Brother HL-5280DW

HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
2-1
CHAPTER 2 THEORY OF OPERATION
1. OVERALL
1.1 General Block Diagram
Fig. 2-1 shows a general block diagram.
Ethernet
10/100 Base TX
(HL-5250DN/
5270DN/5280DW)
Video control block
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
Exposure
drum
Charging
block
External device
Paper tray
Fuser unit
Paper eject tray
Paper feed system
Image generation system
Interface block
USB
Parallel
USB host
(HL-5280DW)
Wireless LAN
(HL-5280DW)
RAM
16MB: HL-5240
32MB: HL-5250DN/
5270DN/
5280DW
Extended RAM
SODIMM 144pin
Paper dust
cleaner block
Toner cartridge
Developing block
Developer unit
Fig. 2-1