Brother International HL 1240 Service Manual - Page 40
Fig. 3-2 shows a general block diagram of the HL-1250 printer.
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CHAPTER 3 THEORY OF OPERATION HL-1250 Fig. 3-2 shows a general block diagram of the HL-1250 printer. External device Optional RAM (SIMM) (max. 32Mbytes) Control system RAM 4MB Expansion memory I/O Optional I/F board (Mac. RS-232C) Expansion I/O Video control block Interface block (Parallel / USB) External device Low-voltage power supply block High-voltage power supply block Engine control block Operation block (Operation 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. 3-2 3-2
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CHAPTER 3
THEORY OF OPERATION
3-2
Fig. 3-2 shows a general block diagram of the HL-1250 printer.
Optional RAM (SIMM)
(max. 32Mbytes)
Optional I/F board
(Mac. RS-232C)
Expansion
memory I/O
Expansion I/O
Video control block
Engine control block
Operation block
(Operation
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
External device
Paper tray unit
Paper cassette
Manual feed
Fixing unit
Paper eject block
Paper feed system
Image generation system
Interface block
(Parallel / USB)
RAM 4MB
Paper dust
cleaner block
Developing
block
Toner cartridge
Fig. 3-2
HL-1250