HP Deskjet 6943 Printer - Manual (Page 110)

3. Remove any paper inside the printer.
4. Open the duplexer.
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 media type and size selected on the Paper Type/Quality pane 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:
Chapter 12
108 HP Deskjet 6940 series