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COPYRIGHT
©
1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
4–13
CHAPTER 4 IMAGE FORMATION SYSTEM
2. Turning On the Blank Exposure Lamp in Reduce Mode
While the original is being illuminated in Reduce mode, as many LEDs (both front and rear)
as suited to the selected reduction ratio are turned on to blank out the non-image widths on the
photosensitive drum regardless of the selected paper size.
3. Turning On the Blank Exposure Lamp in Direct/Enlarge Mode
While the original is being illuminated in Direct/Enlarge mode, as many LEDs (both front
and rear) as suited to the selected paper size (Table 4-101) are turned on to blank out the non-
image widths on the photosensitive drum.
Table 4-103
4. Turning On the Blank Exposure Lamp in Multifeeder Mode
When copies are made on paper picked up from the multifeeder, the blank exposure lamp is
turned on to suit the paper width obtained by combinations of the states of the multifeeder paper
width sensors 1 and 2 (PS9, 10); see p. 5-9.
Paper size
A3, A4
279 × 432mm (11"×17"), LTR
B4, B5
A4R, A5, LGL, LTRR
B5R
A5R
1
3
5
9
13
15
1
3
5
9
13
15
LEDs (number of)
Front Rear