Engine control system The engine control system consists of the engine controller PCB and the power supply assembly. The engine controller PCB coordinates all print engine activities. The figure below illustrates the block diagram of this system, and the description of each subsystem follows. Engine controller PCB Sensors Solenoids Main motor Reverse motor Power supply PCB Cooling fan Options Beam detection Scanner motor Formatter Laser/ scanner driver Figure 37. Engine control system The engine control system directly controls the following subsystems:
laser/scanner control paper-feed control microswitch control motor control fuser-assembly control power supply and control C7058-90936 Printer functionality and operation 77 Reset IC901 Fan motor /RSTX IC control /BDI Fan motor Fan motor control /BDI control