4.Troubleshooting: Post-Processing Option
496
Leading edge 4mm pitch edges getting dirty
Cause
When the back curl correction (straightening paper which is curled face down) is enabled, nip the paper
with sponge roller (upper) [A] and metal roller (lower) [B]. Pressing deflection of sponge roller corrects
the curl.
If printed side faces up [C], toner becomes easy to come off from paper because the printed side is
pressed by the sponge roller to correct the curl. When this paper is transported to the finisher, the anti-
static brush [D] on the upstream of the punch unit catches the toner, and then toner is transferred to the
leading edges of paper.
This is likely to occur if:
This symptom could occur if these following conditions are true.
Decurler unit is mounted.
The back curl correction is required in decurler unit to prevent defective stacking.
Printed side faces up in the downstream peripherals
If you removed the anti-static brush, the alignment accuracy for stapling might worsen. In
this case, reduce the number of sheets of pre-stacking but the reducing productivity
cannot be avoided.
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