HP Color LaserJet Enterprise CP5525 Service Manual - Page 551

Problem Sample Vertical white lines appear in all colors. Horizontal lines appear on the page. A horizontal white line appears on the page. Image in a particular color does not print in the correct color. Cause Horizontal scratches on the fuser roller. Scratches are present on the circumference of the ITB. Solution Replace the fuser. Replace the affected print cartridge. Replace the ITB. Repetitive horizontal lines appear. Use the repetitive defects ruler to identify the dirty roller. Clean the roller. If the roller cannot be cleaned, replace the fuser. Horizontal scratches are present on the photosensitive drum. Replace the print cartridge of the color that matches the defect. Horizontal scratches are present on the fuser roller. Replace the fuser. Repetitive horizontal white lines appear. Use the repetitive defects ruler to identify the dirty roller. Clean the roller. If the roller cannot be cleaned, replace the roller. Horizontal scratches are present on the photosensitive drum. Replace the print cartridge of the color that matches the defect. Scratches are present on the circumference of the ITB. Replace the ITB. Poor contact exists in the primary charging bias or developing bias contacts between the print cartridge and the product. Clean each contact of the color that produces the missing color. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. The print cartridge (primary charging roller, developing roller, or photosensitive drum) is defective. Replace the print cartridge of the color that matches the defect. The imaging high-voltage power-supply is defective (no primary charging bias or developing bias output). Replace the imaging high-voltage power-supply. The laser/scanner unit is defective. Replace the laser/scanner assembly. ENWW Solve image-quality problems 527