Remove the sheet feeder trays - lift the rear of the tray slightly and pull it straight out from the inserter.
If the tray is loaded, gently hold the material in place to prevent it sliding forward as the tray is removed.
Remove the jammed material. If necessary, use the manual advance knob to move the material forward.
Tap the Clear Deck button to clear the paper path of any remaining material.
Once you locate the jammed material, you may need to use the manual advance knob to manually feed paper out of the grip of feed rollers.
The manual advance knob is located behind the drop-down cover at the left front of the inserter.
UPDATED: February 19, 2019