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Re-assembly is done in the reverse order. Note: Ensure
that the common-marked side of water Solenoid is con-
nected to line coming from Plumbing Module.
SCALER/MOTOR TOGGLE SWITCH (PN 875041):
Remove Toggle Switch 10-pin cable connector from
Power/Display Board (see Fig. 12). Remove the red and
black wires coming from Three-Way Solenoid. Remove
the two brown wires coming from Scaler. Locate and
cut the violet and black wires from Toggle Switch.
Remove Switch with 3/16" box-end wrench.
Reassemble in the reverse order. Place red wire from
Three-Way Solenoid into pin 7 of cable connector.
Place brown wire with fuse from the Scaler into pin 8.
Place black wire from Solenoid into pin 9 and remain-
ing brown wire from Scaler into pin 10. Ensure that the
wires are secure in cable connector. Solder and heat
shrink violet and black wires back together. Reinstall
cable connector into Power/Display Board.
SCALER TUBE AND HANDPIECE (PN 730500):
Remove Scaler Tube from fitting on Scaler Coolant
Adjustment Valve (see Fig. 13). Cut black and white
wire coming from Tube. Remove cable tie and binding
string. Pull Tube out thru chassis hole.
Reassemble in the reverse order. After Tube has been
inserted thru chassis hole, install cable tie around Tube
just above the grommet in chassis and tie off binding
string around Scaler Coolant Adjustment Valve. Trim
Tube and wires to fit. Re-attach Tube to fitting on
Adjustment Valve, and solder and heat shrink the wires.
Fill Tube with RTV to prevent pull out.
SCALER POTENTIOMETER (PN 810164):
Make a sketch of the Potentiometer orientation and
wiring going to the cable connector in Scaler Assembly
(see Fig. 13). De-solder orange, red and brown wires
coming from Scaler to Potentiometer. Remove
Potentiometer with a ½" box-end wrench.
Reassemble in the reverse order. Trim tab off
Potentiometer prior to reinstalling. Re-solder and heat
shrink wires according to sketch. Also refer to electrical
schematics.
SCALER MODULE (PN 730500):
Disconnect the wires from Power Receptacle to Power
Switch (see Fig. 14). Disconnect cable connectors from
Secondary Fuses to the Power/Display Board. Slide
cover back from Scaler and remove connector. Remove
nuts and washers holding down the Scaler plate with
5/16" socket. Turn plate upside down and remove screws
with #1 Phillips head screwdriver. Remove the module.
Reassembly is done in the reverse order.
Figure 12
Scaler
Assy
Figure 13
Scaler
Potentio-
meter
Black
&
White
Wires
Cable
Tie
Scaler Assy
Scaler
Coolant
Adjustment
Valve
Scaler
Tube
Scaler
Binding
String
Figure
Secondary
Fuse (x2)
Secondary
Fuses
Cable
Connectors
Scaler Mtg
Hdwre
Power
Receptacle
Scaler
Assembly
w/Plate
Power
Switch
Scaler/
Motor
Toggle
Switch
Violet
Wire
Toggle
Switch
10-Pin Cable
Connector
Black
Wire
Brown
Wires
Three-Way
Solenoid