Technics SL 1200_Mk2 Service Manual 1200 Mk2

User Manual: Technics-SL-1200_Mk2-Service-Manual

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Service Manual

ORDER NO . SD7908-1601

Turntable System

SL-12 OM K2
(M), (MC)
A WARNING

experienced repair technicians
This service literature is designed for
the general public . It does not
for
use
by
designed
and
is
not
only
non-technical individuals of
contain warnings or cau:'.ons to advise
. Products powered
a
potential dangers in attempting to service product
repaired only by experienced
or
be
serviced
should
by electricity
or repair the product
professional technicians. C.iy attempt to service
t;+ anyone else could
or,,products dealt with in this service literature
rest'' in.. serious injury or death .

" The model SL-11 200MK2 (M) is available in U .S .A . only .
*The model SL-1200MK2 (MC) is available in Canada only .

SPECIFICATIONS
General

Power supply :
Power consumption :
Dimensions :
(WxHxD)
Weight :

Turntable section
Type :

Drive method :
Motor :
Turntable platter:
Turntable speeds :
Pitch control :
;:carting torque :
Build-up
characteristics :
Braking system :
Speed change due to
load torque :
Wow and flutter :

Specifications subject to change without notice . Weight and dimensions shown are approximate .
120 V,AC,50or60Hz
12W
45 .3x 16 .2 x36 cm
(17-27/32"x6-19/64"x l 4-11/64")
11 kg (24 .3 lb)
Quartz direct drive
Manual turntable
Direct drive
Brushless DC motor
Aluminum diecast
Diameter 33 .2 cm (13-5/64")
Weight 2 kg (4 .4 lb .)
33-1/3 rpm and 45 rpm
All quartz-locked ±8% range
1 .5 kg-cm (1 .3 Ib-in)
0 .7 s . from standstill to 33-1/3 rpm
Electronic brake

0% within 1 .0 kg-cm (0 .87 Ib-in)
0 .01% WRMS*
0 .025% WRMS (JIS C5521)
±0 .035% peak (IEC 98A Weighted)
* This rating refers to turntable assembly alone, excluding
effects of record, cartridge or tonarm, but including
platter . Measured by obtaining signal from built-in frequency generator of motor assembly .

Rumble :

-56 dB (I EC 98A Unweighted)
-78 dB (IEC 98A Weighted)

Tonearm section

Type :
Effective length :
Arm height adjustment
range :
Overhang :
Effective mass :
Offset angle :
Friction :
Tracking error angle :

Stylus pressure
adjustment range :
Applicable cartridge
weight range :
(with auxiliary
weight) :
(with shell weight) :
Headshell weight :

Universal
230mm (9-1/16")
31 .8-37 .8 mm (helicoid part 6 mm)
(1-21 /32"-3-35/64")
(helicoid part 15/64")
15 mm (19/32")
12 g (without cartridge)
22°
Less than 7 mg (lateral, vertical)
Within 2 ° 32' (at the outer groove of
30 cm (12") record
Within 0 ° 32' (at the inner groove of
30 cm (12") record
0-2 .5 g
6-10 g
13 .5-17 .5 g (including headshell)
9 .5-13 g
17-20 .5 g (including headshell)
3 .5-6 .5 g
11-14 g (including headshell)
7 .5 g

Cud Matsushita Electric Industrial Co . Ltd.
All rights reserved . Unauthenzed
copying and distribution is a violation of law

Panasonic Company
Panasonic Hawaii, Inc .
Division of Matsushita Electric
320 Waiakamilo Road, Honolulu,
Corporation of America
.Hawaii 96817
One Panasonic Way, Secaucus,
New Jersey 07094

Matsushita Electric of Canada Ltd .
5770 Ambler Drive,
Mississauga, Ontario
LAW 2T3

SL-1200MK2
CONTENTS
DISASSEMBLY PROCEDURE . . . . . . . . .
PARTS IDENTIFICATIONS . . . . . . . . . . .
ARM BASE ASSEMBLING PROCEDURE.
FEATURES . . . . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . .
SCHEMATIC DIAGRAM . . . . . . .
. .
REPLACEMENT PARTS LIST (Electrical)
.. .
TROUBLE SHOOTING . . . . . . . . . . . . . .

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

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. 2,3
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3
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4
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5
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6
. 7,8
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9
. 10

