Brother HL-1440 - Theory of Operation; General Block Diagram

CHAPTER 3 THEORY OF OPERATION
3-1
CHAPTER 3 THEORY OF OPERATION
1. ELECTRONICS
1.1 General Block Diagram
Fig. 3-1 shows a general block diagram of the HL-1230/1440 printer.
HL-1230/1440
Fig. 3- 1
Video control block
Interface block
(HL-1230: Parallel)
(HL1440: Parallel/USB)
Engine control block
Optional RAM (SIMM)
(max. 32Mbytes)
(HL-1440 only)
Operation block
(Control panel)
Control system
Low-voltage power
supply block
High-voltage power
supply block
Laser unit
Drive block
(DC motor)
Drum unit
Transfer block
Drum
Charging
block
External device
Paper tray unit
Paper cassette
Manual feed
Fixing unit
Paper eject block
Paper feed system
Image generation system
RAM 2MB
Expansion memory I/O
(HL-1440 only)
Paper dust
cleaner block
Developing
block
Toner cartridge
Fig. 3-1