Bunn cdbcf 15 用户指南

Page 14

Location:
The Membrane Switch is located on the front face
plate.

Test Procedures:

There are two methods for testing the membrane

switch. The easiest method is to use the built in test
mode. Refer to the Programing Section for Service
Tools/Test Switches. If for some reason you can't get
into the program modes, or brewer won't power up,

FIG. 14-1 MEMBRANE SWITCH

you can test it with an ohmmeter or continuity tester.
Refer to the schematic to trace the appropriate pins.

NOTE: Pin 1 is the static shield & will not provide a
reading to the other pins. There are two commons
in this circuit, pins 9 & 10.
Disconnect brewer from power source before discon-
necting ribbon cable from control board.

Removal and Replacement:
1.    Disconnect the ribbon cable from 10-pin connector
on the control board.
2.  Gently peel the membrane switch from the front
face plate assembly.
4  Remove any adhesive that remains on the front
face plate.
5.  Remove the adhesive backing from the new mem-
brane switch. Insert the ribbon cable through the slot
in the front face plate and apply the membrane switch
to the front face plate.
6.  Connect the ribbon cable to the 10-pin connector on
the control board making sure every pin on the control
board is inserted into the ribbon cable connector.

Helpful

Hint

FIG. 14-2 MEMBRANE SWITCH CONTINUITY

MEMBRANE SWITCH

39132 100609

Wrap a thin paper clip around each meter lead

and extend past the tip by ¼" - ½". You may

need to sand off the clear coating on some clips!