HP (Hewlett-Packard) HP Deskjet 6940 Printer User Manual


 
5. Remove any paper from inside the duplexer.
6. Close the duplexer, and then re-attach the duplexer to the printer.
Option for two-sided printing cannot be selected
The printer driver cannot sense the duplexer until a print job is sent to the printer. Print
a single-sided document, and then print the two-sided document. The option for using
the duplexer will appear in the printer software.
If the option for the duplexer still does not appear, verify that the following conditions
exist:
The duplexer is attached to the printer.
The duplexer is enabled in the printer software.
The media type and size selected on the Paper/Quality tab are supported by the
duplexer.
For a list of supported media types and sizes, see the specifications for the duplexer:
Automatic Two-Sided Printing Accessory
Auto Two-Sided Print Accessory with Small Paper Tray
Only one side of the page prints when the two-sided printing option is enabled
Verify that the following conditions exist:
The correct print options are set in both the printer software and the software
program that 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.
If the media type or size is not supported by the duplexer, you can print the document
by using the manual two-sided printing instructions.
The media type and size that is selected on the Paper/Quality tab are supported
by the duplexer.
Note Do not try to print a two-sided document on single-sided paper, such
as single-sided photo paper.
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