Chapter Ii Theory Of Operation; Electronics; General Block Diagram - Brother HL-820 Service Manual

CHAPTER II THEORY OF OPERATION

1.

ELECTRONICS

1.1

General Block Diagram

HL-820/1020
Fig. 2-1 shows a general block diagram of the HL-820/1020 printer.
Control system
Drum unit
Developing
Image generation system
Video control block
Engine control block
Laser scanner unit
Transfer block
Drum
block
Charging
block
Toner cartridge
Interface block
Operation block
(Operation panel)
Drive block
(Stepping motor)
Cleaner
block
Fig. 2-1
II-1
Erase lamp
Paper tray unit
Paper tray
Manual feed
Fixing unit
Paper eject block
Paper feed system