Dell 7330dn User Guide - Page 205

Horizontal Dark Streaks There are black lines that appear horizontally on the page. Print-Quality Problems Possible Causes Solutions The drum cartridge may be defective or at the end of its life. The paper path may be contaminated with toner. The fuser may be defective. Replace the drum cartridge. Print several blank sheets of paper to remove the toner accumulations. Replace the fuser. Vertical Dark Streaks There are black lines that appear vertically on the page. Possible Causes Solutions The paper path may be contaminated with toner. Print several blank sheets of paper to remove the toner accumulations. The drum cartridge may be defective or at the end of its life. Replace the drum cartridge. The fuser may be defective. Replace the fuser. Dell 7330 Mono Laser Printer 6-63