1. Open the controller box.
  2. Remove the rear cover.
  3. The RYB is at the bottom of the back of the machine, below the horizontal duct.
  4. Remove the vertical stay [A] (x3).
  5. Disconnect the board [B] (x9,x21).
  6. Disconnect the bracket (x4).
  7. Remove the bracket (with board attached).
  8. Separate board from bracket (x6).