1.1 Outline of printing process ................................................................................................................ 6 - 1

1.2 Summarized diagram of overall printing processes .......................................................................... 6 - 2

1.3 Technical explanation of printing processes ..................................................................................... 6 - 3

1.3.1 Charge ...................................................................................................................................... 6 - 3

1.3.2 Exposure................................................................................................................................... 6 - 4

1.3.3 Development............................................................................................................................. 6 - 6

1.3.4 1st transfer (drum to belt).......................................................................................................... 6 - 8

1.3.5 Clean (drum) ............................................................................................................................. 6 - 9

1.3.6 Repeating (Forming complete toner image) ............................................................................. 6 - 9

1.3.7 2nd transfer (belt to paper) ..................................................................................................... 6 - 11

1.3.8 Neutralization .......................................................................................................................... 6 - 13

1.3.9 Cleaning.................................................................................................................................. 6 - 13

1.3.10 Fixing .................................................................................................................................... 6 - 14

2. Paper feeding ............................................................................................................6 - 15

2.1 MSI (Multi Sheet Inserter) ............................................................................................................... 6 - 16

2.1.1 Main function........................................................................................................................... 6 - 16

2.2 Registration & FUSER .................................................................................................................... 6 - 18

2.2.1 Main function........................................................................................................................... 6 - 18

2.2.2 Adjustment of edge of paper................................................................................................... 6 - 19

2.3 250/500 Paper Feeder .................................................................................................................... 6 - 20

2.3.1 Main function........................................................................................................................... 6 - 20

3. Xerographic ...............................................................................................................6 - 23

3.1 ROS ................................................................................................................................................ 6 - 24

3.1.1 Main function........................................................................................................................... 6 - 24

3.2 XERO CRU ..................................................................................................................................... 6 - 25

3.2.1 Main function........................................................................................................................... 6 - 25

3.3 Development................................................................................................................................... 6 - 28

3.3.1 Main function........................................................................................................................... 6 - 28

3.4 Second BTR & FUSER ................................................................................................................... 6 - 30

3.4.1 Main function........................................................................................................................... 6 - 30

4. Electrical ....................................................................................................................6 - 32

4.1 Main function................................................................................................................................... 6 - 32

5. Flow of printing data ..................................................................................................6 - 34

5.1 Data flow ......................................................................................................................................... 6 - 34

6. Operation mode.........................................................................................................6 - 35

7. Control .......................................................................................................................6 - 36

7.1 Paper size control ........................................................................................................................... 6 - 36

7.2 ROS laser intensity control ............................................................................................................. 6 - 36

7.3 Process control ............................................................................................................................... 6 - 36

7.4 Belt position control......................................................................................................................... 6 - 38

7.5 Adjustment of FUSER fixing temperature ....................................................................................... 6 - 39

7.6 FUSER safety circuit....................................................................................................................... 6 - 39

7.7 Detection of life of consumable items and parts to be changed on regular basis........................... 6 - 40

Chapter 6 Principle s of O peration

Table of Contents