DISASSEMBLY PROCEDURE
How to remove panel cover
1 . Remove head shell and turntable.
2 . Secure arm with arm clamp .
3 . Remove 5 screws O of the panel cover as shown in
Fig. 1 .
How to remove stater frame coil and F.G detector
coil
4 . Remove 3 connectors O and 2 read wires @ from
power transformer as shown in Fig. 2.
5 . Remove 3 screws @ of the drive circuit board and 3
screws © of the stater frame cover as shown in Fig. 2.
6 . Disconnect 18 soldered parts O of the stater coil and
4 soldered parts O of the F.G detector coil as show in
Fig. 3.
7 . Remove 3 screws Q of the stater frame ass'y as shown
in Fig. 3.
How to remove bottom base ass'y
8. Remove 4 audio insulators . (Counterclockwise rotation)
9. Remove 17 screws and spacer Q as show in Fig. 4.
10 . Remove 11 screws O as shown in Fig. 4.
How to remove stylus-illuminator lamp
11 . Remove 2 screws Q of the stylus-illuminator lamp
ass'y as shown in Fig . 5.
12 . Remove 1 screw O as shown in Fig. 6.
How to remove neon-illuminator L .E .D .
13 . Remov e 4 screws Q as shown in Fig. 5.
14 . Remove 1 circlip Q and switch cam QQ as shown in
Fig. 5.
15 . Remove strobo-illuminator case .
How to remove tone arm
16 . Remove 4 screws Q of the arm base cover as shown in
Fig . 5.
17 . Remove 2 screws © of the phono cord clamper as
shown in Fig. 5 .
18 . Remove phono cord clamper as shown in Fig. 7.
19 . Remove 2 screws Q of the phono cord p.c .b . as shown
in Fig . 8.
20 . Remove 2 screws © as shown in Fig . 8.
21 . Remove 2 screws Q of the silicon oil dumper as shown
in Fig. 8 .
22 . Remove 3 screws Q as shown in Fig. 8 .
23 . Remove 2 screws 0 of the tone arm as shown in
Fig. 9.

PRINTED CIRCUIT BOARD . . . . . . . . . . . . . . . . . . . . .
ADJUSTMENT (Electrical) . . . . . . . . . . . . . . . . . . . . . . .
REFERENCE VOLTAGE AND WAVEFORM AT EACH
PIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EXPLODED VIEWS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REPLACEMENT PARTS LIST (Mechanical) . . . . . . . . . .
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.. .
.. .
IC
.. .
.. .
.. .
.. .
.. .

11,12
13
13,14
15,16
17,18
19
20

Lamp caset

Fig . 9

Fig .

m PARTS IDENTIFICATION
Hinge

Arm-height adjustment ring

Balance weight

Power switch
Strobe-illuminator/
pilot lamp

Speed select buttons

Fig . 10

10

. ARM BASE ASSEMBLING PROCEDURE
1 . Attach the control ring to the arm base seat . (The
control ring should be roated counterclockwise .)
2 . Completely tighten the control ring, and then loosen it
1 .5---2 .5 turns to set the scale to "3" . (See Fig . 11)

5 . Rotate the control ring and make sure that the arm base
shifts within the range of 0-6mm . (See Figs . 14 and 15)
If it does not shift within the specified range, the arm
base position is deflected . In that case, disassemble the
parts and check as specified in step 3 .

3 . Hold the arm base and set the red line mark on the arm
base to the scale near "2", then turn the arm base
clockwise . (See Fig . 12)
Note :
Take care not to allow deflection of the predetermined
positions of the control ring and arm base seat .

® ADJUST ENT OF CANCELLER
SPRING POSITION
Fig . 12
4 . Adjust the arm base so that the red line mark on the arm
base is set to the scale "3" of the control ring . Next,
secure the positioning base plate with two setscrews .
(See Fig . 13)

4

If the arm body or PU base plate is replaced, be sure to set
the canceller knob to "0 .5" and make sure that the canceller spring is in contact with the arm shaft . (See Fig . 16)
if the canceller spring is deflected, adjust it as follows :
1 . Clamp the arm on the rest .
2 . Set the canceller knob to "0 .5" .
3 . Remove the PU base plate, adjust gear Q so that the
canceller spring is in the position of Fig . 16 .
4 . Mount the PU base plate onto the arm base and cit~ck
the spring position .

SL-1200MK2
FEATURES

Total quartz locked continuous pitch adjustment
f8%
Quartz-phase-locked control means almost perfect accuracy
of turntable rotation .
But with most quartz turntables, this accurate control
circuit must be cut out when the pitch control is employed .
With the SL-1200MK2, however, pitch is variable continuously (analogically) by up to ±8% under total quartzlocked control . The pitch is controlled with a large sliding
lever, located to the right of the turntable platter .
Four lines of platter markings are also provided indicating
+6%, +3 .3%, 0% (exact rated speed) and -3 .3% change
from rated speed .
Aluminum diecast cabinet and special heavy rubber
base material provide acoustic isolation
The effects of external vibrations are dramatically reduced
in the turntable by this new turntable construction .
The turntable base is precision-made aluminum diecast.
And the underside of the main base is made of a heavy
rubber material (special one-piece molding) which has
excellent vibration resistance and absorbing characteristics .
The turntable platter is also vibration-damped with specially fabricat rubber matting in the underside along with the
thick turntable sheet (rubber mat) . Four large-size insulating
feet also help to absorb unwanted vibrations .
These features make SL-11 200MK2 ideal for use with extrahigh sound pressure levels .
High torque for fast starts
The integral rotor/platter motor delivers 1 .5kg-cm (1 .3lb-in)
starting torque . This high torque gives very quick starts
enabling the platter to reach 33-1/3 rpm within 0 .7 s. (a
quarter of a turn) . This is a big advantage in many professional applications where fast cueing is a necessity.
Stylus illuminator for low-light conditions
You'll appreciate the stylus illuminator when you are using
the turntable under low-light conditions . The illuminator
can be hidden in the turntable base, should you need it,
simply push a button and it will pop up gently and cast a
beam of light across the disc in the area traversed by the
tonearm .

