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Installing other software
The following drivers and optional software are also available for installation on the printer.
●HP Web Jetadmin: This is a Web browser-based network printer management tool. A link to the
HP Web Jetadmin website is included on the Starter CD. For more information about using this
HP Web Jetadmin software.
Linux driver: Available at
www.hp.com/support. For more information about using Linux with HP
If you are using Windows NT 4.0, Windows 2000, or Windows XP, you must have administrator
privileges to install a printer driver.
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See HP supplies and accessories for information about ordering accessories.
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Installing the automatic two-sided printing accessory
You can print on both sides of a sheet of paper automatically when the automatic two-sided printing
accessory (duplex unit) is installed on the printer. The duplex unit comes with the HP Officejet Pro
K850dn Color Printer. It can also be ordered separately. See
HP supplies and accessories. For
information on using the duplex unit, see
Printing on both sides (duplexing).
To install the duplex unit
1.Push the buttons on both sides of the rear-access panel.
2.Remove the panel from the printer.
3.Slide the duplex unit into the printer until the unit locks into place.
NOTEDo not press the buttons on either side of the duplex unit when installing; use
them only for removing the unit from the printer.
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3 Using the printer
This section provides information on media usage for the printer, changing print settings, and
performing basic printing tasks.
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Selecting print media
The printer is designed to work well with most types of office paper. It is best to test a variety of print
media types before buying large quantities. Use HP media for optimum print quality. See
and accessories. For more information about HP media, see www.hp.com.
Tips for selecting and using print media
For the best results, observe the following guidelines.
●Always use media that conforms to the printer specifications. See
for supported media.
●Select the appropriate media type and size from the printer driver. See
Changing print settings.
●Load only one type of media at a time into a tray.
●For the input tray, load media print-side down and aligned against the right and back edges of
the tray. See
●Do not overload the tray. See
Understanding specifications for supported media.
●To prevent jams, poor print quality, and other printer problems, avoid the following media:
●Media that is damaged, curled, or wrinkled
●Media with cutouts or perforations
●Media that is heavily textured, embossed, or does not accept ink well
●Media that is too lightweight or stretches easily
●If using recycled media, you might need to lower the ink volume in the printer software to prevent
smeared ink. However, if you lower the ink volume too much, the output might appear washed out.
●If using recycled media, you might need to use another media type to prevent paper jams.
Cards and envelopes
●Avoid envelopes that have a very slick finish, self-stick adhesives, clasps, or windows. Also avoid
cards and envelopes with thick, irregular, or curled edges, or areas that are wrinkled, torn, or
●Use tightly constructed envelopes, and make sure the folds are sharply creased.
●Load envelopes into the printer according to the icon on the tray.
●Use the Best mode to print photographs. Note that in this mode, printing takes longer and more
memory is required from your computer.
●Remove each sheet as it prints and set it aside to dry. Allowing wet media to stack up might
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