4.5.4 Printer unit Output Image Processing ......................................................................................................................4- 9

4.6 Flow of Image Data .................................................................................................................................. 4- 10

4.6.1 Flow of Image Data According to Copy Functions.................................................................................................4- 10

4.6.2 Flow of Image Data for the Box Function...............................................................................................................4- 10

4.6.3 Flow of Image Data for the SEND Function...........................................................................................................4- 11

4.6.4 Flow of Image Data for the Fax Transmission .......................................................................................................4- 11

4.6.5 Flow of Image Data for the Fax Reception Function..............................................................................................4- 12

4.6.6 Flow of Image Data for the PDL Function..............................................................................................................4- 12

4.7 Parts Replacement Procedure ................................................................................................................. 4- 13

4.7.1 Image PCB.............................................................................................................................................................4- 13

4.7.1.1 Removing the Image PCB ..................................................................................................................................................... 4- 13

4.7.2 Main Controller PCB ..............................................................................................................................................4- 13

4.7.2.1 Before Removing the Main Controller PCB ........................................................................................................................... 4- 13

4.7.2.2 Removing the Main Controller PCB ....................................................................................................................................... 4- 13

4.7.3 SDRAM ..................................................................................................................................................................4- 14

4.7.3.1 Removing the SDRAM (for image processing) ...................................................................................................................... 4- 14

4.7.3.2 Removing the SDRAM (for system processing) .................................................................................................................... 4- 15

4.7.4 HDD .......................................................................................................................................................................4- 15

4.7.4.1 Removing the HDD ................................................................................................................................................................ 4- 15

4.7.5 Wireless LAN PCB.................................................................................................................................................4- 15

4.7.5.1 Removing the Wireless LAN PCB.......................................................................................................................................... 4- 15

4.7.6 IPSec PCB .............................................................................................................................................................4- 16

4.7.6.1 Removing the IPSec PCB...................................................................................................................................................... 4- 16

4.7.7 PCI Bus Expansion PCB........................................................................................................................................4- 17

4.7.7.1 Before Removing the PCI Bus Expansion PCB..................................................................................................................... 4- 17

4.7.7.2 Removing the PCI Bus Expansion PCB ................................................................................................................................ 4- 17

4.7.8 Voice Guidance PCB .............................................................................................................................................4- 17

4.7.8.1 Removing the Voice Guidance PCB ...................................................................................................................................... 4- 17

4.7.9 Voice Operation PCB.............................................................................................................................................4- 18

4.7.9.1 Removing the Voice Operation PCB...................................................................................................................................... 4- 18

4.7.10 FAX Expansion PCB ............................................................................................................................................4- 19

4.7.10.1 Removing the FAX Expansion PCB..................................................................................................................................... 4- 19

Chapter 5 Original Exposure System

5.1 Construction ............................................................................................................................................... 5- 1

5.1.1 Specifications/controls/functions..............................................................................................................................5- 1

5.1.2 Major Components...................................................................................................................................................5- 2

5.1.3 Configuration of Control System ..............................................................................................................................5- 3

5.1.4 Reader Controller PCB ............................................................................................................................................5- 4

5.2 Basic Sequence ......................................................................................................................................... 5- 5

5.2.1 Basic Sequence at Power-On..................................................................................................................................5- 5

5.2.2 Basic Sequence at Start Key ON (book mode/1 original) ........................................................................................5- 5

5.2.3 Basic Sequence at Start Key ON (ADF mode/1 original).........................................................................................5- 5

5.3 Various Control........................................................................................................................................... 5- 6

5.3.1 Controlling the Scanner Drive System .....................................................................................................................5- 6

5.3.1.1 Overview .................................................................................................................................................................................. 5- 6

5.3.1.2 Scanner Motor Control............................................................................................................................................................. 5- 6

5.3.2 CCD .........................................................................................................................................................................5- 8

5.3.2.1 Overview .................................................................................................................................................................................. 5- 8

5.3.3 Enlargement/Reduction .........................................................................................................................................5- 11

5.3.3.1 Magnifications in Main Scanning Direction ............................................................................................................................ 5- 11

5.3.3.2 Magnification in Sub Scanning Direction ............................................................................................................................... 5- 11

5.3.4 Detecting the Size of Originals...............................................................................................................................5- 12

5.3.4.1 Overview ................................................................................................................................................................................ 5- 12

5.3.4.2 Control Details ....................................................................................................................................................................... 5- 12

5.3.4.3 Detection Operation Overview ............................................................................................................................................... 5- 14

5.3.5 Dirt Sensor Control ................................................................................................................................................5- 15

Table of Contents