161 • TroubleshootingDealing with unsatisfactory printingSYMPTOMS POSSIBLE CAUSES STEPS TO TAKEVertical whitelines can beseen on theprinted page.The LED head is dirty. Wipe the LED head with a soft, lint-freecloth.The toner is low. Open the top cover and tap the cartridgea few times to evenly distribute anyremaining toner. If symptoms persist,replace the toner cartridge.Foreign materials may bepresent in the image drum.Replace the image drum cartridge.Light-shielding film of the imagedrum cartridge is dirty.Wipe the film with a soft, lint-free cloth.Printed imagesare fadingvertically.The LED head is dirty. Wipe the LED head with a soft, lint-freecloth.The toner is low. Open the top cover and tap the cartridgea few times to evenly distribute anyremaining toner. If symptoms persist,replace the toner cartridge.The paper is not suitable for theprinter unit.Use recommended paper.Printing is light. The toner cartridge is notproperly seated.Reinstall the toner cartridge.The toner is low. Open the top cover and tap the cartridgea few times to evenly distribute anyremaining toner. If symptoms persist,replace the toner cartridge.The paper is moist. Use paper stored in proper temperatureand humidity conditions.The paper is not suitable for theprinter unit.Use recommended paper.Thickness and type of paper areinappropriate.Set a proper value for Media Weight andMedia Type in the Paper Setup menu, orset one value thicker for Media Weight.Recycled paper is being used. Set one value thicker for Media Weight inthe Paper Setup menu.Partially fadedimages. Whitespots and linesappear in solidprinting.Paper is moist or dry. Use paper stored in proper temperatureand humidity conditions.
