HP LaserJet 5000 Service Manual - Page 288

Table 7-25. Repetitive Defects Possible Cause Action Toner Cartridge is damaged. The circumference of the photoconductive drum inside the toner cartridge is 94 mm (3.7 inches). If the defect repeats at this interval, the defect is associated with the drum. Inspect the drum for scratches or damage. Replace the Toner Cartridge. Dirty Rollers. Any dirty Examine and clean rollers in the paper path. roller in the paper path may result in a repetitive print defect. Fusing Assembly is Clean the Fusing Assembly using alcohol. If the dirty or defective. The problem persists, replace the Fusing Assembly. circumference of the lower fusing Pressure Roller is 86 mm (3.46 inches). If the defect repeats at this interval, the defect is associated with the Pressure Roller. Gears are worn, causing slippage or jumping. Inspect the gears driving the Toner Cartridge and the Fuser. Replace the Main Drive Assembly if necessary. Paper does not meet specifications: The surface of the paper may be too coarse, causing repeated marks. Try a different paper lot (see HP LaserJet Printer Family Paper Specifications Guide). EN Troubleshooting the Printing System 7-67