Bunn JDF Silver Series, Technical Training Manual

Bunn-O-Matic Corporation

13

Accessing the Inside of the Machine

The majority of service work done to a JDF-S will require the service technician to access the inside of the unit. The 

unit has four removable panels to facilitate access- the top panel, the two side panels, and front splash panel. De-

pending on the repair the technician may have to remove one or all of these panels. 

In order to work safely the power should be disconnect-

ed prior to removal of any body panel. Once the panels 

are removed the power can be reconnected in order to 

troubleshoot the machine.

Top Panel

The top panel is secured with 4 small flat head screws. 

To the remove the panel, remove the four screws, lift 

the panel up and away from the dispenser’s body.

Side Panels

Each side panel is secured with 4 small flat head 

screws. Once the screws have been removed pull the 

side panel away from the dispenser.

Front Splash Panel

This panel can be removed by first removing the drip 

tray to gain access to the two screws securing the 

splash panel in place. Remove the 2 flat head screws 

then slide the splash panel down the pull away from the 

dispenser.

Removing the Door Cover

The door cover may be removed if you need to gain access to the lighting 

circuit, switches, switch board or membrane switches.

Step 1:

 Disconnect unit from power source.

Step 2:

 Remove the 5 screws securing the door cover to the door assembly.

Step 3:

 If unit uses a membrane switch disconnect the 6 pin connectors from 

auxiliary switch board. If the unit uses mechanical switches disconnect at the 

harness molex pin connector.

Step 4:

 Set door cover aside.

Machine Function and Operations

Electronic Group

Step Down Transformers (A and B)

The top step down transformer connects to J-12 connector, marked 

“Right Power” on control board. The transformer is responsible for 

operating dispense stations 3 and 4 known as right middle and 

right dispense stations.

The bottom step down transformer connects to the J-6 connector, 

marked “Power” on the control board. The transformer is responsi-

ble for the main power for the control board, machine and dispense 

stations 1 and 2 known as left and left middle.

A

B

C

D

E

F

H

G

I

Top Lid

Rear Panel

Ambient

Product Line

Entry

Air Filter

Right Panel

Lower

Splash Panel

Left Panel

Drip Tray & Grate

Refrigeration

Charge Decal

Serial Number &

Data Plate

Bezel Retainer

Door Cover

Flavor Label

Holder

Bezel

Portion Control

Switch Membrane