Canon MF720 Series, Руководство по обслуживанию, Страница: 30 / 327

Document Exposure/Feeder System
Document Exposure System
■ Overview
Specifications / Control / Function List
Item Function / Method
Document Exposure LED
Document Scan Book Mode:
• Scan by the shift of the contact sensor (CIS)
ADF:
• Document stream reading by fixed contact sensor (CIS)
Scanning Resolution Color:
• 600 dpi (horizontal scanning) x 600 dpi (vertical scanning)
• 300 dpi (horizontal scanning) x 600 dpi (vertical scanning)
• 300 dpi (horizontal scanning) x 300 dpi (vertical scanning)
Black and White:
• 600 dpi (horizontal scanning) x 600 dpi (vertical scanning)
• 300 dpi (horizontal scanning) x 600 dpi (vertical scanning)
Number of Gradations 256 Gradations
Magnification 25% to 400%
Horizontal scanning direction: Image processing by the Main Controller PCB
Vertical scanning direction: The speed at which the carriage moves and image processing by the Main
Controller PCB
Lens CIS/Color
CIS Number of lines: 1 line
Number of pixels: 5184 pixels as total pixels (5107 pixels as effective pixels)
Maximum document scanning width: 216mm
CIS Drive Control Drive Control by Reader Motor (M720)
Document Size Detection None
Dirt Sensor Detection None
■ Major Components
Followings are the major components for Document Exposure System.
• The contact sensor to scan document.
• The Reader motor (M720), 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 Main
Controller 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.
Drive Belt
Drive Pulley
Drive Pulley Contact Image Sensor (CIS)
Reader Motor
(M720)
2. Technical Explanation
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