Brother HL-3450CN - Manual (Page 193)

CHAPTER 7 TROUBLE SHOOTING
7-15
PAPER JAM IN THE LOWER ASSEMBLY OF THE
DUPLEX UNIT
JAM C
If a paper jam occurs in the Lower Assembly, follow these steps:
1. Open the Duplex Lower Cover.
If you find a jammed piece of
paper, remove it.
Fig. 7-6
2. If you cannot find the jammed
paper, open the Inside Unit by
holding the handles and pulling
it toward the rear. If you find a
jammed piece of paper,
remove it.
Fig. 7-7