You can then clearly see the spaces between the selections
on the record, and cue the arm exactly where you want it .
The illuminator can then be pushed back down into the
base .
High sensitivity, low mass, gimbal suspension
tonearm
The highly sensitive tonearm features a genuine gimbal
suspension, the rotational center of which is precisely
defined at one point. Bearings are finished to a tolerance of
±0 .5 microns. This and the extra-closeness of pivot center
to the bearings, result in the minimal friction of 7 mg
(0 .007 g) for both horizontal and vertical movement . Add
to this the low 12-gram effective tonearm mass (including
headshell, without cartridge) and you have a tonearm compatible with the wide range of compliances found in today's
cartridges . If you choose a popular high compliance MM
cartridge, the low range resonance frequency will appear in
the correct area to avoid warp frequencies of records, but
without entering the low end of the audio spectrum . This
tonearm is provided with a computer designed, light-weight,
high-rigidity headshell made of single-piece diecast aluminum
to resist partial vibration. The universal design allows headshell interchangeability . Contacts are gold-plated .
Helicoid tonearm height adjustment
Arm height is adjustable within a range of 6 mm to accommodate varying cartridge dimensions . Adjustments are done
with a precision-made helicoid .
Other fine features
" Quick stops are achieved with a fully electronic braking
system .
" A strobe illuminator is provided . The stroboscope is controlled by the extremely stable quartz oscillator, rather
than potentially unstable AC line frequency.
Power on/off control built-into strobe illuminator for
ease-of-operation .
Soft-touch start-stop switch allowing precision control
capability without the annoyance of accidental operation.
" Technics integral rotor/platter motor construction with
full cycle detection FG .

)MK2
lections
want it .
nto the

~ension
gimbal
recisely
- ance of
t center
f7 mg
nt . Add
icluding
m comtoday's
ice MM
)pear in
As, but
m . This
weight,
iminum
vs head-

accomre done

braking
is con, rather
itor for
control
eration .
)n with

: ig . 17

SL-1200MK2
ADJUSTMENTS

Pitch control (fine adjustment of speed) (See Figs .
18 and 19 .)
When the pitch control knob is located at the center of the
position after turning on the power, the green LED indicator
is lit showing the operating condition for the predetermined
speed (either 33-1/3 or 45 rpm) . The pitch control is variable
in a range of 0-±8% .
Adjustment should be done on the basis of indicator scale .
Figures on the indicator show approximate percentages for
variable pitch control .
When the strobe dots in 4 stages marked at the peripheral
edge of the turntable appear to be stationary, variation of
individual pitches is shown . (See Fig . 19 .)
Note :
The strobe-illumination of this unit employs a strobe-illuminator LED synchronized with the precise quartz frequency .
For fine adjustment of the turntable speed, be sure to
effect the adjustment according to the LED illumination .
The LED illumination is not synchronized with fluorescent
lamps .
Adjustment of arm-lift height (See Figs . 20 and 21 .)
The arm-lift height (distance between the stylus tip and
record surface when cueing lever is raised) has been
adjusted at the factory before shipping to approximately
8-13mm .
If the clearance becomes too narrow or too wide, turn the
adjustment screw clockwise or counterclockwise, while
pushing the arm lift down .
Clockwise rotation
-distance between the record and stylus tip is decreased .
Counterclockwise rotation
-distance between the record and stylus tip is increased .
Note :
As the adjusting screw has hexagonal head, be sure to make
the adjustment while depressing the arm lift, or the screw
will not move freely .
Also be sure that the hexagonal head retracts correctly into
the arm lift when the latter is released .

(t)

appears stahonary at the pitch
(2) appears slat,
stahonary at the pitch
onary at the pitch
f3f appears
(4) appears stahonary at the pitch

of ,611,
of " 3.3%
o ;11

o3 3%

Fig . 19

Adjustment of the tonearm height (See Fig . 22 .)
The height of the tonearm can be adjusted up to 6 mm, and
a scale is provided on the adjust ring in 0 .5 mm increments .
Be sure to set the proper arm height using the adjust ring
scale and referring to the table .
Height of cartridge (mm)
(H)
15
16
17
18
19
20
21

Scale reading on the arm-height
adjust ring
0
1
2
3
4
5

For example, if the cartridge height is 17 .5 mm, the armheight adjust ring should be positioned at the intermediate
location between 2 and 3 on the scale . (See Fig . 22 .)
Caution :
Be sure to lock the tonearm by turning the arm lock knob
in the direction indicated by the arrow after finishing the
height adjustment for the tonearm .
Lubrication (See Fig . 23 .)
Apply 2 or 3 drops of oil once after every 2000 hours'of
operation .
The time interval is much longer than that for conventional
type motors (200-500 hours) .
Please purchase original oil . (Part number is SFWO 010 .)

