HP 8000dn Service Manual - Page 426

Table 7-15. Repetitive Defects (continued) Possible Cause Recommended Action 3. Rollers are dirty. Any dirty roller in the Examine and clean the rollers in the paper paper path may result in a repetitive print path. See "Cleaning the Printer and defect. Accessories" on page 88. 4. Fusing Assembly is dirty or defective. Clean the Fusing Assembly using alcohol. If the problem persists, replace the Fusing Assembly. See "Fusing Assembly" on page 187 for instructions. 5. Gears are worn, causing slippage or jumping. Inspect the gears driving the toner cartridge and the Fuser. Replace the Main Drive Assembly if necessary. See "Main Gear Assembly" on page 191 for instructions. 6. Paper does not meet specifications. The surface of the paper may be too coarse, causing repeated marks. Try a different media or paper lot (see HP LaserJet Printer Family Paper Specifications Guide). Table 7-16. Line at Edge of Paper Possible Cause Recommended Action Toner cartridge is defective. The Replace the toner cartridge. photosensitive drum is wearing out. The line will grow wider, with cross-hatching. Shaking the cartridge does not relieve the problem. Table 7-17. Misshapen Characters, Voids Possible Cause Recommended Action 1. Paper surface too rough. Toner migrates to low spots, leaving higher areas void. Turn EconoMode off. Use paper with correct finish (smoothness) (see HP LaserJet Printer Family Paper Specifications Guide). 402 Chapter 7 Troubleshooting EN