Dell 2335dn Dell™ 2335dn MFP User's Guide - Page 258
Paper Specifications, Vertical, repetitive defects, Replacing the Toner Cartridge
UPC - 884116001898
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White Spots Vertical lines A single sheet of paper may be defective. Try reprinting the job. The moisture content of the paper is uneven or the paper has moist spots on its surface. Try a different brand of paper. See "Paper Specifications". The paper lot is bad. The manufacturing process can cause some areas to reject toner. Try a different kind or brand of paper. The toner cartridge may be defective. "Vertical repetitive defects" on the next page. If these steps do not correct the problems, contact a service representative. White spots appears on the page: The paper is too rough and a lot of dirt from a paper falls to the inner devices within the machine, so the transfer roller may be dirty. Clean the inside of your machine. Contact a service representative. The paper path may need cleaning. Contact a service representative. If black vertical streaks appear on the page, the drum inside the toner cartridge has probably been scratched. Install a new toner cartridge. See "Replacing the Toner Cartridge". If white vertical streaks appear on the page, the surface of the LSU part inside the printer may be dirty. Clean the LSU (see "Cleaning the Interior"). Gray background Toner smear If the amount of background shading becomes unacceptable: Change to lighter weight pages. See "Paper Specifications". Check the printer's environment; very dry (low humidity) or high humidity (higher than 80% RH) conditions can increase the amount of background shading. Remove the old toner cartridge and install a new one. See "Replacing the Toner Cartridge". Clean the inside of the printer. See "Cleaning the Interior". Check the paper type and quality. See "Paper Specifications". Remove the toner cartridge and install a new one. See "Replacing the Toner Cartridge".