Technics SL-1200 Mk2 Service manual

ORDER

NO.SD7908-1601

Service

Manual

service

This

andisnot

only

contain potential

by

electricity

professional or,,products

in..serious

rest''

SL-12

A

WARNING

designed

literature

warnings

dangers

technicians.C

dealt

"

*The

is

designed

cau:'.ons

or

in

attempting

should

with

injuryordeath

The

model model

be

in

SL-11

SL-1200MK2

for

use

to

serviced

attempt

.iy

service

this

.

200MK2

Turntable

OM

(M),

experienced

for

the

general

by

non-technical

advise

a

service

repaired

or

to

service

literature

(M)isavailableinU.S.A.only (MC)

repair

public

.

Products

product

only

or

repair

anyone

t

;+

is

availableinCanada

by

System

K2

(MC)

technicians

It

does

.

individuals

powered

experienced

the

product

could

else

not

of

only

.

SPECIFICATIONS General

supply

Power Power

Dimensions

(WxHxD)

Weight

Turntable

Type

:

Drive Motor Turntable

Turntablespeeds Pitch control ;

:carting

Build-up

characteristics Braking Speed

load Wow

and

*

This

effects

platter.Measuredby

quency

:

consumption

:

section

method

:

platter

:

torque

:

system

:

change

due

torque

:

flutter

:

rating

refers

of record,

generatorofmotor

Specifications subject to

120

V,AC,50or60Hz

:

12W

45

.3x16.2 (17-27/32"x6-19/64"xl4-11/64") 11

kg (24.3lb)

Quartz Manual Direct BrushlessDCmotor Aluminum Diameter33.2cm(13-5/64")

Weight

33-1/3 All

quartz-locked

1.5kg-cm(1.3

0

.7 s.from

Electronic

to

0%

within1.0

0

.01%

0

.025%

±0

.035%

to turntable

cartridge

obtaining

x36

direct

drive

turntable

drive

diecast

2 kg(4.4 lb

rpm

and

Ib-in)

standstillto33-1/3

brake

kg-cm

WRMS*

WRMS

assembly

peak assembly

or

tonarm,

signal

(JIS

(IEC

.

cm

45

±8%

from

.)

rpm

(0

C5521) 98A

alone,

but

range

Ib-in)

.87

Weighted)

excluding

including

built-in

change

rpm

fre-

without

notice

.

Rumble

:

Tonearm

Type

:

Effective

Arm

height

range

:

Overhang Effective Offset angle Friction Tracking

Stylus

Applicable

Headshell

:

pressure

adjustment weight

(with

auxiliary

weight)

(with

shell

Cud

All copying

Weight

and

section

length

:

adjustment

: mass

:

error angle

range

cartridge

range

:

weight):3

weight

:

Matsushita

rights

reserved

and

dimensions

-56

dB(IEC

-78

dB

Universal

230mm

31

.8-37.8mm

(1-21

/32"-3-35/64") (helicoid 15

mm

12 g

(without

22

°

Less

than7mg

Within2°

:

30

cm

(12") record

Within0°

cm

(12") record

30

:

0-2.5g

g

6-10

13

.5-17

9

.5-13

17-20.5g

.5-6.5g

11-14g(including

7.5g

Electric

Industrial

.

Unauthenzed

distribution

is

a

shown

are

98A

Unweighted)

(IEC

98A

Weighted)

(9-1/16")

(helicoid

part

15/64")

(19/32")

cartridge)

(lateral,

the

32'

(at

32'

the

(at

.5g(including

g

(including

Co.Ltd

.

violation

of

law

approximate

part6mm)

vertical)

outer

groove

inner

groove

headshell)

.

of

Panasonic

DivisionofMatsushita CorporationofAmerica One

New

Company

Panasonic

Jersey

Way,

07094

Electric

Secaucus,

Panasonic 320

Waiakamilo

.Hawaii

96817

Hawaii,

Inc

Road,

.

Honolulu,

Matsushita 5770

Ambler

Mississauga,

ElectricofCanada

Drive,

Ontario

LAW

2T3

Ltd

.

SL-1200MK2

CONTENTS

DISASSEMBLY PARTS

IDENTIFICATIONS

ARM

BASE

FEATURES

ADJUSTMENTS SCHEMATIC

REPLACEMENT TROUBLE

SHOOTING

PROCEDURE

ASSEMBLING

.

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

. ..... . . . . . . . . . . ... . ... . . . . . . . . . . ...6

DIAGRAM

PARTS

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

. . . ... . . . ... . . . . . . . . . . . . . . .3

PROCEDURE.. . ... . . . . ... . ...4

.

