Chapter 3 Theory Of Operation; Electronics; General Block Diagram - Brother HL 1240 - B/W Laser Printer Service Manual

CHAPTER 3 THEORY OF OPERATION
1.

ELECTRONICS

1.1

General Block Diagram

HL-1240
Fig. 3-1 shows a general block diagram of the HL-1240 printer.
Control system
RAM 2MB
Video control block
Engine control block
Laser unit
Drum unit
Transfer block
Charging
Drum
block
Developing
block
Toner cartridge
Image generation system
Fig. 3-1
Interface block
(Parallel / USB)
Operation block
(Control panel)
Drive block
(DC motor)
Paper dust
cleaner block
3-1

CHAPTER 3 THEORY OF OPERATION

Paper tray unit
Paper cassette
Manual feed
Fixing unit
Paper eject block
Paper feed system