20
Controls and Systems
Model SB25
Step 5
Loosen the main drain assembly. Remove the fluid
fittings from the water valve and cane pump by
pushing the gray collar toward the fitting and pulling
on the tube. Remove the main drain assembly.
Figure 14
Dispense PCB
______________________________
The Dispense PCB is the main communications link
between the Keypad, Water Dispense Unit, Cane
Dispense Unit and the Drive Board. It stores all
recipes and enables USB communications through a
PC or USB stick.
Check the fuse. Visually, the fuse filament should be
continuous and not burnt. Check the continuity with
the multimeter. The fuse should not read “OL” when
measuring ohms.
Note:
Dip switch #6 must be in the ON position for
units equipped with a cane pump.
Figure 15
Disassembly
Step 1
Turn off the power switch and unplug the
power cord.
Step 2
Remove the left side panel.
Step 3
Remove the box cover.
Step 4
Place an anti-static wrist strap around your wrist.
Attach the clip on the other end of the strap to the
ground post.
Step 5
Remove the connectors.
Step 6
Remove the PCB mounting screws and remove the
board.
Keypad
______________________________
The keypad serves as the main control center for all
functions of the unit.
Troubleshooting
If keypad functions do not work properly, check the
connections to the keypad and the Dispense PCB
and for any condensation build-up on wire
connections. Before replacing the keypad, plug in a
new keypad and test the functions.
Replacement
Step 1
Turn off the power switch and unplug the
power cord.
Step 2
Remove the ice hopper and lid. (See page 17.)
Step 3
Remove the Drive Board. (See page 18.)
Step 4
Remove the main drain assembly. (See page 19.)
