1. Remove the screw covers [B] on the back of the operation panel. Remove the arm upper cover [A].
  2. Remove the screw cover [B] from the rear cover [A].
  3. Remove the rear cover [A].
  4. Disconnect the grounding wire and the connectors.
  5. Remove the fixing screws of the operation panel [A].
  6. Remove the operation panel [A] from the hooks of the operation panel arm [B].