Brother HL-7050N - Manual (Page 188)

TROUBLESHOOTING 6 - 20
HL7050_US_UG_FM5.5
3 Use both hands to pull the Duplex unit out of the printer.
Figure 6-16
Look inside the printer's slot for the Duplex unit to make sure
that the jammed paper is not in there.
When you pull out the Duplex unit, be sure to hold it firmly
with both hands (the shaded part in the illustration is
heavier).
Figure 6-17