Engine Controller System The following systems and functions are controlled by the engine controller board: G DC power distribution (+3.3V DC, +5V DC, +24VA) G Laser and scanner drive G Paper motion monitoring and control (photosensors and flags) G Clutches (tray pickup and Tray 1 feed) G Engine Test G Motors (main drive, scanner, and fans) The operation sequences of this printer are controlled by the CPU of this circuit. When the power switch of the printer is turned on and the printer enters the standby mode, the CPU outputs the signals to drive the loads such as Laser Diode, motors, and solenoids, based on the print commands and the image data input from the external device.
5-6 Functional Information