JVC QL-A2 Bedienungsanleitung

JVC

MODEL

OL:-A2

QUARTZ

AUTO-RETURN

TURNTABLE

No.2444

JAN.

1978

QL-A2

No.

2444

Contents

Page

1.

Specifications

0...

ec

ee

eee

ee

eee eee

en

eee

ees

2

2:

Service:

Precautions:

sos.

oe

Sieis5

Fae

ae

eek

BE

ee

ace

Reber

e

ee

se

Sw

Senge

lig)

a

Tee

ial

tile

3

SER

OAtures

coe

555.

cos

et

Pats

ce

Seedech

ee

eels

eta

iat

hts

Gorn

oactarses

ante

vale:

Wife

ee

Saree

Hayenas

raises

ah

oe

sagen

3

4.

‘How

to

Operate’

(Names

and

Functions)

.........

000.

eee

e

tenes

3

5.

Operation

of

Automatic

Mechanism

...

2...

0 6

ce

eee

teenie

ee

4

6.

Block

Diagrams

6-(1)

Servomotor

Control

System

.......0

2

2c

ee

eee

ees

5

6-(2)

{C802

Integrated

Circuits

and

Waveforms

.........2

0002

cect

ene

ener

eee

5

7.

Troubleshooting

7-(1)

Platter

does

not

rotate...

0...

eee

ener

eee

6

7-(2)

Platter

rotates

at

high

speed

..

1.2.2...

ee

cc

ee

et

eens

7

7-(3)

Rotation

is

not

locked

to

the

crystal

oscillator

frequency

.........2

0+.

ee

ene

7

8.

Cartridge

Replacement

..........

0.

cece

eee

ee

eee

tees

8

9.

Adjustment

Procedures

Servomotor

Control

Section

9-(1)

Power

Supply

Voltage

Check

.........

:0

cece

eee

e

eee

8

9:(2)'

Lock:

Akiuistenie

nt

35.26:

a5

55

Seite

S55

ete

cw

ey

oriasies

ead

Sey

leer

e

sora SOUR

ale

eae

Sa

8

Tonearm

Section

9-(3)

Overhang

Adjustment

......

0...

0c

ec

ee

et

ee

tee

eee

9

9-(4)

Tonearm

Lifter

Height

Adjustment

..---

02-00

cece

ee

ens

9

9-(5)

Auto-return

(Lead-out)

Adjustment...

2.0.60.

eee

teens

9

9-(6)

Tracking

Force

Adjustment

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

00.

cece

eee

10

9-(7)

Anti-skating

Adjustment

....

0.2...

00.

eee

eet

eee

10

10:

Lubrication

=...

iene

ee

tiie

ees

te

eee

ao

Wie

Wh,

BAS

a

Rae

Bee

ee

Se

11

11.

Exploded

Views

and

Parts

List

11-(1)

Cabinet

and

Mechanism

Assembly

..........00

0

eee

eee eee

ee

eee

11

11-(2)

Mechanism

Base

Assembly

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

0.

eee

ee

eee

te

eens

13

11-(3)

Knob

Base

Assembly...

2...

0...

ccc

ee

eee

een

ee

eens

13

11-(4)

Tonearm

Assembly

.......0.

0.00

cece

eee

ee

eee eee

eee

14

11-(5)

Parts

List

with

Specified

Numbers

for

Designated

Areas........-.----0220200-

14

12.

Connection

Diagram

of

TXX-124

2.2...

ce

ee

eee

ene

15

13.

TXX-124

Schematic

Diagram

..

0...

06.

ce

eee

ee

eee

16

14.

TXX-124

Printed

Circuit

Board

Ass’y

and

Parts

List...

2.2...

ce

ee

17

15.

Packing

Materials

and

Part

Numbers

...

0...

0.

eee

ec

ee

eee

ee

eee

ee

21

AG.

