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SERVICE (cont.)
FIG. 57 TRANSFORMER TERMINALS
P1647
TRANSFORMER (all Models)
FIG. 56 TRANSFORMER
P1646
Location:
The transformer is located behind the lower
front access cover, mounted on the right rear side of
the component bracket.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. Disconnect the four pin plug from the main harness
from the four pin connector on the transformer.
3 Check the voltage across black wire (pin 1) and
the
white wire (pin 2) on the plug from the main har-
ness. Connect the dispenser to power source. The
indication must be:
a) 120 volts ac for two wire 120 volt models.
b) 120 volts for three wire 120/208 and 120/240
volt models.
c) 240 volts ac for two wire 240 volt models.
d) 230 volts ac for two wire 230 volt models.
4. Disconnect the dispenser from the power source.
If voltage is present as described reconnect the plug
and the connector and proceed to #5.
If voltage is not present as described, refer to the wiring
diagrams and check the main wiring harness.
5. Check the voltage between J1-1 and J1-2 on the
eight pin connector at the control board. Connect
the dispenser 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. Loosen the two #8-32 screws securing the com-
ponent bracket to the dispenser housing base.
2. Pull component bracket out the front of the dispenser
far enough so the transformer connector can be
disconnected from the main wiring harness.
3 Disconnect the transformer four pin connector from
the four pin plug on the main wiring harness.
4. Remove the two #6-32 keps nuts securing the trans-
former to the rear of the component bracket.
5. Remove and discard the transformer.
6. Install new transformer on the rear of the component
bracket and secure with two #6-32 keps nuts.
7. Connect the four pin connector on the transformer
to four pin plug on the main wiring harness.
8. Place the component bracket into position and
tighten the two #8-32 screws.
FMD DBC-3 shown
42672 122209