
Contents
8.3.1 Controlling the Laser Activation Timing .................................................................................................... 8-5
8.3.1.1 Turning On/Off the Laser .................................................................................................................... 8-5
8.3.1.2 BD Signal ............................................................................................................................................ 8-7
8.3.1.3 Controlling Synchronization in Main Scanning Direction .................................................................. 8-8
8.3.1.4 Controlling Synchronization in Sub Scanning Direction .................................................................... 8-8
8.3.2 Controlling the Intensity of Laser Light ..................................................................................................... 8-9
8.3.2.1 APC Control ........................................................................................................................................ 8-9
8.3.2.2 PWM Control ...................................................................................................................................... 8-9
8.3.3 Controlling the Laser Scanner Motor ....................................................................................................... 8-10
8.3.3.1 Controlling the Laser Scanner Motor ................................................................................................ 8-10
8.3.4 Controlling the Laser Shutter .................................................................................................................... 8-10
8.3.4.1 Controlling the Laser Shutter ............................................................................................................ 8-10
8.3.5 Correcting Image Displacement ................................................................................................................ 8-11
8.3.5.1 Outline ............................................................................................................................................... 8-11
8.3.5.2 Timing of Color Displacement Detection/Correction ....................................................................... 8-12
8.3.5.3 Detecting/Correcting Color Displacement in Sub Scanning Direction ............................................. 8-13
8.3.5.4 Detecting/Correcting the Angle in Main Scanning Direction ........................................................... 8-14
8.3.5.5 Detecting/Correcting Color Displacement in Main Scanning Direction ........................................... 8-16
8.3.5.6 Detecting/Correcting Changes in the Reproduction Ratio in Main Scanning Direction ................... 8-17
8.4 Parts Replacement Procedure .......................................................................................................................... 8-19
8.4.1 Laser Unit .................................................................................................................................................. 8-19
8.4.1.1 Removing the Center Delivery Tray ................................................................................................. 8-19
8.4.1.2 Removing the Laser Unit ................................................................................................................... 8-19
8.4.1.3 After Replacing the Laser Unit .......................................................................................................... 8-20
Chapter 9
Image Formation
9.1 Construction ...................................................................................................................................................... 9-1
9.1.1 Specifications, Control Mechanisms, and Functions ................................................................................. 9-1
9.1.2 Major Components of the Image Formation System ................................................................................. 9-3
9.1.3 Charging Specifications ............................................................................................................................. 9-4
9.2 Image Formation Process .................................................................................................................................. 9-6
9.2.1 Image Formation Process (general) ............................................................................................................ 9-6
9.2.2 Image Formation Process (image formation) ............................................................................................. 9-7
9.2.3 Image Formation Process (transfer) ........................................................................................................... 9-7
9.3 Basic Sequence .................................................................................................................................................. 9-8
9.3.1 At Power-On (1) ......................................................................................................................................... 9-8
9.3.2 At Power-On (2) ......................................................................................................................................... 9-8
9.3.3 During Copying/Printing Operations (normal speed) ................................................................................ 9-9
9.3.4 Making Copies/Prints (half speed) ........................................................................................................... 9-10
9.3.5 After Replacing the Drum Unit (D-UNIT) ............................................................................................... 9-10
9.3.6 Printing Originals Containing a Color Page ............................................................................................. 9-11
9.3.7 Driving and Controlling the Image Formation System and the High-Voltage System ............................ 9-11
9.4 Image Stabilization Control ............................................................................................................................. 9-13
9.4.1 Outline of Image Quality Control ............................................................................................................ 9-13
9.4.2 Automatic Image Stabilization Control .................................................................................................... 9-13
9.4.3 ATR Control ............................................................................................................................................. 9-17
9.4.4 Discharge Current Level Control ............................................................................................................. 9-17
9.4.5 ATVC Control (transfer bias level correction) ......................................................................................... 9-18
9.4.6 PASCAL Control (image gradation) ........................................................................................................ 9-18
9.4.7 SALT-Dmax Control (development characteristics correction) .............................................................. 9-19
9.4.8 SALT-Dhalf Control (development characteristics correction) ............................................................... 9-20
9.4.9 Auto Gradation Control ............................................................................................................................ 9-22
9.5 Drum Unit ........................................................................................................................................................ 9-24
Summary of Contents for iR C3200 Series
Page 1: ...Dec 3 2004 Service Manual iR C3200 Series iR C3220N PRT ...
