Brother International HL 1240 Service Manual - Page 39
Theory Of Operation
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CHAPTER 3 THEORY OF OPERATION CHAPTER3 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 Interface block (Parallel / USB) External device Low-voltage power supply block High-voltage power supply block Engine control block Operation block (Control panel) Laser unit Drive block (DC motor) Drum unit Transfer block Charging block Drum Paper dust cleaner block Developing block Toner cartridge Image generation system Paper tray unit Paper cassette Manual feed Fixing unit Paper eject block Paper feed system Fig. 3-1 3-1
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CHAPTER 3
THEORY OF OPERATION
3-1
CHAPTER3
THEORY OF OPERATION
1.
ELECTRONICS
1.1
General Block Diagram
Fig. 3-1 shows a general block diagram of the HL-1240 printer.
Video control block
Interface block
(Parallel / USB)
Engine control block
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
Paper dust
cleaner block
Developing
block
Toner cartridge
Fig. 3-1
HL-1240