Theory Of Operation; General Block Diagram - Brother HL 1230 - B/W Laser Printer Service Manual

CHAPTER 3

THEORY OF OPERATION

1. ELECTRONICS
1.1

General Block Diagram

HL-1230/1440
Fig. 3-1 shows a general block diagram of the HL-1230/1440 printer.
Control system
Drum unit
Image generation system
Optional RAM (SIMM)
(max. 32Mbytes)
(HL-1440 only)
Expansion memory I/O
RAM 2MB
(HL-1440 only)
Video control block
Engine control block
Laser unit
Transfer block
Charging
Drum
block
Fig. 3- 1
Developing
block
Toner cartridge
Fig. 3-1
Interface block
(HL-1230: Parallel)
(HL1440: 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