Canon I-Sensys LBP5050, Руководство по обслуживанию

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Contents
Contents
2.1 Functional Configuration ...............................................................................................................................................2-1
2.1.1 Outline.......................................................................................................................................................................................... 2-1
2.2 Basic Sequense...............................................................................................................................................................2-1
2.2.1 Basic Sequence of Operation ....................................................................................................................................................... 2-1
2.3 LASER EXPOSURE SYSTEM.....................................................................................................................................2-2
2.3.1 Overview/Configuration .............................................................................................................................................................. 2-2
2.3.1.1 Outline.............................................................................................................................................................................................................2-2
2.3.2 Laser Scanner Motor Control....................................................................................................................................................... 2-2
2.3.2.1 Fault Detection ................................................................................................................................................................................................2-2
2.4 IMAGE FORMATION SYSTEM .................................................................................................................................2-3
2.4.1 Overview/Configuration .............................................................................................................................................................. 2-3
2.4.1.1 Outline.............................................................................................................................................................................................................2-3
2.4.1.2 Image-formation Process ................................................................................................................................................................................2-3
2.4.1.3 Latent image formation block .........................................................................................................................................................................2-4
2.4.1.4 Development block .........................................................................................................................................................................................2-4
2.4.1.5 Transfer block .................................................................................................................................................................................................2-5
2.4.1.6 Fixing block ....................................................................................................................................................................................................2-6
2.4.1.7 ITB cleaning block ..........................................................................................................................................................................................2-6
2.4.1.8 Photosensitive drum cleaning block................................................................................................................................................................2-7
2.4.2 High-Voltage Control .................................................................................................................................................................. 2-7
2.4.2.1 Outline.............................................................................................................................................................................................................2-7
2.4.3 Image Stabilizaton Control .......................................................................................................................................................... 2-8
2.4.3.1 Overview of the Image Stabilization Control Mechanism..............................................................................................................................2-8
2.4.3.2 Image density correction control (D-max control)..........................................................................................................................................2-8
2.4.3.3 Image gradation correction control (D-half control).......................................................................................................................................2-9
2.4.3.4 Color displacement correction control ............................................................................................................................................................2-9
2.4.4 Toner Cartridge ............................................................................................................................................................................ 2-9
2.4.4.1 Developing roller engagement/disengagement control...................................................................................................................................2-9
2.4.5 Transfer Unit ................................................................................................................................................................................ 2-9
2.4.5.1 Pad transfer......................................................................................................................................................................................................2-9
2.5 Pickup/Feeding/Delivery System.................................................................................................................................2-10
2.5.1 Overview/Configuration ............................................................................................................................................................ 2-10
2.5.1.1 Outline...........................................................................................................................................................................................................2-10
2.5.2 Detecting Jams ........................................................................................................................................................................... 2-11
2.5.2.1 Jam Detection Outline...................................................................................................................................................................................2-11
2.5.2.1.1 Outline...................................................................................................................................................................................................2-11
2.5.2.2 Delay Jams ....................................................................................................................................................................................................2-11
2.5.2.2.1 Paper delay JAM ...................................................................................................................................................................................2-11
2.5.2.2.2 Fixing delay JAM..................................................................................................................................................................................2-11
2.5.2.3 Stationary Jams .............................................................................................................................................................................................2-11
2.5.2.3.1 Pickup residual JAM .............................................................................................................................................................................2-11
2.5.2.3.2 Fixing Stationary Jam ...........................................................................................................................................................................2-11
2.5.2.4 Other Jams.....................................................................................................................................................................................................2-11
2.5.2.4.1 Fixing winding JAM .............................................................................................................................................................................2-11
2.5.2.4.2 In-body residual JAM............................................................................................................................................................................2-11
2.5.2.4.3 Door open JAM.....................................................................................................................................................................................2-11
2.5.3 Cassette Pickup .......................................................................................................................................................................... 2-12
2.5.3.1 Separation Roller Method .............................................................................................................................................................................2-12
2.6 FIXING UNIT SYSTEM.............................................................................................................................................2-12
2.6.1 Overview/Configuration ............................................................................................................................................................ 2-12
2.6.1.1 Outline...........................................................................................................................................................................................................2-12
2.6.2 Various Control Mechanisms .................................................................................................................................................... 2-13
2.6.2.1 Controlling the Speed of the Fixing Unit ......................................................................................................................................................2-13