Blanking; Outline - Canon NP6320 Service Manual

VII. BLANKING
A.

Outline

The area of the drum between the trailing edge of one copy and the leading edge of the next
would normally act as an all-black area and attract toner if a preventive measure were not taken.
This measure is to switch the primary corona OFF and the primary corona assembly grid wire bias
ON. (There is no blank exposure; see p. 4-5.)
When the copy (cassette) size is a non-default size or when the copier is in the Reduce mode,
the light from the pre-exposure lamp is directed to the photosensitive drum by way of the reflecting
plate to prevent adhesion of toner; the blank exposure shutter is moved to open the exposure slit
making use of the movement of the lens.
COPYRIGHT © 1999 CANON INC.
CHAPTER 4 IMAGE FORMATION SYSTEM
CANON NP6320 REV.0 DEC. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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