Canon iR6570 series, Service Manual

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Contents
5.4.9 Scanner HP Sensor............................................................................................................................................... 5- 31
5.4.9.1 Removing the Reader Unit Rear Cover ................................................................................................................................. 5- 31
5.4.9.2 Removing the Mirror Base Home Position Sensor ................................................................................................................ 5- 32
5.4.10 Original Size Sensor ............................................................................................................................................ 5- 32
5.4.10.1 Removing the Copyboard Glass .......................................................................................................................................... 5- 32
5.4.10.2
Removing the CCD Unit Cover ............................................................................................................................................ 5- 33
5.4.10.3 Removing the Original Size Sensor Unit.............................................................................................................................. 5- 33
5.4.10.4 Removing the Original Size Sensor ..................................................................................................................................... 5- 34
5.4.11 Cooling Fan ......................................................................................................................................................... 5- 34
5.4.11.1
Removing the Reader Unit Rear Cover ............................................................................................................................... 5- 34
5.4.11.2 Removing the Cooling Fan................................................................................................................................................... 5- 34
5.4.12
Scanner Drive Cable............................................................................................................................................ 5- 35
5.4.12.1 Outline.................................................................................................................................................................................. 5- 35
5.4.12.2
Removing the Copyboard Glass .......................................................................................................................................... 5- 35
5.4.12.3 Removing the Right Cover (upper) ...................................................................................................................................... 5- 35
5.4.12.4 Removing the Reader Right Cover ...................................................................................................................................... 5- 35
5.4.12.5 Removing the Left Cover (upper)......................................................................................................................................... 5- 35
5.4.12.6 Removing the Reader Left Cover......................................................................................................................................... 5- 36
5.4.12.7
Removing the Reader Front Cover ...................................................................................................................................... 5- 36
5.4.12.8 Removing the Reader Unit Rear Cover ............................................................................................................................... 5- 36
5.4.12.9 Removing the ADF............................................................................................................................................................... 5- 37
5.4.12.10 Removing the Control Panel .............................................................................................................................................. 5- 37
5.4.12.11 Removing the Scanner Drive Cable ................................................................................................................................... 5- 38
5.4.12.12
Fitting the Scanner Drive Cable ......................................................................................................................................... 5- 41
5.4.12.13 Adjusting the Position of the No. 1/No. 2 Mirror Base ........................................................................................................ 5- 41
Chapter 6 Laser Exposure
6.1
Construction ...............................................................................................................................................6- 1
6.1.1
Overview.................................................................................................................................................................. 6- 1
6.1.2 Major Components .................................................................................................................................................. 6- 1
6.2 Basic Sequence..........................................................................................................................................6- 3
6.2.1 Basic Sequence of Operation (laser exposure)....................................................................................................... 6- 3
6.3 Various Controls .........................................................................................................................................6- 4
6.3.1 Controlling the Laser Activation Timing ................................................................................................................... 6- 4
6.3.1.1 Generating the Sync Signal ..................................................................................................................................................... 6- 4
6.3.1.2 Flow of the Sync Signal ........................................................................................................................................................... 6- 4
6.3.2 Controlling the Intensity of Laser Light .................................................................................................................... 6- 4
6.3.2.1
Controlling the Laser Intensity ................................................................................................................................................. 6- 4
6.3.2.2 APC Control ............................................................................................................................................................................. 6- 5
6.3.3
Controlling the Laser Scanner Motor....................................................................................................................... 6- 6
6.3.3.1 Controlling the Laser Scanner Motor ....................................................................................................................................... 6- 6
6.4 Parts Replacement Procedure ...................................................................................................................6- 7
6.4.1 Laser Scanner Unit.................................................................................................................................................. 6- 7
6.4.1.1
Removing the Laser Scanner Unit ........................................................................................................................................... 6- 7
6.4.1.2 When Replacing the Scanner Unit........................................................................................................................................... 6- 7
Chapter 7 Image Formation
7.1
Construction ...............................................................................................................................................7- 1
7.1.1
Overview.................................................................................................................................................................. 7- 1
7.1.2 Major Components .................................................................................................................................................. 7- 1
7.2 Image Formation Process ..........................................................................................................................7- 2
7.2.1 Overview.................................................................................................................................................................. 7- 2
7.3 Basic Sequence..........................................................................................................................................7- 3
7.3.1 At Power-On ............................................................................................................................................................ 7- 3
7.3.2 At Time of Printing ................................................................................................................................................... 7- 3
7.4 Potential Control .........................................................................................................................................7- 5