Chapter 3 Exposure System; Operation Overview; Overview - Canon GP160DF Service Manual

I. OPERATION OVERVIEW
A.

Overview

The image exposure system's function is to expose the document, and irradiate the
CCD with the reflected light.
The scanning lamp irradiates the document and the light from this is reflected by 4
mirrors, converged by a lens and then transmitted to the CCD. The reflected light in the
CCD is then image processed with a scanning resolution of 400 × 600pdi.
Figure 3-101 is a cross sectioned diagram of the image exposure system, and
Figure 3-102 is an external view diagram.
Mirror 2
Mirror 3
Analog processor PCB
Scanner home position
sensor (PS101)
Mirror mount 2
COPYRIGHT © 1999 CANON INC.
Scanning lamp
Mirror 1
Figure 3-101
Document scanner motor (M701)
Light-blocking plate
Backward
Figure 3-102
CANON GP160 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Copyboard glass
Forward (document scanner)
Lens
CCD light receiving unit
Forward
Mirror mount 1

CHAPTER 3 EXPOSURE SYSTEM

Mirror 4
3-1