ContentsContents4.1 Construction ...................................................................................................................................................................4-14.1.1 Construction and Mechanisms ..................................................................................................................................................... 4-14.2 Construction of the Electrical Circuitry .........................................................................................................................4-24.2.1 Main Controller PCB ................................................................................................................................................................... 4-24.2.2 HDD ............................................................................................................................................................................................. 4-24.3 Start-Up Sequence..........................................................................................................................................................4-54.3.1 Overview...................................................................................................................................................................................... 4-54.3.2 Start-Up Sequence ....................................................................................................................................................................... 4-54.4 Shut-Down Sequence .....................................................................................................................................................4-84.4.1 Overview...................................................................................................................................................................................... 4-84.4.2 Flow of Operation ........................................................................................................................................................................ 4-84.5 Image Processing ...........................................................................................................................................................4-94.5.1 Overview of the Image Flow ....................................................................................................................................................... 4-94.5.2 Construction of the Image Processing Module ............................................................................................................................ 4-94.5.3 Reader Unit Input Image Processing ......................................................................................................................................... 4-104.5.4 Compression/ Extension/ Editing Block ................................................................................................................................... 4-114.5.5 Printer unit Output Image Processing ........................................................................................................................................ 4-114.6 Flow of Image Data......................................................................................................................................................4-124.6.1 Flow of Image Data According to Copy Functions ................................................................................................................... 4-124.6.2 Flow of Image Data for the Box Function ................................................................................................................................. 4-124.6.3 Flow of Image Data for the SEND Function ............................................................................................................................. 4-134.6.4 Flow of Image Data for the Fax Transmission .......................................................................................................................... 4-134.6.5 Flow of Image Data for the Fax Reception Function ................................................................................................................ 4-144.6.6 Flow of Image Data for the PDL Function ................................................................................................................................ 4-154.7 Parts Replacement Procedure.......................................................................................................................................4-164.7.1 Main Controller Box .................................................................................................................................................................. 4-164.7.1.1 Removing the Rear Cover (upper) ................................................................................................................................................................4-164.7.1.2 Removing the Main Controller Box..............................................................................................................................................................4-164.7.2 Main Controller PCB ................................................................................................................................................................. 4-174.7.2.1 Removing the Main Controller PCB.............................................................................................................................................................4-174.7.2.2 After Replacing the Main Controller PCB....................................................................................................................................................4-184.7.3 SDRAM ..................................................................................................................................................................................... 4-184.7.3.1 Removing the SDRAM .................................................................................................................................................................................4-184.7.4 Boot ROM.................................................................................................................................................................................. 4-184.7.4.1 Removing the Boot ROM .............................................................................................................................................................................4-184.7.5 HDD ........................................................................................................................................................................................... 4-194.7.5.1 Removing the HDD.......................................................................................................................................................................................4-194.7.5.2 After Replacing the HDD..............................................................................................................................................................................4-194.7.6 Controller Fan ............................................................................................................................................................................ 4-194.7.6.1 Removing the Controller Cooling Fan..........................................................................................................................................................4-19
