CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT © 1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-26
Figure 4-122
Figure 4-123
Reflecting
plate
Rear side
blanking lamp
Lens shift detecting shaft
Front side
blanking lamp
Reflecting
plate
(front)
,
,
A
B
Photosensitive drum
Non-image area in Reduce mode
A: Position of the side blanking lamp in Direct and Reduce mode
B: Position of the side blanking lamp in Reduce mode
B
A
H.
Controlling the Side Blanking Mechanism
1.
Outline
The machine is equipped with a side blanking lamp at the front and the rear used to prevent
adhesion of excess toner when making reduced copies.
2.
Operations
To blank out the non-image area in reduce mode, the side blanking lamp is moved in relation to
the distance over which the lens moves as detected by the lens shift detecting shaft.
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