Canon i-SENSYS D450d Service Manual - page 43
Chapter 3
3-1
3.1 Basic Construction
3.1.1 Specifications / Control / Function List
0020-2574
i-SENSYS MF4300dn / i-SENSYS MF4350d / i-SENSYS MF4380dn / i-SENSYS MF4310/4318 / i-SENSYS MF4320d / i-SENSYS MF4330d / i-SENSYS
MF4340d / i-SENSYS D450d / i-SENSYS MF4370dn
T-3-1
3.1.2 Major Components
0020-2575
i-SENSYS MF4300dn / i-SENSYS MF4350d / i-SENSYS MF4380dn / i-SENSYS MF4310/4318 / i-SENSYS MF4320d / i-SENSYS MF4330d / i-SENSYS
MF4340d / i-SENSYS D450d / i-SENSYS MF4370dn
Followings are the major components for Document Exposure System.
- The contact sensor to scan document
- The Reader motor (M2), the drive pulley, the drive belt, to shift the contact sensor
In image scanning control, the contact sensor is shifted by rotating the Reader motor based on the drive signal from the DCNT PCB and scan the original on the
copyboard glass. When ADF is in use, image is scanned by feeding the originals by ADF instead of shifting the contact sensor.
item
function / method
document exposure
LED
document scan
Book mode: scan by the shift of the contact Book mode: scan by the shift of the contact sensor (CS)
ADF: document stream reading by fixed contact sensor (CS)
scanning resolution
600 dpi (horizontal scanner) X 600 dpi (vertical scanner)
number of gradations
256 gradations
magnification
50% to 200%
horizontal: image processing by SCNT PCB
vertical: change of carriage shift speed, image processing by SCNT PCB
lens
rod lens array
CMOS sensor
number of lines: 1 line
number of pixels: 5184 pixels as total pixels (5107 pixels as effective pixels)
maximum document scanning width: 216 mm
CS drive control
drive control by Reader motor (M2)
document size detection
none