Xerox 6250N Service Manual - Page 80

Electrical 2 1 3 4 5 6 6250-065 1. Engine Control Board: Controls printing operation based on the communication with the Image Processor Board and input from the sensors and switches. Incorporates functions of the High-Voltage Power Supply. Major Functions: ■ Communicates with the Image Processor Board ■ Receives information from the sensors and/or switches. ■ Controls the Laser Unit. ■ Supplies high-voltage to the Imaging Unit to perform charging, development, primary transfer and secondary transfer 2. Image Processor Board: Receives data from the workstation or host, rasterizes the data and passes it on to the Engine Control Board. The microprocessors on the Image Processor Board, generate the control signals used by the Engine Control Board. The system NVRAM chip is also located on this board and stores several printer parameters. 3. Motor Driver Board: Controls motors through the signals received from the Engine Control Board and sends information from the sensors and switches to the Engine Control Board. Power from the low-voltage power supply is supplied to the Engine Control Board through the Motor Driver Board. The interlock switch is mounted on the Motor Driver Board. Theory of Operation 2-41