Brother International HL-2240 Users Manual - English - Page 117

Troubleshooting Examples of poor print quality Recommendation  Check the machine's environment. Conditions such as high humidity and high temperatures may cause this print quality problem.  If the problem is not solved after printing a few pages, put in a new drum unit. (See Replacing the drum unit on page 78.) White lines, bands or ribbing across the page  If the problem is not solved after printing a few pages, the drum unit may have 5 foreign material, such as glue from a label, stuck on the drum. Clean the drum 94 mm (3.71 in.) unit. (See Cleaning the drum unit on page 86)  The drum unit may be damaged. Put in a new drum unit. See Replacing the drum 94 mm unit on page 78. (3.71 in.) White Spots on black text and graphics at 94 mm (3.71 in.) intervals 94 mm (3.71 in.) 94 mm (3.71 in.) Black Spots at 94 mm (3.71 in.) intervals ABCDEFGH abcdefghijk ABCD abcde 01234 Black toner marks across the page  The drum unit may be damaged. Put in a new drum unit. See Replacing the drum unit on page 78.  The toner cartridge may be damaged. Put in a new toner cartridge. See Replacing the toner cartridge on page 71.  Make sure that you use paper that meets our specifications. See Acceptable paper and other print media on page 3.  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 Cleaning the drum unit on page 86.  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. 113