1. Check for and remove any jammed paper, scraps or hidden paper inside the exit cover area. Also inspect the Rapid Release guide for defects.
2. Check for a damaged Pivoting Exit Guide Assembly under the Exit Cover.
3. By hand, feed a sheet of cardstock (paper) into the preheater to remove any obstructions or paper scraps .
4. Check that the paper (media) in the tray is supported. For information on the supported paper weights, sizes, types and print areas see the following links:
   Phaser 840 All about media (supported paper sizes, types, print area and weights)
   Phaser 850 All about media (supported paper sizes, types, print area and weights)
5. Verify the tray back stop is not loose or missing from all removeable paper/media trays. See the following link for information on: Inspecting the paper tray for broken parts.

For additional troubleshooting information on inspecting the maintenance drawer, and preventing jams see the following links: Verify the maintenance drawer is not damaged or worn , Guidelines to prevent media jams.