On/Off Switch - Bunn TB3 Operating & Service Manual

SERVICE (cont.)

ON/OFF SWITCH

FIG. 16 ON/OFF SWITCH
Location:
The ON/OFF switch is located in the front of the
hood, above and to the left of the brew funnel.
Test Procedure:
Brewers W/Out Half Batch Option
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
indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 230 volts ac for two wire 230 volt models.
c) 100 volts ac for two wire 100 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. 17 when reconnecting the wires.
WHI/VIO to Dilution
Timer
WHI/VIO
WHI/VIO to Brew
P3034
Timer TL1
FIG.17 ON/OFF SWITCH TERMINALS
Page 24
BLK to Power Cord (100V &
120V Models
BLK to Power Connector
(230V Models)
WHI to Dilution Timer TL2
(100V & 120V Models)
RED to Dilution Timer (230V
Models)
P1282
37235 050205