Brother MFC-640CW - Manual (Page 150)

13 - 7 TROUBLESHOOTING AND ROUTINE MAINTENANCE
Paper is jammed inside the machine
1
Remove the jam clear cover. Pull the jammed paper out of the
machine.
2
Close the jam clear cover.
3
Lift the scanner cover from the right-hand side of the machine
until it locks securely into the open position. Remove any
jammed paper from inside the machine.
If the paper is jammed underneath the print head, disconnect
the machine from the power source so you can move the print
head to take out the paper.
Jam Clear Cover
Scanner Cover