HP LaserJet 9040.9050 Multifunction Printer series - Manual (Page 131)

ENWW Clearing jams 127
Clearing jams from the duplex printing accessory (duplexer)
To clear jams in the duplex printing accessory
1 Move the output device away from the MFP to gain access to the left door.
2 Open the left door and carefully pull out any paper from area.
WARNING! Avoid touching the adjacent fusing area. It can be hot.
3 Remove the duplex printing accessory by pressing the green lever and pulling the unit out
until it stops.
4 Remove any paper by lifting the two green levers in the duplex printing accessory.