Brother HL-4200CN - Manual (Page 151)

ROUTINE MAINTENANCE AND CONSUMABLE REPLACEMENT 7 - 25
6
Insert the cardboard spacers in the tray as
illustrated.
7
Hold the paper tray with both hands, align it with the
opening in the printer and gently push it in to the
printer.
8
Push the paper tray completely back into the printer.
9
Push up button A (1) and fully open the front cover
(2).