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CONTENTS
1.
GENERAL
•
•••••;
•• ^
1-1.
Features • • • . 1
2. OPERATION 3
2-1.
Name
ofpart 3
2-2. Test run ^
2-3.
SC-20
Powerindicatorbox ^
2-4.
SC-120
Control
panel
^
2-5.
SC-220
Control
panel
®
2-6. SC-320 Control panel 12
3.
ADJUSTMENT
21
3-1.
Belt
tension
21
3-2. Prevention motor vibration (for N company'smotor) 21
3-3. Checkingand correcting the rotational direction of sewingmachine 21
3-4.
Pedal
22
3-5. Maximum sewing speed 25
3-6.
Auto-lifter
27
3-7. Howto
reduce
the handlightfrom
flickering
(for
single
phaseonly) 28
4.
FUNCTIONS
29
4-1. Power supply voltage 29
4-2.
Functions
selection
switches
30
4-3. Increase
of
control panel functions 44
44.
Safety circuit 46
4-5. Connectors for standing work 48
4-6. Production control system and needle-upstop switch functions 50
5.
MAINTENANCE
AND
INSPECTION
51
5-1. Howto replacethe sensorpotentiometer set 51
5-2.
Memory
battery
charging
monitor LED
(SC-320
only) 53
5-3.
Motor
malfunction
detector
LED
53
54.
Solenoid
monitor
LED
54
5-5. How
to
replace each circuit board 55
5-6. Troubleshooting 64
5-7. Circuit board installment diagrams 75
5-8. Connector connection diagrams 80
5-9. Type
of
rating plates for SCseries
of
the PSC unit 81
5-10. Block diagrams 82
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