Pioneer PL-55X Manuel utilisateur

STEREO

TURNTABLE

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<ART

SPECIFICATIONS

PARTS

AND

THEIR

FUNCTIONS...

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OPERATION

MOTOR

AND

MECHANISM

CONTENTS

3.1

RASEOR

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SOS

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OSE

SEN

AUER

CEOS

3.2

Prior

Start

Playing

........-

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3.3

Return

Operation...

...

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3.4

Stopping

Under

Manual

.......

06.

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ADJUSTMENT

4.1

Tonearm

Will

Not

Return

The

Arm

Rest

.....

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eect

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4.2

Tonearm

Returns

The

Arm

Rest

Before

The

Record

Finishes

..........+..5:

4.3

Tonearm

Return

Speed

Incorrect

20...

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tes

4.4

Tonearm

Stops

before

Reaches

The

Arm

Rest

.....

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4.5

Tonearm

Hits

The

Inside

The

Arm

Rest.

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4.6

Tonearm

Bounds

The

Arm

Rest

.....

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tee

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eens

4.7

Arm

Elevator

Will

Not

Move

Correct

Speed

......

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ere

eens

Turntable

Will

Not

Turn

Stop...

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teen

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eens

4.9

Adjustment

The

Shorting

Switch

Contacts

.......-

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nees

4.10

Adjustment

Procedure

.......

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4.11.

Adjustment

Motor

Speed

and

Line

Voltage

Selector

f.0.4

5.2

eas

creed

ius

SCHEMATIC

DIAGRAMS

AND

P.C.

BOARD

PATTERN

5.1

Schematic

Diagrams

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5.2

Power

Supply

Circuit

Assembly

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EXPLODED

VIEW

6.1

COTteHtS

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SON

ROSE

PIU

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6.2

Main

Panel

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6.3

Auto

Return

Assembly

(PXA-056)

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teen

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ees

6.4

Speed

Selector

Assembly

(KXA-766)

«ee

tet

tee

tts

6.5

TOROAR

)2ead

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Gee

ete

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ater

Slee

TRU

Nase

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See

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SES

6.6

Circuit

Board.

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Boeken

Wee

ane

WHE

TES

Slee

eds

6.7

Anti-Skating

Assembly

(KXB-216)

6...

eee

ete

eee

tes

6.8

PU-Plate

Assembly

(PXA-065)

eee

eens

6.9

Power

Supply

Circuit

Assembly

(KWR-033)

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6.10

Start

Lever

Assembly

(KXA-761)

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6.11

Upper

Board

2.0...

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6.12

Under

Board

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6.13

Packing

Method

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6.14

Accessory

Case...

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SPECIFICATIONS

Motor

and

Turntable

Motor:

Brushless

servo

motor

Turntable

Drive:

Direct-driven

Speed:

Two

speeds,

33-1/3,

rpm

Wow

and

Flutter:

0.05%

(WRMS)

less

S/N:

58dB

(in

case

using

Pioneer

cartridge

model

PC-50)

Turntable

Platter:

31cm

diam.

Aluminum-diecast

alloy

Tonearm

Type:

Static

balance,

S-shaped,

pipe

arm

Effective

arm

length:

221mm

Usable

Cartridge

Weight:

(MIN)

14g

(MAX)

Overhang:

15.5mm

Subfunctions

Automatic

Return

Tonearm

System

Skating

Force

Canceler

Viscous-damped

arm

elevation

Plug-in

type

Light

Aluminum

Head

Shell

Dust

Cover

with

Free

Stop

Hinges

Wooden

Base

with

Anti-acoustic

Feed

back

Suspension

Strobolight

Accessories

Weight

Plate

(cartridge

weight

adjustable)

Cartridge

Mounting

Screws

Cartridge

Mounting

Nuts

Cartridge

Mounting

Washers

rpm

Record

Adaptor

Screwdriver

Sub

weight

Overhang

Gauge

Connection

Cord

Operating

Instructions

Miscellaneous

Power

Requirements:

220V

50/60

Power

Consumption:

5.2W

(MAX)

Outer

Dimensions:

480(W)

410(D)

185(H)mm

18-7/8(W)

16-1/8(D)

7-5/16(H)

in.

Weight:

11.3

24Ib

oz.

NOTE:

Specifications

and

the

design

subject

possible

modifi-

cation

without

notice

due

improvements.

PARTS

AND

THEIR

FUNCTIONS

Stroboscope

———__—_---

—--

Refer

the

accompanying

illustration

for

positioning

the

strobo

respect

the

line

frequency

and

turntable

speed.

moving

the

function

lever

from

OFF

ON/UP

and

DOWN,

strobolight

lit.

