Engine controller system The following systems and functions are controlled by the engine controller board: ! DC power distribution (+3.3 V DC, +5 V DC, +24 VA) ! Laser and scanner drive ! Paper-motion monitoring and control (photosensors and flags) ! Clutches (tray pickup and tray 1 feed) ! Engine test ! Motors (main drive, scanner, and fans) Printer operations are controlled by the CPU on the engine controller board. When you press the power button, the printer enters standby mode until it receives a print command or image data. The CPU then sends the signals to drive internal components, such as laser diodes, motors, and solenoids. Figure 11.
Engine controller board EN Chapter 5 Theory of operation 95