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DocuColor 12/DCCS50
Overview
Principles of Operation
Reissue
Overview
This machine performs three possible functions: scanning, printing and copying. As shown in
Figure 1, the sources of the image and its processing paths are different, although several
assemblies are used by more than one function. Figure 2, Figure 3 and Figure 1 show the loca-
tions of some of the assemblies related to image processing.
As shown in Fi
gu
re 1, imaging includes the following subsystems:
1. The Image Input Terminal (IIT) senses the image, converts it to a digital format and com-
pensates for differences in original document attributes.
2. The Image Processing System (IPS) converts between co
lor spaces, provides for image
editing and converts the signal from 400 dpi to 600 dpi.
3. The Image Source Selector (ISS) permits a Digital Front End (DFE) to provide a print
image to t
he following subsystems or the preceding subsystems to provide a scanned
image to the DFE.
4. The IOT Image Processing subsystem selects between inputs from the DFE and the pre-
liminary IPS, converts the image from digital f
orm
to analog form and provides the analog
signal to the Laser Diode Driver (LDD).
5. The Image Output subsystem accepts the analog drive signal and uses it to modulate the
Raster Ou
tput Scanner (ROS).
The machine can have two possible configurations: Digit
al Copier (DC) or Copier Printer (CP).
These correlate to functions and assemblies as shown in Ta b le 1 . The DC configuration cannot
perform either scanning or printing because it lacks a DFE.
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