Dual 1229 Q Manuel utilisateur

Table des matières

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Technics

Technics SL-1200 Manuel utilisateur

Dual

Edition

June

1974

Technical

specifications

Power

source

Line

voltages

Drive

Power

consumption

Current

consumption

Dual

1229

Service

Manual

50

or

60

Hz

alternating

current,

selected

by

exchanging

motor

pulley

and

resetting

strobos-

cope

110—

130

volts

or

220

—

240

volts,

svvitchable

Dual

synchronous/continuous-pole

motor,

with

radial

elastic

suspension

approx.

10W

at

220

volts,

50

Hz

approx.

62

mA

at

117

volts,

60

Hz

approx.

115

mA

Turntable

platter

nonmagnetic,

dynamically

balanced,

weight

3.1

kg,

diam.

305

mm

Turntable

speeds

33

1/3,45

and

78

rpm

Pitch

control

Range

of

variation,

one

semitone

(6%),

on

all

three

speeds

Stroboscope

For

33

1/3

and

45

rpm

speeds.

I

Iluminated

by

special

neon

glow

lamp

Speed

variation

<

±

0.06%

according

to

DIN

45

507

Noise

Rumble

42

dB

below

standard

signal

Measured

according

to

DIN

45

500

Weighted

audible

rumble

63

dB

below

standard

signal

Tonearm

Torsionally

rigid,

extra-long

tubular

tonearm

in

four-point

gimbal

type

bearing

Maximum

tracking

error

0.16°/cm

Tonearm

bearing

friction

vertical

<

0.007

gram

(referred

to

stylus

tip)

horizontal

<

0.015

gram

Tonearm

head

Removable,

accepts

all

cartridges

weighing

2

to

10

grams

and

having

standard

1/2"

moun-

(cartridge

holder)

ting

centers

Weight

7.2

kg

unpacked

Mounting

dimensions

and

mounting

board

cut-out

see

installation

instructions

Dual

Gebrüder

SteldInger

•

7742

St.

GeorgenISchwarzwald

Download from www.dual.de

Not for commerical use

Fig.

1

Tonearm

connections

right

channel

t

---c

ime

red

a

I-----

/

1

>

/ I

\

e

0

1

n

L

__

Muting

switch

Mass

sheet

0

r

r

-r

—

1

1

I

I I

right

channel

_

L»

!

red

Mass

right

channel

green

E

Contact

plateat

tonearm

head

Record

Cartridge-holder

red

I

green

Cartridge

eedie‘meee

4 4 1

left

channel

-1

> r

---

--

1

'

1

_....

I

1

white

I<

L

---

p

-----

i

I

>L

.1

—

--

—

—

1

I

.

LI

i

I,

Tonearm

audio

cable

c

-

black

left

channel

white

Mass

left

channel

blue

Q2

—

white

blue

al

with

miniature

plug

5-pin

right

channel

red

lead

left

channel

white

lead

black

(red)

inner

side

of

groove

z

outer

side

of

groove

left

channel

right

channel

b)

with

phono

plug

i i

I

I

white

(yellow)

'Nee

Tonearm

head

%NW

Spring

contacts

between

plug-in

cartridge

head

and

tonearm

2

Contents

ee.

Page

Technical

specifications

1

Head

connecting

diagram

2

Motor

and

drive

4

Stroboscope

5

Stroboscope

bulb

not

illuminated

5

Fine—speed

adjustment

6

Turntable

does

not

run

when

start

switch

is

operated

6

Turntable

does

not

come

up

to

speed

6

Rumble

affecting

reproduction

6

Correct

nominal

speed

obtained

only

at

extreme

settings

of

pitch

control

6

The

tonearm

and

its

suspension

7

Anti—skating

adjustment

8

During

change

cycle,

tonearm

is

restricted

horizontally

9

Stylus

skips

9

Vertical

movement

of

tonearm

is

impeded

during

set—down

cycle

9

Tonearm

movements

10

Tonearm

lift

10

Tonearm

misses

edge

of

record

11

Tonearm

strikes

record

during

change

cycle

11

Tonearm

does

not

move

on

to

record

when

drop

cycle

is

started

11

Tonearm

is

lowered

too

quickly

when

drop

cycle

is

started

11

Sleeve

movement

not

damped

when

tonearm

lift

handle

is

moved

back

11

Tonearm

returns

to

rest

immediately

after

being

placed

on

record

manually

11

Start

cycle

11

Manual

start

12

Stop

switching

12

Muting

switch

12

Record

drop

13

Shut—off

and

change

cycle

13

Shut—off

mechanism

13

Turntable

stops

after

automatic

set—down

of

tonearm

14

Tonearm

misses

12"

