Canon NP6412 Service Manual page 38

CHAPTER 2 BASIC OPERATION
STBY
(standby)
INTR
(initial rotation)
AER
(AE rotation)
SCFW
(scanner forward)
SCRV
(scanner reverse)
LSTR
(last rotation)
2-4
COPYRIGHT © 1999 CANON INC.
Period
• From when he power switch is turned
on to when the Copy Start key is
pressed.
• From when LSTR ends to when the
Copy Start key is pressed.
From when the Copy Start key is
pressed to when the scanner moves
forward.
While the scanner moves forward about
10 cm and then moves it in reverse.
While the scanner is moving forward.
• The distance varies according to the
selected copy size and reproduction
ratio.
• The forward speed varies according
to the selected reproduction ratio.
While the scanner is moving in reverse.
• The reverse speed is about 3.3 as fast
as the forward speed used in Direct.
From when SCRV ends to when the
main motor stops.
CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Waits until the Copy Start key is
pressed.
Removes residual charges from the
photosensitive drum, thereby ensuring
a stable drum sensitivity.
Measures the density of the original.
Illuminates the original by the scanning
lamp, and the reflected optical image is
projected to the photosensitive drum
through mirrors and lenses.
Moves the scanner to the home position
in preparation for the next copying run.
Neutralizes the drum surface potential
as post-processing.
Table 2-101
Description