The voltage value and waveforms are the reference voltage of this measured by DC electronic voltmeter (high impedance)
and oscilloscope on the basis of chasssis.
Accordingly, there may arise some errors in the voltage values and waveforms depending upon the internal impedance of the
tester or the measuring unit.
Important safety notice:
Components identified by
use only manufacture’s specified parts.
NO MARK: Voltage when at a stop
( ) : Voltage during rotation
•S201 :
•S202 :
•S203 :
•S301 :
•S302 :
•S401 :
•S601 :
•VR201 :
•VR301 :
•VR302 :
•VR303 :
SPEED SELECTOR (33 rpm) switch.
SPEED SELECTOR (45 rpm) switch.
START/STOP switch.
PITCH CONTROL RESET switch in “OFF” position. (Interlocked with VR303)
PITCH RESET switch in “OFF” position.
STYLUS ILLUMINATOR switch in “ON” position.
POWER switch in “ON” position.
BRAKE ADJUSTMENT VR.
PITCH CONTROL ± 0% ADJUSTMENT VR.
PITCH CONTROL GAIN ADJUSTMENT VR.
PITCH CONTROL ADJUSTMENT VR. (Interlocked wwith S301)
!
mark have special characteristics important for safety. When replacing any of these components,
: +B Line
Type Illustration of IC’s, Transistors and Diodes
. 17 .
Page 2
SL-1200M3D
. 18 .
Page 3
SL-1200M3D
. 19 .
Page 4
SL-1200M3D
Printed Circuit Boards
. 20 .
Page 5
SL-1200M3D
. 21 .
Page 6
SL-1200M3D
. 22 .
Page 7
Measurements and Adjustments
Notes:
• 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 r.p.m.
• Instruments to be used
1.Tester
2.Frequency counter
SL-1200M3D
Adjustment
2
Pitch control ± 0%
adjustment
Pitch control gain
adjustment
Brake adjustment
1
3
Connection
Frequency counter
(+) … TP27
(–) … Earth point
Tester
(+) … CN102 terminal
(–) … CN102 terminal
Parts
adjusted
VR301
(Fig. 1)
VR302
(Fig. 2)
VR201
(Fig. 1)
Alignment Points
Please refer to Printed Circuit Board Diagram for test point locations.
Procedure
1. Connect the frequency counter and turn the power supply ON.
2. Set the pitch control knob to “0”.
(Indicator lights up.)
3. Adjust VR301 so that the frequency is 262.08 kHz ± 0.05 kHz.
1. Set the pitch control knob to “0”.
2. Pull out the connector CN102 of drive P.C.B.
3. Connect the tester to terminals, and of connector CN102
on the pitch control P.C.B. side.
4. Adjust VR302 so that the resistance value of the tester is
2.875 ± 0.25 kΩ.
1. Adjust VR201 so that the rotation at 33 r.p.m. stops within
the angle of 30° ~ 210° after depressing the stop position.
. 23 .
Page 8
SL-1200M3D
Block Diagram
. 24 .
Page 9
Wiring Connection Diagram
SL-1200M3D
. 25 .
Page 10
SL-1200M3D
Replacement Parts List
Notes: *
Important safety notice:
Components identified by mark have special
!
characteristics important for safety.
Furthermore, special parts which have purposes of fireretardant (resistors), high-quality sound (capacitors),
low-noise (resistors), etc. are used.
When replacing any of components,be sure to use only
manufacture’s specified parts shown in the parts list.
All parts are supplied by MESA.
*
The “<IA> <IB>” maarks in Remarks indicate language
*
of operating instructions.
<IA> : English
<IB> : Canadian French
DUST COVER
T/T RUBBER MAT
TURNTABLE ASS’Y
PANEL COVER
DRIVE COIL COVER
DRIVE COIL ASS’Y
FG COIL ASS’Y
SHAFT ASS’Y
POWER SW KNOB ASS’Y
BUTTON,START/STOP
BUTTON,SPEED SELECTOR(33)
BUTTON,SPEED SELECTOR(45)
WIRE ASS’Y
WIRE ASS’Y
COVER,STROBE ILLUMINATOR
SPRING
BASE,OPERATION
CAM,POWER SWITCH
SPACER,LED
BALL
SPRING
COVER,STYLUS ILLUMINATOR
DRIVE BOSS
SPRING
PIN,LOCK CANCELER
SPRING
PIN,GUIDE
BRACKET,ILLUMINATOR
PLATE,LOCK OPERATION
SPRING
PIN
RUBBER,DUST COVER
HOLDER,LED
BRACKET,PITCH CONTROL
WIRE ASS’Y
STOPPER,SPRING
CABINET
ORNAMENT,ILLUMINATOR
AC CORD ASS’Y
KNOB,PITCH CONTROL
ORNAMENT,PITCH CONTROL
FELT
RUBBER
BOTTOM COVER B
BOTTOM COVER A
NAME PLATE
NAME PLATE
SUPPORTER(A)
INSULATOR
ARM REST
ARM BASE ASS’Y
BRACKET,ARM BASE
KNOB,ANTI-SKATING CONTROL
HEAD SHELL
WIRE KIT
TONEARM ASS’Y
BALANCE WEIGHT
ARM LIFT
SPRING
PACKING CASE
CUSHION,FRONT
CUSHION,REAR
PAD,TOP
PAD(A)
PAD(B)
PROTECTION SHEET
PROTECTION SHEET
PROTECTION BAG
PROTECTION BAG
PROTECTION BAG
PROTECTION BAG
POLYETHYLENE COVER
PAD,TONEARM
SPRING
COVER,STYLUS ILLUMINATOR
DRIVE BOSS
SPRING
PIN,LOCK CANCELER
SPRING
PIN,GUIDE
BRACKET,ILLUMINATOR
PLATE,LOCK OPERATION
SPRING
PIN
RUBBER,DUST COVER
HOLDER,LED
BRACKET,PITCH CONTROL
WIRE ASS’Y
STOPPER,SPRING
CABINET
ORNAMENT,ILLUMINATOR
AC CORD ASS’Y
KNOB,PITCH CONTROL
ORNAMENT,PITCH CONTROL
FELT
RUBBER
BOTTOM COVER B
BOTTOM COVER A
NAME PLATE for U.S.A.
NAME PLATE for Canada.
SUPPORTER(A)
INSULATOR
ARM REST
ARM BASE ASS’Y
BRACKET,ARM BASE
KNOB,ANTI-SKATING CONTROL
HEAD SHELL
PACKING CASE
CUSHION,FRONT
CUSHION,REAR
PAD,TOP
PAD(A)
PAD(B)
PROTECTION SHEET
PROTECTION SHEET
PROTECTION BAG
PROTECTION BAG
PROTECTION BAG
PROTECTION BAG
POLYETHYLENE COVER
PAD,TONEARM
1
1
1
1
1
1
1
1
2
1
2
2
1
1
Printed in Japan
. 30 .
K990301850YH/AM
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