Horizontal White Lines Light Print 122 Chapter 6 Troubleshooting C4170-90959 Possible Cause Action Toner Cartridge is nearly empty. This can cause uneven toner distribution. Remove the Toner Cartridge and shake it gently. The cartridge will soon require replacement. Toner Cartridge has been exposed to too much light. Store the Toner Cartridge in a darkened environment for several days. This may restore the photosensitive potential. Foreign objects in beam path. Any foreign objects will block the light from developing an image on the Photosensitive drum. Remove the Toner Cartridge and check for damage. Replace the Toner Cartridge if it is damaged.
Remove the Printer Cover and inspect the path from the Laser Scanner to the Toner Cartridge drum, looking for foreign objects in the beam path. Dirty or obstructed fuser entrance guide Clean the Fuser entrance guide Scared or obstructed Fuser film unit surface Replace the Fuser film unit Scarring on the photosensitive drum or defective developing cylinder Replace the Toner Cartridge Dirty mirror in Laser Scanner Replace the Laser Scanner Possible Cause Action Wrong toner density setting. Adjust the toner density setting in the print driver. Make sure EconoMode is off.
Toner Cartridge requires cleaning See “Toner Cartridge Cleaning” (page 61) 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. See “Media Troubleshooting” (page 129). Poor contact between the Engine Controller Assembly and the transfer roller shaft contact. 1. Clean the contacts if they are dirty.
If the problem remains after cleaning, or if parts are damaged or deformed, replace them. 2. Replace the Engine Controller Assembly and the Intermediate PCB if necessary.