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SERVICE (Cont.)
Membrane Switches (Model MHG only)
Location:
The membrane switch is located on the front of the 
hopper housing.
Test Procedure:
1.  Press and hold the right hidden button to enter 
programming.
2.  Scroll through the menus to Service Tools and 
select YES.
3.  Select YES at Test Outputs and scroll through to 
Test Switches by pressing NEXT.
4.  Follow the chart below to test all switches.
If any of the switches indicate a fault, replace the 
membrane switch.
FIG 57 MEMBRANE SWITCH
PRESSING ANY BUTTON
EXCEPT THE RIGHT HIDDEN
BUTTON WILL DISPLAY
THE BUTTON NAME
ON THE SCREEN
TEST SWITCHES?
NO                        YES
PRESS RIGHT
HIDDEN TO EXIT
NOTHING PRESSED
TEST FREQUENCY?
NO                     YES
Removal and Replacement
1.  Disconnect the grinder from the power supply.
2.  Remove the rear access panel.
3.  Disconnect the membrane switch harness from the 
control board.
4.  Carefully peel the membrane switch from the front 
of the switch bezel.
5.  Remove any excess adhesive from the bezel sur-
face.
6.  Remove the backing from the new membrane 
switch.
7.  Feed the membrane switch harness through the 
openning and apply the new membrane switch to 
the switch bezel.
8.  Connect the switch harness to J9 on the display 
board.
41545 122209