Cold Water Membrane Switch - Bunn Silver Series Service & Repair Manual

SERVICE (CONT.)
Cold Water Membrane Switch (without Bezel)
FIG.47 MEMBRANE SWITCHES
Location:
The membrane switches are located on the lower
outside of a standard, 4 lens or graphic door cover.
Each membrane switch connects to a PH or PC switch
board (CBA) located on the inner door panel. Switches
are connected in logical order from left to right on the
switch board (CBA).
Test Procedures: Continuity Check
1. Disconnect the dispenser from the power source.
2. Remove the 5 outter screws securing the door
cover.
3. Carefully remove door cover and disconnect all
membrane switches from switch board (CBA).
4. Locate ribbon connector (membrane switch) being
checked. Install red meter lead on the input or sta-
tion terminal being checked and install black meter
lead on common terminal number 1.
Depress the station button, meter should show
continuity 0.00 on display or here audible tone and
return back to an open connection when depression
is released from switch.
No continuity as described, replace membrane
switch.
#1 Common
#2 Cold Water
Removal and Replacement:
1. Disconnect the dispenser from the power source.
2. Remove the 5 outter screws securing the door
cover.
4. Disconnect the membrane switch connector from
the switch board.
5. Carefully peel the membrane switch from the front
of the door cover.
6. Remove any excess adhesive from the surface.
7. Remove the backing from the new membrane switch.
8. Feed the membrane switch ribbon through the
openning and apply the new membrane switch to
the door surface.
9. Connect the switch ribbon connector to the switch
board. Note: Ensure that you are not a pin off in
either direction.
1
WATER
COLD WATER DISPENSE
FIG. 48 MEMBRANE SWITCH
39
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