HP LaserJet 9050 Printer series - Manual (Page 103)

ENWW Clearing jams 101
3 Close the tray.
4 Open and close the right door to reset the printer.
To clear jams in optional Tray 4
1 Open the vertical transfer door on optional Tray 4.
2 Check for paper in this area, and remove any paper from this area. Carefully check to be
sure that you have removed all pieces of torn paper.