Engine Control System The engine control system shown in figure 5-5 consists of the Engine Controller Assembly and the Intermediate PCB. The Engine Controller Assembly coordinates all print engine activities. Figure 5-5 Engine Control System Specifically, the Engine Control System directly controls the following subsystems contained on the Engine Controller Assembly: • Laser Scanner Control • Paper Feed Control • Microswitch Control • Motor Control • Fusing Assembly Control • Power Supply and Control C4170-90959 Engine Control System 77