record

during

cycling

when

moving

in

or

out

14

Last

record

keeps

repeating

15

Records

do

not

drop

15

Switch

locks

into

"stop"

position

when

tonearm

is

at

rest

15

Tonearm

will

not

lift

away

from

tonearm

rast

with

mode

selector

in

"multi"

position

15

Tonearm

moves

although

stylus

force

and

anti—skating

force

are

of

zero

16

During

change

movements

noises

from

the

mechanism

can

be

heard

in

16

the

speaker

system

16

Na

replay

sound

16

Motor

does

not

shut

off

when

tonearm

is

on

rest

16

Acoustic

feedback

16

With

mode

selector

at

"single",

tonearm

does

not

move

in

toward

record

on

automatic

single—play

operation

16

Record

does

not

drop

with

changer

spindle

in

position

16

Spare

parts

16

—

17

Exploded

view,

above

chassis

18

Exploded

view,

below

chassis

19

Spare

parts

20

—

22

Lubrication

23

3

Fig.

2

Motor

suspension

and

turntable

platter

drive

96

104

Motor

and

Pulley

134

131

133

156

Power

for

the

turntable

platter

and

the

changing

mechanism

is

supplied

by

a

four—pole

Dual

continuous

pole

synchronous

motor

su—

spended

by

radially

located

elastic

mounts

and

having

a

very

small

stray

magnetic

field

and

little

vibration.

The

speed

of

the

motor

is

independent

of

line

voltage,

temperature

or

load

variations.

Speed

is

dependent

on,

and

proportional

to

power—line

frequency.

The

motor

is

adapted

to

50

or

60

cycle

(Hz)

power—line

frequencies

by

the

correct

choice

of

motor

pulley.

Motor

pulley

for

50

Hz

operation:

Motor

pulley

for

60

Hz

operation:

Part.—No.

218

275

Part.—No.

216

276

Fig.

3

Motor

field

connections

115

121

188

The

motor

pulley

(115)

is

fastened

to

the

motor

shaft

by

a

setscrew.

When

you

change

pulleys,

be

sure

that

the

new

pulley

is

set

at

the

correct

height

(see

page

6).

The

turntable

platter

is

driven

by

the

id—

ler

wheel

(131),

which,

to

prevent

damage

to

its

friction

surfaces,

is

automatically

disengaged

when

the

unit

is

shut

off.

Set—

ting

the

turntable

speed

to

33

1/3,

45

or

78

rpm

is

done

by

raising

or

lowering

the

idler

to

bear

against

the

proper

step

of

the

motor

pulley.

Upon

actuation

of

the

switch

(6),

the

switch

segment

(102)

rotates.

This

causes

the

lever

(134)

fitted

into

a

slot

on

the

segment

to

move

vertically.

The

drive

wheel

(131)

carried

on

the

swinging

arm

(133)

is

then

lifted

off

the

motor

pulley,

moved

and

replaced

on

the

motor

pulley

step

cor—

responding

to

the

selected

speed.

220-240V

4

110-125V

St

roboscope

The

exact

adjustment

for

33

1/3

and

45

r.p.m.

can

be

controlled

with

the

help

of

the

stroboscope,

including

when

a

disc

is

being

played.

The

ring

of

lines

on

the

strobe

will

appear

to

stand

still

when

the

turntable

(4)

rotates

at

the

correct

speed

(33

1/3

or

45

r.p.m.).

If

the

ring

of

lines

turns

in

the

same

direc—

tion

as

the

turntable

platter,

the

speed

of

the

platter

is

too

fast;

when

the

lines

move

in

the

opposite

direction

to

the

platter,

then

the

platter

is

rotating

slower

than

the

chosen

speed.

The

adjustment

is

made

with

the

"pitch"

knob

(8).

The

view

angle

of

the

stroboscope

can

be

rotated

by

turning

the

knurled

ring.

To

change

the

angle,

lasen

the

machine

screws,

slide

the

stroboscope

housing

(85)

11

50"

or

"60"

and

tighten

the

screws

again.

The

neon

lamp

(93)

can

be

changed

after

re—

moving

the

top

part

of

the

housing

(90).

