2-56 Phaser 7400 Color Printer Service ManualControl PanelThe Control Panel is the primary interface to the printer’s functions and includes thedisplay, keypad, and status LED.Image Processor BoardThe Image Processor Board receives host data through the USB or Ethernet port. Thereceived data is buffered and stored, and then sent to the print engine in a rasterizedformat. The Image Processor Board connects to the Engine Control Board directly.The image processor board contains:■ Memory - RAM■ Flash DIMM■ NVRAM - Control Panel and network settings.■ Configuration Chip - determines the printer configuration.■ Optional Hard DriveEngine Control BoardThe Engine Control Board synchronizes the print process by controlling the LEDHeads, motors, fans, sensors, solenoids, clutches and Fuser temperatures. The EngineControl Board also controls the voltages to the Imaging Units and the print speed tocompensate for changes in media and environmental conditions.Major Functions:■ Communicates with the Image Processor Board■ Receives information from the sensors and/or switches.■ Generates the image based on information from the Image Processor Board.■ Controls high-voltage sent to the Imaging Unit to perform charging,development, primary and secondary transfer.■ Distributes the low-voltage DC power from the Low-Voltage Power Supply.Registration Sensor BoardLocated in the Registration Sensor Assembly, the Registration Sensor Board includesthe two sensors that monitor color registration.LED Relay BoardDistributes power from the LVPS to the four LED Heads.
