User’s Guide> 77Vertical linesappear.The image drumcartridge is damaged.Replace the image drumcartridge.The toner is low. Replace the toner cartridge.Horizontal Linesand spots appearperiodically.When the interval isabout 94mm (4in), theimage drum (the greentube) is damaged ordirty.Wipe it lightly with a softcloth. Replace the imagedrum cartridge when it isdamaged.When the interval isabout 42mm (1.5in),there may be foreignparticles in the imagedrum cartridge.Open/close the top cover,and print again.When the interval isabout 87mm (3.5in),the fuser unit isdamaged.Replace the fuser unit.The image drumcartridge has beenexposed to light.Replace the image drumcartridge if the problem isnot resolved.White area of paperis lightly stained.Paper contains static. Use paper stored in propertemperature and humidityconditions.Too thick paper is used. Use thinner paper.The toner is low. Replace the toner cartridge.Periphery of theletters is smudged.The LED head is dirty. Wipe the head with LED lenscleaner or with a soft cloth.Toner comes offwhen it is rubbed.The thickness and typeof the paper areincorrectly set.Set the correct value of[Media Type] and [MediaWeight] in the menu setupor set one value thicker for[Media Weight].Recycled paper is used. Set one value thicker for[Media Weight] in the menusetup.Glossiness is notuniform.The thickness and typeof the paper areincorrectly set.Set the correct value of[Media Type] and [MediaWeight] in the menu setupor set one value lighter for[Media Weight].SYMPTOMS POSSIBLE CAUSES STEPS TO TAKE