When

replacing

the

neon

lamp,

be

sure

that

the

red

point

(p)

(Anode)

is

located

on

the

right

contact

spring

(unit

viewed

from

front).

Trouble

The

stroboscope

neon

lamp

(93)

does

not

light

up

when

the

unit

is

turned

on.

Cause

a)

Defective

neon

lamp

(93)

b)

Current

path

is

interrupted

Remedy

a)

Replace

the

neon

lamp

(93).

Make

sure

that

the

red

point

(Anode)

of

the

neon

lamp

is

located

on

the

right

contact

spring

(front

view

of

unit).

Fig.

4

b)

Check

the

connections

on

the

power

supply

switch

and

other

components.

Fig.

4

Stroboscope

Fig.

5

Wiring

diagram

,

1

,

Netzschalter

POWER

SWITCH

INTERRUPTEUR

SECTEUR

Fig.

6

Circuit

board(output

stages)

Fig.

7

Pitch

Control

Trouble

Turntable

does

not

run

when

unit

is

'plugged

in

and

start

switch

operated

Turntable

does

not

come

up

to

speed

Rumble

affecting

re—

production

Fig.

8

Cause

a)

Current

path

to

motor

interrupted

b)

Idler

wheel

(131)

not

in

contact

with

platter

c)

Motor

pulley

loose

a)

Motor

pulley

is

not

correct

for

local

line

fre—

quency

b)

Slip

between

id-

1er

wheel

(131)

and

motor

pulley

or

platter

c)

Excessive

fric—

tion

in

motor,

drive

wheel

or

platter

bearings

Worn

idler

wheel

A

fine—speed adjustment

for

all

three

speeds

(33

1

/

3

,

45

and

78

r.p.m.)

permits

a

platter

speed

variation

of

max.

6

%

(1

semitone),

independent

of

supply

voltage.

Turning

the

pitch—control

disc

(8)

causes

the

selector

segment

(102)

to

rotate.

The

switch

lever

assembly

(134)

moves

up

and

down,

changing

the

position

of

the

idler

wheel

on

whatever

motor

pulley

step

it

has

been

placed

on.

The

tapered

shape

of

the

motor

pulley

gives

and

adjustment

range

of

+

3

%

from

the

nominal

speed.

The

motor

pulley

(115)

should

be

adjusted

in

such

a

way

that

on

33

1/3

r.p.m.

(checked

with

the

stroboscope),

the

markings

on

the

adjusting

disc

(8)

should

be

between

the

two

middle

lines.

Due

to

production

toleran—

ces,

the

45

r.p.m.

rated

speed

may

differ

from

the

33

1/3

r.p.m.

by

up

to

two

scale

markings

on

either

side.

Rermedy

a)

Check

connections

at

switch

plate

and

voltage

selector

b)

Check

switch

lever

assembly

(134)

c)

Tighten

motor

pulley

a)

Change

motor

pulley

b)

Clean

friction

surfaces

of

idler

wheel,

motor

pulley

and

turntable

platter.

If

necessary,

replace

drive

wheel.

Once

the

drive

surface

of

the

platter

has

been

cleaned,

da

not

touch

lt

with

your

fingers.

c)

Clean

and

oil

bearings

Replace

idler

wheel

(131).

Clean

platter

drive

surface

and

motor

pulley

with

grease

solvent.

Once

surfaces

arm

cleaned,

do

not

touch

them

with

your

fingers.

Trouble

Correct

nominal

speed

obtained

only

at

ex—

treme

settings

of

pitch

control

Cause

a)

Idler

wheel

does

not

contact

motor

pulley

accurately

b)

Motor

pulley

out

of

adjustment

Remedy

a)

With

adjuster

(E)

turn

alignment

screw

(95)

(Fig.

7)

until

rated

speed

is

ob—

tained

at

contral

setting

of

pitch

con—

trol

(8)

b)

Move

pitch

control

(8)

and

alignment

disc

(101)

to

center

settings

(1

mm

dia.

hole

on

disc

opposite

alignment

wheel).

Ad

—

just

the

motor

pulley

vertically

after

loosening

its

setscrew

(116)

by

turning

screw

(114).

The

correct

position

for

the

idler

is

in

the

center

of

each

motor

pulley

step,

when

the

pitch

control

is

centered

in

its

range

(Fig.

8).

Retighten

setscrew

(116)

after

adjustment.

6

Tonearm

and

Tonearm

Bearing

Fig.