Accessories

EASE,

<2.

sic

o.scechcecce

eb

sok,

laa

8

aie

ee

es

ese

othe

Soe

pera

ee

ace

&

a

ad

21

17.

QL-A2:

Schematic:

Diagraint

22.55:

euc

ols

aleca

en

tes

a

hee

R)

aca

wee)

le

8

Dew

eee

Bla

eae

Ss

be

22

CHECKING

YOUR

LINE

VOLTAGE

(For

U.S.

Military

Market

and

Other

Countries)

Before

inserting

the

power

plug,

please

check

this

setting

to

see

that

it

corresponds

with

the

line

voltage

in

your

area.

If

it

doesn’t,

be

sure

to

adjust

the

voltage

selector

switch

to

the

proper

setting

before

operating

this

equipment.

The

voltage

selector

switch

is

located

either

on

the

set’s

on

the

chassis.

Simply

insert

a

screw

driver

into

the

voltage

selector

switch

and

turn

it

in

either

direction

while

pressing

slightly

and

in

such

a

way

that

desired

voltage

marked

on

the

switch

is

positioned

underneath

the

arrow

.

marked

on

the

rear

panel

or

the

chassis.

The

voltage

selector

switch

accommodates

up

to

three

turns

in

either

direction.

1.

Specifications

Motor

section

Motor

Drive

system

Speeds

Wow

and

flutter

Rumble

Speed

detection

Starting

torque

Speed

deviation

Load

characteristics

Drift

per

hour

Power

characteristics

Temperature

characteristics

Platter

Tonearm

section

Type

Effective

length

Tracking

error

Overhang

Tracking

force

range

Weight

range

(including

headsheil)

:

Coreless,

DC

type

FG

servomotor

:

Direct

drive

:

33-1/3

and

45

rpm

:

Less

than

0.025

%

(WRMS)

:

More

than

62

dB

(IEC-B)

More

than

72

dB

(DIN-B)

:

Integrated

frequency

generator

:

More

than

650

g-cm

:

Within

0.004

%

:

0

%

(with

100

g

total

tracking

force)

:

0.0001

%/H

:0%

(410

%

V)

:

0.00005

%/°C

:

31.2

cm

diameter

:

T.H.

(Tracing-Hold

system,

static

balance}

:

220

mm

:

+3°35'

-0°43'

:

15mm

:

0

—3g

(0.25

grams

division,

direct

reading)

:

14.5

—

21

g

(Headshell

10

g)

Cartridge

section

(not

provided

on

units

for

U.S.A.,

Canada

and

the

U.K.)

Type

Stylus

Optimum

tracking

force

Output

Frequency

response

Separation

Load

resistance

Compliance

General

Dimensions

Weight

Power

Specifications

U.S.A.

&

CANADA

CONTINENTAL

EUROPE

U.K.

&

AUSTRALIA

U.S.

MILITARY

MARKET

OTHER

AREAS

:

Moving

Magnet

(Cartridge

body:

MD-1025)

:

0.5

mil.

diamond

(DT-Z1S)

:

2

grams

:

3

mV

(1

kHz)

:

10

to

25

000

Hz

:

More

than

25

dB

(1

kHz)

(with

test

record

TRS-1)

:

47

kilohms

—

100

kilohms

:

10

x

10%

cm/dyne

(Dynamic)

30

x

10°

cm/dyne

(Static)

:

14.7(H)

x

46.0

(W)

x

36.5(D)

cm

(with

cover

closed)

(5-13/16"

x

18-1/8"

x

14-3/8”)

(Since

the

dimensions

show

only

the

design

measurements,

consideration

is

required

when

installing

the

unit

in

a

limited

space

such

as

a

rack.)

:

6.5

kg

(14.3

Ibs)

(without

corrugated

cardboard

case)

AC

120

V,

60

Hz

9

watts

AC

220

V~,

50

Hz

AC

240

V~,

50

Hz

AC

110,

120,

220,240

V

Selectable,

50/60

Hz

AC

110,

120,220,240

V

Selectable,

50/60

Hz

9

watts

9

watts

9

watts

9

watts

QL-A2

No.

