Lexmark E220 Service Manual - Page 121

White or black lines or bands 4500 FRU Toner cartridge (not a FRU) Drive gear assembly Action Banding appears as light or dark horizontal lines on a uniformly gray page or on a page with a large area of graphics. Banding is primarily due to a variation in the speed of the paper as it feeds through the printer especially in the developer and transfer process. Inspect the toner cartridge and paper feed components, especially the drive gears, for signs of wear, debris, binds, or damage. Replace the drive gear assembly as necessary. Toner on back of page FRU Print cartridge (not a FRU) Fuser hot roll Backup roll Transfer roll Action Inspect the overall paper path for signs of spilled toner. Gently clean the contaminated areas with a soft cloth or compressed air. The fuser hot roll can cause toner on the back of the paper if toner is building up on the hot roll. This buildup may transfer to the backup roll, later transferring to the back of the paper. Inspect the hot roll and backup roller for signs of contamination and replace as necessary. A transfer roll contaminated with toner can cause toner to transfer to the back of printed pages. Inspect the transfer roll for contamination and replace as necessary. Diagnostic information 2-91