Original Exposure System; Overview - Canon imageRUNNER ADVANCE 4551i Service Manual

Original Exposure System

Overview

■ Features
● Reader Assembly
• Productivity has been increased by improving the original reading speed.
● ADF
Single pass ADF
• Low energy consumption by adopting a new Scanner Unit
• Realization of a compact Scanner Unit by adopting a new lens unit
• Increase in the supported original basis weight
• The double feed detection function added
Reversal ADF
• Improvement of quick-engaging/disengaging the Pickup roller assembly and the Separation roller
• Improvement of paper curl detection by the modification the Document length sensor
• Installation of the Document delivery Lamp function
■ Specifications
● Reader Assembly
Item
Photo conductor White high luminance LED + light guide plate
Scanning of original At copyboard reading
When Using ADF
Reading resolution Black & White: 600 dpi x 600 dpi
Color: 600 dpi x 600 dpi*
Number of gradations 256 gradations
Carriage position detec- Scanner Unit HP Sensor (PS2)
tion
Specification/Function
Scanning by moving Scanner Unit
Stream scanning of original with fixed Scanner Unit
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2. Technology
Remarks