Brother DCP-8020 - Manual (Page 234)

14 - 9 TROUBLESHOOTING AND ROUTINE MAINTENANCE
8
Push the lock lever down and take the toner cartridge out of the
drum unit. Take out the jammed paper if there is any inside the
drum unit. Then put the toner cartridge back in the drum unit.
9
Put the drum unit assembly back in the DCP.
10
Put the paper tray in the DCP.
11
Close the front cover.
Paper is jammed in the duplex tray (For DCP-8025D)
1
Pull the duplex tray and paper tray out of the DCP.
2
Pull the jammed paper out of the DCP.