Brother HL-4200CN - Manual (Page 120)

6 - 5 PAPER JAMS
4
Push up button A (1) and fully open the front cover
(2). Confirm that there are no scraps of paper
remaining inside the printer.
5
Close the front cover.
6
Hold the paper tray with both hands, align it with the
opening in the printer and gently push it back in the
printer.
7
Push the paper tray completely back into the printer.
Do not use excessive force on the paper tray. Doing
so could damage the paper tray or the inside of the
printer.