244

j

i

2

3.

Features

Quartz-locked

speed

contro!

system

DC

type

FG

servomotor

Quartz-locked

one-row

stroboscope

Oil-damped

cueing

Anti-skating

mechanism

2.

Service

Precautions

1.

Be

sure

to

place

the

unit

on

a

level

surface

when

adjust-

ing

motor

rotation.

2.

In

servicing,

do

not

use

parts

other

than

those

specified.

3.

Be

careful

not

to

damage

the

motor

shaft

when

repairing

the

motor

unit.

4.

When

the

heat

sink

(including

X815)

is

removed

from

the

motor

board

to

permit

repair

of

the

circuit

board,

the

transistor

temperature

may

increase

due

to

the

lack

of

heat

radiation.

4.

“How

to

Operate’’

(Names

and

Functions)

EP

adaptor

Place

this

adaptor

onto

the

center

spindle

when

you

play

a

record

with

a

bigger

center

hole

such

as

a

doughnut

record.

Anti-skating

knob

This

device

cancels

out

the

centripetal

force

that

pulls

the

tonearm

to

the

center

of

the

platter.

This

prevents

the

stylus

tip

from

skating

toward

the

center

of

the

platter

and

at

the

same

time

elimi-

nates

any

excessive

stylus

tip

force

on

the

inner

wall

of

the

record

groove.

Use

the

@

marked

dial

when

employing

a

spherical

stylus.

Use

the

a

marked

dial

when

employing

an

ellipti-

cal

stylus

or

a

Shibata

stylus.

Turn

the

dial

to

the

same

number

as

the

tracking

force

dial.

Speed

select

knob

Select

a

proper

position

of

the

speed

select

knob

in

accordance

with

the

rpm

of

the

record.

33-1/3

rpm

record

(LP)

"33°"

45

rpm

record

(EP)

Tonearm

lifter

lever

This

is

used

when

you

want

the

tonearm

gently

lifted

up

or

lowered

down.

When

you

pull

it

to

“UP”

position,

the

tonearm

will

be

lifted

up,

and

when

you

push

it

to

“DOWN”

position,

it

will

be

lowered

down

gently

onto

the

record

surface.

Stroboscope

pattern

Reject

lever

QL-A2

No.

2444

A

single

stroboscope

pattern

is

equipped

on

the

rim

of

the

platter.

When

the

turntable

rotates

at

either

33-1/3

or

45

rpm,

the

striped

pattern

will

appear

stationary

to

indicate

that

the

turntable

speed

is

correct.

When

you

stop

playing

the

record,

push

the

lever

in

the

direction

of

arrow

toward

“REJECT”

and

release

it.

The

lever

returns

to

its

original

position

and

the

tonearm

lifts

itself

up,

returns

automat-

ically

to

its

rest

and

the

platter

stops

rotatings.

5.

Operation

of

Automatic

Mechanism

Change

cycle

mechanism:

projection

1.

During

playing,

the

notch

of

the

main

gear

position

relative

to

the

turntable

spindle

gear

is

as

shown

in

Fig.

2.

As

the

projection

is

away

from

the

engagement,

the

main

gear

does

not

rotate

even

though

the

turntable.

2.

As

playing

proceeds,

the

trip

slide

moves

toward

the

center

of

the

turntable

following

the

movement

of

the

tonearm

as

shown

in

Fig.

3.

Engagement

Platter

spindle

gear

3.

The

engagement

is

very easy

to

move

as

it

simply

rests

Platter

gear

on

the

lower

trip.

On

the

music

section

of

the

record

groove

the

engagement

moves

so

slightly

that

it

is

Fig.

2

returned

by

the

tip

of

the

projection.

