Canon iR2200 Service Manual page 88

CONTENTS
5.3 Sensors .................................. 2-24R
5.3.1 Removing the Original
Detection Unit ................. 2-24R
5.3.2 Removing the HP
Sensor ............................. 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 ..................................... 3-5R
3.2 Shading Correction .................. 3-5R
3.2.1 Outline .............................. 3-5R
3.2.2 Shading Adjustment .......... 3-6R
3.2.3 Shading Correction ........... 3-6R
3.2.4 Edge Gain Correction
(ADF in use) ..................... 3-6R
3.3 Auto Density
Adjustment (AE) ..................... 3-7R
3.3.1 Outline .............................. 3-7R
3.3.2 ABC Circuit ...................... 3-7R
3.4 Related Service Mode .............. 3-8R
4 Disassembly and Assembly ........... 3-9R
4.1 External Covers ..................... 3-10R
R 2
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5.3.3 Removing the Original
Cover Sensor .................. 2-25R
5.4 PCBs ..................................... 2-26R
5.4.1 Removing the Inverter
PCB ................................ 2-26R
4.1.1 External Covers ............... 3-10R
4.1.2 Removing the Reader
Right Cover ..................... 3-10R
4.1.3 Removing the
Copyboard Glass ............ 3-11R
4.1.4 After Mounting the
Copyboard Glass ............ 3-11R
4.2 CCDs .................................... 3-12R
4.2.1 Removing the CCD Unit . 3-12R
4.2.2 Points to Note When
Replacing the CCD Unit . 3-13R
4.3 Frames ................................... 3-14R
4.3.1 Removing the Left ADF
Base Unit ........................ 3-14R
4.3.2 Removing the Reader
Upper Frame ................... 3-14R
4.3.3 Mounting the Reader
Upper Frame ................... 3-15R
4.4 PCBs ..................................... 3-16R
4.4.1 Removing the Reader
Controller PCB ............... 3-16R
4.4.2 When Replacing the
Reader Controller PCB ... 3-16R
2000 2000 2000 2000 CANON iR2200/iR2800/iR3300 REV.0 MAR. 2001