Chapter Ii Theory Of Operation; Electronics; General Block Diagram - Brother HL-720 - B/W Laser Printer Service Manual

CHAPTER II THEORY OF OPERATION

1.

ELECTRONICS

1.1

General Block Diagram

Fig. 2.1 shows a general block diagram of this printer.
Control system
Drum unit
Image generation system
Optional RAM (SIMM)
(max. 32Mbytes)
Expansion memory I/O
Video control block
Engine control block
Laser scanner unit
Transfer block
Developing
Drum
block
Charging
block
Toner cartridge
Fig. 2.1
Optional I/F board
(Mac. RS-232C)
Expansion I/O
Interface block
Operation block
(Operation panel)
Drive block
(Stepping motor)
Cleaner
block
II-1
Erase lamp
Paper tray unit
Paper tray
Manual feed
Fixing unit
Paper eject block
Paper feed system