Functional Overview
DC Controller/Power System
Print Engine Control
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Laser and Scanner Drive
Based on information received from the Formatter. the DC
Controller sends a signal to the Laser/Scanner PCA to modulate
the laser diode ON and OFF. The modulated laser beam strikes
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the surface of a rotating scarming mirror, is directed through a
focusing lens onto the Beam-to-Drum Mirror, and is then reflected
onto the photosensitive drum.
Synchronization of the process is achieved by continuous
monitoring of the beam detect signal, which is fed back to the
system from one end of the focusing lens. Refer to “Image
Formation System,” later in this chapter for more information.
Paper Motion Monitoring and Control
The DC Controller PCA controls paper motion by continuously
monitoring the various paper sensors, and coordinating the timing
with the other print processes.
For a detailed explanation of paper movement, and the interaction
of photosensors and solenoids with the paper movement process,
refer to the section “Paper Feed System,” later in this chapter.
5-5
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