Bunn 2SH - Manual (Page 7)

Page 7
SERVICE (cont.)
TRANSFORMER
FIG. 8 TRANSFORMER
Location:
The transformer(s) is located in the stand housing
on the base plate.
Test Procedures:
1. Disconnect the stand from the power source.
2. Disconnect the black wire from terminal #5 and the
white or red wire from terminal # 6.
3. Check the voltage across the black and white or red
wire with a voltmeter. Connect the stand to the
power supply. The indication must be:
a.) 120 volts ac for two wire 120 volt models.
b.) 200 to 240 volts ac for two wire 200 or 240 volt
models.
4. Disconnect the stand from the power supply.
If voltage is present as described reconnect the wires
and proceed to #5.
If voltage is not present as described, refer to the
wiring diagrams and check the stand wiring harness.
P1403.40
1 2 3 4
5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
5. Disconnet the blue/black wires from terminals #7
and #12 on the transformer.
6. Check the voltage across terminal #7 and #12 of
the transformer with a voltmeter. Connect the
stand to the power source. The indication must be
24 volts ac.
If voltage is present as described the transformer is
operating properly.
If voltage is not present as described, replace the
transformer.
Removal and Replacement:
1. Disconnect all the wires from the transformer.
2. Remove the four #6-32 screws securing the trans-
former and mounting strap to the stand housing.
3. Remove transformer and discard.
4. Install new transformer in the stand housing se-
curing with four #6-32 screws and mounting strap.
5. Refer to Fig. 9 when reconnecting the wires.
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