Lexmark C780, C782 manual Top to Bottom or Left to Right, Marks occur repeatedly only in one color

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

Color misregistration	Color has shifted outside of the	Open the printer door, and make sure all four
	appropriate area or has been	packaging tabs are removed.
	superimposed over another color
	area.
ABCDE
ABCDE
		Top to Bottom or Left to Right:
		1 Re-seat the cartridges by removing them from the
		printer and then reinserting them.
		2 Invoke a Color Adjust operation from the Settings
		Æ Quality menu.

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,	• Replace the cartridge if the defects occur every:
	or the fuser is defective.
		– 38 mm (1.5 in.)
		– 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.
White or colored line	Either the print cartridges are	1	Replace the color print cartridge that is causing
	defective, the image transfer unit		the line.
	and transfer roller are defective,	2	If you still have the problem, replace the image
ABCDE	or the fuser is defective.		transfer unit and transfer roller.
		3	If you still have the problem, replace the fuser.
ABCDE
ABCDE

Solving print quality problems

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