Censequently,

the

turntable

spindle

gear

does

not

engage

with

the

main

gear

and

thus

does

not

trigger

the

auto-return

operation.

4.

When

playing

ends

and

the

pick-up

cartridge

enters

the

lead-out

groove

which

is

spaced

out,

the

engagement

advances

more

then

it

is

returned

by

the

projection.

Because

of

this,

the

engagement

is

pressed

by

the

projection

as

shown

in

Fig.

4,

causing

the

main

gear

to

turn

and

engage

with

the

turntable

spindle

gear.

Thus

the

change

cycle

is

started.

5.

During

the

return

operation

the

engagement

and

lower

trip

which

have

moved

are

returned

to

their

original

position

by

the

reject

lever

coming

into

contact

with

the

Fig.

3

Fig.

4

bottom

of

the

lower

trip.

At

this

moment

the

switch

lever

operates

with

the

help

of

the

main

gear

cam,

switching

off

the

power

just

before

the

rotation

should

stop.

This

completes

the

automafic

cycle.

Tonearm

lift

and

return

mechanism:

1.

When

the

main

gear

starts

to

rotate

at

the

end

of

playing,

the

return

lever

rotates

under

the

action

of

the

main

gear

cam

to

press

the

elevator

cam.

The

upward

movement

of

the

elevator

cam

is

directly

converted

into

movement

ofthe

elevator,

lifting

up

the

tonearm.

(Fig.

5)

2.

The

tonearm

is

returned

by

the

arm

lever

the

end

of

which

presses

it

as

the

main

gear

rotates.

(Fig.

6)

Return

lever

Trip

Slide

Elevator

cam

Fig.

5

Arm

Lever

Fig.

6

QL-A2

=4s

No.

244

6.

Block

Diagrams

6-(1)

Servomotor

Control

System

Platter

Light

emitting

diode

4

Waveform

shaper

Frequency

generator

50

Hz

(at

33-1/3

rpm)

LED

67.5

Hz

(at

45

rpm)

indicator

circuit

Power

switch

sn

.

Power

Motor

drive

:

z

circuit

aoe

9.504

MH

supply

B35

ae

hee

circuit

+e

_—

|

ous

Speed

select

signal

AC

Fig.

7

6-(2)

IC802

Integrated

Circuits

and

Waveforms

Yss

Po

P)

P2

P3

Ps

P5

Pé6

P7

20/27

DO

oppo

ee

ar

”

Lt

et

otf

SM64I5A-4

(i

Se

Ue

65

10

STAGE

PROGRAM

COUNTER

—_———

:

*

}

|

ogy]

ea

20V

ST

ots

20mS

Input

Fig.

10

Waveforms

(Pin

1

through

11)

F/V

section

Waveform

at

4.

5v

FYs

FVc

FY

PDs

PDc

Fig.

8

Block

Diagram

i

\

i

Waveform

at

5,

¥

’

TOP

VIEW

-—

—

jes

vool

lo

vss

;

ea

=

!

QIN

PO

!

|

Waveform

at

7.

H

SOUT

mre

|

teal

FG

IN[

|

r

|p2

a

Approx.

2.0

V

at

33-1/3.

—

FVS

2

P3

-

5

7

rve(

g

3

A

P/D

section

=

oO

—

7

1

FV

a

i

P5

Waveform

at

8,

|

;

=)

ho

2

PDS

&

oO

[Jes

:

=a

c=

|

PDB

P?

—4

t=

+

PDC

ST

Waveform

at

11

|

t

=]

Kk

:

|

V2-V6s2

PPh

20/27

Approx.

1.37

V

at

33-1/3.

Be

sure

to

obtain

:

the

waveform

DATECODE

at

13

through

|

Fig.

9

Pins

Location

Ree

Ororhesiele

Deviation

at

lock

adjustment

damaged.

(this

should

be

within

+

7

msec.)

Fig.

11

Waveforms

(F/V

and

P/D)

QL-A2

No.

