14.
Cooling fan
15.
Memory panel (to upgrade your printer's memory RAM DIMM)
16.
Power cable connection
17.
Parallel interface connection
18.
LAN interface connection (only for B411dn, B431dn)
19.
USB interface connection
20.
Paper Tray extension
21.
Rear Face Up Tray extension
22.
Rear Face Up Tray
14
15
16
Printer components > 11
22
21
20
19
18
17