... . . .

LIST

. ....... . . . . . . ... . . . . . . . . . . . . .10

. . . . ...

. . .

(Electrical)

. . . . . . . .

..... . . . . . . . . ...9

. . .

2,3

5

7,8

PRINTED ADJUSTMENT REFERENCE

. . . . . . . . .

BLOCK

DIAGRAM.. . ... . . . . . . . . . . . . ..... . ... . . . . .

EXPLODED REPLACEMENT EXPLODED

CIRCUIT

BOARD

(Electrical)

VOLTAGE

...

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

VIEWS.. . . . . . . . . . . . . . . . . . . ..... . . . . . . .

PARTS

VIEWS

. . ... . ... . . . . ... . ..... . . . . . . . . .20

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

. . . . . . . . . .

AND

WAVEFORM

LIST

(Mechanical)

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

AT

. ... . . . . . . . . .19

EACH

11,12

13

IC

13,14 15,16 17,18

DISASSEMBLY

How

to

remove

1.Remove

2.Secure

3.Remove5screws Fig

. 1

.

How

to

remove

coil

4.Remove

power

transformerasshown

5.Remove3screws

screws©of

6.Disconnect

4

soldered

Fig.3

.

7.Remove3screwsQof

in

Fig.3

How

to

remove

8.Remove

9.Remove

10.Remove How

to

remove

11.Remove ass'yasshowninFig.5

12.Remove1screwOas

panel

head

shell

and

arm

with

arm

O

stater

3

connectorsOand

@

the

stater

18

soldered

parts

OoftheF.G detector

.

bottom

4

audio

insulators.(Counterclockwise

17

screws

and

11

screwsOas

stylus-illuminator

2

screws

PROCEDURE

cover

turntable

clamp

.

of

the

panel coverasshown

frame

Q

coil

in

of

the

drive

frame

coverasshowninFig.2

partsOof

the

stater

base

ass'y

spacerQas

shown

of

the

.

showninFig.6

.

2

read

Fig.2

frame

andF.G

.

circuit

the

detector

wires@from

board

and

stater

coil

coil as

show

ass'yasshown

rotation)

showinFig.4

in

Fig.4

.

lamp

stylus-illuminator

.

in

3

.

and

in

lamp

How

to

remove

13.Remove4

14.Remove1circlip Fig.5

.

15.Remove How

to

remove

16.Remove4screws Fig.5

.

17.Remove

showninFig

18.Remove

19.Remove

in

Fig

.

neon-illuminatorL.E.D.

screwsQas

Q

strobo-illuminator

tone

arm

Q

2

screws

phono 2

screwsQof

8

.

©

.

5

. cord

clamperasshowninFig.7

20.Remove2screws©as

21.Remove2screwsQof in

Fig.8

.

22.Remove3screwsQas

23

.

Remove Fig

2

screws

.

9

.

0

showninFig.5

and

switch

case

.

of

the

arm

base

of

the

phono

the

phono

shown

in

the

silicon

showninFig.8 of

the

tone

.

cam

as

shown

QQ

coverasshown

cord

clamper

.

cordp.c.b.asshown

Fig.8

.

oil

dumperasshown

.

arm

as

shown

in

as

in

Lamp

caset

Fig

.

Fig

9

.

m

PARTS

Hinge

Power

switch

Strobe-illuminator/

pilot

Speed

lamp

IDENTIFICATION

select

buttons

Arm-height

adjustment

Balance

ring

weight

Fig.10

10

.

ARM

1.Attach

2.Completely

control

1

.5---2 .5

BASE

the control

ring

shouldberoated

tighten

turns to

ASSEMBLING

ring

to the

counterclockwise

the

control

set

the

scaleto"3".(See Fig.11)

ring,

PROCEDURE

arm

base

and

seat.(The

.)

then

loosen

5.Rotate shifts

it

base parts

the control

within

the

rangeof0-6mm.(See Figs.14

If it

not

does positionisdeflected.In

and

shift

checkasspecifiedinstep 3

ring

within

and

make

the

that

sure

specified

case,

.

that the

range,

disassemble

arm

and the

base

15)

arm

the

3.Hold

4.Adjust

the base to the clockwise Note

:

Take

care positions

baseissettothe secure

(See

of

the

Fig.13)

arm

base

scale

.

