Bunn TU3Q-EZ, Operating & Service Manual

Page: 17 / 22

Page 17
SERVICE (cont.)
ON/OFF SWITCH
FIG. 6 ON/OFF SWITCH
P1187.40
Location:
The ON/OFF switch is located in the front of the
hood, above and to the left of the brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. Remove the black and white/violet wires from the
switch terminals.
3. With a voltmeter, check the voltage across the
black wire removed from the ON/OFF switch and
the white wire remaining on the switch terminal.
4. Connect the brewer to the power source. The in-
dication must be 120 volts ac for two wire 120
volt models.
5. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #6.
If voltage is not present as described, refer to the
Wir-
ing Diagrams and check the wiring harness.
6. Check for continuity across the center and end
terminals of the top row when the switch is in the
“ON” position.
If continuity is present as described, replace the wires,
the switch is operating properly.
If continuity is not present as described, replace the
switch.
Removal and Replacement:
1. Remove the wires from the switch terminals.
2. Compress the clips inside the hood and gently
push the switch through the opening.
3. Push the new switch into the opening and spread
the clips to hold the switch captive in the hood.
4. Refer to FIG. 7 when reconnecting the wires.
FIG.7 ON/OFF SWITCH TERMINALS
P1801
BLK to Power Cord
WHI to Power Cord WHI/VIO to
Control Board J1-8
29460 061599