If the paper feed roller is dirty, a multi-feed or misfeed might occur. Clean this part by following the cleaning procedure described below.
Do not use chemical cleaners or organic solvents such as thinners or benzine.
Turn off the main power switch and unplug the power cord.
Pull out the plug from the socket. Remove all the cables from the machine.
While pressing and holding the button in the upper center of the bypass tray, pull the tray open.
Using a damp cloth, wipe the paper feed roller. Then, wipe it with a dry cloth to remove any water.
Close the bypass tray.
Securely insert the plug of the power cord into the wall socket securely. Connect all the interface cables that were removed.
Turn the main power switch on.