Corona Unit Ventilation - Ricoh FW780 Service Manual

2.3 CORONA UNIT VENTILATION

[A]
If ozone produced by the corona charge stays in the charge corona area, it may
cause uneven corona charging to the drum. To prevent this, ozone is vacuumed
out through the exhaust fan [A], and changed to oxygen by the ozone filter before
being blown out of the copier.
A163 2-5 SM