Contents
Contents
7.1 Construction ...................................................................................................................................................................7-1
7.1.1 Outline.......................................................................................................................................................................................... 7-1
7.1.2 Major Components....................................................................................................................................................................... 7-1
7.1.3 Pre-Transfer Exposure LED ........................................................................................................................................................ 7-2
7.2 Image Formation Process...............................................................................................................................................7-2
7.2.1 Overview...................................................................................................................................................................................... 7-2
7.3 Basic Sequence ..............................................................................................................................................................7-3
7.3.1 Basic Sequence ............................................................................................................................................................................ 7-3
7.4 Potential Control ............................................................................................................................................................7-3
7.4.1 Outline.......................................................................................................................................................................................... 7-3
7.4.2 Basics Sequence of Operations .................................................................................................................................................... 7-4
7.4.3 Determining the Optimum Grid Bias........................................................................................................................................... 7-5
7.4.4 Grid Bias Corrective Control ....................................................................................................................................................... 7-6
7.4.5 Determining the Optimum Laser Output ..................................................................................................................................... 7-6
7.4.6 Laser Output Corrective Control ................................................................................................................................................. 7-7
7.4.7 Determining the Optimum Developing Bias ............................................................................................................................... 7-7
7.4.8 Potential Control for Transparency Mode ................................................................................................................................... 7-8
7.4.9 Target Potential Correction in Each Mode .................................................................................................................................. 7-9
7.5 Charging Mechanism ...................................................................................................................................................7-11
7.5.1 Primary Charging Mechanism ................................................................................................................................................... 7-11
7.5.1.1 Outline...........................................................................................................................................................................................................7-11
7.5.1.2 Primary Charging Assembly Cleaning Mechanism ......................................................................................................................................7-12
7.5.1.3 Others ............................................................................................................................................................................................................7-13
7.5.2 Dust-Collecting Roller Bias ....................................................................................................................................................... 7-13
7.5.2.1 Outline...........................................................................................................................................................................................................7-13
7.5.3 Pre-Transfer Charging Mechanism............................................................................................................................................ 7-14
7.5.3.1 Outline...........................................................................................................................................................................................................7-14
7.5.3.2 Controlling the Output to Suit the Environment (fuzzy control) ..................................................................................................................7-15
7.5.3.3 Pre-Transfer Charging Assembly Cleaning Mechanism...............................................................................................................................7-16
7.5.3.4 Others ............................................................................................................................................................................................................7-16
7.6 Drum Cleaner Unit.......................................................................................................................................................7-17
7.6.1 Outline........................................................................................................................................................................................ 7-17
7.6.2 Detecting the Waste Toner (case full condition) ....................................................................................................................... 7-17
7.7 Developing Assembly ..................................................................................................................................................7-18
7.7.1 Outline........................................................................................................................................................................................ 7-18
7.7.2 Controlling the Developing Assembly....................................................................................................................................... 7-19
7.7.3 Controlling the Toner Cartridge Drive Mechanism................................................................................................................... 7-20
7.7.4 Controlling the Developing Bias ............................................................................................................................................... 7-21
7.7.5 Detecting the Toner Level and Controlling the Toner Supply Mechanism............................................................................... 7-22
7.8 Transfer Mechanism ....................................................................................................................................................7-25
7.8.1 Transfer Guide Bias ................................................................................................................................................................... 7-25
7.8.1.1 Overview .......................................................................................................................................................................................................7-25
7.8.1.2 Controlling the Output to Suit the Environment ...........................................................................................................................................7-26
7.8.2 Transfer Charging Mechanism .................................................................................................................................................. 7-26
7.8.2.1 Outline...........................................................................................................................................................................................................7-26
7.8.2.2 Controlling the Output to Suit the Environment (fuzzy control) ..................................................................................................................7-27
7.8.2.3 Correcting the Output at the Trailing Edge of Paper ....................................................................................................................................7-28
7.8.2.4 Transfer Charging Assembly Cleaning Mechanism .....................................................................................................................................7-28
7.8.2.5 Others ............................................................................................................................................................................................................7-29
7.9 Separation Mechanism .................................................................................................................................................7-29
7.9.1 Separation Charging Mechanism ............................................................................................................................................... 7-29
Summary of Contents for iR7086
Page 1: ...Sep 7 2007 Service Manual iR7105 7095 7086 Series...
Page 2: ......
Page 6: ......
Page 26: ...Contents...
Page 27: ...Chapter 1 Introduction...
Page 28: ......
Page 30: ......
Page 32: ...Chapter 1 1 2 Not all products are necessarily available in all sales areas...
Page 55: ...Chapter 2 Installation...
Page 56: ......
Page 150: ......
Page 151: ...Chapter 3 Basic Operation...
Page 152: ......
Page 154: ......
Page 159: ...Chapter 4 Main Controller...
Page 160: ......
Page 162: ......
Page 183: ...Chapter 5 Original Exposure System...
Page 184: ......
Page 228: ......
Page 229: ...Chapter 6 Laser Exposure...
Page 230: ......
Page 232: ......
Page 238: ...Chapter 6 6 6 F 6 7 1 Laser light 2 Laser shutter 1 2 1 2 2 1...
Page 240: ......
Page 241: ...Chapter 7 Image Formation...
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Page 295: ...Chapter 8 Pickup Feeding System...
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Page 353: ...Chapter 9 Fixing System...
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Page 379: ...Chapter 10 External and Controls...
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Page 394: ...Chapter 10 10 10 F 10 7...
Page 417: ...Chapter 11 MEAP...
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Page 467: ...Chapter 12 RDS...
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Page 479: ...Chapter 13 Maintenance and Inspection...
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Page 497: ...Chapter 14 Standards and Adjustments...
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Page 527: ...Chapter 15 Correcting Faulty Images...
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Page 561: ...Chapter 16 Self Diagnosis...
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Page 585: ...Chapter 17 Service Mode...
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Page 588: ...Contents 17 8 1 1 COPIER Items 17 94...
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Page 689: ...Chapter 18 Upgrading...
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Page 696: ...Chapter 18 18 4...
Page 713: ...Chapter 18 18 22 formatting and download the system software once again...
Page 726: ...Chapter 19 Service Tools...
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Page 734: ...Sep 7 2007...
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