Konica Minolta bizhub 20 bizhub 20 User Guide - Page 126
Improving the print quality - replace drum
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Troubleshooting and routine maintenance Improving the print quality C Examples of poor print Recommendation quality Make sure that you use paper that meets our specifications. A rough C surfaced paper or thick print media can cause the problem. (See ABCDEFGH Acceptable paper and other print media on page 12.) abcdefghijk ABCD Make sure that you choose the appropriate media type in the printer driver or in the machine's Paper Type menu setting. (See Acceptable abcde 01234 paper and other print media on page 12 and Basic tab in the Software User's Guide on the CD/DVD-ROM.) The problem may disappear by itself. Print multiple pages to clear this White lines across the page problem, especially if the machine has not been used for a long time. The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 145.) ABCDEFGH abcdefghijk ABCD abcde 01234 White lines down the page Wipe the laser scanner windows with a dry, lint-free soft cloth. (See Cleaning the laser scanner window on page 138.) Make sure that a torn sheet of paper is not inside the machine covering the scanner window. The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 143.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 145.) Make sure that you use paper that meets our specifications. (See Acceptable paper and other print media on page 12.) Choose Thick paper mode in the printer driver, choose Thick in the machine's Paper Type menu setting or use thinner paper than you are currently using. (See Paper Type on page 19 and Basic tab in the Software User's Guide on the CD/DVD-ROM.) Hollow print Check the machine's environment. Conditions such as high humidity can cause hollow print. (See Choosing a location on page 92.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 145.) Make sure that you use paper that meets our specifications. (See Acceptable paper and other print media on page 12.) ABCDEFGH abcdefghijk ABCD abcde 01234 Gray background Check the machine's environment. Conditions such as high temperatures and high humidity can increase the amount of background shading. (See Choosing a location on page 92.) The toner cartridge may be damaged. Put in a new toner cartridge. (See Replacing a toner cartridge on page 143.) The drum unit may be damaged. Put in a new drum unit. (See Replacing the drum unit on page 145.) 117