Solutions
When horizontal banding (perpendicular to the printing direction) appears, or the top or bottom of the paper is smeared, load paper in the correct direction and slide the edge guides to the edges of the paper.
Solutions
When vertical banding (horizontal to the printing direction) appears, or the paper is smeared, clean the paper path.
Solutions
Place the paper on a flat surface to check if it is curled. If it is, flatten it.
Solutions
When copying on thick paper, the print head is close to the printing surface and the paper may be scuffed. In this case, enable the reduce scuff setting.
Select Settings > General Settings > Printer Settings, and then enable Thick Paper on the control panel. If you enable this setting, copy quality may decline or may slow down.