Bunn ITB/ITCB Manual De Usuario

12

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

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

Removal and Replacement:
1.   Disconnect the ribbon cable from the 22-pin con-
nector 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 22-pin connector on 
the control board making sure every pin on the control 
board is inserted into the ribbon cable connector.

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! 

Helpful

Hint

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