Schematic Diagram
2

(This schematic diagram maybe modified at anytime with the development of
3

6

5

4

7

D1

SVDSl RBA20

A

C

Q

POWER SWITCH

~pnai

{YtiO--~ iF
R601
r1
4.7
350 MA

B

120.6

ORG T .I

J
Q3

AC 117V (50/60Hz)

C
R5 4

BLU °}

TP4

'

D2

SVORD5.1E

C

R204

D

Braking

2.

TP21

adjustment

R205
VR201

50KB

TP22

R215 4 .7K
R214

22K

IC201

A N 6680

E

F

Adjustment of
pitch control
±0%(Pitch)

TF
Q202

Pitch Adjustment
(GAIN)

D204

G

MA150
VR303

PITCH LOCK SWITCH
PITCH CONTROL VOLUME

H

5203
S/S

D201, 202

5201
33

1 5202

SVDSR105C

45

SPEED SELECTOR SWITCH

STR(

IMPORTANT SAFETY NOTICE

THE SHADED AREA ON THIS SCHEMATIC DIAGRAM INCORPORATES SPECIAL FEATURES IMPORTANT FOR
SAFETY .
WHEN SERVICING IT IS ESSENTIAL THAT ONLY MANUFACTURER SPECIFIED PARTS BE USED FOR THE CRITICAL
COMPONENTS IN THE SHADED AREAS OF THE SCHEMATIC.

u

,development of new technology .)
7

9

8

~

10

fP3

220
P19

OVI

.213
Ilop
i

WITCH

D206
5401
D204

D205

PLl

STYLUS-ILLUMINATOR
STROBE ILLUMINATOR
NOTO :
1 . S201 : Speed selector switch (33-1/3 r.p .m .) in
"ON" position . (push condition)
2 . S202 : Speed selector switch (45 r .p .m .) in "OFF"
position . (not-push condition)
3 . S203 : Start/Stop switch in "OFF" position . (notpush condition)
4 . S301 : Pitch lock switch in "ON" position . (center
position)
5 . S401 : Stylus-illuminator switch in "OFF" position .

6 . S601 : Power switch in "ON" position .
7 . The drive circuit IC voltage and wave form are not
indicated in side the schematic diagram .
8 . Indicated voltage values are the standard values for
the unit measured by DC electronic circuit tester
(high impedance) with the chassis taken as
standard . Therefore, there may exist some errors in
the voltage values, depending on the internal impedance of the DC circuit tester .

REPLACEMENT PARTS LIST (Electrical)
Notes :

1.
2.
3.

Part numbers are indicated on most mechanical parts.
Please use this part number for parts orders.
© indicates that only parts specified by manufacturer be used for safety .
SL-1200MK2(M) + [MI , SL-1200MK2 (MC)+ (MC1

Ref . No .

Part No .

Ref, No.

Part Name & Description

INTEGRATED CIRCUITS
IC101
IC201
IC301
IC302

Integrated
Integrated
Integrated
Integrated

2SD389A-Q
2SD637
2SC1846-R
2SC1328-T

Transistor
Transistor
Transistor
Transistor

SVDSIRBA40
MA7051
MA162A
SVDSR-105C
SVDEBR5505S
SVDGL-9PG2

Rectifier
Diode,Zener5 .iV
Diode
Light Emitting Diode
Light Emitting Diode
Light Emitting Diode

SVQU306115

Crystal, 4 .19328MHz Oscillator

Circuit
Circuit
Circuit
Circuit

DIODES
A

D1
D2,301
D204
D201, 202
D203-206
D401
CRYSTAL
X201

VARIABLE RESISTORS
VR201
VR301

EVLS6AA00a54
EVMH2GAOOB53

VR302
VR303

EVLS6AAOOB54
EVBJ05Cl9ABE

Braking Adjustment (BRAKE), 50k(1 (B)
Adjustment of Pitch Control f0°%(PITCH),
5kn (B)
Pitch,Adjustlnent (Gain) 50kfl
Pitch Control Volume

EVQP5RO4K
EVQP5RO4K
SFDSSS5GLl3C
SFDSD2MSL-4
SFDSSS5GL-2

Switch,
Switch,
Switch,
Switch,
Switch,

SFDN122-01

Lamp, Stylus-illuminator

SWITCHES
S201
5202
S203
5401
S601

©

Speed Selector (33-1/3r .p.m .)
Speed Selector (45r .p .m .)
Start/Stop
Stylus-illuminator
Power

LAMP
PL1
TRANSFORMER
Tl

© ~SLT60EL)713

Power Transformer

©

XBA2FO3NU100

Fuse, 350mA

ERD25FJ562
ERD25FJ682
ERD25FJ272
ERD25FJ561
ERD25FJ471
ERD25FJ103
ERXIANJ4R7
ERD25FJ472
ERD25TJ473
ER026FJ403
ERD25FJISO
ERXIANJlR5

Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Metal Film,
Carbon,
Carbon,
Carbon,
Carbon,
Metal Film,

FUSE
F1
RESISTORS
R1
R2
R3
R4
R5
R101
R102
R103
R104
R105
R106
R107

©

©

1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1W,
1/4W,
1/4W,
1/4W,
1/4W,
1W,

