Engine control system
The engine control system is the brain of the printer. It controls all the other systems
according to commands from the formatter. The engine control system consists of the
following:
● DC controller PCB
● fuser power supply PCB
● high-voltage PCB
● low-voltage power supply unit
● formatter
Each of these components is described in the following sections.
Figure 5-2.
Engine control system
Note
In this manual, the abbreviation "PCB" stands for "printed circuit board assembly."
Components described as a PCB may consist of a single circuit board or a circuit board plus
other parts, such as cables and sensors.
DC controller circuit
The DC controller is responsible for controlling the print operation sequence for the printer.
The sequence of events is as follows:
1. Power is turned on.
2. The low-voltage power supply unit supplies DC power to the DC controller.
3. The CPU in the DC controller starts to control printer operations.
4. The printer enters the standby state.
5. Based on the print command and the image data input from the formatter, the CPU
sends a signal to drive the laser diode, the motors, the clutch, and the solenoids.
ENWW Engine control system 131
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