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Contents
3.1.2 Connections Among Major PCBs ............................................................................................................................3- 2
3.2 Basic Sequence ......................................................................................................................................... 3- 3
3.2.1 Basic Sequence of Operations at Power-On ...........................................................................................................3- 3
3.2.2 Basic Sequence of Operations for a Print Job (full color) ........................................................................................3- 3
3.2.3 Basic Sequence of Operations for a Print Job (mono color)....................................................................................3- 4
Chapter 4 Main Controller
4.1 Construction ............................................................................................................................................... 4- 1
4.1.1 Construction and Functions .....................................................................................................................................4- 1
4.2 Construction of the Electrical Circuitry........................................................................................................ 4- 2
4.2.1 Main Controller PCB (main) .....................................................................................................................................4- 2
4.2.2 SRAM PCB ..............................................................................................................................................................4- 2
4.3 Start-Up Sequence ..................................................................................................................................... 4- 4
4.3.1 Overview ..................................................................................................................................................................4- 4
4.3.2 Start-Up Sequence ..................................................................................................................................................4- 4
4.4 Actions when HDD Error ............................................................................................................................ 4- 6
4.4.1 E602 in Detail...........................................................................................................................................................4- 6
4.5 Image Processing....................................................................................................................................... 4- 9
4.5.1 Overview of the Flow of Image Data........................................................................................................................4- 9
4.5.2 Reader Input Image Processing ............................................................................................................................4- 10
4.5.3 Printer Output Image Processing...........................................................................................................................4- 11
4.5.4 Compression, Decompression, and Edit Processing Blocks .................................................................................4- 12
4.6 Flow of Image Data .................................................................................................................................. 4- 12
4.6.1 Flow of Image Data for Copier Functions ..............................................................................................................4- 12
4.6.2 Flow of Image Data for Box Functions...................................................................................................................4- 13
4.6.3 Flow of Image Data for SEND Functions ...............................................................................................................4- 13
4.6.4 Flow of Image Data for Fax Transmission Functions.............................................................................................4- 14
4.6.5 Flow of Image Data for Fax Reception Functions..................................................................................................4- 14
4.6.6 Flow of Image Data for PDL Functions ..................................................................................................................4- 15
4.7 Parts Replacement Procedure ................................................................................................................. 4- 16
4.7.1 Controller Box ........................................................................................................................................................4- 16
4.7.1.1 Before Removing the Main Controller Box............................................................................................................................. 4- 16
4.7.1.2 Removing the Controller Box ................................................................................................................................................. 4- 16
4.7.2 Main Controller PCB (main) ...................................................................................................................................4- 16
4.7.2.1 Before Removing the Main Controller PCB ........................................................................................................................... 4- 16
4.7.2.2 Removing the Main Controller PCB ....................................................................................................................................... 4- 16
4.7.2.3 Replacing Main Controller PCB ............................................................................................................................................ 4- 17
4.7.3 Main Controller PCB (sub R-A)..............................................................................................................................4- 17
4.7.3.1 Before Removing the Main Controller PCB (sub-R-A)........................................................................................................... 4- 17
4.7.3.2 Removing the Main Controller PCB (sub-R-A) ...................................................................................................................... 4- 17
4.7.4 Main Controller PCB (sub PDRM-A)......................................................................................................................4- 17
4.7.4.1 Before Removing the Main Controller PCB (sub-PDRAM-A) ................................................................................................ 4- 17
4.7.4.2 Removing the Main Controller PCB (sub-PDRAM-A) ............................................................................................................ 4- 17
4.7.5 Main Controller PCB (sub SJ-A) ............................................................................................................................4- 18
4.7.5.1 Before Removing the Main Controller PCB (sub SJ-A) ......................................................................................................... 4- 18
4.7.5.2 Removing the Main Controller PCB (sub SJ-A) ..................................................................................................................... 4- 18
4.7.6 Main Controller PCB (sub LAN-A) .........................................................................................................................4- 18
4.7.6.1 Before Removing the Main Controller PCB (sub LANBAR-C) ............................................................................................... 4- 18
4.7.6.2 Removing the Main Controller PCB (sub LANBAR-C)........................................................................................................... 4- 18
4.7.7 Main Controller PCB (sub RB-A) ...........................................................................................................................4- 19
4.7.7.1 Before Removing the Main Controller PCB (sub RB-A2)....................................................................................................... 4- 19
4.7.7.2 Removing the Main Controller PCB (sub RB-A2) .................................................................................................................. 4- 19
4.7.8 SRAM PCB ............................................................................................................................................................4- 19
4.7.8.1 Before Removing the SRAM.................................................................................................................................................. 4- 19
4.7.8.2 Removing the SRAM ............................................................................................................................................................. 4- 20
4.7.8.3 When Replacing the SRAM PCB........................................................................................................................................... 4- 20
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