Service manual

86 Theory of operation ENWW
Engine control system
The engine control system coordinates all printer functions. It drives the laser/scanner system,
the image-formation system, and the pickup and feed system.
Figure 16. Engine control system
The engine controller PCA controls the operation sequence of the printer.
The power supply PCA contains the following components:
● fuser control circuit—regulates the heat of the fuser
● high-voltage power supply—applies biases to the primary charging roller, developing
cylinder, transfer charging roller, and fuser film
● low-voltage power supply—converts ac power to dc power for main motor, scanner motor,
fan, and solenoid function