6 .6k fl,
6 .8kfl,
2 .7kfl,
560fl,
470fl,
10kfl,
4 .7fl,
4 .7kfl,
47kQ,
10kfl,
1511,
1 .511,

t
t
t
t
t
t
t
t
t
t
t
t

5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%
5%

Part Name & Description

ERD25FJ103
ERXIANJ4R7
ERGlANJ561
EAD25FJ103
ERD25FJ470
ERD25FJ272
ERD25TJ124
ERD25TJ"183
ERD25TJ563
ERD25TJ224

Carbon,
Metal Film,
Metal Oxide,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,

10kn,
4 .7fl,
560fl,
1Okfl,
47fl,
2 .7kfl,
120kfl,
18kf1,
56kfl,
220k fl,

1/4W,
1W,
1W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,

t
t
t
t
t
t
t
t
t
t

5%
5%
5%
5%
5%
5%
5%
5°%
5%
5%

R209
R210
R211
R212
R213
8214
R215
R216
8217
R218

ER025TJ154
ERD25TJ183
ERD25FJ103
ERD25FJ121
ERD25FJ122
ERD25TJ223
ERD25FJ472
ERD25TJ154
ERD25TJ223
ERD25FJ102

Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,

150kfl,
18kf2,
1OkQ,
120fl,
1 .2kfl,
22kfl,
4 .7kfl,
150kfl,
22kf1,
lkfl,

1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,

t
t
t
t
t
t
t
t
t
t

5%
5%
5%
5%
5%
5%
5%
5%
5%
5%

R219
R220
R221
8301
R302
R303
R304
R306
R601

ERD25FJ332
ERD25FJ221
ERD25FJ471
ER025CKF3301
ERD25FJ471
ERD25FJ822
ERD25FJ152
ERD25TJ223
ERD25FJ4R7

Carbon,
Carbon,
Carbon,
Metal Film,
Carbon,
Carbon,
Carbon,
Carbon,
Carbon,

3 .3kf2,
22012,
47012,
3.3kfl,
470(2,
8.2kf2,
1 .5kfl,
22kfl,
4 .7(2,

1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,
1/4W,

t
t
t
t
t
t
t
t
t

5%
5%
5%
1%
5%
5%
5°%
5%
5%

Cl
C2
C3
C101, 102
C103
C104,105
C106,107
C108
C109, 110
C111

ECEBlHS471
ECEAIVS330
ECEAIES220
ECEAlVS330
ECEAlVS330
ECQMlH104KZ
ECQMlHl04KZ
ECEAlES101
ECQMIH104KZ
ECQMlH562KZ

Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Electrolytic,
Polyester,
Polyester,
Electrolytic,
Polyester,
Polyester,

470yF,
33juF,
22/AF,
33juF,
33pF,
0 .1PF,
0 .1,uF,
100UF,
0,1yF,
0 .0056pF,

50V
35V
25V
35V
35V
50V,
50V,
25V
50V,
50V,

0112
C201
C202,203
C204
C205
C206
C207
C208
C209
C210
C211
C212
C213
C214
C215

ECEAIJS4R7
ECEAICS330
ECEA50ZI
ECQMlH473KZ
ECEA1AS221
ECEA50ZI
ECCDIHt01K
ECCDlH390K
ECEAIES101
ECQMlH224KZ
ECQMlH473KZ
ECEA50Z3R3
ECCDlH47lK
ECEAIES101
ECEA50Z1

Electrolytic,
Electrolytic,
Electrolytic,
Polyester,
Electrolytic,
Electrolytic,
Ceramic,
Ceramic,
Electrolytic,
Polyester,
Polyester,
Electrolytic,
Ceramic,
Electrolytic,
Electrolytic,

4,7pF,
33pF,
luF,
0 .047liF,
220pF,
luF,
100pF,
39pF,
100pF,
0.22pF,
0.047pF,
3.3pF,
470pF,
100pF,
1uF,

63V
16V
50V
50V,
1ov
50V
50V,
50V,
16V
50V,
50V,
50V
50V,
25V
50V

ECEAIES470
ECQK1123FZ
ECEA50ZI
ECEA1HS100
ECQMlHl22KZ
ECEA50Z1
ECQFlA473MD
ECQUIA473ME

Electrolytic,
Polyester, -Electrolytic ;`'
ElectrOiytic,
Polyest& ; "
Electrolytic,
Polyester,
Polyester,

47uF,
25V
0.012pF,
125V,
I#F,
50V
10pF,
50V
0.0012pF, 50V,
1pF,
50V
0.047pF, 400V,
0.047pF, 400V,

8108
8109, 110
R201
R202
8203
R204
8205 R206
8207
R208

AN6675
AN6680
AN6682
SVITC4011BP

TRANSISTORS
Q1
Q2, 3, 202
Q201
Q203

Part No .
A
©

CAPACITORS

C216
C301,302
C303
C304
C305
C306
C601 [MI
C601 [MCI

©

©
A

0 TERMINAL GUIDE OF TRANSISTOR AND IC
AN6675

AN6682

SVITC4011BP

J22

r
13

AN6680

1
12

13

12 ~~

1

2SC1846

2SC1328

2SD389

2SD637

F
123456189

1:

