HP 16V - Manual (Page 121)

Clearing Paper Jams
Close the rear stacker.
The following procedure is when your printer is equipped with an
optional duplex unit.
Be familiar with the paper paths in duplex
printing.
Duplex unit
4d.Remove paper tray 1 then
open the front door of the
duplex unit. Pull out tray 1
and grasp center of the
front door to unlock the
door.
Pull the door towards you
to open it.
5-6 User’s Manual