1. Remove the front cover. (Front Cover)
  2. Lay down the mailbox upside down.
  3. Remove three screws at the front side, and remove the inverter guide door sensor bracket [A].
  4. Remove two screws at the rear side.
  5. Remove the inverter guide plate [A] by pulling it out in the direction of the arrow.
  6. Remove the paper entrance sensor bracket [A].
  7. Remove the paper entrance sensor [A].