Ricoh D0C8, Service Manual

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Troubleshooting for Image Quality Problems
D0CA/D0C9/D0C8/D0CB 6-136 SM
Using SP4-939-001 (ACS:Color Range), you can adjust the level of (1)
Chromatic Color Recognition for recognizing whether the original is full
color or black-and-white.
This is the SP for both copier and scanner settings, and you can adjust this setting with the
5-level scale from -2 to 2 (Default: 0).
If an original with a colored background fails to be recognized as a black-and-white original by
ACS, set the value of this SP to “-1” or “-2”.
If an original with a gray or faintly colored background fails to be recognized as a full color
original by ACS, set the value of this SP to “1” or “2”.
6.12.4 MISRECOGNITION OF 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 misrecognized as monochrome. If so,
color is not printed on the output.
Error Condition
The misrecognition 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 recognized 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 recognized as monochrome in the ACS mode.
• Colors with the "x" mark will not be printed if the document is recognized as
monochrome. The result may differ depending on the equipment status or
environment.