STROBOSCOPE

STROBOLIGHT

Cartridge

Stylus

Cover

Bring

the

cartridge

stylus

cover

into

position

when

the

PL-55X

not

use

shown

the

accompanying

illustration.

rpm

Record

Adaptor

rpm

record

adaptor

supplied

the

accessory

group,

which

permits

rpm

records

with

large

center

holes

played.

Function

Lever

ON/UP

The

turntable

driven.

moving

this

lever

from

DOWN

this

position,

the

tonearm

(stylus)

lifts

slowly

from

the

record

surface,

thereby

interrupting

operation.

DOWN

The

tonearm

brought

into

position

over

the

record.

Setting

the

lever

this

position

gently

lowers

the

stylus

onto

the

record.

Playing

starts

this

time.

OFF

Moving

the

lever

this

position

from

DOWN

causes

the

tonearm

lift

and

return

the

arm

rest.

Power

cut

off

and

the

turntable

stops.

NOTES:

moving

the

function

lever

from

DOWN

OFF

pause

the

ON/UP

position

until

the

lifts

from

the

record.

Failure

may

allow

the

stylus

bounce

against

the

record

and

drag

acrossit.

Also

once

you

have

moved

the

function

lever

DOWN

you

cannot

immediately

return

OFF

ON/UP.

Wait

until

the

tonearm

has

floated

dytwn

the

record

and

begun

play.

Only

the

playing

may

interrupted.

—

Arm

Rest

The

arm

rest

supports

the

tonearm.

The

tonearm

should

always

sit

the

arm

rest

when

record

not

use.

Ordinarily,

the

arm

clamp

should

engaged

lock

the

tonearm

place

the

rest.

ARM

CLAMP

Fine

Speed

Adjustment

Knob

With

the

turntable

operating

33-1/3

rpm,

make

fine

speed

adjustment

while

observing

the

stroboscope.

Turning

the

knob

the

(+)

(clockwise)

direction

in-

creases

speed

while

turning

the

(—)

(counterclock-

wise)

direction

decreases

speed.

Marks

the

turntable

must

appear

“‘stand

still’

under

strobolight,

indicated

correct

speed.

33-1/3

rpm

—

33-1/3

rpm

Speed

Switch

Push

this

switch

33-1/3

rpm

records

are

played.

—

rpm

Speed

Switch

Push

this

switch

for

rpm

operation.

33-1/3

rpm

PL-55X

OPERATION

Operation

the

PL-55X

uncomplicated.

Use

the

following

procedure.

Place

the

record

played

the

turntable.

Move

the

cartridge

stylus

cover

out

position.

Release

the

arm

rest

clamp.

Move

the

function

lever

from

the

OFF

position

the

ON/UP

position.

this

time,

the

turntable

begins

turn.

4,Push

the

speed

button

(33-1/3

rpm)

corresponding

the

speed

the

record

played.

With

the

strobolight

on,

adjust

the

fine

speed

control

until

the

turntable

appears

“stand

still’.

Turning

this

control

the

(+)

direction

raises

the

speed,

while

turning

the

(—)

direction

decreases

the

speed.

After

the

speed

has

been

set

the

proper

value,

carefully

move

the

tonearm

into

position

over

the

lead-in

record

grooves

played.

Set

the

function

lever

DOWN.

The

tonearm

drops

gently

the

record

grooves

and

playing

begins.

stop

playing

intermediate

point,

move

the

function

lever

the

ON/UP

position.

operation

suspended,

move

the

function

lever

the

OFF

position.

(This

action

returns

the

tonearm

the

arm

rest

and

stops

the

turntable).

Upon

completion

playing,

the

tonearm

re-

turns

automatically

the

arm

rest

and

the

turntable

stops.

The

function

lever

returns

auto-

matically

the

OFF

position.

OPERATION

MOTOR

3.1

MOTOR

Construction

motor

control

for

the

PL-35X

depicted

Fig.

Applying

power

sets

the

oscillator

into

opera-

tion,

Output

this

circuit

passes

the

pole

position

detecting

circuit

(L1

L6).

Here,

assume

that

coupling

between

Lil

and

the

tightest.

Voltage

induced

L+

rectified

and

applied

Q106/Q109

the

driver.

.Q109

turn

conducts

and

causes

current

flow

the

associated

drive

coil

(A-1).

The

rotor

moves

the

direction

shown

arrow

Fig.

The

magnetic

pole

affixed

the

rotor

induces

voltage

proportional

rotor

movements,

the

sensing

coil

(A-4).

Voltage

induced

A-4

rectified

diode

the

speed

sensor

and

applied

Q103

the

control

stage.