BC

t10%
t10%
t10%
t10%

t10%
t10%
t10%
110%
t10%
t10%

t 1%
±10%
t20%
t20%

TROUBLE SHOOTING
Power switch doesn't
operate

(B)

I

It doesn't rotate
Start/Stop switch
"push"

Power circuity check

NO

Reference voltage circuity check
" TP5-20V

NO

" TP5 - 20V

F1, S601, T1
D1, 61.1 -Q3

YES
Control circuity check
" Check voltage and wave
form at IC201

NO

IC201
X201

Drive circuity check
" Check voltage and wave
form at IC101
YES

Runaway operation

heck voltage on Q201
" Base voltage - 10V

NO

Reference voltage circuity check
" TP5- 20V

NO

Q201

Q1 -Q3
D2

YES
Control circuity check
" Check voltage and wave
form at IC201

NO

Drive circuity check
" Check voltage and wave
form at IC101

NO

IC201

YES

Turntable rotates
abnormally

Speed changeover is
defective

(F)

Strobe not
illuminating

FG circuity check
" Check voltage on Q203

NO

Q203,
FG coil

Control circuity check
" Check voltage and wave
form at I C201

NO

X201
I C201

Pitch control circuity check
Check voltage and wave
form at IC301, IC302

NO

IC301
IC302

Speed select circuity check
" TP13 -3 .4V
" TP14-0V

NO

IC201
S 201, S 202
13201, 13202

NO

Q202
13203-. .13206

Check voltage at TP28 and TP29
" TP28 - 18AV
" TP29 - 9.6V

+ B lines
Earth (Ground) lines

Printed Circuit Board
2

A
D202

SPEED SELECTOR SWITCH

rr

02

B

S20f

133

C

START/STOP SWITCH

D

E

D204

D203

POWER TRANSFORMER

F

G
AC 117V
(50/60 Hz)

H
ORG
BLU

BLU

BRN

RED

5401

STYLUS-ILLUMINATOR SWITCH

RED

BLK

ORG
IC301

BLK

NL1

ORG

R401 1 .5K

IC302

SVITC4011 BP

r

YEL

AN6682

BRN

Q1

T

2S D389

zv

Q203

2SC1328
- 470
E

1+

73 . . -8 .2K
r~

.Mr305 0 .0012
IF.

16VID0

R21J t~

P2~4~~ .'2

~91 TP27

fi, k

7P74
BRN
R221 470
"---Mh-.-"
R 219 ::

RED
ORG YEL

R216
C202 50'11

150F

0203 OOVI
aft-

c2c5

__" PSi4T'~

L

10

TP
C21

FT

'T04 0 .0
"'
F . Q201 (6
R204-I2_7K

R211 10K
TP23

. iH.

A

s

k

206 5f

3.3

1

gar

C109 G
-if-R10 .1 1

X201
x-11
p (201

Rt

R101

C101 25V33

C20

DV33
10"

O

405 ll!t
0163

2v +3

6
8212 '20

C106
01
nC

~ RI :In }1.
rc,
-At~

BRN
RED
ORG
YEL
BLK
BLU
PPL

BLU

S601

POWER SWITCH

1601

AN6680
Q262

2SD637

5-of

R5 470

NOMINEE
0201

2SC 1846

IC101

A N 6675

_
BLU
B LU

Q2, 3

2S D637

SL-1200MK2 SL-12
ADJUSTMENT (Electrical)
Adjustments (Electrical)
Notes: 9 Make the following adjustments
Condition of the set .
1 . Power switch . . . . . . . . . . . .
2. Pitch control . . . . . . . . . . . .
3. Speed selector switch . . . . . .
Instruments to be used
1 . Tester
2. Frequency counter
Adjustment

(D

after replacing parts such as IC's, transistors, diodes, etc.
. ON
. Center position
. 33-1/3 r.p .m .

Connection Points

Adjustment Point

Adjustment
of pitch
control t0%
(PITCH)

Frequency counter
(2) -. TP27
0 - GROUND

VR301

1 . Pitch control switch to center position .
2. Adjust VR301 for 262.08 kHz 10 .05 kHz of
frequency.

B

Adjustment
of pitch
control gain

Tester
TP31 and
TP32

VR302

Adjust VR302 for 2.7 k92 t0.1 of resistance
value

C

Braking
adjustment
(BRAKE)

VR201

Adjust VR201 for complete stop within 120 ° - 270°
after stop signal initiated . (Turntable becomes free a
few seconds after stop)

A

-

Adjustment Method
O

OO

STOP SIGNAL

2700

Turntable
&1

0

REFERENCE VOLTAGE AND WAVEFORM AT EACH IC
PIN
IC101 (AN6675)
Stop

Start
2V
©
~3

O
Os
©
OO
08

2V

0v

Stop

©

=

©

15V

Start

15V

®

ov

sv

sV

5V ('S

sV q
sv 0

6 .6V

S

oV

ov

5V

5V

-00

15v

'

r

©

Start

2V (04""W
2V,~, , ..

*40"1

15V

,.,_

15V

©

15V

15V
209. ,

©

ov

15V

T

20V

15V

T

~

(S , f

©
®

ov

15V

Same as at right

©

20V

Stop
1""

,uV

20V ao .6
20V 10 .1

20V

20V

0 .2v

0.2V , t

o .l,

1 .7V

1 .7V

Q2

C

IC201 (AN6680)

Ot

T

T

Start

Stop

2 .5V

2 .5V

Start

41.

