Cause:

If multi-sheet folding is performed after a large number of Z-folds have been performed, the tip of the blade used for the multi-sheet folding may be dirty, resulting in dirt on the paper.

This will produce dirt on the paper in an area of 1-3 cm (0.4-1.2 inches) in width (equal to the width of the blade) in the fold in the center of paper.

Solution:

Clean the blade.

  1. Open the front cover of the multi-folding unit.
  2. Pull the multi-folding unit out.
  3. Turn the N11 dial counterclockwise until the blade appears.
    The blade is located in the right part of the multi-folding unit.

  4. Wipe the tip and top of the blade with a soft dry cloth.

    • Be careful not to damage the blade.

  5. After cleaning, restore the machine so that it resumes operation.
  6. Apply multi-sheet folding and print 3-5 copies. The dirt on the paper will disappear.