Konica Minolta bizhub C658 Service Manual page 1829

bizhub C658/C558/C458/C368/C308/C258
Printing after switched to black mode
[1]
[1] Color mode
[3] Black mode
(e) Black original specified values
• Number of multiple black originals during plain paper printing
Paper length
216 mm or less
Over 216 mm and up to 297 mm
Over 297 mm and up to 381 mm
Over 381 mm and up to 432 mm
Over 432 mm and up to 457 mm
Over 457 mm
(4) ACS mode control change with the Engine FW DipSW
• By changing the Engine FW DipSW
rollers on the ACS mode.
• When "OFF" is selected, productivity has the priority and printing is conducted with the transfer belt being pressed onto the color photo
conductors even when the specified quantity of black printing is included.
• When "ON" is selected, black printing quantity threshold until switching to K press (release of color photo conductors) becomes smaller.
• This setting is to be used when the degradation control of the color photo conductors should have priority over printing productivity.
7.3.4 1st transfer control
• To transfer the toner image formed on the surface of the PC drum onto the transfer belt, the transfer current supplied from the high voltage
unit is applied to the 1st transfer roller of each color.
[2]
[1]
[8]
[1] 1st transfer current application terminal/Y
[3] 1st transfer current application terminal/C
[5] 1st transfer roller/K
[7] 1st transfer roller/M
7.3.5 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).
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 7. 1ST
[2]
→ →
Black printing in color mode
"25" setting from "OFF (default) " to "ON", you can change the pressure control of the 1st transfer
[3]
[4]
[7]
[3]
[2] Black mode
- -
4 sheets or less
2 sheets or less
2 sheets or less
2 sheets or less
2 sheets or less
Switched to black mode
[5]
[6]
[2] 1st transfer current application terminal/M
[4] 1st transfer current application terminal/K
[6] 1st transfer roller/C
[8] 1st transfer roller/Y
O-54
TRANSFER SECTION
Black printing after switched to black mode
5 sheets or more
3 sheets or more
3 sheets or more
3 sheets or more
3 sheets or more