Improving the print quality

Examples of poor print quality

Recommendation

White lines across the page

•	Make sure that you use paper that meets our specifications. A rough surfaced paper or thick print media can cause problems.
•	Make sure that you choose the proper media type in the printer driver.
•	The problem may disappear by itself. Print multiple pages to clear this problem, especially if the printer has not been used for a long time.
•	The drum unit may be damaged. Put in a new drum unit. See Replacing the toner cartridge.

Lines across the page

•	Clean the inside of the printer and the primary corona wire in the drum unit. See Cleaning.
•	The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit.

White lines down the page

•	Make sure that a torn piece of paper is not inside the printer covering the scanner window.
•	Wipe the scanner window with a soft cloth. See Cleaning the inside of the printer.
•	The toner cartridge may be damaged. Put in a new toner cartridge. See Replacing the toner cartridge.
•	The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit.

White Spots on black text and graphics at 94 mm (3.7 in.) intervals

Black Spots at 94 mm (3.7 in.) intervals

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If the problem is not solved after printing a few pages, the drum unit may have glue from the label stuck on the OPC drum surface.

Clean the drum unit as follows:
1	Put the print sample in front of the drum unit, and find the exact position of the poor print.
2	Turn the drum unit gear by hand while looking at the surface of the OPC drum (1).
3	When you have found the mark on the drum that matches the print sample, wipe the surface of the OPC drum with a cotton swab until the dust or paper powder on the surface comes off.

CAUTION

DO NOT clean the surface of the photosensitive drum with a sharp object.

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The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit.