1.1 Features .....................................................................................................................................................1- 1

1.1.1 Feature .................................................................................................................................................................... 1- 1

1.2 System Construction ..................................................................................................................................1- 1

1.2.1 System Construction ............................................................................................................................................... 1- 1

1.2.2 System Construction ............................................................................................................................................... 1- 1

1.3 Product Specifications ................................................................................................................................1- 1

1.3.1 Product Specifications ............................................................................................................................................. 1- 1

1.3.2 Product Specifications ............................................................................................................................................. 1- 2

1.4 Name of Parts.............................................................................................................................................1- 3

1.4.1 External View........................................................................................................................................................... 1- 3

1.4.2 External View........................................................................................................................................................... 1- 4

1.4.3 Cross Sectional Views............................................................................................................................................. 1- 5

1.5 Using the Machine ......................................................................................................................................1- 6

1.5.1 Control Panel........................................................................................................................................................... 1- 6

1.5.2 Control Panel........................................................................................................................................................... 1- 6

Chapter 2 TECHNICAL REFERENCE

2.1 Functional Configuration.............................................................................................................................2- 1

2.1.1 Outline ..................................................................................................................................................................... 2- 1

2.2 Basic Sequense..........................................................................................................................................2- 1

2.2.1 Basic Operation Sequence...................................................................................................................................... 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

2.3.1.2 Laser Control Circuit ................................................................................................................................................................ 2- 3

2.3.2 Controlling the Laser Activation Timing ................................................................................................................... 2- 5

2.3.2.1 Laser emission control ............................................................................................................................................................. 2- 5

2.3.2.2 Horizontal synchronous control................................................................................................................................................ 2- 5

2.3.3 Laser Control ........................................................................................................................................................... 2- 5

2.3.3.1 Automatic power control (APC)................................................................................................................................................ 2- 5

2.3.3.2 Image masking control............................................................................................................................................................. 2- 5

2.3.4 Laser Scanner Motor Control .................................................................................................................................. 2- 6

2.3.4.1 Outline...................................................................................................................................................................................... 2- 6

2.3.4.2 Scanner motor speed control................................................................................................................................................... 2- 7

2.3.4.3 Scanner motor failure detection ............................................................................................................................................... 2- 7

2.4 IMAGE FORMATION SYSTEM..................................................................................................................2- 7

2.4.1 Overview/Configuration ........................................................................................................................................... 2- 7

2.4.1.1 Outline...................................................................................................................................................................................... 2- 7

2.4.1.2 Print Process............................................................................................................................................................................ 2- 8

2.4.1.3 Electrostatic latent image formation block ............................................................................................................................... 2- 9

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 Photosensitive drum cleaning block....................................................................................................................................... 2- 11

2.4.2 High-Voltage Control ............................................................................................................................................. 2- 12

2.4.2.1 Outline.................................................................................................................................................................................... 2- 12

2.4.2.2 Primary charging bias generation .......................................................................................................................................... 2- 12

2.4.2.3 Developing bias generation ................................................................................................................................................... 2- 12

2.4.2.4 Transfer charging bias generation ......................................................................................................................................... 2- 13

Contents