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 can not be avoided.
Solution
Check that “Adjustment Settings for Skilled Operators” of 0304: [De-curler Setting] (SP1-906-001 to 012) is set to 3 – 5 (back curl correction).
Yes: go to the next step
No: This might be a different cause. Refer to the other troubleshooting.
Check if the back curl correction can be cancelled.
Cancel the back curl correction if paper does not require back curl correction and does not effect stacking is loaded.
Make a test copy and go to next step if the problem is still occur.
Check if the output orientation can be set as face down.
If the output orientation is facing up, set the output orientation facing down. (do the reverse setting)
Make a test copy and go to next step if the problem is still occur.
Remove the anti-static brush.
If you have to set the back curl correction, and then use duplex printing (print facing up), remove the anti-static brush.
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 if you use stapling.
“Adjustment Settings for Skilled Operators” of 0606: [Adj Pre Stack Number] (SP6-225-001 to 014)
