Service manual

HL-5030/5040/5050/5070N SERVICE MANUAL
3-1
CHAPTER 3 THEORY OF OPERATION
1. ELECTRONICS
1.1 General Block Diagram
Fig. 3-1 shows a general block diagram. (HL-5030/5040/5050/5070N)
RAM (DIMM)(max. 128MB)
(Option for HL-5040/5050/5070N)
Ethernet
10/100 Base TX
(HL-5070N only)
Expansion
memory I/O
PCI bus
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
Drum
Charging
block
External device
External device
Paper tray unit
Paper cassette
MP tray
(HL-5050/5070N only)
Front cover ASSY
(HL-5030/5040 only)
Fixing unit
Paper eject block
Paper feed system
Image generation system
Interface block
(Parallel / USB)
HL-5030:USB only
RAM
HL-5030:4MB
HL-5040:8MB
HL-5050:16MB
HL-5070N:16MB
Paper dust
cleaner block
Developing
block
Toner cartridge
Fig. 3-1