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bizhub C4000i/C3300i
When printing in black with color mode (effecting black printing with the four PC drums rotating)
[1]
[1]
Color mode
[3]
Color mode
Printing after switched to black mode
[1]
[1]
Color mode
[3]
Black mode
(d) ACS mode control change with the Engine FW dip SW
• By changing the engine FW dip SW setting, you can change the pressure control of the 1st transfer rollers in ACS mode.
• When the Engine FW Dip SW "25" is set to "1", the 1st transfer roller's default position is changed to the "black mode (retracted
position)." (When the setting is "0", the default position of the 1st transfer roller/Y, M, C is at the color mode (pressed position).)
• For users who mainly produce black prints, when "1" is selected, the 1st transfer roller/Y, M, C can be at the retracted position more
frequently, which helps to reduce the wearing out of photoconductors caused by unnecessary rotation of color imaging units. The
disadvantage of the setting is that the first copy time becomes longer for color print as the 1st transfer roller/Y, M, C is moved from the
color mode to the black mode. Reduced productivity of the multi-print cycle could result depending on the condition.
(4) 1st transfer control
• To transfer the toner image formed on the surface of the photoconductor onto the transfer belt, the transfer current supplied from the high
voltage unit is applied to the 1st transfer roller of each color.
[5]
[4]
[1]
1st transfer voltage application terminal
[3]
1st transfer roller/C
[5]
1st transfer roller/Y
(5) Transfer belt cleaning
• The toner image on the surface of the transfer belt is transferred onto the paper. (2nd transfer)
• Part of the toner image is left on the surface of the transfer belt after the 2nd transfer. A cleaning blade is provided on the transfer belt. It
functions to remove the residual toner (waste toner).
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[3]
P THEORY OF OPERATION > 1. bizhub C4000i/C3300i
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[2]
Color mode
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[3]
[2]
Black mode
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[1]
[2]
[2]
1st transfer roller/K
[4]
1st transfer roller/M
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P-24
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