Canon imagerunner C5180 Service Manual page 130

Contents
5.1 Construction ....................................................................................................... 5-1
5.1.1 Configuration/Functions ............................................................................................ 5-1
5.2 Construction of the Electrical Circuitry........................................................... 5-3
5.2.1 Main Controller Circuit Board (MAIN) ..................................................................... 5-3
5.2.2 SRAM Circuit Board................................................................................................... 5-4
5.3 Start-Up Sequence ........................................................................................... 5-5
5.3.1 Overview...................................................................................................................... 5-5
5.3.2 Start-Up Sequence .................................................................................................... 5-5
5.4 Actions when HDD Error.................................................................................. 5-9
5.4.1 E602 Details................................................................................................................ 5-9
5.5 Image Processing ........................................................................................... 5-13
5.5.1 Overview of the Flow of Image Data..................................................................... 5-13
5.5.2 Reader Input Image Processing ............................................................................ 5-14
5.5.3 Printer Output Image Processing .......................................................................... 5-15
5.5.4 Compression, Decompression, and Edit Processing Blocks ............................ 5-16
5.6 Flow of Image Data......................................................................................... 5-17
5.6.1 Flow of Image Data for Copier Functions............................................................. 5-17
5.6.2 Flow of Image Data for Box Functions ................................................................. 5-18
5.6.3 Flow of Image Data for SEND Functions ............................................................. 5-19
5.6.4 Flow of Image Data for Fax Transmission Functions......................................... 5-20
5.6.5 Flow of Image Data for Fax Reception Functions .............................................. 5-21
5.6.6 Flow of Image Data for PDL Functions................................................................. 5-22
5.7 Parts Replacement Procedure...................................................................... 5-23
5.7.1 Main Controller Box .................................................................................................5-23
5.7.2 Main Controller PCB (main) ...................................................................................5-23
5.7.3 Main Controller PCB (sub R-A) ..............................................................................5-27
5.7.4 Main Controller PCB (sub PDRM-A) .....................................................................5-28
5.7.5 Main Controller PCB (sub SJ-A) ............................................................................5-28
5.7.6 Main Controller PCB (sub LAN-A) .........................................................................5-29
5.7.7 Main Controller PCB (sub RB-A) ...........................................................................5-30
5.7.8 SRAM PCB ...............................................................................................................5-31
5.7.9 Boot ROM PCB ........................................................................................................5-31
5.7.10 Image Memory (SDRAM) .....................................................................................5-32
5.7.11 HDD ..........................................................................................................................5-33
5.7.12 Controller Fan .........................................................................................................5-34
Contents