Lexmark C920 User Manual page 106

Check Area D
This message indicates a paper jam in the duplex unit area. To clear area D:
1
Open the duplex jam access door on the right side of the printer.
2
Gently pull out the duplex unit.
3
Turn the paper forwarding dial counterclockwise.
If the paper advances out of the duplex unit, remove the jam and go to step 7. If the paper does not advance, go to
step 4.
200 Paper Jam <x> Pages Jammed (Check Areas A-F, T1-5, MPF)
Clearing jams
106