Brother HL-820 Service Manual page 18

HL-1040
Fig. 2-2 shows a general block diagram of the HL-1040 printer.
Control system
Video control block
Laser scanner unit
Drum unit
Developing
block
Charging
block
Image generation system
Optional I/F board
(Mac. RS-232C)
Expansion I/O
Interface block
Engine control block
(Stepping motor)
Transfer block
Cleaner
Drum
block
Toner cartridge
Fig. 2-2
II-2
Operation block
(Operation panel)
Paper tray unit
Drive block
Paper tray
Manual feed
Fixing unit
Paper eject block
Paper feed system
Erase lamp