76 Functional information Q1860-90918
Laser and scanner drive
Based on information received from the formatter, the dc controller board sends signals to the
laser/scanner assembly to modulate the laser diode on and off and to drive the laser/scanner
motor. See “Image-formation system” on page 82 for more information.
Paper-motion monitoring and control
The dc controller board controls paper motion by continuously monitoring the various paper
sensors, and coordinating paper movement with the other print processes. For more information,
see “Paper feed system” on page 91.
Solenoids, sensors, clutches, and switches
See “Dc controller inputs and outputs” on page 252.
Engine test
See “Engine test” on page 190.
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