2444

-5-

7.

Troubleshooting

7-(1)

Platter

does

not

rotate

Platter

does

not

rotate.

ts22;05V

available

at

TP-5

when

the

Power

switch

is

turned

on?

Yes

No

Is

a

voltage

present

at

the

collector

of

transistor

X815?

Yes

No

Is

an

AC

voltage

present

,

Yes

between

lapping

tabs

7

—

8.

No

Fuse

or

transformer

dis-

connected.

AC

cord

solder-

ing

defective.

Transistor

X815

—

X817

or

diode

D809

defective.

Diode

D810

—

D813

open

or

incorrectly

soldered.

Hall

elements

open.

Motor

disconnected

inside,

dis-

connected

resistors.

Does

the

platter

rotate

when

R822

is

short-circuited?

Yes

No

Does

the

platter

rotate

when

pins

1

and

8

of

IC

803

are

short-circuited?

Yes

No

Does

platter

rotate

when

emitter

and

collector

of

transistor

X803

are

short-circuited?

Does

platter

rotate

by

hand?

fs

output

available

at

voltage

terminals

of

Hall

elements

HG-1

and

HG-2?

Does

platter

rotate

when

pins

6

and

1

of

IC802

are

short-circuited?

IC802

defective.

1C803

defective.

Transistor

X803

is

open

be-

tween

emitter

and

collector.

Transistors

X805

—

X812

defective.

Lead

from

circuit

board

to

motor

discon-

nected.

Check

for

loose

socket,

floating

pattern

and

defective

soldering.

.

Check

for

incorrect

ca-

is

the

oscillation

waveform

pacitance

or

defective

solder-

available

at

TP-3?

ing

of

IC801.

1s

diode

D801

or

capacitor

C808

not

defective?

Yes

Replace

defective

part.

Notes

for

replacement

of

transistors

X809

—

X812

There

are

4

ranks

K1,

K2,

L1

and

L2

for

2SD571

transistor

hfe.

Be

sure

to

use

those

transistors

of

the

same

ranking

when

replacing.

Warning

!

1.

Be

careful

not

to

allow

metallic

dust,

etc.

to

enter

inside

the

unit,

be

cause

its

motor

is

comprised

of

magnetic

elements.

2.

After

replacement

of

the

X813

transistor,

apply

KE45RTV

(silicone

adhesive)

or

an

equivalent

material

around

the

transistor

for

thermal

con-

duction.

QL-A2

No.

2444

7-(2)

Platter

rotates

at

high

speed

Platter

rotates

at

high

speed.

Does

rotation

stop

when

1

of

1C803

is

connected

to

ground?

Does

rotation

stop

when

+22.0

V

is

applied

to

the

collector

of

transistor

X803?

Transistor

X804

or

X813

is

short-circuited

between

collector

and

emitter.

7-(3)

Rotation

is

not

locked

to

the

crystal

oscillator

frequency

Rotation

is

not

locked

to

the

crystal

oscillator

frequency.

Are

the

pulse

rectanguler

waveforms

of

50 Hz

and

67.5

Hz

available

at

5

of

'C803?

Yes

No

Is

the

9.504

MHz

oscillation

voltage

present

at

3

of

1C802?

Yes

No

Check

IC802

for

defect,

C806

or

C807

for

discon-

nection

or

pattern-cut.

OL-A2

No,

2444

Apply

+22.0

V

to

the

col-

lector

of

transistor

X803

and

stop

operation

of

the

drive

circuit.

Transistor

X803

is

short-

circuited

between

collector

and

emitter.

ls

adjustment

with

VR801

or

VR802

effective?

Yes

Readjust

following

justment

procedure”.

C814,

R820

or

C802

defective.

Replace.

Is

FG

output

6

MVp-p

present

Y

when

the

platter

is

rotated

=

by

hand

at

about

33-1/3

rpm?

No

Broken

connecting

wires

or

faulty

soldering.