9

Tonearm

bearing

assembly

•

Tubular

tonearm,

extra

lightweight,

torsionally

rigid

tonearm

of

the

Dual

1229

Q

pivots

both

horizontally

and

vertically

on

needle

bea—

rings

and

precision

ball

bearings

in

harde—

ned

and

polished

races.

lt

is

suspended

in

a

gimbal

arrangement.

This

keeps

friction

to

a

minimum.

Vertical

pivot

friction

=

0.007

gram

Horizontal

pivot

friction

=

0.015

gram

referred

to

stylus

tip

The

arm

is

thus

able

to

track

extremely

well.

The

tonearm

head

is

removable.

Before

set—

ting

the

tracking

force

for

the

cartridge

being

used,

set

the

tracking—force

scale

to

zero

and

balance

the

tonearm.

Initial

ba—

lance

is

by

sliding

the

counterweight

(74).

Final

adjustment

is

by

turning

the

weight.

You

can

balance

cartridges

with

a

weight

of

1

to

10

grams.

To

reduce

the

effects

of

small

shock

im—

pulses

on

the

arm,

the

counterbalance

weight

is

resiliently

mounted

on

a

threaded

spindle,

and

friction—braked

to

prevent

accidental

rotation.

The

cartridge

holder

will

accept

all

cartridges

with

international

standard

mounting

centers

of

1/2

inch.

Stylus

force

is

set

by

turning

a

calibrated

housing

(78),

which

stresses

or

releases

a

spiral

spring

contained

inside.

The

scale

adjustment

is

calibrated

from

0

—

3

p,

from

0

—

1.5

p

at

1/10

p

and

from

1.5

—

3

p

at

1/4

p

intervals.

Tracking

forces

of

mors

than

3

p

can

be

ad—

justed

with

the

help

of

the

counter—weight

on

the

tonearm;

turning

left

(counter—clock—

wise)

increases

the

tracking

force

by

1/2

p

per

complete

turn.

To

replace

the

tonearm

and

bearing

assembly,

follow

these

steps:

1.

Set

stylus

force

dial

to

zero

and

mo—

de

selector

to

"single".

2.

Fasten

unit

in

repair

jig

and

turn

upside

down.

3.

Unsolder

tonearm

bade.

4.

Remove

main

lever

(184)

and

linking

layer

(270).

5.

Unhook

springe

(237,

241,

269

and

unscrew

protective

plate

(233

.

6.

Remove

washer

(266)

and

skating

lever

(267).

7.

After

removing

lock

wacher

(272)

and

sliding

disc

(271),

remove

shut—off

slide

(253)

from

segment

(201).

8.

Loosen

hex

nut

(236).

Pull

off

guide

(198)

and

lock

wacher

(199).

After

unscrewing

positioning

sleeve

(200),

lift

plata

with

lifting

pin

(203)

and

segment

(201)

can

be

removed.

9.

Turn

the

unit

back

in

its

normal

po—

sition.

10.

Set

mode

selector

on

"multi",

then

rotate

the

tonearm

bearing

frame

(58)

counter—clockwise

until

it

cannot

turn

anymore.

The

tonearm

can

then

be

lif—

ted

out.

61

62

58

60

59

Fig.

10

Tonearm

assembly

sequence

78

83

76

57

68

10

201

203

206

7

Fig.

11

Tonearm

bearing

assembly

viewed

from

underneath

273

270

184

210

Fiq.

12

Anti—skating

force

Cam

wheel

a)

Anti-skating

in

"0"

Skating

lever

Shut-off

slide

Radius

for

conical

styli

b)

Anti-skating

mechanism

in

"1,5"

on

the

scale

for

conical

styli.

Tonearm

on

rest

position.

Radius

for

elliptical

styli

c)

See

"b",

tonearm

only

over

turn-table.

Anti-skating

force

Skating

force

Tension

spring

Segment

58

74

77

233

258

241

201

267

Shield

Tension

spring

Anti-skating

mechanism

To

replace

the

tonearm

bearing

assembly,

hold

it

with

a

suitable

tool

(such

am

a

pair

of

flat—nose

pliers)

and

loosen

hex

nut

(71)

with

an

open—end

wrench.

Be

sure

to

secure

the

bearing

socket

with

a

5

mm

rod

to

prevent

its

being

pinched

together.

Reverse

the

procedure

to

reassemble

the

to—

nearm

and

bearing.

