Lexmark C770, C772 manual Marks occur repeatedly only in one color, Multiple times on a, Colors

Troubleshooting

The information in the following table may help you solve print quality problems. If these suggestions still do not correct the problem, call for service. You may have a printer part that requires adjustment or replacement.

Symptom	Cause	Solution
Repeating defects	Either the print cartridges are	Marks occur repeatedly only in one color and
	defective, the image transfer unit	multiple times on a page:
	and transfer roller are defective, or	• Replace the cartridge if the defects occur every:
	the fuser is defective.
		– 48 mm (1.9 in.)
		– 97 mm (3.8 in.)
		Marks occur down the page repeatedly in all
		colors:
		• Replace the transfer roll if the defects occur every
		60 mm (2.4 in.)
		• Check the first transfer bellcranks and springs or
		replace the image transfer unit if the defects occur
		every 101 mm (4 in.)
		• Replace the fuser if the defects occur every
		148 mm (5.8 in.)
		Marks occur on every third or sixth page in any
		color:
		Replace the image transfer unit.

Color misregistration	Color has shifted outside of the	Top to Bottom or Left to Right:
	appropriate area or has been	1	Re-seat the cartridges by removing them from the
	superimposed over another color
			printer and then reinserting them.
	area.
		2	Adjust the Color Alignment under the Utilities
ABCDE			Menu.
ABCDE
White or colored line	Either the print cartridges are	1	Replace the color print cartridge causing the line.
	defective, the image transfer unit	2	If you still have the problem, replace the image
	and transfer roller are defective, or
			transfer unit and transfer roller.
	the fuser is defective.
ABCDE		3	If you still have the problem, replace the fuser.
ABCDE
ABCDE

Solving print quality problems

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