7.Detailed Descriptions 
240 
  LD (Laser Diode) 
Main Board Specifications 
  CPU: Quatro 5305-350MHz 
  Memory: 128 MB 
MF models: 
Controls overall operation of the printer, mainly: 
  SDRAM 
  Ethernet (10BASE-T/100BASE-TX) 
  USB 2.0 
  Controller I/F 
  Engine 
  Image data processing 
  LD (Laser Diode) 
  Storing address data for FAX and scanner 
Main Board Specifications 
  CPU: Quatro 5310-400MHz 
  Memory: 256 MB 
LD Drive Board 
Controls the LD (Laser Diode). 
PSU 
Supplies DC current to the machine. Also, contains the AC drive that controls the power supply to the 
fusing lamps. 
HVP 
The high voltage power supply provides power to electrical components in the machine. 
Generates the high voltage power supply required for the printing process. 
FCU (Only for Fax Models) 
Controls fax communication.