Same as at right

®

OV

1)

9 .8V

w

©

T5

©

Ov

v.xw
x.sv

®3

7
~oxw

Same as at right

3 .4V

OV

OV

,

-

T

OO

5V

2 .5VZ,OV

5V

5V

Ov

OV,?,7. ,V`

7 .5V

Ov

I

t

OV

®

1 .5V

Sv
OV

3V

3V

Ov

®

0 .2V

®

20-

i

i

~~
IV

2 .8V

®

4

.4
,qY

3V

r

2 .8V

®

-[A-,-!V

3 .4V

T7

o 9v

-

6v

Same as at right

,3J

Same as at right

A

LM
Q
I

iov

stop -:

Start

Ov
9 .8V

tov

fl fl
u u

Same as at right

Stop .

2.5V

©

8v

S .SV

sv

IC301 (AN6682)

Tt

T

Start

Stop

Same as at right

J U LJ L

Same as at right

Start
sv

®

T

'v

TO
©



Same as at right

Stop

lhf

t

,., ®

OV

Ov

3 .9V

3 .9V,(A

Stop

Same as at right

TB

-v

T'

-

9V

9v

w

Same as at right
Same as at right

Start

x.sv

~-

I

I

I

1

IC302 (SV ITC4011 BP)
Start
T1

Same as at right

Stop
41 ~~

5V
Ts
®

Same as at right
SV

Start

C

Start
OV

OO

OV

5V

Stop
OV
v
T

®

Same as at right

Start

5V
,

Stop

O

y,

5V
-~
Sv

Same as at right

B t Same as at right

Same as at right

5V
T4A

0202 (2SD637)
E

T5

Stop

,

OV I~t'~
Sv

©

t .
SV

BLOCK DIAGRAM

Position detection coil

0
U

D201
D202
D201
D202
S203

(33 r .p .m. indicator)
(45 r .p .m . indicator)
(33 r .p .m. switch)
(45 r .p .m . switch)
(Start/Stop switch)

01-2 .3

D1

AC line
50/60 Hz
Rectifier

IC201 (AN6680)
IC301 (AN6682)
Speed
control

0.S.C

0203
0

~ ca f
E
~E

c

C.R
OSC

c0 cli 1

P.C

C .P

PF

u u

CD

ci

_

vCC
2

3

9

{

!

0

U

~7

,n
0
M

v
S301
VR303

SrtUU'a

16

~C " tV h 1~

S301 PITCH LOCK
SWITCH

SL-1200MK2
EXPLODED VIEWS

POWER CIRCUIT P.C .B .

SL-12C

TONE ARM and ARM BASE ASS'Y

REPLACEMENT
Notes :

PARTS

1.

Part numbers are indicated on most mechanical parts .
Please use this part number for parts orders .
2 . © indicates that only parts specified by manufacturer be used for safety .
3 . SL-1200MK2(M) +(MI,SL-120wIK2(MC) +[MC1

Ref . No .

Part Name & Description

Part No .

CABINET and CHASSIS PARTS
1
2
3
4

LIST (Mechanical)

6
7
8
9
10

Dust Cover
Turntable Mat
Turntable
Cover, Turntable
Cover, Stater Frame Ass'y
Stater rame
FG Detector Coil Ass'y
Shaft, Stater Frame Ass'y
Plate, Shield
Cabinet

11
12
13
14
15
16
17
18
19
20

SFUM172-04
SFKT122-01
SFKK122-01E
SFKTO15-06
SFQA122-01
SFUM122-01
SF KTbtS-01E
SF DJ I22,02E
SFGZ122-01
SFYB5-32

Ornament, Stylus-illuminator
Knob, Power Switch
Case, Strobe-illuminator
Knob, Start/Stop Switch
Spring, Start/S1op Knob
Base, Operation
Knob, Speed Selector (33-1/3r .p .m .)
Connector, 7-PIN
Spacer, Rubber (Speed Selector)
Ball, Switch Cam

21
22
23
24
25__
26
27
28
29
30

SFQA520-01
SFUM122-03
SFUM015-11
SF KK172-01
SFXB122-02
SFQA172-01
SFXJ172-01
SFUP122-02E
SFUP122-03
SFDJ122-03E

31
32
33
34
35
36
37
38
39
40

SFX0172-01
SFQA520-01
SFQA001-02
SFXJ172-05
SFHKO40L
SFUP025-01
RJASVA
SFUP132-03
SFGC122-01
SFUP122-10

41
42
43
44
45
46
47
48
49
50

SF KT122-02
SFKK122-03
SFUZ122-01

51
52
53
54
55 IM]
65 [MCI
56
57
58

'

F

1

SFUP122-01
SFDJ122-01E
SFUP122-13
SFAU122-01
SFUP122-05
SFUP122-04
SFUM170-07
SFGC122-02E
SFUP122-06
SFKTO15-02E
SFNN122M01
SFNN122COI
SFX0122-01
SFX0122-02
SFAT122-01A

TONE ARM and ARM BASE
SFPCC31001 K
SFPAM18201 K
SFPWG17201K
SFPRT18201K
SFPZB17202
SFQA829-03
SFPAB13202
SFPJL18202K
SFPZB12203
SFUM170-06
SFPZB12204
SFPAB18201 K
SFPZB12201 K

61
62
63
64
65
66
67
68
70
71
72
73
74

75 [M]
75 (MC)
76
77
78
79
80
81

-

SFAD122-01A
SFTG172-01
SFTE172-01Z
SFUM172-05
SFMGQ20401
SFMG520-31A
SFMZ172-01E
SFMZQ20-01A
SFUP122-12
SFAC122-01

-

Ref . No .

