HP CP6015dn Service Manual - Page 533

Problem Some color is misregistered. Toner smears appear on the media. Cause Solution The product is incorrectly calibrated. Calibrate the product. See Calibrate the product on page 479. The ITB unit is defective. If the ITB does not rotate smoothly or a cleaning malfunction occurs (ITB is dirty), replace the ITB unit. See Intermediatetransfer belt (ITB) on page 196. The drive gear of the ITB motor is worn or chipped. Check each drive gear between the ITB drive roller and the ITB motor. If the gear is worn or chipped, replace the drive unit. See Intermediate-transfer belt (ITB) motor on page 231. The color misregistration sensor is defective. Replace the color misregistration/imagedensity sensor unit. The laser/scanner unit is defective. Replace the laser/scanner unit. See Laser/ scanner assembly (cyan and black) on page 297. The product has residual media. Remove the residual media. Poor grounding contacts exist between each image drum and the product. Clean the grounding contacts on each drum and the product. If the problem remains after cleaning, check the contacts for damage. Replace any deformed or damaged parts. The fuser inlet guide is dirty. Clean the fuser inlet guide. The printed page contains misformed characters. The product is experiencing page skew. The laser/scanner unit is defective. See the "Text or graphics are skewed on the printed page" row in this table. Replace the laser/scanner unit. See Laser/ scanner assembly (cyan and black) on page 297. Text or graphics are skewed on the printed page. The registration shutter spring is unhooked. The registration shutter spring is deformed. Check the spring and place it in the correct position. Replace the secondary-transfer unit. See Secondary transfer unit on page 210. ENWW Solve image-quality problems 491