Ozone Filter - Konica Minolta BizHub C360 Service Manual

10. PHOTO CONDUCTOR SECTION
10.3.8

Ozone filter

• A high voltage DC negative charge is applied to the comb electrode and charge corona
control plate (grid mesh) inside the charge corona. Charge discharged from the comb
electrode causes the surface of the photo conductor to become uniformly charged via
the charge corona control plate. (Charge corona control)
• The comb electrode generates ozone as it discharges.
When the photo conductor is exposed to a predetermined amount of ozone for a prede-
termined period of time, the sensitivity of the surface of the photo conductor becomes no
longer uniform, resulting in uneven sensitivity. Uneven sensitivity on the surface of the
photo conductor results in white bands or other print image defects.
• To prevent the photo conductor from developing the uneven sensitivity problem, the
exhaust fan motor is provided with an ozone filter that removes ozone from the area
around the photo conductor.
Exhaust fan motor (FM3)
Ozone filter
A. Exhaust path
• Air is drawn through the air inlet port disposed at the front side of the photo conductor
charge corona.
• The air that contains ozone in it flows through the path near the comb electrode and is
discharged from the air exhaust port located at the back side of the photo conductor
charge corona into the exhaust duct.
• The air containing ozone flows through the exhaust duct. The ozone filter located at the
distal end of the exhaust duct decomposes the ozone in the exhaust into oxygen.
• The air, which is now harmless, is discharged out of the machine.
B. Exhaust fan motor rotation start timing
• The exhaust fan motor rotates at full speed under any of the following conditions:
"During a print cycle"
"During predrive after the power is turned ON"
"During execution of image stabilization control"
C. Exhaust fan motor rotation stop timing
• The exhaust fan motor stops rotating five seconds after it has started rotating.
60
Air exhaust port
Exhaust duct
Air inlet port
Theory of Operation Ver. 1.0 Jul. 2009
Exhaust path
A0EDT2C020DA