Blank Exposure Mechanism; Ozone Filter - Canon NP2120 Service Manual

A. Blank Exposure Mechanism
The blank exposure mechanism is used to remove
the potential from the non-image sections of the
drum in the REDUCTION mode or lo suit paper
The light from the pre-exposure lamp is reflected
by the reflecting plate and directed onto the
photosensitive drum.
The non-image section between two sheets of
bias of the primary corona unit, instead of using the
blank exposure mechanism to remove the potential
of the drum.
The fan unit is equipped with an ozone filter, which
breaks down the ozone generated by the coronas
into oxygen by catalytic action.
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C A N O N NPZlZO/ZMO R N . 0 MAY 1990 PAINTEO I N J A P A N IIMPRIME AU