Control System 57
Service Manual – SC6500
™
Designation Pin ID
Wire ID/
Color
Description
Signal
Characteristics
Nominal
Value (when
activated)
Reference
To:
Acceptable
Range
Measured Comments
Input J2-3 ORN/BLU
Vacuum Motor
Shunt
Voltage
.10V (Single
Vac)
.20V (Dual
Vac)
B- (ground)
.07 - .12V
(Single Vac.
Motor)
.15 - .24V
(Dual Vac.
Motor)
0.136V Single Vac
Motor running
Recovery Tank Full voltage
= .083V (Single Vacuum
Motor)
Recovery Tank Full voltage =
.166V (Dual Vacuum Motor)
Output J2-4 ORN/BLK Battery - Voltage 0V B- (ground) 0 - 1V 0.04V
Return path for Scrub Deck
Resistor.Vacuum motor
running.
Output J2-5 YEL/GRA
Brush
Actuator -
Voltage 36V B- (ground) see comment
0.4V down
37.1V up
2.9V rest
-36V while lowering,
+36V while raising
Output J2-6 RED/BLK
Brush Actuator
+
Voltage 36V B- (ground) see comment
37.1V down
0.4V up
2.9V rest
+36V while lowering,
-36V while raising
Output J2-7 GRN/ORN
Side Broom
Actuator -
Voltage 36V B- (ground) see comment
36.4V up
0.4V down
2.9V rest
-36V while lowering, +36V
while raising
Output J2-8 GRA/VIO
Side Broom
Actuator +
Voltage 36V B- (ground) see comment
36.8V down
4-1.4V up
2.8V rest
+36V while lowering, -36V
while raising
Output J2-9 BLU/BRN
Squeegee
Actuator -
Voltage 36V B- (ground) see comment
36.8V up
0.5v down
2.9V rest
-36V while lowering, +36V
while raising
Input J2-10
BLK Battery - Voltage 0V B- (ground) 0 - 1V 0.04V Vacuum motor running.
Input J2-14 BLK Battery - Voltage 0V B- (ground) 0 - 1V 0.04V
Output J2-15 BRN/BLK
Side Broom
Contactor
Voltage 0V B- (ground) 0 - 1V
37.2V off
0.1V on
Input J2-16 GRN/WHT
Scrub Deck
Sense Resistor
Voltage
1.78V, 2.5V,
3.0V, 3.57V
B- (ground)
1.78V = 40” Disk
2.50V = 40” Cylindrical
3.0V = 45”/48” Disk
3.57V = 45”/48” Cylindrical
Input J2-17 VIO/YEL
Solution Empty
Switch
Voltage 0V B- (ground) 0 - 1V 2.8v Active when tank is empty
Output J2-18 ORN/BRN
Backup Alarm
(+)
Voltage +15V B- (ground) 14.9V
Output J2-19 BLU/BLK
Speed Control -
Mode Sel 1
Voltage 0 or 36V B- (ground)
18.6V
0.03V
Scrub on, speed increase off
Scrub on, speed increase on
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