Konica Minolta bizhub 4020i bizhub 5020i/4020i User Guide - Page 477
Examples of poor print quality, Recommendation, ABCD
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Examples of poor print quality Recommendation • • White Spots on black text and graphics at 3.7 in. (94 mm) intervals Make 10-15 copies of a blank, white sheet of paper. If the problem is not solved after printing the blank pages, the imaging unit may have foreign material, such as glue from a label, stuck on the drum. Clean the imaging unit. See Related Information:Clean the Imaging Unit. The imaging unit may be damaged. Replace the imaging unit with a new imaging unit. Black spots at 3.7 in. (94 mm) intervals ABCDEFGH abcdefghijk ABCD abcde 01234 Black toner marks across the page ABCDEFGH abcdefghijk ABCD abcde 01234 Black lines down the page Printed pages have toner stains down the page ABCDEFGH abcdefghijk ABCD abcde 01234 White lines down the page • If you use label sheets for laser printers, the glue from the sheets may sometimes stick to the drum surface. Clean the imaging unit. See Related Information:Clean the Imaging Unit. • If you used paper that has clips or staples, the imaging unit may be damaged. • If the unpacked imaging unit is in direct sunlight (or room light for long periods of time), the unit may be damaged. • Clean the imaging unit. • The toner cartridge may be damaged. Replace the toner cartridge with a new toner cartridge. • The imaging unit may be damaged. Replace the imaging unit with a new imaging unit. • Clean the corona wire inside the imaging unit by sliding the tab. Make sure that the tab on the imaging unit is in the Home position. • The toner cartridge may be damaged. Replace the toner cartridge with a new toner cartridge. • The imaging unit may be damaged. Replace the imaging unit with a new imaging unit. • The fuser unit may be contaminated. Contact customer support. • Make sure foreign material such as a torn piece of paper, sticky notes or dust is not inside the machine and around the toner cartridge and imaging unit. • The toner cartridge may be damaged. Replace the toner cartridge with a new toner cartridge. • The imaging unit may be damaged. Replace the imaging unit with a new imaging unit. 471