Konica Minolta bizhub C658 Service Manual page 1806

bizhub C658/C558/C458/C368/C308/C258
4.3.5 Charging roller cleaning
• If the charging roller becomes contaminated, the surface of the photo conductor can no longer be charged uniformly, so that uneven charge
occurs. Uneven charge of the photo conductor results in irregular streaks or other print image defects.
• The cleaning roller rotates by following the rotation of the charging roller, continuously cleaning contamination from the charging roller
surface.
[1]
[2]
[1] Photo conductor
[3] Cleaning roller
4.3.6 Drum unit detection
The drum unit of each color of toner is provided with a DC set board. The board detects set of the corresponding drum unit.
[1] Drum unit
NOTE
▪ For the life of the unit, refer to
replacement time (bizhub
(1) Unit mounting detection
(a) Detection timing
• The unit mounting detection control is performed under any of the following conditions:
"The power switch is turned ON (with the front door and right door are closed)"
"The front door or right door is opened and closed with the power switch in ON position"
(b) Operation when it is detected that no units are mounted
• The message "Drum Unit Installation Error" appears on the control panel and the machine prohibits initiation of any new print cycle.
The message "Drum Unit Installation Error" disappears as soon as a drum unit is mounted.
(2) New article detection
(a) Detection timing
• The new article detection control is performed if it is determined through the "unit mounting detection" control that the drum unit is
correctly mounted in place.
(b) Operation when the drum unit is determined not to be new
• The new article detection control is terminated.
(c) Operation when the drum unit is determined to be new
• The life counter of the drum unit is reset to zero and the control proceeds to the life detection control.
O THEORY OF OPERATION bizhub C658/C558/C458/C368/C308/C258 > 4. PHOTO
[3]
[1]
[2]
F.6.1 Consumable/part replacement time (bizhub C368/C308/C258)
C658/C558/C458).
[2] Charging roller
- -
[2] DC set board
O-31
CONDUCTOR SECTION
and F.6.2 Consumable/part