HP 2100 Service Manual - Page 136

Toner Smear (continued) Possible Cause Action Engine Controller is If a new Fuser does not resolve the problem, replace defective. The Engine the Engine Controller Assembly. Controller regulates fusing roller temperature. Toner Specks Possible Cause Dirt in printer. Action 1. Print a few more pages to see if the problem corrects itself. 2. Clean the inside of the printer ("Engine Cleaning" (page 60). Paper does not meet printer specifications or is stored improperly. 1. Print a few more pages to see if the problem corrects itself. 2. Turn over the stack of paper in the tray. Also try rotating the paper 180 degrees. Engine requires cleaning 3. Check the paper (or other print media) type and quality. Replace the paper, and advise the customer to use the recommended paper and store it properly. See "Engine Cleaning" (page 60) Vertical Smudges Possible Cause Action Paper path contamination or damage. 1. Check the Toner Cartridge and replace it if necessary. 2. Check the Fuser and replace it if necessary. See the "Repetitive Defect Ruler" (page 127). Vertical White Lines Possible Cause Action Lack of toner or faulty Redistribute the toner in the Toner Cartridge. If the Toner Cartridge. problem persists, replace the Toner Cartridge. Dirt in the laser path. Clean the laser path. (Remove the Laser Scanner Assembly and clean the lens.) Defective Fuser. Replace the Fuser Assembly. Dirty mirror in the Laser Scanner. Replace the Laser Scanner. 126 Chapter 6 Troubleshooting C4170-90959