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

2.2.2 Power-On Sequence..................................................................................................................................................................... 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 Control ............................................................................................................................................................................... 2-3

2.3.2.1 Outline.............................................................................................................................................................................................................2-3

2.3.2.2 Image masking control ....................................................................................................................................................................................2-4

2.3.2.3 Failure detection..............................................................................................................................................................................................2-5

2.3.3 Laser Scanner Motor Control....................................................................................................................................................... 2-5

2.3.3.1 Outline.............................................................................................................................................................................................................2-5

2.3.3.2 Failure detection..............................................................................................................................................................................................2-6

2.4 IMAGE FORMATION SYSTEM .................................................................................................................................2-6

2.4.1 Overview/Configuration .............................................................................................................................................................. 2-6

2.4.1.1 Outline.............................................................................................................................................................................................................2-6

2.4.1.2 Print Process....................................................................................................................................................................................................2-7

2.4.1.3 Electrostatic latent image formation block .....................................................................................................................................................2-8

2.4.1.4 Development block .........................................................................................................................................................................................2-9

2.4.1.5 Transfer block ...............................................................................................................................................................................................2-10

2.4.1.6 Fixing block ..................................................................................................................................................................................................2-11

2.4.1.7 Cleaning block ..............................................................................................................................................................................................2-12

2.4.2 Image Stabilizaton Control ........................................................................................................................................................ 2-12

2.4.2.1 Image Stabilization Control ..........................................................................................................................................................................2-12

2.4.2.2 Environment related corrective control.........................................................................................................................................................2-12

2.4.2.3 Color gradation corrective control ................................................................................................................................................................2-13

2.4.2.4 Color Misregistration Corrective Control .....................................................................................................................................................2-14

2.4.3 Toner Cartridge .......................................................................................................................................................................... 2-16

2.4.3.1 Outline...........................................................................................................................................................................................................2-16

2.4.3.2 Memory tag ...................................................................................................................................................................................................2-17

2.4.3.3 Cartridge presence detection .........................................................................................................................................................................2-17

2.4.3.4 Developing roller engagement/disengagement control.................................................................................................................................2-17

2.4.4 Transfer Unit .............................................................................................................................................................................. 2-18

2.4.4.1 ETB Unit .......................................................................................................................................................................................................2-18

2.4.4.2 Automatic bias control ..................................................................................................................................................................................2-19

2.4.4.3 ETB cleaning.................................................................................................................................................................................................2-20

2.4.4.4 Transfer roller engagement/disengagement control......................................................................................................................................2-21

2.5 Pickup/Feeding/Delivery System.................................................................................................................................2-24

2.5.1 Overview/Configuration ............................................................................................................................................................ 2-24

2.5.1.1 Outline...........................................................................................................................................................................................................2-24

2.5.2 Other Control ............................................................................................................................................................................. 2-25

2.5.2.1 Cassette pick-up mechanism .........................................................................................................................................................................2-25

2.5.2.2 Multi-purpose tray (MPT) pick-up................................................................................................................................................................2-26

2.5.2.3 Skew correction by the registration shutter...................................................................................................................................................2-27

2.5.2.4 Transport Speed Control ...............................................................................................................................................................................2-27

2.5.2.5 Warp control..................................................................................................................................................................................................2-28

2.5.2.6 Fixing roller pressurizing/release control......................................................................................................................................................2-28

2.5.3 Detecting Jams ........................................................................................................................................................................... 2-29

2.5.3.1 Jam Detection Outline...................................................................................................................................................................................2-29

2.5.3.1.1 Outline...................................................................................................................................................................................................2-29

2.5.3.2 Delay Jams ....................................................................................................................................................................................................2-29

Contents

Table of Contents