1. Remove the right upper cover. (Right Upper Cover)
  2. Open the lock [A] and disconnect the flat cable [B].
  3. Release the flat cable [A] from the harness guide [B] and remove the cores [C].
  4. Release the flat cable [A] from the harness guide [B] and remove the core [C].
  5. Remove the DF top cover assembly. (DF Top Cover)
  6. Remove the harness [A] from the DF conveying unit [B].
  7. Pull out the flat cable [A] from the hole [B].
  8. Remove the cover [C] and release the flat cable [A].
  9. Remove the DF conveying unit [A].
  10. Push the lock lever [A] and rotate it to the release position.
  11. Slide the machine front side of the DF feed roller shaft [A] toward the machine left side, and then pull out the DF paper feed roller unit [B].
  12. Remove the jam release dial [A].
  13. Remove four screws.
  14. Slide the conveying guide [A] in the direction of the arrow to release three hooks.
  15. Detach the CIS assembly [A].
  16. Disconnect two connectors from the CIS assembly [A].
  17. Release both two hooks [A] of the front glass holder [B] and rear glass holder [C] in the direction of the arrow and detach them.

  18. Detach the CIS glass [D] and the front spacer [E] and rear spacer [F] from the CIS assembly [G].
    Since the front and rear spacers are not fixed, take care not to lose them.

    Check the position of black marking for the distinction of the front / back side of the glass.
    Also, make sure not to touch the glass surface.
    If it is dirty, wipe it off with a dry cloth.

  19. Detach the CIS [A] in the direction of the arrow.
    Take care not to lose two springs [B].

When reassembling, check that the spring is inserted on the boss of the CIS assembly.