Overview - Xerox DocuColor 12/DCCS50 Service Manual

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.
tions of some of the assemblies related to image processing.
As shown in Figure 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 color 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 the 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 form 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 Output Scanner (ROS).
The machine can have two possible configurations: Digital Copier (DC) or Copier Printer (CP).
These correlate to functions and assemblies as shown in
perform either scanning or printing because it lacks a DFE.
Reissue
DocuColor 12/DCCS50
Figure 2, Figure 3 and Figure 1 show the loca-
Table 1. The DC configuration cannot
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Principles of Operation
Overview