Lexmark CX730 Users Guide - Page 281
Horizontal white lines
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Troubleshoot a problem 281 Action Step 2 a Load paper from a fresh package. Note: Paper absorbs moisture due to high humidity. Store paper in its original wrapper until you use it. b Print the document. Yes Go to step 3. No The problem is solved. Do vertical dark lines appear on prints? Step 3 a Remove the color imaging kit, and then remove the black imaging unit. Contact customer support. Warning-Potential Damage: Do not expose the color imaging kit and black imaging unit to direct light for more than 10 minutes. Extended exposure to light may cause print quality problems. Warning-Potential Damage: Do not touch the photoconductor drum under the color imaging kit and black imaging unit. Doing so may affect the quality of future print jobs. b Insert the black imaging unit, and then insert the color imaging kit. c Print the document. The problem is solved. Do vertical dark lines appear on prints? Horizontal white lines Notes: • Before solving the problem, print the Print Quality Test Pages. From the home screen, touch Settings > Troubleshooting > Print Quality Test Pages. • If horizontal white lines keep appearing on the prints, then see the "Repeating defects" topic.