If the paper tray or paper feed roller is dirty, a multi-feed or misfeed might occur. Clean these parts by following the cleaning procedure for Tray 1 described below. The cleaning procedure is the same for the optional paper feed units.
Turn off the printer and unplug the power cord.
Remove all the cables from the printer.
Pull the tray carefully until it stops, lift the front side of the tray, and then pull it out of the printer.

Place the tray on a flat surface.
If there is paper in the tray, remove the paper.
Wipe the rubber part of the roller with a soft damp cloth. After that, wipe it with a dry cloth to remove the moisture.

Move the printer to the edge of a stable table or desk.

Do not put the printer on an unstable or tilted surface.
If the printer is equipped with the optional paper feed unit, do not move the printer and unit together as they are not securely attached.
When lifting the printer, confirm that the optional paper feed unit is not attached to the printer.
Wipe the rubber part of the roller with a soft damp cloth. After that, wipe it with a dry cloth to remove the moisture.

Do not use chemical cleaner or organic solvent such as thinner or benzene.
Move the printer back to its original position. Lift the front of the tray, and slide it carefully into the printer until it stops.

Do not slide the paper tray in with force. If you do, the front and side guides might move.
Firmly insert the plug of the power cord into the wall socket. Connect all the interface cables that were removed.
Turn the main power switch on.
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Follow the same procedure to clean the paper feed roller of the optional paper feed unit.