever,

the

cartridge

output

being

shorted

during

this

rotational

operation

by

the

short

switch.

.

Rotation

of

the

operation

plate

activates

the

arm

lifter,

thereby

lifting

the

tonearm

away

from

the

record.

.

The

return

lever

on

the

operation

plate

then

commences

to

return

the

PU

plate

shaft

in

order

to

return

the

tonearm

to

the

arm

rest

(see

Fig.

7).

.

After

the

tonearm

has

been

returned

to

the

arm

rest,

the

rotating

cam

switches

off

the

power

to

the

main

motor,

and

to

all

other

parts

of

the

PL-3000

(microswitch

A

is

turned

off

when

the

upper

side

of

the

actuator

drops

into

the

concave

section

of

the

cam).

Actuator

Short

switch

Microswitch

Fig.

4

PU

plate

shaft

Fig.

5

Fig.

4,

Fig.

5

Drive

mechanism

during

record

play

(Cam

rotated

half

a

turn)

Stopper

Feed

plate

PU

plate

screw

Crank

lever

Microswitch

A

Microswitch

B

|

O

Rotary

cam

Disengage

lever

Fig.

6

Operation

plate

PU

plate

shaft

Return

lever

Fig.

7

5.3

MANUAL

OPERATION

e

Start

by

pressing

START

button

first

1.

Set

the

RECORD

SIZE

SELECTOR

to

the

MANUAL

position.

2.

When

the

START

button

is

then

pressed,

and

the

Timing

motor

commences

to

rotate,

the

operation

plate

will

also

commence

to

rotate,

resulting

in

the

lock

lever

together

with

start

lever

holding

the

PU

plate

shaft.

3.

In

the

same

position

that

the

PU

plate

shaft

is

held,

the

start

lever

meets

the

claw

of

the

selector

plate,

and

consequently

stops.

After

the

operation

plate

rotates

a

little

fur-

ther,

the

operation

plate

shaft

separates

the

lock

lever

from

the

PU

plate

shaft.

4.

Asthe

operation

plate

continues

to

rotate,

the

elevation

pin

drops

down

when

the

sloped

portion

of

the

plate

is

met.

The

Timing

motor

subsequently

stops

when

the

operation

plate

is

pushed

round

as

far

as

it

will

go.

5.

Raise

the

tonearm

by

hand,

and

lower

the

stylus

onto

the

record

to

commence

play.

The

return

operation

in

this

case

is

the

same

as

described

above

under

section

5.2.

e

Start

by

first

moving

tonearm

across

to

the

record

First

lift

the

tonearm

and

move

it

across

to

above

the

record,

and

then

press

the

START

but-

ton.

The

Timing

motor

will

commence

to

rotate,

and

operation

plate

will

start

to

move,

resulting

in

the

tonearm

being

lowered

in

the

same

way

as

de-

scribed

before.

PL-3000

5.4

AUTO-CUT

When

the

CUT

button

is

pressed,

power

is

applied

to

the

Timing

motor,

resulting

in

the

same

sequence

of

events

as

described

in

steps

3

to

6

under

section

5.2.

5.5

ADJUSTMENTS

Prior

to

commencing

any

adjustments,

check

that

the

PU

plate

shaft

moves

along

the

center

axis

of

the

slot

in

the

sub-panel

as

shown

in

Fig.

8.

Fig.

8

e

Tonearm

lowering

position

Tonearm

lowering

position

is

adjusted

by

turn-

ing

an

adjustment

screw

located

in

the

hole

at

the

base

of

the

tonearm

(see

Fig.

9).

Turn

the

screw

clockwise

to

move

the

lowering

position

inwards.

Turn

the

screw

counterclockwise

to

move

the

lowering

position

outwards.

This

adjustment

may

be

simplified

by

using

a

test

record

.

Adjustment

screw

Screw

driver

Lowering

position

Lowerin

ition

°

GiPOsItIO

too

far

in

too

far

out

O)

0)

Fig.

9

11