Toner Smear (continued) Toner Specks Vertical Smudges Vertical White Lines 126 Chapter 6 Troubleshooting C4170-90959 Possible Cause Action Engine Controller is defective. The Engine Controller regulates fusing roller temperature. If a new Fuser does not resolve the problem, replace the Engine Controller Assembly. Possible Cause Action Dirt in printer. 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. 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. Engine requires cleaning See “Engine Cleaning” (page 60) 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). Possible Cause Action Lack of toner or faulty Toner Cartridge. Redistribute the toner in the Toner Cartridge. If the 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.