1. Remove the retard roller unit. (Retard Roller Unit)
  2. Remove the cassette (a) from the paper feeder (b).
  3. Place the paper feeder (a) while turning it over. 
  4. Push the lock lever (a).
  5. Slide the feed roller pin (b) straight and release the lock.
  6. Push the lock lever (a).
  7. Detach the paper feed roller unit (b).
  8. Remove the paper feed roller [A] and/or pick-up roller [B].