Duplex unit does not operate correctly
These are possible solutions. Try one or more of the following:
Check paper size and type
Check the paper size and type to make sure the paper is supported by the printer. If you are using automatic duplexing, use only letter- or
Check for paper jams
Check for and clear any paper jams. For more information, see “Paper jam in the duplex unit” on page 98.
Make sure the duplex unit is properly installed
Remove the duplex unit and reinstall it. For more information, see “Paper jam in the duplex unit” on page 98.
Cartridge carrier jam
These are possible solutions. Try one or more of the following:
Remove any obstructions in the cartridge carrier
1Lift the access cover.
2Remove any objects blocking the path of the print cartridge carrier.
3Make sure the cartridge carrier lids are closed.
4Close the access cover.
5Press 
.
Remove and reinstall the print cartridges
1Lift the access cover.
2Press down on the cartridge carrier levers to raise the cartridge carrier lids.
3Remove both print cartridges.
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