Brother HL-1440 Service Manual page 52

CHAPTER 3 THEORY OF OPERATION
HL-1450
Fig. 3-2 shows a general block diagram of the HL-1450 printer.
Optional RAM (SIMM)
(max. 32Mbytes)
Control system
Expansion
RAM 4MB
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
Fig. 3-2
3-2
Interface block
(Parallel/USB)
Operation block
(Control panel)
Paper tray unit
Drive block
(DC motor)
Paper cassette
Paper dust
cleaner block
Paper eject block
Paper feed system
Manual feed
Fixing unit