Check

for

broken

patterns

No

or

faulty

soldering

Is

about

normal

rotation

obtained

with

R818

removed?

No

Yes

C811,

D802, C813,

R817

or

IC802

defective.

1s

5.8

Vp-p

output

present

at

7

of

IC801

when

the

platter

is

rotated

by

hand

at

about

33-1/3

rpm?

No

i

eer

8

ts

22.0

V

available

at

8

of

IC801.

Are

C809, C810,

VR801

and

VR802

correctly

employed?

No

Yes

Replace.

ts

the

rectangular

waveform

of

22

V

at

1

of

1C801

available

when

the

platter

is

rotated

by

hand

at

about

33-1/3

rpm?

Yes

No

Check

for

defettive

[C801

or

incorrect

capacitance

of

C803.

Defective

!C801,

incorrect

capacitance

of

C801

or

open

R803

may

be

the

cause.

Is

the

waveform

Yes

present

at

TP-3

as

shown

in

wiring

diagram

1?

No

ts

FG

output

as

specified?

Is

5.8

Vp-p

present

at

7

of

1C801?

Yes

No

Check

motor

or

replace

1C801.

rectangular

waveform

of

4.6

V

at

TP-3

available

when

the

platter

is

rotated

by

hand

at

about

33-1/3

rpm?

Yes

No

Check

for

broken

pattern

or

faulty

soldering

of

R808

and

R809.

Check

connection

or

solder-

ing

of

1C802.

1C801

defective.

DC2.1

V

availabié

available

at

1

of

at

7

of

IC802

when

Yes

1C803

when

the

platter

Yes

the

platter

rotated

by

hand

.

at

about

33-1/3

rpm?

is

rotated

by

hand

at

pm

about

33-1/3

rpm?

No

Check

for

defective

!C802,

Check

for

defective

1C803,

short-circuited

or

open

IC

short-circuited

or

open

!C

leads.

Normal

Warning

!

1.

Be

careful

not

to

allow

metallic

dust,

etc.

to

enter

inside

the

unit,

be

cause

its

motor

is

comprised

of

magnetic

elements.

2.

After

replacement

of

the

X813

transistor,

apply

KE45RTV

(silicone

adhesive)

or

an

equivalent

material

around

the

transistor

for

thermal

con-

duction.

8.

Cartridge

Replacement

.

Unscrew

the

connector

nut

to

remove

the

headshell.

2.

Remove

the

two

long

screws

on

the

headshell

which

hold

the

cartridge.

3.

Connect

the

lead

wires

of

the

headshell

to

the

new

cartridge,

being

careful

to

match

the

polarities

correctly.

Polarity

and

wire

colors

are

as

follows:

White

(+)

....L

Red

(+)......

R

Blue

(-)

.....

LE

Green(-)

....

RE

4.

Attach

the

cartridge

to

the

headshell

squarely,

and

gently

tighten

the

screws.

5.

Set

the

cueing

lever

to

“DOWN”,

and

then

bring

the

stylus

tip

to

the

overhang

indicator

by

sliding

the

cartridge

back

and

forth.

After

the

adjustment,

fix

it

firmly.

6.

After

attaching

the

cartridge,

slide

the

headshell

into

the

tonearm

with

the

connector

fitting

in

the

groove.

Tighten

the

connector

nut.

_

9,

Adjustment

Procedures

7.

Be

sure

to

adjust

the

tracking

force

and

lead-in

position

after

replacing

the

cartridge.

Screw

Plastic

washer

?

4

A

Headshell

R

“—

Cartridge

pin—___

{4

Cartridge

body

~~

!

ue

Stylus

_

Groove

Connector

Headshell

Connector

nut

Fig.

12

Fig.

13

Servomotor

Control

Section

9-(1)

Power

Supply

Voltage

Check

1.

Disconnect

the

motor

socket

from

the

circuit

board.

Turn

the

power

switch

on.

