Bunn JDF-4SB Manual De Usuario

25

FIG. 23 CONTROL BOARD

P3250.25

Location:

 

The Main Control Board is located on the electrical 

component enclosure behind the splash panel.

Test Procedure:

Power Supply Circuitry:

1.  Disconnect the dispenser from the power source.

2.  With a voltmeter, back probe check the voltage 

across pins 1 & 3 of  the J6 connector on the wir-

ing harness. Connect the dispenser to the power 

source. The indication must be 24 volts ac.

3.  Disconnect the dispenser from the power source.

If voltage is present as described, proceed to step 4.

If voltage is not present as described, refer to the Wiring 

Diagrams and check the dispenser wiring harness back 

to the transformer (See TRANSFORMER).

4.  Disconnect the dispenser from the power source.

5.  With a voltmeter, back probe check the voltage 

across pins 1 & 3 of  the J12 connector on the 

wiring harness. Connect the dispenser to the power 

source. The indication must be 24 volts ac.

6.  Disconnect the dispenser from the power source.

If voltage is not present as described, refer to the Wiring 

Diagrams and check the dispenser wiring harness back 

to the transformer (See TRANSFORMER).

Removal and Replacement:

1.  Remove the four #6-32 screws securing the control 

board to the component bracket.

2.  Disconnect all the plugs on the main wiring harness 

from the connectors on the control board.

3.  Remove the spacers from the control board and 

discard.

4.  Install the spacers on to the new control board

5.  Reconnect all plugs on the main harness to the 

connectors on the control board.

6.   Install new control board on the component bracket 

using four #6-32 screws.

NOTE: Verify all ground wires are connected to the 

grounding stud and secured with nuts.

FIG. 24 CONTROL BOARD CONNECTORS

JDF-2S

JDF-4S

49179  110613