Engine-control system The engine-control system coordinates all product functions, according to commands that the formatter sends. The engine-control system drives the laser/scanner system, the image formation system, and the pickup/feed/delivery system. The engine control system contains the following major components: ● Engine-control unit (ECU) ◦ DC controller ◦ Low-voltage power supply ● High-voltage power supply Figure 1-2 Engine-control system 6 Chapter 1 Theory of operation ENWW Formatter ENGINE CONTROL SYSTEM Engine controller DC controller Low-voltage power supply High-voltage power supply LASER SCANNER SYSTEM IMAGE-FORMATION SYSTEM MEDIA FEED SYSTEM OPTION OPTION