Control Board (Portion Control Models) - Bunn Silver Series Service & Repair Manual

SERVICE (CONT.)
Portion Control Board (JDF-2S,4S)
FIG. 25 PORTION CONTROL BOARD
Location:
The Portion Control Board is located inside the door
cover mounted on the bracket.
Test Procedure:
1. Disconnect the dispenser from the power source.
2. With a voltmeter, back probe check the voltage
across pins 1 & 5 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 not present as described, refer to the Wiring
Diagrams and check the dispenser wiring harness back
to the transformer (See TRANSFORMER).
J-1 Cold Water Switch
J-2 Left Left Dispense Switch
J-3 Left Middle Dispense Switch
J-4 Right Middle Dispense Switch
J-5 Right Right Dispense Switch
J-6 Main Harness
J-7 N/A
J-8 N/A
J-9 N/A
Removal and Replacement:
1. Remove the five screws securing the door cover to
the door frame.
2. Carefully pull the cover forward and disconnect
all switch harnesses from the connectors on the
control board.
3. Remove the four #6-20 screws securing the control
board to the light panel.
4. Remove the spacers from the control board and
discard the old board.
5. Install the spacers on to the new control board.
6. Install new control board on the light panel using
four #6-20 screws.
7. Position the door cover to the door frame and
reconnect all switch harnesses to the connectors
P4034.25
on the control board.
8. Secure the door cover to the frame with the five
screws previously removed.
J-6
FIG. 26 CONTROL BOARD CONNECTORS
26
J-8
J-5
J-1
J-4
J-3
J-2
J-7
J-9
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