Chapter 3 Image Processing System - Canon iR5000 Service Manual

CONTENTS
6.2.1 Removing the Scanner
System Drive Cable ........ 2-19R
6.2.2 Routing the Scanner
Drive Cable ..................... 2-21R
6.2.3 Positioning the No. 1/2
Mirror Base ..................... 2-22R
7. Others .......................................... 2-24R

CHAPTER 3 IMAGE PROCESSING SYSTEM

1. Outline ........................................... 3-1R
2. Analog Image Processing .............. 3-2R
2.1 Outline .................................... 3-2R
2.2 Driving the CCD ..................... 3-2R
2.3 Gain Correction and Offset
Correction of the CCD Output 3-3R
2.4 A/D Conversion of the CCD
Output ..................................... 3-3R
3. Digital Image Processing ............... 3-4R
3.1 Outline ..................................... 3-4R
3.2 Shading Correction .................. 3-4R
3.2.1 Outline .............................. 3-4R
3.2.2 Shading Adjustment .......... 3-5R
3.2.3 Shading Correction ........... 3-5R
3.2.4 Edge Gain Correction
(ADF in use) ..................... 3-6R
3.3 Auto Density Adjustment
(AE) ........................................ 3-7R
R 2
COPYRIGHT © 2000 CANON INC.
7.1 Removing the Original Size
Sensor ................................... 2-24R
7.2 Removing the HP Sensor ...... 2-25R
7.3 Removing the Copyboard
Sensor ................................... 2-26R
8. PCBs ........................................... 2-27R
8.1 Removing the Fuse PCB ....... 2-27R
8.2 Removing the Inverter PCB .. 2-28R
3.3.1 Outline .............................. 3-7R
3.3.2 ABC Circuit ...................... 3-7R
3.4 Related Service Mode .............. 3-8R
4. External Covers ............................. 3-9R
4.1 Removing the Reader Front
Cover ....................................... 3-9R
4.2 Removing the Reader Rear
Cover ..................................... 3-11R
5. CCD/AP PCB ............................. 3-12R
5.1 Removing the CCD Unit ....... 3-12R
5.2 When Replacing the CCD/
AP PCB ................................ 3-13R
6. Reader Controller PCB ................ 3-14R
6.1 Removing the Reader
Controller PCB ...................... 3-14R
6.2 When Replacing the Reader
Controller PCB ...................... 3-14R
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000