Image Quality Problems; Misjudgment For Auto Color Selection (Copy/Scanner); Error Condition; Causes - Ricoh MP C2504 Field Service Manual

6. Troubleshooting

Image Quality Problems

Misjudgment for Auto Color Selection (Copy/Scanner)

In the Auto Color Selection (hereafter called ACS) mode, if copying or scanning an original on which
color is printed only on the edge, the original will be misjudged as monochrome. If so, color is not
printed on the output.

Error Condition

Copy Application
The misjudgment occurs when copying an original which has color at the edge, and that color is
printed on the output 10 mm from the edge in the ACS mode.
When using the copy application, if the original is judged as monochrome, color on the document
may not be printed on the output. When printing the standard 10 colors used in Microsoft Office
Word 2013 (an example is shown below), the following colors with the "x" mark will disappear if
the document is judged as monochrome in the ACS mode.
• Colors with the "x" mark will not be printed if the document is judged as monochrome. The
result may differ depending on the equipment status or environment.
Scanner Application
The misjudgment occurs when scanning an original which has color only 15 mm from the edge
(using the original as a standard) in the ACS mode.

Causes

In the ACS mode, the edge of the original is excluded from the judgment. Only the center part of the
original document is the target area to judge color or monochrome (in order to prevent misjudgment due
to noise).
When copying in the ACS mode, ACS judgment and the image processing equivalent to full color is
performed simultaneously. If judged as monochrome in the ACS judgment, color without a K component
will not be printed.
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