Membrane Switch - Bunn Ultra NX Service & Repair Manual

Membrane Switch

FIG. 3 MEMBRANE SWITCH
Location:
The membrane switch is located on the front panel.
Front Panel Removal:
1. Remove the drip tray.
2. Loosen 2 screws on the underside of each side
panel. Lower the side panel while gently pulling
outward to remove panel.
3. Locate the single screw on the left and right
side securing the front panel to the frame.
4. Lower front of the machine, remove 1 screw
from underside the front panel.
5. The membrane switch will need to be discon-
nected before full removal of front panel. Gently
lower front panel and rest on the counter and
disconnect membrane switch from the wiring
harness.
Test Procedures:
1. Enter the software program and scroll to main
"Service Tools" menu.
2. Press the "Right Dot" switch to answer "Yes".
3. Press the "Center Dot" switch to scroll through
the menus until "Test Switches" menu is dis-
played.
NOTE: The Test Switches menu will allow the
operator or technician to test the operation of
the individual switches on the membrane pad.
4. Press each individual switch to see if the input
is recognized by the switch by displaying the
switch name.
SERVICE - FRONT PANEL COMPONENTS
If the input is not recognized by pressing a
switch on the membrane pad, replace
membrane switch.
Membrane Switch Diagram:
NOTE: #7 - Common to all the buttons.
#7 - #1 (shield) no continuity
#7 - #2 (Left Auger)
#7 - #3 (I/O)
#7 - #4 (not used)
#7 - #5 (Left ICE/CHILL/OFF)
#7 - #6 (LEFT DOT)
#7 - #8 (CENTER DOT)
#7 - #9 (not used)
#7 - #10 (RIGHT DOT)
#7 - #11 (Right Auger)
#7 - #12 (Right ICE/CHILL/OFF)
I/O
LEFT
FIG. 4 MEMBRANE SWITCH
I
O
FIG. 5 MEMBRANE SWITCH and RIBBON CABLE
29
MEMBRANE
SWITCH
12
1
SHIELD
RIGHT
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