Konica Minolta bizhub C250 Service Manual page 157

24. Other control
24.1.2 Operation
A. Function
Motor name
Power supply cooling fan
motor/1 (M8)
Power supply cooling fan
motor/2 (M9)
Ozone ventilation fan
motor (M14)
Fusing cooling fan motor/
1 (M13)
Fusing cooling fan motor/
2 (M11)
Suction fan motor (M10)
cooling fan motor/1 (M12)
Cooling fan motor/2 (M22)
Scanner cooling fan motor
(M202)
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It exhausts the accumulated heat inside the unit in order to prevent temper-
ature from increasing at DC power supply part and the controller part.
• It exhausts the accumulated heat inside the DC power supply box in
order to avoid temperature increase at DC power supply part.
• A dust filter/cooling fan are mounted inside the ventilation duct in order to
remove dust power supply cooling fan motor/2 sucked with the air inside
the unit.
• A white belt may occur on the image because of the lower sensitivity of
the PC drum due to ozone accumulated around the PC drum charge
corona. In order to avoid this trouble, ozone filter removes the ozone
inside the PC drum charge corona to keep the sensitivity of the PC drum.
• Ozone accumulated around PC drum charge corona will be absorbed by
Ozone filter and be removed.
• Odor accumulated between TC part and fusing part is absorbed by the
odor filter to be removed.
• In order to keep the temperature between TC part and fusing part as well
as motor part, heat accumulated inside the unit will be exhausted.
When the paper with toner heated at fusing part exit while still at high tem-
perature, toner may be transferred to other paper on the exit tray.
In order to avoid this, air is applied to cool the toner and paper.
• Paper will be sucked between 2nd transfer part and fusing part, so it will
have a stable behavior and go smoothly into the fusing roller.
The air inside will be exhausted outside the unit.
• A dust filter/vertical transfer are mounted inside the ventilation duct in
order to remove dust the suction fan sucked with the air inside the unit.
Heat accumulated inside the unit will be discharged in order to avoid tem-
perature increase, etc., inside the transfer part (transfer belt, transfer
clutch.)
Heat accumulated inside the unit will be discharged in order to avoid tem-
perature increase, etc., of the upper part inside the board box as well as
around the color PC motor.
Heat accumulated inside the IR part will be discharged in order to avoid
temperature increase, etc., at the scanner part.
Theory of operation ver. 3.0 Aug. 2006
Control conditions