HP LaserJet 5100 Printer series - Manual (Page 160)

C-4 Printer Memory and Expansion
ENWW
If an optional duplexer is installed:
1 Slide the rear section of the duplexer
away from the printer.
2 Remove the rear section of the
duplexer by lifting and rotating the
rear section to clear all of the tabs in
the grooves, as illustrated.
3 Unplug the power cord and
disconnect any cables.
4 Remove the cable tray by lifting it out
of position, as illustrated.
Go back to Step 2, on page C-2.
Note
Reverse these steps to install the cable
tray and the rear section of the
duplexer. Make sure the cable tray is
properly installed and the cables are
routed through the left side.