Pressure/Retraction Control During Acs Mode - Konica Minolta magicolor 8650 Service Manual

Theory of Operation Ver. 2.0 Nov. 2007
13.3.12

Pressure/retraction control during ACS mode

• The pressure/retraction of the 1st image transfer roller is controlled by the number of
continuous prints for the monochrome data during continuous-print cycle, so it promotes
the high productivity and extends the consumables' life.
* ACS: Auto color selection
• The 1st image transfer roller/Y, M, C is pressed against the transfer belt when the roller is
in its default position.
A. Operation
• ACS control starts counting the number of continuous-prints of the monochrome data
when switched from the color original to the monochrome data.
• When the number of continuous-prints is as specified or under
: The monochrome printing will start with color mode. (with the 1st image transfer roller /
Y/M/C being pressed)
IU (Y/M/C) does not develop or transfer the image, but it rotates when the pressed
transfer belt rotates.
The transfer belt being pressed saves time since the 1st image transfer roller does not
need to be retracted.
• When the number of continuous-prints is as specified or over.
: The monochrome printing will start when the color mode is complete and the 1st image
transfer roller /Y/M/C is retracted to be switched to the monochrome mode.
The transfer belt being retracted prevents IU to be wasted by useless rotation.
B. ACS control criteria
Paper length
216 mm or under
Over 216 mm up to 297 mm
Over 297 mm and up to 381 mm
Over 381 mm and up to 432 mm
Over 432mm and up to 457mm
Over 457 mm
Monochrome printing in color
mode
3 sheets or less
2 sheets or less
1 sheet
1 sheet
1 sheet
Switched to monochrome mode
13. Transfer corona section
Monochrome printing after
switched to monochrome mode
4 sheets or more
3 sheets or more
2 sheets or more
2 sheets or more
2 sheets or more
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