This

point

also

fed

from

the

reference

voltage

generator

(voltage

Es)

through

fine

speed

control

pot.

Voltage

applied

the

base

Q103

the

control

stage

controls

current

that

flows

Q104.

.Q104

serves

constant

current

source

for

Q106

through

Q111

the

driver

and

therefore

controls

current

flow

the

drive

coils.

DETECTOR

AND

MECHANISM

Pole

Position

Detector

Fig,

shows

simplified

view

the

drive

sense

cous.

With

power

applied

and

coupling

between

and

high,

Q1LO9

causes

current

flow

through

A-l.

Asa

result,

the

rotor

end

coil

A-1

becomes

south

pole

($1)

and

attracts

N1.

The

rotor

moves

the

direction

shown

arrow.

Coupling

factor

between

and

increases

and

Operation

Q110

causes

current

flow

coil

A-2.

Pole

attracts

pole

and

rotor

rotation

continues.

the

same

manner,

attracts

Pole

N3.

Continuation

this

process

causes

the

rotor

turn

steady

basis.

and

ROTOR

DIRECTION

ROTATION

POLE

POSITION

When

ambient

temperature

change

causes

driver

DETECTOR

Fig.

current

rise,

the

speed

rotation

increases

above

the

rated

value.

Q104

current

increases

and

Q106

Q111

currents

decrease.

result,

the

speed

rotation

falls

off.

CONTROL

STAGE

33's9

ty”

—

Qroz

Qior

OSCILLATOR

REFERENCE

VOLTAGE

GENERATOR

cK)

ia-1

G&S

a-a

Ley

—H—

Maen

Soe]

(ESE

|_|

«)

la-3

Sa-

Qios

wen

Qui

Fig.

POLE

POSITION

DRIVER

DRIVE

SENSING

SPEED

SENSOR

COILS

3.2

PRIOR

START

PLAYING

After

the

tonearm

has

been

swung

into

place

for

Moving

the

FUNCTION

lever

the

DOWN

the

start

playing

the

record,

moving

the

position

turns

plate

(1)

still

further

through

link

FUNCTION

lever

the

ON/UP

position

causes

(1).

Pawl

(2)

engages

plastic

arm

(1).

plate

(1)

turn

through

connecting

link

(1)

The

arm

elevator

riding

the

cam

portion

the

point

which

pawl

(1)

engages

plastic

arm

plate

(2)

drops,

lowering

the

tonearm

onto

the

(1).

record.

Plate

(2)

turns

along

with

plate

(1),

through

Pawl

(3)

plate

(2)

applies

pressure

plastic

action

interconnecting

spring

(1).

Upon

com-

arm

(2),

that

there

interference

pletion

this

action,

the

microswitch

actuator

motion

the

stop

required

for

automatic

released,

thereby

applying

power

the

phono

return

operation.

motor.

The

turntable

begins

revolve.

PLASTIC

ARM(1)

PLATE(1)

MICROSWITCH

ACTUATOR

LINK(1}

FUNCTION

LEVER

PLASTIC

ARM

PLASTIC

ARM(2)

Fig.

interference

movement

plastic

(

arm.

anit

Cam

action

allows

tonearm

crop.

PLATE(2)

Fig.

3.3

RETURN

OPERATIONS

When

the

tonearm

going

come

the

inside

(end)

the

record,

the

pick-up

lever

applies

pressure

the

aluminum

arm.

This

means

that

the

arm

coupled

indirectly

the

plastic

arm.

Resultant

action

causes

the

end

the

plastic

arm

swing

toward

the

center

the

turntable.

soon

the

tonearm

enters

the

return

groove

the

record,

the

bottom

the

turntable

imparts

kick

the

plastic

arm.

Motion

the

plastic

arm

this

time

acts

plastic

arm

(1),

thereby

releasing

plate

(1).

Plastic

arm

(3)

then

locks

plastic

arm

(1).

This

action

closes

the

shorting

switch

that

noise

will

not

generated

the

tonearm

separates

from

the

record.

Plate

(1)

returns

through

action

spring

(2).

Plate

(2)

also

returns.

TURNTABLE

Playing

operation.

Return

operation.

PLASTIC

—

ALUMINUM

Plastic

arm

does

not

Plastic

arm

kicked

ARM

move

during

normal

when

tonearm

enters

play.

return

groove.

PLASTIC

ARM

PLASTIC

ARM

PL-55X

_Return

plate

(1)

results

the

following

sequence.

Pressure

applied

plastic

arm

(1)

and

the

FUNCTION

lever

forced

back

the

OFF

position.

