Brother HL-1800 series - Manual (Page 157)

6-18
☛ ☛ ☛ ☛ 3.
Close the Face Up Output Tray.
If the paper jam cannot be cleared, go to the next step.
☛ ☛ ☛ ☛ 4.
Pull the Duplex Tray and Paper Cassette out of the printer.
Fig. 6-16
☛ ☛ ☛ ☛ 5.
Pull the jammed paper out of the printer.
Fig. 6-17