(See Fig.12)

not

to allow

the

control

arm

base

positioning

and

near

so

scale

set

the

"2", then

deflection

ring

and

that the

"3"

of the

base

plate

red

arm

line

turn the

of the

base

line

control

with

markon

arm

predetermined

seat

.

mark

on

ring.Next,

two

setscrews

the

base

Fig.12

the

arm

®

ADJUST

SPRING

If

the

arm

the

canceller

celler

springisin

if

the

canceller

1.Clamp

2.Set

the

.

3.Remove canceller

4.Mount the

spring

ENT

POSITION

body

or

PU

knob

to"0.5"

contact

springisdeflected,

the

armonthe

canceller

the springisin

the

PU

base

position

knobto"0

OF

base

plateisreplaced,besure to

and

with

rest

.

.5"

base

plate,

the

positionofFig.16

plate

onto

.

CANCELLER

make

sure that the can-

the

arm

shaft.(See Fig.16)

adjustitas

.

adjust gearQso that the

the

arm

follows

.

base

and

:

cit~ck

set

4

FEATURES

Total

f8%

Quartz-phase-locked of But circuit With tinuously locked

lever,

+6%,+3.3%, from

Aluminum base

The

The And rubber excellent The ly thick turntable sheet feet also Thesefeatures high

High The starting enabling quarterofa sional

Stylus You'll the

canbehiddeninthe

simply beam tonearm

quartz locked

turntable

with

mustbecut

the

control

located

Four

linesofplatter

rated

material

effects

in

the turntable

turntable the

material

turntable

fabricat

help to

sound

torque

integral

torque.This

the

applications

illuminator

appreciate

turntable

pushabutton

of

.

rotation

most

quartz

out

SL-1200MK2,

(analogically)

The

.

to

the

0%

(exact

speed

.

diecast

provide

of external

this

by

baseisprecision-made

undersideofthe

(special

vibration

rubber

pressure

light

resistance

platterisalso

mattinginthe

absorb

make

for

fast

rotor/platter

plattertoreach

turn).Thisisa

where

the

under

across

continuous

control

.

turntables,

when

however,

by

pitch

right

of

markings

rated

cabinet

acoustic vibrations new

(rubber

unwanted

SL-11

200MK2

levels

.

starts

motor

high

fast

for

low-light

stylus

low-light

turntable anditwill

the

discinthe

adjustment

pitch

means

almost

perfect

this

accurate

the

pitch

controlisemployed

pitchisvariable

up

to

±8%

under

total

controlled

is

turntable

the

are

speed)

and

turntable construction

main

one-piece

and

vibration-damped

mat).Four

delivers1.5kg-cm(1.3lb-in)

torque

33-1/3

big

cueingisa

illuminator

conditions.The

provided

also

and

special

isolation

are

dramatically

baseismade

molding)

absorbing

underside along

vibrations

ideal

gives

rpm

advantageinmany

conditions

base,

should

popupgently

area

large

with

a

platter

-3

.3%

heavy

aluminum

characteristics

with

large-size

.

for

use

very

quick

within0.7s.

necessity

when

you

traversedbythe

accuracy

control

con-

quartz-

sliding

.

indicating

change

rubber

reduced

.

diecast

ofaheavy

which

with

illuminator

has

special-

with

the

insulating

extra-

starts

profes-

.

are

using

need

it,

and

cast

(a

a

SL-1200MK2

You

can

on the

illuminator

The base

.

High tonearm

The

highly suspension, definedatone

microns.This

±0

.5

to

the

(0

.007

to

this headshell, patible cartridges.If cartridge, the

correct without tonearmisprovided withacomputer high-rigidity to

resist

shell

interchangeability.Contacts

Helicoid

Arm

heightisadjustable modate withaprecision-made

Other

"

Quick system

"Astrobe

trolledbythe than Power ease-of-operation Soft-touch

capability

"

Technics full

cycle

clearly

then

record,

sensitivity,

sensitive

the

bearings,

g)

for

both

the

low 12-gram

without

with

the

you

the

low

area to

entering

headshell

partial

tonearm

varying

fine features

stops .

illuminatorisprovided.The

potentially

on/off

start-stop

without

integral

detectionFG.

see

the spaces

and

cue the

can

then

low

tonearm

rotational

Bearings

point

.

and

the

resultinthe

horizontal

effective

cartridge)

wide

rangeofcompliances

choose a

range

resonance

avoid

warp

the

low

endofthe

madeofsingle-piece diecast

vibration.The

height

withinarangeof6

cartridge

are

extremely

control

dimensions.Adjustments

helicoid

achieved

unstableACline

built-into

.

switch

the

annoyanceofaccidental

rotor/platter

between

arm

exactly

be pushed back

mass,

featuresagenuine

center

are

extra-closeness of

minimal

and

popular

frequencies

universal

adjustment

.

