Bunn TB3 Guida Utente
Page 25
FIG.19 UNSWEET/OFF/SWEET
SWITCH TERMINALS
P1763
37235 050205
SERVICE (cont.)
UNSWEET/OFF/SWEET SWITCH (Sweetner Option)
FIG. 18 UNSWEET/OFF/SWEET SWITCH
P3034
Location:
The UNSWEET/OFF/SWEET switch is located in
the front of the hood, above and to the left of the
brew funnel.
brew funnel.
Test Procedure:
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the
1. Disconnect the brewer from the power source.
2. With a voltmeter, check the voltage across the
black wire and white wire on the selector switch.
3. 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.
4. Disconnect the brewer from the power source.
If voltage is present as described, proceed to #5.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
If voltage is not present as described, refer to the Wir-
ing Diagrams and check the wiring harness.
5. Disconnect the black and white wires from the
center terminals.
6. Disconnect the brown/white and white/violet wires
from the right side terminals.
7. Check for continuity across the center and right
terminals in rows one through four when the
switch is in the "SWEET” position.
switch is in the "SWEET” position.
If continuity is present as described, replace the wires
on the right side and proceed to #8.
If continuity is not present as described, replace the
switch.
on the right side and proceed to #8.
If continuity is not present as described, replace the
switch.
8. Disconnect the white/violet wires on the left side
terminal.
9. Check for continuity across the center and left
side terminals in rows one through four when the
switch is in the "UNSWEET” position.
switch is in the "UNSWEET” 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.
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
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. 19 when reconnecting the wires.
BLK to Power Cord
BRN/WHI to
Sweetener Sol
Sweetener Sol
WHT/GRN to
Brew Sol
Brew Sol
WHT/VIO
to Brew
Timer TL1
to Brew
Timer TL1
WHT to Power Cord