The

unit

must

be

right—

side—up.

After

assembly,

immediately

place

the

mode

selector

at

"single".

This

prevents

the

tonearm

from

falling

out

when

the

unit

is

turned

upside

down

again.

Do

not

omit

spring

(78).

Install

segment

(201)

and

lift

plate

(203).

Tighten

the

positioning

sleeve

(200)

on

the

lift

tube.

Insert

lock

washer

in

recess

on

lifting

pin

and

mount

the

guide

again.

Be—

fore

tightening

hex

nut

(236),

rotate

outer

bearing

frame

(58)

counter—clockwise

until

you

feel

slight

resistance.

This

puts

the

forward

edge

of

the

outer

bearing

frame

approximately

at

the

center

line

of

the

in—

ner

tonearm

bearing

screw,

and

represents

the

correct

tonearm

position.

After

reinstalling

the

protective

plate,

ensure

that

the

segment

(201)

moves

freely

and

without

rubbing

in

its

guide

(232)

and

is

not

hindered

in

its

movement

by

the

to—

the

tonearm

wires.

Adjust

tonearm

height

with

positioning

sleeve

(200)

and

locating

screw

(79)

in

"multi"

position

at

the

mode

selector.

Correct

position

with

main

lever

pressed

up

is

approx.

0.5

mm

play

remaining

measured

at

tonearm

head,

see

Fig.

13.

Anti-Skating

Device

The

tendency

of

a

tonearm

with

an

offset

(angled)

head

to

"skate"

inward

across

the

record

is

eliminated

in

the

Dual

1229

Q

by

a

precision

anti—skating

mechanism.

Skating

force

depends

on

tonearm

geometry,

stylus

force

and

the

tip

radius

of

the

stylus.

The

inward

pull

on

the

tonearm

caused

by

the

ska—

ting

effect

gives

rise

not

only

to

an

un—

desirable

jumping

of

the

tonearm

when

set

down

on

the

record,

but

also

to

unequal

forces

on

the

two

opposite

groove

walls,

with

cor—

responding

iii

effects.

This

can

be

correc—

ted

by

proper

anti—skating

adjustment

am

pro—

vided

on

a

high

—grade

HiFi

record

player.

By

turning

the

anti—skating

adjustment

knob

(84)

on

the

chaasis,

an

asymmetrical

curved

surfaces corresponding

to

the

red

and

whi—

te

scales

on

the

antiskating

dial.

The

red

sdale

is

for

conical

(spherical

tip

styli,

the

white

for

elliptical

(bi

—radial)

styli

and

for

CD

-4

quadrophonic

cartridges.

When

the

knob

is

turned,

the

curved

surfaces

push

the

anti—skating

lever

(267)

away

from

its

rest

position

so

that

it

applies

a

suitable

counter—force

via

a

spring

(265).Skating

compensation

is

set

at

the

factory

for

conical

styli

with

a

tip

radius

of

15

+

2

µm,

and

for

elliptical

styli

with

mea:

surements

of

5/6

x

18/22

µm.

The

adjust—

ing

hex

nut

(259)

is

tightened

and

sealed.

Readjustments

should

be

attempted

only

with

the

help

of

the

Dual

Skate

-0

—Meter

and

test

record

L

096.

This

work

should

be

done

by

an

authorized

Dual

service

agency.

8

Trouble

During

change

cycle,

tonearm

is

restricted

horizontally.

Cause

Positioning

sleeve

or

locating

screw

out

of

adjustment.

Remedy

With

main

lever

(184)

pressed

up,

adjust

positioning

sleeve

so

that,

with

the

tone

—

arm

unlocked

and

over

the

rest,

the

upper

edge

of

the

tonearm

rast

piece

and

the

above

edge

of

the

tonearm

rest

are

at

the

same

height.

Now

adjust

to

a

play

of

0.1

—

0.2

mm

between

guide

and

tonearm

rest

sur—

face

by

means

of

the

locating

screw

(79).

(Approx.

0.5

mm

measured

at

tonearm

head).

Fig.

13

Trouble

Cause

Remedy

Stylus

skips

a)

Tonearm

not

balanced

a)

Balance

tonearm

b)

Stylus

force

too

low

b)

Set

stylus

force

to

cartridge

manufac—

turer's

recommended

value

c)

Anti—skating

wrongly

c)

Correct

anti—skating

setting

adjusted

d)

Stylus

worn

or

chip—

d)

Renew

stylus

ped

e)

Excessive

friction

in

e)

Check

tonearm

pivot.