withafully

stable

allowing

where

gimbal

of

whichisprecisely

finishedtoa

vertical

tonearm

you

haveatonearm

high

frequency

audio spectrum

designed,

design allows

are

gold-plated

electronic

stroboscopeiscon-

quartz

frequency

strobe

motor

construction

the

selections

you

wantit.

down

into

suspension

gimbal

tolerance

pivot

frictionof7

movement.Add

mass

(including

in

found compliance

of

oscillator,

illuminator

precision

today's

will

appear

records,

light-weight,

aluminum

.

mmtoaccom-

are

braking

.

control

operation

the

of

center

mg

com-

MM

in

but

.

This

head-

done

rather

for

with

.

)MK2

lections wantit. nto

the

~ension

gimbal

recisely

of

-

ance

t

center

f7

mg nt.Add icluding m

com-

today's

ice

MM

in

)pear As,

but

m.This

weight, iminum vs

head-

accomre

done

braking

is

con-

,

rather

for

itor

control eration )n

with

SL-1200MK2

ADJUSTMENTS

for

fre-

.

and

the

into

Adjustment

.

The a

scaleisprovidedonthe adjust

Be

sure to

scale

Heightofcartridge

.

of

For height

location

Caution

Be

sure to

in

the

height

.)

Lubrication Apply

operation The

typemotors

Please

.

height of the

and

example,ifthe

time

Pitch

control

18

and

19

When

the position is speed in a

lit

showing

range of

after

(either

Adjustment Figuresonthe

variable When

edge

pitch control

the strobe dotsin4

of the turntable

individual Note

:

The

strobe-illumination of minator quency

.

For

fine

effect

the

The

LED lamps

.

Adjustment The

arm-lift

record

surface

adjustedatthe

8-13mm If

.

the clearance

adjustment screw

pushing

the

Clockwise

-distance

Counterclockwise

-distance Note

:

As

the adjusting

the

adjustment

will

not

move

.

Alsobesure that the the

arm

lift

(fine

adjustment

.)

pitch

control

knobislocatedatthe

turningonthe power,

the

operating

33-1/3or45

0-±8%

condition

rpm).The

.

shouldbedone

indicator

show

.

stages

appeartobe

pitchesisshown.(See

LED

synchronized

adjustment adjustment illumination

of

height

of

accordingtothe

is

arm-lift

(distance

when

cueing

factory

becomes

the

not synchronized

height

before

too

clockwise

arm

lift

down

.

rotation

between

the

record

rotation

between

screw

while

freely

the

record

has

depressing

.

hexagonal

when

the

latterisreleased

of

speed)

center of the

on

the

approximate

marked

the green

for

pitch

basisofindicator

LED

the

predetermined

controlisvariable

percentages

at the

stationary,

Fig.19

.)

this

unit

employsastrobe-illu-

with

the

precise

turntable

speed, be sure to

LED

illumination

with

(See

Figs.20

between

the

stylus tip

leverisraised)

shippingtoapproximately

narrow

or

too

wide,

or

counterclockwise, while

and

stylus

tipisdecreased

and

stylus

tipisincreased

head,

be sure to

the

arm

lift,orthe

head

retracts

correctly

.

(See

Figs

indicator

scale

peripheral

variation

quartz

fluorescent

and

21

has

been

turn

make

screw

ofthe

tonearm

set

the

proper

referringtothe

(mm)

(H)

15 16 17 18 19

20 21

cartridge

adjust

ring

shouldbepositionedatthe

between2and3on

:

lock

the

tonearm

direction

adjustment

indicatedbythe

for the

(See

Fig.23

.)

2 or3dropsofoil

.

intervalismuch

(200-500

purchase

hours)

original

height

(See

Fig.22

canbeadjustedupto6mm,

ringin0.5mm

arm

height using the

table

.

Scale readingonthe

adjust

increments

arm-height

ring

0

1 2 3

4

5

heightis17.5mm,

intermediate

the

by

tonearm

once

longer

scale.(See

turning

arrow

.

after

than

every

that

Fig.22

the

after

for

arm

finishing

2000

conventional

.

oil.(Part

number

is

SFWO

adjust

the

.)

lock

hours'of

.)

arm-

knob

010

and

.

ring

the

.)

:ig.

(t)

appears

stahonaryatthe

(2)

appears

stahonaryatthe

slat,

appears

f3f (4)

appears

stahonary

17

onaryatthe

at

pitchof,611, pitchof"3.3% pitcho;1

the

pitcho33%

1

Fig

19

.