Brother International MFC-8710DW Basic User's Guide - English - Page 131
ABCDEFGH, White Spots on black text, and graphics at, 7 in., mm intervals, Black Spots
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Troubleshooting Examples of poor print quality White Spots on black text and graphics at 3.7 in. (94 mm) intervals Recommendation Make 10-15 copies of a blank, white sheet of paper. If the problem is not solved after printing the blank pages, the drum unit may have foreign material, such as glue from a label, stuck on the drum. Clean the drum unit. See Advanced User's Guide: Cleaning the drum unit. The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit uu page 76. Black Spots at 3.7 in. (94 mm) intervals ABCDEFGH abcdefghijk ABCD abcde 01234 Black toner marks across the page If you use label sheets for laser printers, the glue from the sheets may sometimes stick to the OPC drum surface. Clean the drum unit. See Advanced User's Guide: Cleaning the drum unit. Make sure that you use paper that meets our specifications. See Acceptable paper and other print media uu page 19. Do not use paper that has clips or staples because they will scratch the surface of the drum. If the unpacked drum unit is in direct sunlight or room light, the unit may be damaged. The toner cartridge may be damaged. Put in a new toner cartridge. See Replacing the toner cartridge uu page 68. The drum unit may be damaged. Put in a new drum unit. B See Replacing the drum unit uu page 76. 119