Both

bearings

should

tonearm

bearing

haue

barely

noticeable

play.

Adjust

ver—

tical

baering

only

with

the

left

bearing

screw

(62)

and

horizontal

bearing

with

nut

(59).

Horizontal

bearing

is

correct—

ly

adjusted

when

the

tonearm,

with

anti—

skating

set

at

0.5

gram,

swings

freely

from

center

to

rest

(first

balance

tone

—

arm

accurately).

f)

Steel

ball

(254)

miss—

Replace

steel

ball

(254)

ing

from

shut—off

rail

g)

Segment

(201)

rubs

in

g)

Adjust

guide

(232).

Adjustment

is

correct

guide

when

the

tonearm

moves

freely

in

the

horizontal

plane

at

both

settings

of

the

mode

selector

Vertical

movement

a)

Bearing

friction

toc

high

of

tonearm

is

im—

peded

during

set—

b)

Lift

screw

(206)

jams

down

cycle

in

guide

tube

of

lift

plate

a)

Adjust

at

bearing

screw

(62),

and

check

arm

balance

b)

Remove

and

clean

lift

screw.

Clean

lift

tube

and

fill

with

"Wacker

Silicon

Oil

AK

500

000".

Fig.

14

Tonearm

control

mechanism

Tonearm

Movement

151

173

Fig.

15

215

184

203

Adjustment

of

tonearm

height

(with

tonearm

raised

)

Cadridge

mount

[

1

1

Cartridge

235

mm

15

/

6

4"

Record

Turntable

platter

mat

Turntable

platter

Fig.

16

Tonearm

lift

with

tonearm

raised

max.

8

mm

5

/

1

,

"

-262

—270

195

255

—257

234

A

guide

groove

located

on

the

underside

of

the

main

cam

(165)

controls

automatic

lift

and

set—down

of

the

tonearm

as

the

cam

rotates

through

360

0

.

Tonearm

lift

and

lowering

are

controlled

by

the

main

lever

(184)

and

the

lift

screw

(206).

Horizontal

movements

are

controlled

by

main

lauer

(184)

and

the

segment

(201).

Setting

the

changer

for

playback

of

7",

10"

or

12"

discs

is

done

with

the

indexing

lever

(49).

Set

—down

points

are

determined

by

the

eccentric

ortion

of

the

arm

positioning

slide

(225)

and

the

in—

dexing

lever

(267).

Horizontal

movement

of

the

tonearm

is

limited

by

the

arm

segment

striking

the

arm

positioning

slide

(255).

During

the

change

cycle,

the

main

lever

(184)

raises

the

arm

positioning

slide,

bringing

it

within

reach

of

the

spring

stud.

On

completion

of

the

change

cycle

(set—down

of

the

tonearm

on

the

record),

the

arm

po—

sitioning

slide

(255)

is

again

released

and

returns

to

its

normal

position.

lt

thus

moves

out

of

reach

of

the

spring

stud,

permitting

the

tonearm

to

move

hori—

zontally

without

hindrance

while

playing

the

record.

Tonearm

Lift

The

tonearm

lift

permits

the

tonearm

to

be

set

down

on

the

record

safely

at

any

desired

point

except

the

shut—off

area

(near

the

re—

cord

label).

Pulling

the

tonearm

lift

control

towards

the

front

turns

the

drive

cam

(220).

This

moves

the

connecting

lever

(270),

and

lift

screw

(206),

to

raise

the

tonearm.

After

the

tonearm

has

been

moved

(by

hand)

to

the

desired

spot

on

the

record,

the

tone

—

arm

lift

handle

is

lightly

tapped

towards

the

rear

to

release

the

mechanism.

The

con—

necting

lever

(270)

and

spring

(205)

of

the

lift

screw

(206)

are

freed,

allowing

the

tonearm

to

fall.

The

rate

of

fall

is

con—

trolled

by

silicone

oil

in

the

lift

tube.

The

height

of

the

stylus

above

the

record

can

be

varied

by

adjusting

setscrew

(218).

Turning

it

to

the

right

increases

the

height,

turning

it

to

the

left

decreases

the

height.

Units

leaving

the

factory

are

adjusted

so

that

the

tonearm

still

lifts

reliably

off

the

fifth

record

on

the

platter.

64

220

216

270

10

234

28

201

229

206

184