Brother hl 1650 - B/W Laser Printer Service Manual page 73

Optional RAM (DIMM)
(max. 128Mbytes)
Control system
Expansion
RAM 8MB
memory I/O
Video control block
Engine control block
Laser unit
Drum unit
Transfer block
Charging
Drum
block
Developing
block
Toner cartridge
Image generation system
Network board
(Standard for HL-1670N
Option for HL-1650)
Ethernet
10/100 Base TX
PCI bus
Interface block
(Parallel / USB)
Operation block
(Control panel)
Drive block
(DC motor)
Paper dust
cleaner block
Duplex
printing unit
Paper feed system
+/1 6(59,&( 0$18$/
Paper tray unit
Paper cassette
MP tray
Fixing unit
Paper eject block