Control System 56
Service Manual – SC6500
™
Designation Pin ID
Wire ID/
Color
Description
Signal
Characteristics
Nominal
Value (when
activated)
Reference
To:
Acceptable
Range
Measured Comments
Input J1-12 YEL/RED
Speed Control -
Direction
Voltage
0V (reverse),
36V (forward)
B- (ground)
0 - 1V
(reverse),
31 - 38V
(forward)
33.4V N or FWD
0.004V REV
Output J1-13 GRA
UI Panel -
Ground
Voltage 0V B- (ground) 0 - 1V 0.04V
Provides ground to User
Interface panel. Vacuum
motor running.
Input J1-14 BLK Battery - Voltage 0V B- (ground) 0 - 1V 0.04V Vacuum motor running.
Input J1-15 VIO Battery + Voltage 36V B- (Ground) 31V - 38V 37.3V
Downstream of circuit
breaker F2, switched through
contactor K5
Output J1-16 WHT/VIO
K3 Center
Brush
Contactor
Voltage 0V B- (ground) 0 - 1V
37.4V Off
0.11V On
Output J1-17 GRA/RED
K4 Left Brush
Contactor
Voltage 0V B- (ground) 0 - 1V
Not measured. Should be
same as J1-16 or J1-19
Output J1-18 YEL/GRN
L1 Solenoid
Valve
Pulsed Voltage 0 or 36V B- (ground) see comment
37.4V off
0.1V on
Line should alternate
between 0V and 36V when
solenoid is activated
Output J1-19 YEL/BLU
K2 Right Brush
Contactor
Voltage 0V B- (ground) 0 - 1V
37.4V off
0.1v on
Output J1-20 BLU/RED Horn (-) Voltage 0V B- (ground) 0 - 1V
37.4V off
0.4V on
Output J1-21 BLU/ORN
Solution Pump
(-)
PWM 0 or -36V
B- (ground)
see comment
below **
37.4V off
32.06V on
Pulsed PWM signal.
Switched ground return for
pump.
Output J1-22 WHT/BRN
UI Panel -
Power Supply
Voltage +8V B- (ground) 7 - 9V 7.98V
Provides power to User
Interface panel
Input J1-23 VIO Battery + Voltage 36V B- (Ground) 31V - 38V 37.4V
Downstream of circuit
breaker F2, switched through
contactor K5
Output J2-1 WHT/GRN
Squeegee
Actuator +
Voltage 36V B- (ground) see comment
36.5V down
0.3V up
2.9V rest
+36V while lowering, -36V
while raising
Input J2-2 BRN
Scrub Brush
Motor Shunt
Voltage .03 - .3V B- (ground) .03 - .3V 0.042V
Measured 48 inch cylindrical
deck no load
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