1. Open the controller box (Opening the Controller Box)
  2. Remove the rear cover (Rear Cover)
  3. Remove the vertical stay (x2)
  4. The IOB is on the back of the machine below the flywheel.
  5. Disconnect the board (x17,x28).
  6. Disconnect the board from its bracket (x6)
  7. If you are replacing the IOB:
    • Note the positions of the DIP switches on the old board.
    • Set the DIP switches on the new board in the same way. (The switches may be different according to your geographical area.)