SERVICE (CONT.)

Dispense Membrane Switch (all Models)

WATER

COLD

FIG.45 MEMBRANE SWITCHES

Location:

The dispense buttons are located on the lower outside of the dispenser door and actuate switches on the dispense switch board located on the inside of the door.

Test Procedures:

NOTE: Before continuing, check that the ribbon cable is properly connected to the control board and not a pin off in either direction.

1.Disconnect the dispenser from the power source.

2.Remove the rear panel and disconnect ribbon cable.

3.Check for continuity of the switches using pin #1as common.

#1 Common #2 ON/STOP #3 Large #4 Medium #5 Small

If continuity is not present when the appropriate switch is pressed, the Membrane Switch must be replaced. If continuity is present, chech the short harness going to J6 on the Control Board.

Removal and Replacement:

1.Disconnect the dispenser from the power source.

2.Open the dispenser door.

3.Remove the four #8-32 screws securing the lower door panel and remove the panel.

4.Disconnect the six pin harness from the switch board.

5.Carefully peel the membrane switch from the front of the switch bezel.

6.Remove any excess adhesive from the bezel sur- face.

7.Remove the backing from the new membrane switch.

8.Feed the membrane switch harness through the openning and apply the new membrane switch to the switch bezel.

9.Connect the switch harness to the control board.

1

PORTION CONTROL

FIG. 46 MEMBRANE SWITCH

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Bunn JDF-4SB, JDF-4D manual Dispense Membrane Switch all Models, Location

JDF-4D, JDF-4SB, JDF-4S specifications

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