Engine control system The engine-control system coordinates all the other systems, according to commands from the formatter. The engine-control system contains the following components: ● DC controller PCA ● Low-voltage power supply unit ● High-voltage power supply PCA ● Fuser control Figure 1-2 Engine control system 4 Chapter 1 Theory of operation ENWW Formatter Engine control system DC controller Low-voltage power supply High-voltage power supply Fuser control Laser scanner system Image-formation system Pickup, feed and delivery system Accessory Laser scanner system Accessory