Engine control system The engine control system coordinates all printer functions and drives the other three systems. The engine control system contains the DC controller, high-voltage power-supply PCA, low-voltage power-supply unit, and fuser control. Figure 1-3 Engine control system components ENWW Engine control system 5 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 Laser scanner system Pickup, feed and delivery system