Panasonic SL-1200MK2 Service Manual - Page 13

SL-1200MK2, SL-12 - a

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SL-1200MK2 SL-12 ADJUSTMENT (Electrical) Adjustments (Electrical) (D 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 Adjustment Connection Points Adjustment Point Adjustment Method Adjustment of pitch A 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. O Adjustment B of pitch control gain Tester TP31 and TP32 VR302 Adjust VR302 for 2.7 k92 t0.1 of resistance value OO Braking C adjustment - (BRAKE) VR201 Adjust VR201 for complete stop within 120° - 270° after stop signal initiated. (Turntable becomes free a few seconds after stop) STOP SIGNAL 2700 Turntable &1 0 REFERENCE VOLTAGE AND WAVEFORM AT EACH IC PIN IC101 (AN6675) Start Stop Start Stop Start Stop 2V © 2V ~3 0v 2V (04""W 2V,~, , .. © ov = 15V ® Same as at right 1"" ,uV O sv sV q Os sV sv 0 © © 5V ('S 6 .6V S 15V 15V ~T 20V 20V ao .6 20V 20V 10 .1 OO oV ov © 15V 15V (S , f © 20V 20V o .l, Q2 08 5V 5V -00 209. , ® 0 .2v 0.2V , t r 15v ' ov T ov © 1 .7V 1 .7V *40"1 © 15V ,.,_ 15V C © 15V 15V

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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
AT EACH
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