Acs Control - Develop QC 2235 Plus Service Manual

Transfer Corona section
10.3.10

ACS control

• This machine adopts ACS control, which controls switching of the print mode according
to the number of the continuous monochrome originals to achieve both a higher copying
productivity and longer service life of the consumables. This control functions in the ACS
mode only. (ACS: Auto Color Selection)
• In the ACS control, the number of the continuous monochrome originals is checked when
the color originals are switched to the monochrome ones. If the number of the continuous
monochrome originals is less than a predetermined value, monochrome printing is made
in the color mode. If, however, the number of the continuous monochrome originals is the
predetermined value or more, the print mode is switched to monochrome since the time
wasted for PC Drum rotation is larger than the time loss required for switching to the
monochrome mode.
• The ACS control does not function until the number of the continuous monochrome orig-
inals has been counted. Accordingly, ACS control is provided only within the range of the
number of the originals scanned for the first set of copies. This will result in ACS control
not necessarily functioning at the optimum performance.
• This function works most effectively in the following conditions:
For the 2nd set of copies onward in electronic sorting
Printing using job programs
Multiple Enlargement mode
(that involves ACS detection processing made at the end of the prescan)
Paper Size Effecting monochrome printing in color mode
A4/Letter
A4R/Letter R
B4/11 × 14
A3/11 × 17
Effecting monochrome printing in color mode
(effecting monochrome printing with the four PC Drums rotating)
Color print
Switching to monochrome mode
Color print
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
3 sheets or less
2 sheets or less
2 sheets or less
1 sheet or less
Monochrome print
PC Drum/Y
Monochrome print
2-46
Switching to monochrome mode
4 sheets or more
3 sheets or more
3 sheets or more
2 sheets or more
Color print
PC Drum/Bk
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