- 96 -4. TroubleshootingBlack or White Dots AppearCause Solution ReferenceThe paper is unsuitable. Use recommended paper. Loading Paper (User's Manual)If the intervals of lines or spots areapproximately 94 mm (3.7 inches), thegreen tube of the image drum isdamaged or dirty.Lightly wipe the image drum with asoft tissue paper.Replace the image drum if it isdamaged.Replacing the Image Drum(User's Manual)Dirt is PrintedCause Solution ReferenceThe paper is damp. Replace the damp paper with newpaper. Loading Paper (User's Manual)The paper is unsuitable. Use recommended paper. Loading Paper (User's Manual)