The fusing paper feed sensor [A] detects jams by monitoring the ejected paper.

The fusing entrance sensor [B] detects paper remaining in the fusing area after a jam occurs. It is not used during normal printing.

If you replace the fusing entrance sensor [B], do the following initial procedure:

  1. Make sure that remaining paper does not block the optical path of the fusing entrance sensor [B] (blue arrow from the sensor).
  2. Close the drawer unit and the right cover.
  3. Do "SP1-134-001".
  4. Make sure that the value is around 200 to 400 in "SP1-134-002".
    If the value is not around 200 to 400, paper could be remaining in the fusing unit or the drawer unit may not be completely closed.
    Therefore, remove the paper from the fusing unit and close the drawer unit completely. Then do "SP1-134-001" again.
  5. Turn OFF the machine, and then turn it ON again.