Page 2: ......
Page 6: ......
Page 40: ...Contents ...
Page 41: ...Chapter 1 Introduction ...
Page 42: ......
Page 44: ......
Page 73: ...Chapter 2 Installation ...
Page 74: ......
Page 144: ...Chapter 2 2 68 ...
Page 145: ...Chapter 3 Basic Operation ...
Page 146: ......
Page 148: ......
Page 158: ...Chapter 3 3 10 ...
Page 159: ...Chapter 4 Basic Operations As a Printer ...
Page 160: ......
Page 162: ......
Page 171: ...Chapter 5 Main Controller ...
Page 172: ......
Page 212: ...Chapter 5 5 38 ...
Page 213: ...Chapter 6 Original Exposure System ...
Page 214: ......
Page 250: ...Chapter 6 6 34 ...
Page 251: ...Chapter 7 Image Processing System ...
Page 252: ......
Page 254: ......
Page 260: ...Chapter 7 7 6 ...
Page 261: ...Chapter 8 Laser Exposure ...
Page 262: ......
Page 264: ......
Page 285: ...Chapter 9 Image Formation ...
Page 286: ......
Page 291: ...Contents ...
Page 292: ......
Page 396: ...Chapter 9 9 104 ...
Page 397: ...Chapter 10 Pickup Feeding System ...
Page 398: ......
Page 406: ...Contents ...
Page 437: ...Chapter 10 10 31 9 1 2 3 10 1 2 3 ...
Page 574: ...Chapter 10 10 168 ...
Page 575: ...Chapter 11 Fixing System ...
Page 576: ......
Page 580: ......
Page 650: ...Chapter 11 11 70 ...
Page 651: ...Chapter 12 Externals and Controls ...
Page 652: ......
Page 658: ...Contents ...
Page 729: ...Chapter 13 MEAP ...
Page 730: ......
Page 732: ......
Page 737: ...Chapter 14 Maintenance and Inspection ...
Page 738: ......
Page 740: ......
Page 749: ...Chapter 15 Standards and Adjustments ...
Page 750: ......
Page 752: ......
Page 766: ...Chapter 15 15 14 ...
Page 767: ...Chapter 16 Correcting Faulty Images ...
Page 768: ......
Page 785: ...Chapter 16 16 11 6 Mottled Image F 16 12 7 Flow image on Side F 16 13 8 Toner Stray F 16 14 ...
Page 789: ...Chapter 16 16 15 2 20 to 30 mm White Spot F 16 23 3 White Spots Leading Edge F 16 24 ...
Page 826: ...Chapter 16 16 52 F 16 45 ...
Page 835: ...Chapter 16 16 61 Image1 F 16 50 Image2 F 16 51 ...
Page 977: ...Chapter 17 Self Diagnosis ...
Page 978: ......
Page 979: ...Contents Contents 17 1 Error Code Details 17 1 17 1 1 Error Code Details Table 17 1 ...
Page 980: ......
Page 1002: ...Chapter 17 17 22 ...
Page 1003: ...Chapter 18 Service Mode ...
Page 1004: ......
Page 1128: ...Chapter 18 18 122 ...
Page 1129: ...Chapter 19 Upgrading ...
Page 1130: ......
Page 1132: ......
Page 1141: ...Chapter 19 19 9 5 Click Register Firmware F 19 8 6 Click Register from selected folder F 19 9 ...
Page 1156: ...Chapter 19 19 24 T 19 5 F 19 32 T 19 6 Normal Mode Safe Mode ...
Page 1185: ...Chapter 19 19 53 2 Select DCON and click Connect F 19 73 3 Click Set host name F 19 74 ...
Page 1192: ...Chapter 19 19 60 2 Select G3FAX and click Connect F 19 84 3 Click Set host name F 19 85 ...
Page 1209: ...Chapter 20 Service Tools ...
Page 1210: ......
Page 1211: ...Contents Contents 20 1 Special Tools 20 1 20 2 Solvents and Oils 20 2 ...
Page 1212: ......
Page 1215: ...Dec 3 2004 ...
Page 1216: ......