Technics SL-1200MK2 Service Manual

SL-1200MK2
CONTENTS
DISASSEMBLY PROCEDURE . . . . . . . . . . . . . . . . . . . . . . . . . 2,3
PARTS IDENTIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . .

3
ARM BASE ASSEMBLING PROCEDURE . . . . . . . . . . . . . . . . .

4
FEATURES
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6
SCHEMATIC DIAGRAM
. . . . . .
.
. . .
. . . . . . .
. . . . . . . .
. . .
7,8
REPLACEMENT PARTS LIST (Electrical)
. . . . . . . . . . . . . . . .

9
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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
. . . . . . . . . . . . . . . . . . . . . . . . 11,12
ADJUSTMENT (Electrical) . . . . . . . . . .
. . . . . . . . . . . . . . . .
13
REFERENCE VOLTAGE AND WAVEFORM AT EACH
IC
PIN . . . . . . . . . .
.
. . .
.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 13,14
BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,16
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17,18
REPLACEMENT PARTS LIST (Mechanical) . . . . . . . . . . . . .

19
EXPLODED VIEWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20

Technics SL-1200MK2 Specifications

General

Product color	Silver
Power requirements	AC120V, 60Hz
Signal-to-Noise Ratio (SNR)	78 dB
Power consumption (typical)	14 W

Weight and Dimensions

Depth	360 mm
Width	453 mm
Height	160 mm
Weight	12000 g