12.3.2 Periodical Servicing Chart Reader Unit................................................................................................................12- 4

12.3.3 Periodical Servicing Chart Printer Unit.................................................................................................................12- 5

12.3.4 Points to Note for Periodical Servicing.................................................................................................................12- 6

12.4 Cleaning ................................................................................................................................................. 12- 7

12.4.1 Cleaning the Primary Anti-Stray Sheet ................................................................................................................12- 7

12.4.2 Cleaning the Developing Anti-Stray Sheet...........................................................................................................12- 7

12.4.3 Cleaning the Cleaner Side Scraper......................................................................................................................12- 7

12.4.4 Cleaning the Photosensitive Drum.......................................................................................................................12- 8

Chapter 13 Standards and Adjustments

13.1 Image Adjustment Basic Procedure ....................................................................................................... 13- 1

13.1.1 Making Pre-Checks..............................................................................................................................................13- 1

13.1.2 Making Checks on the Printer Unit (1/2) ..............................................................................................................13- 1

13.1.3 Making Checks on the Printer Unit (2/2) ..............................................................................................................13- 3

13.1.4 Making Checks on the Reader Unit .....................................................................................................................13- 5

13.1.5 Checking the Potential System ............................................................................................................................13- 8

13.1.6 Checking the Surface Potential Control System ................................................................................................13- 11

13.1.7 Potential Control System Conversion Table ......................................................................................................13- 14

13.1.8 Emergency Measures for a Fault in the Potential Sensor..................................................................................13- 17

13.2 Image Adjustments ............................................................................................................................... 13- 18

13.2.1 Standards of Image Position ..............................................................................................................................13- 18

13.2.2 Checking the Image Position .............................................................................................................................13- 18

13.2.3 Adjusting Side Registration ................................................................................................................................13- 18

13.2.4 Adjusting the Image Leading Edge Margin ........................................................................................................13- 19

13.2.5 Adjusting the Left/Right Non-Image Width .........................................................................................................13- 20

13.2.6 Adjusting the Leading Edge Non-Image Width ..................................................................................................13- 20

13.3 Scanning System.................................................................................................................................. 13- 21

13.3.1 After Replacing the Reader Controller PCB.......................................................................................................13- 21

13.3.2 When Replacing the CCD Unit...........................................................................................................................13- 21

13.3.3 Adjusting the Position of the No. 1/No. 2 Mirror Base........................................................................................13- 21

13.3.4 When Replacing the Platen Board Glass...........................................................................................................13- 22

13.3.5 When Replacing the Reading Glass ..................................................................................................................13- 22

13.3.6 When Replacing the Scanning Lamp.................................................................................................................13- 22

13.3.7 When Replacing the Inverter PCB .....................................................................................................................13- 22

13.4 Laser Exposure System ....................................................................................................................... 13- 23

13.4.1 When Replacing the Scanner Unit .....................................................................................................................13- 23

13.5 Image Formation System ..................................................................................................................... 13- 24

13.5.1 Outline of the Charging Wire..............................................................................................................................13- 24

13.5.2 Routing the Charging Wire.................................................................................................................................13- 24

13.5.3 Routing the Grid for the Primary Charging Assembly ........................................................................................13- 24

13.5.4 Adjusting the Height of the Charging Wire .........................................................................................................13- 25

13.5.5 Mounting the Cleaning Blade .............................................................................................................................13- 25

13.5.6 Mounting the Side Seal ......................................................................................................................................13- 26

13.6 Fixing System ....................................................................................................................................... 13- 27

13.6.1 Applying Grease After Replacing the Fixing Roller ............................................................................................13- 27

13.6.2 Adjusting the Nip Width......................................................................................................................................13- 27

13.6.3 Adjusting the Position of the Fixing Web Solenoid (SL9)...................................................................................13- 27

13.6.4 After Replacing the Fixing Web..........................................................................................................................13- 27

13.6.5 Adjusting the Position of he Fixing Inlet Guide Solenoid (SL1)..........................................................................13- 27

13.6.6 Adjusting the Position of the Fixing Inlet Guide..................................................................................................13- 27

13.7 Electrical Components.......................................................................................................................... 13- 29

13.7.1 When Replacing the DC Controller PCB............................................................................................................13- 29

13.7.2 When Replacing the HVT PCB ..........................................................................................................................13- 29

Table of Contents