HP LaserJet 9000 Printer series - Manual (Page 102)

7 Problem solving 102
Clearing jams
6 Check for paper in the duplex printing accessory area, and remove any paper by
pulling it out of the product. Be careful not to tear the paper.
7 Reinstall the duplex printing accessory by sliding it back into the slot until it
locks into place.
8 Close all open doors. Push the output device back into place.
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