Brother HL 2700CN - Manual (Page 146)

TROUBLESHOOTING 6 - 13
JAM D (paper jam in the lower part of the duplex unit)
If there is a paper jam in the lower part of the duplex unit, follow these steps:
1
Open the duplex back cover.
Figure 6-12
2
Remove the jammed paper by pulling it out slowly.
Figure 6-13
3
Close the duplex back cover.
JAM D