Service Manual

183
19.2.2 Main Control Board:
WARNING
Prior to removing the access cover to the machine compartment, disconnect the
supply voltage to the appliance. Failure to do this could result in an electrical
shock or possible death.
CAUTION
It is recommended that a grounding strap be used when working with any solid
state control board application.
19.2.2.1 Control Board Replacement
1. The main power board is located at the bottom, right hand, front corner of the machine
compartment.
2. To access the board, remove both the toe grill and access panel on the front of the
machine. To remove the access panel, the door should also be removed for
convenience.
3. The mullion bar separating the toe grill and the access panel should also be removed for
convenience.
4. Remove the 5/16” sheet metal screw that secures the control board in place.
5. Remove both large connectors on the bottom left hand side of the control board. Press
the release and pull each connector off its terminal.
6. The board can now be rotated into positon to disconnect the remaining electrical
connectors from the power board.
7. Once all wires are disconnected the board can then be maneuvered out of the
appliance.
8. The main board mounting bracket and the control housing are manufactured for a
positive fit upon installation.
a. The rear of the control bracket has two tabs to ensure a positive mounting
position.
b. The rear of the control housing has two accommodating slots to accept the
mounting tabs on the control board bracket.
c. Once the board is in position, it can be secured using the 5/16” sheet metal
screw.
9. Each wiring harness at the board is labeled as to its corresponding location on the
board. Prior to removing any harness, double check to insure that the identification on
each harness is legible for correct placement when repair in completed.
10. The control board terminals are also marked as to the correct harness locations.