Symptom

A J151 or J156 Jam occurs when printing out to the proof tray.

  • J151: Entrance Sensor : Lag Jam
  • J156: Proof Tray Exit Sensor: Late Jam

The paper jam occurs at the R3 guide plate. There is some damage at leading edge of the jammed paper, which seems to result from being scratched by the pawls.

Cause

The J151/156 jam is caused by incorrect assembly of the proof guide plate. When the proof guide plate is not at the correct position, the leading edge of the paper is caught by a groove between the proof guide plate [A] and the R3 guide plate [B]. Then the paper jam occurs.

Solution

Check whether the proof guide plate, which is integrated with the upper cover, is at the correct position. Check that the screw of the proof guide plate is fixed at the center of the slotted hole.

  • [A]: OK
  • [B]: NG

If the screw is not fixed at the center of the slotted hole, remove the three screws shown below. Then fasten the screws in the order of ,,.

  • If you remove the proof guide plate for maintenance, make sure that the proof guide plate is at the correct position as described above after installing it.
  • Do not modify the magnetic part [B] of the R3 guide plate [A]. If you modify the magnetic part [B], the R3 guide plate cannot go back to the correct position. Then the paper jam could occur.