(Confirm

that

the

rated

voltage

is

applied

to

the

unit.)

Confirm

that

22

+0.5

V

DC

is

present

at

TP-5.

If

the

voltage

is

deviate

from

that

range,

adjust

with

the

semi-fixed

resistor

VR803

(1

k{2).

2.

Confirm

that

the

voltage

difference

at

TP-5

is

less

than

-1V

when

the

platter

is

stalled

with

hand.

9-(2)

Lock

Adjustment

1)

With

dual

beam

oscilloscope

1.

Connect

the

motor

socket

to

the

circuit

board.

Connect

the

dual

beam

oscilloscope

to

TP-3,

TP-4.

Obtain

a

turntable

speed

of

45

rpm

by

setting

the

speed

select

switch

to

45

and

turn

the

power

switch

on,

then

adjust

the

semi-fixed

resistor

VR802

(100

k{Q2)

until

the

follow-

ing

waveforms

are

obtained.

14.8

ms

(20ms)

ee

Fig.

14

Adjust

to

get

a

difference

of

within

+

1

msec

from

TP4.

2.

Obtain

a

turntable

speed

of

33-1/3

rpm

by

setting

the

speed

select

switch

to

33-1/3,

then

adjust

the

semi-

fixed

resistor

VR801

(47kQ)

until

the

difference

between

TP-3

and

TP-4

is

within

+

1

msec.

2)

With

single

beam

oscilloscope

Connect

the

single

beam

oscilloscope

to

TP-3,

TP-4

as

shown

in

Fig.

15

below.

Adjust

until

the

waveforms

shown

in

Fig.

16

are

obtained.

The

allowable

deviation

for

adjustment

should

be

within

1

msec.

as

shown

in

Fig.

16,

Fig.

17.

Connection

diagram

Ma

imMn

TPS

TP-3

Precaution

if

the

measurement

As

of

TP-3

is

required,

connect

the

output

of

test

equipment

to

TP-3

through

10

kQ

resistor.

Single

beam

oscilloscope

Within

1

msec

Fig.

15

Fig.

16

Ov

Within

1

msec

=e

Fig.

17

Ov

QL-A2

No,

244

F

;

4

Tonearm

Section

Adjustment

The

following

adjustments

should

be

performed

only

when

replacing

a

cartridge

or

a

headshell.

Otherwise,

no

adjustment

is

required.

Note:

If

necessary

to

replace

a

cartridge,

usage

of

that

headshell

exclusive

to

this

unit

is

recommended.

9-(3)

Overhang

Adjustment

Loosen

the

stylus

mounting

screws

and

slide

the

cartridge

to

adjust

the

stylus

tip

position

so

that

tip

is

coming

just

over

the

overhang

indicator.

(See

Fig.

18.)

Overhang

indicator

9-(4)

Tonearm

Lifter

Height

Adjustment

Adjust

the

height

of

tonearm

lifter

with

the

adjustment

“ah

screw

so

that

the

distance

between

the

stylus

tip

and

the

Fo

surface

of

record

is

about

6

mm

when

the

stylus

is

elevated.

Turn

the

height

adjustment

screw

clockwise

to

lower,

and

counterclockwise

to

raise

the

tonearm

lifter

level.

(See

Fig.

19.)

9-(5)

Auto-return

(Lead-out)

Adjustment

When

the

pulley

has

been

replaced

for

a

different

record

or

Pick-up

Shaft

if

auto-return

functions

early,

adjust

as

shown

in

Fig.

20.

—

When

change

cycle

starts

too

late,

turn

the

screw

counterclockwise

with

a

screwdriver.

—

When

change

cycle

starts

too

early,

turn

the

screw

clockwise.

Driver

Adjustment

Screw

Trip

Slide

OL-A2

No.

2444

=i:

Fig.

18

Adjustment

screw

Fig,

19

Fig.

20

JVC QL-A2 Bedienungsanleitung

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