Canon iR2020 Series Service Manual

Contents
4.4.5 Copyboard Cover Open/Close Sensor ..................................................................................................................4- 24
4.4.5.1 Removing the Rear Cover ..................................................................................................................................................... 4- 24
4.4.5.2 Removing the Right Cover (Lower)........................................................................................................................................ 4- 24
4.4.5.3 Removing the Right Cover (Upper)........................................................................................................................................ 4- 24
4.4.5.4 Removing the Left Cover (Rear) ............................................................................................................................................ 4- 24
4.4.5.5 Removing the Reader Rear Cover......................................................................................................................................... 4- 24
4.4.5.6 Removing the Copyboard Cover Open/Close Sensor (Front/Rear)....................................................................................... 4- 25
4.4.6 Contact Sensor HP Sensor ...................................................................................................................................4- 25
4.4.6.1 Removing the Copyboard glass............................................................................................................................................. 4- 25
4.4.6.2 Removing the ADF Reading Glass ........................................................................................................................................ 4- 25
4.4.6.3 Removing the Contact Sensor HP Sensor............................................................................................................................. 4- 26
4.4.7 Original Size Sensor..............................................................................................................................................4- 26
4.4.7.1 Removing the Copyboard glass (iR2020/iR2020J/iR2020i)................................................................................................... 4- 26
4.4.7.2 Removing the Original Sensor (Vertical Scan Direction) (iR2020/iR2020J/iR2020i) ............................................................. 4- 27
4.4.7.3 Removing the Original Sensor (Horizontal Scan Direction) (iR2020/iR2020J/iR2020i) ......................................................... 4- 27
4.4.8 Reader Heater (option)..........................................................................................................................................4- 28
4.4.8.1 Removing the Copyboard glass............................................................................................................................................. 4- 28
4.4.8.2 Removing the Reader Heater (Right) .................................................................................................................................... 4- 28
4.4.8.3 Removing the Reader Front Cover ........................................................................................................................................ 4- 29
4.4.8.4 Removing the ADF Reading Glass ........................................................................................................................................ 4- 29
4.4.8.5 Removing the Reader Heater (Left)....................................................................................................................................... 4- 29
Chapter 5 Laser Exposure
5.1 Construction ...............................................................................................................................................5- 1
5.1.1 Overview..................................................................................................................................................................5- 1
5.1.2 Specifications and Control Mechanism ...................................................................................................................5- 1
5.1.3 Specifications and Control Mechanism ...................................................................................................................5- 1
5.1.4 Main Components ...................................................................................................................................................5- 1
5.1.5 Control System Configuration..................................................................................................................................5- 2
5.2 Various Controls .........................................................................................................................................5- 3
5.2.1 Controlling the Laser Activation Timing ................................................................................................................... 5- 3
5.2.1.1 Laser Emission ON/OFF Control ............................................................................................................................................. 5- 3
5.2.1.2 Laser Emission ON/OFF Control ............................................................................................................................................. 5- 3
5.2.1.3 Horizontal Synchronization Control.......................................................................................................................................... 5- 4
5.2.1.4 Horizontal Synchronization Control.......................................................................................................................................... 5- 4
5.2.2 Controlling the Intensity of Laser Light ....................................................................................................................5- 4
5.2.2.1 Automatic Photocurrent Control (APC) .................................................................................................................................... 5- 4
5.2.3 Controlling the Laser Scanner Motor.......................................................................................................................5- 4
5.2.3.1 Laser Scanner Motor Control................................................................................................................................................... 5- 4
5.2.4 Controlling the Laser Shutter...................................................................................................................................5- 5
5.2.4.1 Laser Shutter Control............................................................................................................................................................... 5- 5
5.3 Parts Replacement Procedure ...................................................................................................................5- 7
5.3.1 Laser Scanner Unit..................................................................................................................................................5- 7
5.3.1.1 Removing the Rear Cover ....................................................................................................................................................... 5- 7
5.3.1.2 Removing the Right Cover (Lower).......................................................................................................................................... 5- 7
5.3.1.3 Removing the Delivery Tray..................................................................................................................................................... 5- 7
5.3.1.4 Removing the Laser Scanner Unit ........................................................................................................................................... 5- 7
Chapter 6 Image Formation
6.1 Construction ...............................................................................................................................................6- 1
6.1.1 Specifications of Image Formation System .............................................................................................................6- 1
6.1.2 Major Components of Image Formation System .....................................................................................................6- 1
6.2 Image Formation Process ..........................................................................................................................6- 1
6.2.1 Image Formation Process .......................................................................................................................................6- 1
6.3 Basic Sequence..........................................................................................................................................6- 2
6.3.1 Basic Sequence of Operation.................................................................................................................................. 6- 2
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Canon iR2020 Series Specifications

General

Print Technology	Laser
Copy Resolution	600 x 600 dpi
Scan Resolution	600 x 600 dpi
Network Ready	Optional
Print Speed	20 ppm
Resolution	600 x 600 dpi
Duplex Printing	Optional
Connectivity	USB 2.0
Type	Monochrome
Paper Size	A4, A5, B5
Copy Speed	20 cpm
Multiple Copy	Up to 99 copies
Scan Speed	20 ipm
Warm-up Time	Less than 15 seconds
First Print Time	Less than 10 seconds
Paper Input	250 sheets
First Copy Time	Less than 10 seconds