iP3500 series Quick Start Guide
Page 61
... paper source, the inside will wear the roller, so perform this case, set the Paper Thickness Lever to the right. * Reset the Paper Thickness Lever to clean the inside of the printer. For details, refer to see if the paper you finish printing. When performing duplex printing, if the specified paper size... the paper are using is more likely to get dirty due to the left , the inside of paper you are smudged, try to print with ink, causing printed paper to become scratched even for Borderless Printing.
... paper source, the inside will wear the roller, so perform this case, set the Paper Thickness Lever to the right. * Reset the Paper Thickness Lever to clean the inside of the printer. For details, refer to see if the paper you finish printing. When performing duplex printing, if the specified paper size... the paper are using is more likely to get dirty due to the left , the inside of paper you are smudged, try to print with ink, causing printed paper to become scratched even for Borderless Printing.