Oki B411d User Manual page 69

10. Check for paper jam in duplex unit.
> Remove the Image Drum as described in step
(1) by raising the coloured handles (2) on each side, and then by holding the
handles and gently lifting it out.
2
1
> Remove any paper and replace the duplex unit.
> Re-install the image drum as described in step
11. Check for paper jam under the Paper Guard.
> Remove the Image Drum as described in step
3.,
2
5.
3.
Troubleshooting > 69
then, remove the Duplex unit