Bunn Coffeemaker CDBC Manual De Usuario

Page 23

TRM2

TRM1

Location:

  The Control Board is located inside the trunk

behind the front access panel.

Test Procedures:

The test procedures for the control board will vary

depending upon the problems experienced by the
brewer. Refer to the Troubleshooting guide beginning
on page 9. The troubleshooting guide is divided into
three sections, Refill Circuit, Heating Circuit, and Brew-
ing Circuit.

P1915

FIG. 3 CONTROL BOARD

Removal and Replacement:
1. Disconnect the black wire and blue wire from the

relay on the control board.

2. Disconnect the 8-pin connector and the 6-pin

connector from the main wiring harness.

3. Disconnect the 2-pin connector from the ready

indicator LED.

4. Remove the four #6-32 screws securing the con-

trol board to the component mounting bracket.

5. Remove the four spacers from the control board

and attach them to the new board.

6. Locate J6 connector on control board. If jumper is

across pins 1 & 2, board is set to operate tea
brewer or a brewer that DOES NOT use a water
level probe. If jumper is across pins 2 & 3, board
is set to operate a coffee brewer or a brewer that
uses a water level probe. Look at the bottom side
of the control board. Pin 1 of connector J6 is
marked by a square solder pad and pins 2,3 & 4 are
round.

7. Check the jumper on the brew temperature lock-

out jack for desired function (enabled or disabled).

8. Check the jumper on the temperature jack for

desired brew temperature. The factory setting
should be 200

°F(95°C)

9. Install a new control board and secure with the

four #6-32 screws to the component mounting
bracket.

10. Connect the 2-pin connector from the ready indi-

cator LED.

11. Connect the 8-pin connector and the 6-pin con-

nector from the main wiring harness.

12. Connect the blue wire and black wire to the relay on

the control board.

13. Refer to 

CEZ-APS/TS/TSR Adjustments and Op-

tional Settings to program the new control board.

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