CHAPTER 4 IMAGE FORMATION SYSTEM
COPYRIGHT © 1999 CANON INC. CANON NP6317 REV.0 APR. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
4-11
V. DOCUMENT DENSITY MEASUREMENT SYSTEM
A.
Outline
There is an automatic density adjustment (AE) system which adjusts the DC component of the
developing bias to suit the density of the original. If the density of the original is more or less
uniform, the AE function varies the DC component of the developing bias to suit the density of the
original, so that copies of the correct density will be made.
B.
Operation
The scanner moves forward approximately 70 mm past the leading edge of the original and
stops momentarily. The scanning lamp goes ON for approximately 1 sec, the image density is read
by the AE sensor, and the sensor output is interpreted by the DC controller. The DC controller then
adjusts the DC component of the developing bias accordingly.
Figure 4-501
Approx. 65mm
B5
A4
Approx.
30mm
Approx.
70mm
Approx.
25mm
Approx.
25mm
Approx.
28mm
B6 (reference only)
Note:
A is the position of the AE sensor
Approx.
30mm
A
Содержание NP6317
Страница 4: ......
Страница 10: ......
Страница 22: ......
Страница 24: ......
Страница 36: ......
Страница 58: ......
Страница 90: ......
Страница 112: ......
Страница 128: ......
Страница 130: ......
Страница 142: ......
Страница 144: ......
Страница 158: ......
Страница 187: ......
Страница 236: ......
Страница 238: ......
Страница 242: ......
Страница 244: ......
Страница 246: ......
Страница 248: ...0499AB0 91 1 PRINTED IN JAPAN IMPRIME AU JAPON This pubication is printed on 70 reprocessed paper ...