Dell 1135N Service Manual - Page 109
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Alignment and Troubleshooting 8) Background Description : Light dark background appears in whole area of the printing. 1. Does character exist less than 2% per a page, or has machine been left used for a long time? 2. Is a recycled toner cartridge be used? The toner cartridge is basically designed to print 7K sheets with 5% image. If it prints more than 8K sheets with 2% coverage, a background can occur. The A/S is not guaranteed if using a recyled the toner cartridger. 3. Has the life span of the toner cartridge ended? Replace the toner cartridge when the life span of it has been ended. 4. Is the movement(Up and Down) of the transfer roller smooth? Clean the bushing part of the transfer roller. 5. Is the HVPS normal? 1. If the problem is still not solved, replace the toner cartridge. 2. Gently shake the toner cartridge. Service Manual 4-36