HP Color LaserJet Enterprise CM4540 Service Manual - Page 671

Problem The printed page contains wrinkles or creases. Sample The front of the page is dirty. Repetitive horizontal lines Pages have flecks of toner Pages have one or more skewed color planes (can appear on the right or left side of the page) Cause Solution The roller or media feed guide Clean any dirty components. is dirty. A feed roller is deformed or has deteriorated. Replace any deformed or deteriorated rollers. The paper feed guide is damaged. Replace the paper-feed-guide unit. The photosensitive drum is dirty. Replace the print cartridge. The fuser roller or pressure roller is dirty. Execute a Pressure roller clean mode. If the dirt does not come off, replace the fuser. See Fuser on page 112. NOTE: Cleaning the fuser with HP tough paper provides better results than with plain paper. You might need to execute the cleaning process several times to remove all contaminates on the fuser. See repetitive image defect ruler. Clean the indicated roller. If the contaminate does not come off, replace appropriate roller or assembly. Execute a cleaning page to clean the contaminate off the fuser. The cleaning page may need to be run several time to clean the fuser. Do not replace the fuser. NOTE: Cleaning the fuser with HP tough paper provides better results than with plain paper. You might need to execute the cleaning process several times to remove all contaminates on the fuser. Remove and then reinstall the print cartridge associated with the defect. ENWW Solve image-quality problems 619