-

"

Head Shell
Tone Arm Ass'y
Balance Weight Ass'y
Lift Assy
Knob, Arm Base Lock
Spring, Lift Ass'y
Knob, Arm Lift
Oil Damper
Plate, Arm Base Cover
Spacer, Phono Cord
Clamper, Phono Cord
Tone Arm Fixing Plate Ass'y
Plate, Position Fix

Phono Cord
Phono Cord
GroundWire
Arm Rest
Arm Base
Ring,
ng, Arm Base Operation
Bracket, Arm Base
Knob, Anti-skate Force Control

XTN3+88FZ
-FXGQ20-02
XTN3+88
XTN26+88
XTN4+10B
XWA48
XUC3FT
XUC2FT
XUC25FT
SFXW910J02

Screw
Screw
Screw
Screw
Screw
Washer
Circlip
Circlip
Circlip
Washer

XTN3+408FZ
XSN3+10BVS
XWE3F12FZ
XTN3+25BFZ
SFXW122-01
XWE3E10
SFPEW1100
SFPEW11003
XSN3+BS
SFXG132-01

Screw
Screw
Washer
Screw
Washer
Washer
Washer
Washer
Screw
Screw

0
0

XTV3+BBFN
XTN3+108
XTN2+108
XSN17+3FY
XSN3+149
SFXW172-04
XUB14FT
SFUZ172-05
XTN3+6B
XSN3+8S
XWA3BFZ
XWA38
XWG3
SFXG829-1
XUCSFT
XTW3+SB
XTV3+88FN
XWE4A10EW

Screw
Screw
Screw
Screw
Screw
Washer
Circlip
O Ring
Screw
Screw
Washer
Washer
Washer
Screw
Circlip
Screw
Screw
Washer

0
0
0
0
0

XTN3+258
XYN3+C6FZS
XSN3+128VS
SFPEW17201
XWG26

Screw
Screw
Screw
Washer
Washer

ACCESSORIES A1 [MI
A1 [MCI
A2
A3
A4
A5
A6
A7
A8

SFNU122MOl
SFNU122C01'
SFWE010
SFPEN3302
SFPEW9601
SFCZV8801
SFPEV9801
SFK0135-01
SFPZB3501

Instruction Book
Instruction Book
Adaptor, 45 r .p.m .
Nut, Cartridge
Washer, Cartridge
Screw, Cartridge
Screw, Cartridge
Overhang Gauge
Shell Weight

P1 [M]
P1 [MCI
P2
P3
P4
P5
P6
P7

SFHP122MOl
SFHP122COl
SFHH122-01
SFHH122-02
SFHD122-01
SFHD122-02
SFHD122-03
SFYH60X60

P8

SFYH40X45

Carton
Carton
Pad, Front
Pad, Rear
Pad, Top
Pad, (A), Turntable
Pad, (B), Turntable
Polyethylene Cover, Turntable Unit and
Dust Cover
Polyehtylene Cover, Turntable

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
00
0
0
0

-

Knob, Pitch Control Volume
Ornament, Pitch Control Volume
Shading Cloth, Pitch Control Volume
Hqlder, LED
- Bucket, Pitch Control Volume
Connector, 4-PIN
Supporter, Bottom Base
Base, Bottom
Supporter (A), Hinge
Supporter (B), Hinge
Case, Hinge
Audio Insulator
Supporter (C), Hinge
Knob, Speed Selector (45 r.p .m)
Name Plate
Name Plate
Pipe (A)
Pipe (B)
Hinge Ass'y

SFDH360MOl
SFDH028-01
SFP
1 720
SFPKDKD1720
SFPKB 1 7201S
SF P
12201
SFPAB 17206

Part Name & Description

SCREWS, WASHERS and CIRCLIPS

Spring, Switch Cam
Cam, Switch
Spacer, LED
Cover, Lamp
Boss, Drive
Spring, Drive Boss
Pin, Lock Canceler
Bracket, Stylus-illuminator
Plate, .Lock Operation
Connector, 3-PIN
Pin, Guide
Spring, Lock Canceler Pin
Spring, Lock Operating Plate M'tg
Pin, Lock Operating Plate M'tg
Clamper; AC Cord
Bracket, AC Cord
AC Cord
Bracket, Power Transformer
Cushion, Power Transformer
Spacer, Power Transformer

Part No .

-

PACKINGS

EXPLODED VIEWS

20

Printed in Japan



---

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