User`s guide

AcuLaser M4000 Series User's Guide
Troubleshooting 152
Paper Jam DM (Duplex Unit’s cover)
When a paper jam occurs in the location shown in the illustration below, the Paper Jam DM
message appears on the printer’s LCD panel.
Follow these steps to clear paper jams in the Duplex Unit’s cover.
1. Press the unlock button to unlock the hooks. Then open the cover of the Duplex Unit.