5-6 Functional Information
Engine Controller System
The following systems and functions are controlled by the engine
controller board:
●
DC power distribution (+3.3V DC, +5V DC, +24VA)
●
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)
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.
For more information on the LaserJet 4000 / 4050 Visit www.PrinterSupplies.com 800-551-1943
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