Brother DCP-4020C - Manual (Page 206)

TROUBLESHOOTING AND ROUTINE MAINTENANCE 15 - 5
Paper is jammed inside the DCP.
1
Open the scanner cover by releasing the scanner cover release
lever and lifting the scanner cover.
2
Remove the jammed paper.
3
Close the scanner cover.
WARNING
Do not touch the ink tube because it can cause damage to the
machine itself.
Scanner Cover
Scanner Cover
Release Lever
Ink Tube