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SERVICE (cont.)
If voltage is present as described, proceed to step 7.
If voltage is not present as described, refer to the wiring
diagram and check the dispenser wiring harness.
7. While pressing the appropriate switch, check for
continuity across the following pins of the digital
touch control switch assembly’s multi-pin connec-
tor:
Note: Pin 1 of the connector is identified by an arrow
embossed on the connector housing.
FMD DBC-3:
Left Small : pin 1 to pin 2
Left Medium: pin 2 to pin 3
Left Large: pin 1 to pin 3
Stop: pin 1 to pin 4
Center Small: pin 1 to pin 5
Center Medium: pin 5 to pin 6
Center Large: pin 1 to pin 6
Right Small: pin 1 to pin 7
Right Medium: pin 7 to pin 8
Right Large: pin 1 to pin 8
Hot Water: pin 1 to pin 13
FMD DBC-2FD:
Left Small : pin 1 to pin 2
Left Medium: pin 2 to pin 3
Left Large: pin 1 to pin 3
Stop: pin 1 to pin 4
Right Small: pin 1 to pin 5
Right Medium: pin 5 to pin 6
Right Large: pin 1 to pin 6
Hot Water: pin 1 to pin 7
If continuity is present as described, the membrane
switch assembly is operating properly.
If continuity is not present as described, replace the
membrane switch assembly.
P1631
Location:
The digital touch control switch is located on the lower
outside of the dispenser door.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Open dispenser door and remove the bottom door
cover.
3. Disconnect the wires from the door interconnect
wiring harness to the digital touch control switch
assembly.
4. With a voltmeter, and using pin 1 of the multi-pin
connector of the door interconnect wiring harness
as a reference (-), check for voltage at each of the
other pins of the connector. Connect the dispenser
to the power source. The indication must be +5
volts dc.
5. On dispensers with a hot water valve, with a volt-
meter, and using pin 1 of the multi-pin connector
of the door wiring harness as a reference (-), check
for voltage at pin 13 (blue/red wire). Connect the
dispenser to the power source. The indication must
be approximately 37 volts dc.
6. Disconnect the dispenser from the power source.
FIG.18 DIGITAL TOUCH CONTROL SWITCH
DIGITAL TOUCH CONTROL SWITCH (FMD DBC-2,DBC-3)
FMD DBC-3 shown
42672 122209