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Technics SL-1200MK2 Service Manual

Technics SL-1200MK2
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ADJUSTMENT
(Electrical)
Adjustments
(Electrical)
Notes
:
9
Make
the
following
adjustments
after
replacing
parts
such
as
IC's,
transistors,
diodes,
etc
.
Condition
of
the
set
.
1
.
Power
switch
.
. .
. .
. .
. . . . .
.
ON
2
.
Pitch control
.
. .
. . .
. .
. . . .
.
Center
position
3
.
Speed
selector
switch
. . .
. . .
.
33-1/3
r
.p
.m
.
Instruments
to
be
used
1
.
Tester
2
.
Frequency
counter
REFERENCE
VOLTAGE
AND
WAVEFORM
ATEACH
IC
PIN
IC101
(AN6675)
SL-1200MK2
SL-12
Q2
C
(D
O
OO
Adjustment Connection
Points
Adjustment
Point
Adjustment
Method
Adjustment
of
pitch
Frequency
counter
1
.
Pitch
control
switch
to center position
.
A
control
t0%
(2)
-
.
TP27
VR301
2
.
Adjust
VR301
for
262
.08
kHz
10
.05
kHz
of
(PITCH)
0
-
GROUND
frequency
.
Adjustment
Tester
B
of
pitch
TP31
and
VR302
Adjust
VR302
for
2
.7
k92
t0
.1
of
resistance
control
gain
TP32
value
Braking
Adjust
VR201
for
complete
stop
within
120
°
-
270°
C
adjustment
-
VR201
after
stop
signal
initiated
.
(Turntable
becomes
free
a
(BRAKE)
few
seconds
after stop)
STOP
SIGNAL
2700
&1
Turntable
0
Start
Stop
Start
Stop
Start
Stop
2V
2V
(
04""W
©
2V
2V,~,
,
.
.
©
=
15V
1
""
~3
0v
ov
®
Same
as at
right
,uV
O
sv
sV
q
Os
sV
sv
0
©
15V
15V
20V
20V
ao
.6
©
5V
(
'S
6.6V
S
~
T
20V
20V
10
.1
OO
oV
ov
©
15V
15V
(S
,
f
©
20V 20V
o
.l,
08
5V 5V
-
0
0
209.
,
®
0.2v 0.2V
,
t
15v
'
T
©
1
.7V
1
.7V
r
ov ov
*4
0
"1
,
.,_
©
15V
15V
©
15V
15V

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Technics SL-1200MK2 Specifications

General IconGeneral
Product colorSilver
Power requirementsAC120V, 60Hz
Signal-to-Noise Ratio (SNR)78 dB
Power consumption (typical)14 W
Weight and Dimensions IconWeight and Dimensions
Depth360 mm
Width453 mm
Height160 mm
Weight12000 g

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