HP Deskjet 5850 Color Inkjet Printer - Manual (Page 210)

automatic two-sided printing problems
(if optional Two-Sided Printing Accessory is attached to printer)
paper jam occurs inside the two-sided printing accessory
See paper jam for instructions.
option for two-sided printing cannot be selected
Verify the following:
●
The Two-Sided Printing Accessory (duplexer) is attached to the printer.
●
The duplexer is enabled in the printer software.
●
The media type and size selected in the Paper/Quality tab are supported by the
duplexer.
See the documentation that came with the duplexer for a list of supported
media types and sizes.
only one side of the page prints when the two-sided printing option is enabled
Verify the following:
●
The correct print options are set in both the printer software and the
application you are using.
●
The photo paper is not curled, if you are printing on two-sided photo paper.
Photo paper should be flat before printing. See
storing and handling photo
paper for more information.
●
The media type and size selected in the Paper/Quality tab are supported by the
duplexer.
See the documentation that came with the duplexer for a list of supported
media types and sizes.
If the media type or size is not supported by the duplexer, you can print the
document using the
manual two-sided printing feature .
binding margin is in the wrong place
1. Open the Printer Properties dialog box.
2. Select the Finishing tab.
3. Verify that: