HP Color LaserJet 9500 Multifunction Printer series - Manual (Page 320)

http://www.hp.com/go/clj9500mfp
304 Chapter 9 – Problem solving Rev. 1.0
The “print on both sides” selection is not
available. • Make sure that the selected media type can be printed on both sides
(see “Selecting and using media” on page 159). Change the media type
to one that can be printed on both sides.
• Print a configuration page to make sure that the duplexer is installed
properly (see chapter 10 of the User Reference Guide on the CD-
ROM).
• Make sure that the duplexer has been configured in the printer driver
(see
“Setting the MFP device defaults” on page 9).
Situation Solution