Action

link

(2)

returns

the

aluminum

arm

the

start

position.

Return

plate

(2)

results

the

following

sequence.

Action

the

cam

portion

plate

(2)

lifts

the

tonearm

from

the

record.

Plate

(3)

indirectly

coupled

plate

(2)

swings

the

tonearm

back

the

arm

rest.

Pressure

applied

the

microswitch

actuator,

opening

the

microswitch

contacts

and

stopping

the

phono

motor.

Pressure

applied.

PICK-UP

LEVER

Pick-up

lever

and

tonearm

directly

Fig.

connected

shaft.

Cam

action

lifts

tomearm

PLASTIC

while

motion

PL_ATE(3)

ARM

(1)

PLATE(3)

swings

tonearm

tack

the

arm

rest.

SHORTING

SWITCH

Pawl

disengaged

when

PLATE

(2)

plastic

arm

kicks

plastic

arm(1).

MICROSWITCH

Microswitch

ACTUATOR

Fig.

3.4

STOPPING

UNDER

MANUAL

Moving

the

FUNCTION

lever

the

ON/UP

position

causes

pawl

(1)

plate

(1)

engage

plastic

arm

(1).

Phono

motor

operation

begins.

Moving

the

FUNCTION

lever

the

OFF

position

causes

plastic

link

(4)

shift,

turn

desengaging

pawl

(2)

from

plastic

arm

(1).

Action

spring

(2)

returns

plate

(1).

result,

the

phono

motor

stops,

described

under

(6)

and

(7)

page

Moving

the

FUNCTION

lever

the

DOWN

position

initiates

playback

the

record.

When

this

lever

moved

from

the

DOWN

the

OFF

position,

pawl

(2)

disengaged

from

plastic

arm

(1)

through

action

plastic

link

(4).

The

phono

motor

stops,

described

under

(4)

through

(7)

page

PLASTIC

ARM(1)

DNs

PLASTIC

LINK(4)

PaWilal

ARM)

SHORTING

PNG

awit)

PLATE(1)

PLASTIC

LINK(4)

Fig.

ADJUSTMENTS

4.1

TONEARM

WILL

NOT

RETURN

THE

ARM

REST

the

back

the

turntable

not

(or

incorrectly)

engaged

with

the

plastic

arm

the

tonearm

will

not

return

the

arm

rest.

The

probable

causes

the

trouble

are

follows;

(a)

The

tip

the

plastic

arm

bends

downward.

(b)

The

bent.

(c)

The

pick-up

lever

incorrectly

mounted.

case

(a)

(b)

responsible

for

the

trouble,

correct

the

curve

the

plastic

arm

the

bend

the

pin.

necessary;

replace

the

plastic

arm

the

case

may

be.

case

(c)

the

cause

the

trouble,

adjust

the

screw

provided

the

tip

the

pick-up

lever

that

the

pick-up

lever

will

push

the

aluminum

arm

when

the

head

the

tonearm

reaches

the

point

130¢

from

the

center

the

turntable

(Fig.

8).

4.2

TONEARM

RETURNS

THE

ARM

REST

BEFORE

THE

RECORD

FINISHES

The

pick-up

lever

incorrectly

mounted.

The

best

solution

this

trouble

replace

the

plastic

arm.

This

trouble

also

occurs

when

the

plastic

arm

fails

move

smoothly.

Oil

the

automatic

return

mechanism.

4.3

TONEARM

RETURN

SPEED

INCORRECT

the

return

speed

too

slow,

first

insure

that

the

cause

not

due

dirt.

Adjust

spring

(2)

tension

give

the

correct

spring,

increasing

tension

increase

speed

and

reducing

tension

decrease

speed

(Fig.

9).

turn

the

nuts.

SPRING(2}

Fig.

PL-55xX

4.4

TONEARM

STOPS

BEFORE

REACHES

THE

ARM

REST

This

trouble

occurs

when

the

plate

(1)

and

the

plate

(2)

fail

move

smoothly.

Oil

the

plate

(1)

and

plate

(2)

first

and

see

they

move

smoothly.

not,

replace

them.

4.5

TONEARM

HITS

THE

INSIDE

THE

ARM

REST

See

the

head

the

tonearm

rises

10mm

off

the

turntable

with

the

FUNCTION

lever

set

OFF.

the

tonearm

rises

incorrectly,

adjust

the

height

the

arm

rest

means

the

screw

provided

the

arm

rest

base;

not,

adjust

the

height

the

elevator

rubber

means

the

adjust

screw

the

elevator

arm

shaft

(Figs.

10,

11).

AND

DOWN

SCREW

ARM

REST

BASE

Fig.

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