Canon imagePROGRAF IPF8400 Service Manual page 65

Contents
2.1 Basic Operation Outline ................................................................................................................................................ 2-1
2.1.1 Printer Diagram ............................................................................................................................................................................ 2-1
2.1.2 Print Signal Sequence................................................................................................................................................................... 2-2
2.1.3 Print Driving................................................................................................................................................................................. 2-3
2.2 Firmware........................................................................................................................................................................ 2-5
2.2.1 Operation Sequence at Power-on ................................................................................................................................................. 2-5
2.2.2 Operation Sequence at Power-off ................................................................................................................................................ 2-6
2.2.3 Print Position Adjustment Function ............................................................................................................................................. 2-7
2.2.4 Head Management........................................................................................................................................................................ 2-7
2.2.5 Printhead Overheating Protection Control ................................................................................................................................... 2-7
2.2.6 Pause between Pages.................................................................................................................................................................... 2-7
2.2.7 White Raster Skip......................................................................................................................................................................... 2-7
2.2.8 Sleep Mode................................................................................................................................................................................... 2-7
2.2.9 Hard Disk Drive ........................................................................................................................................................................... 2-8
2.3 Printer Mechanical System ............................................................................................................................................ 2-9
2.3.1 Outline.......................................................................................................................................................................................... 2-9
2.3.1.1 Outline.............................................................................................................................................................................................................2-9
2.3.2 Ink Passage................................................................................................................................................................................. 2-10
2.3.2.1 Ink Passage.................................................................................................................................................................................................... 2-10
2.3.2.1.1 Overview of Ink Passage....................................................................................................................................................................... 2-10
2.3.2.2 Ink Tank Unit ................................................................................................................................................................................................ 2-11
2.3.2.2.1 Structure of Ink Tank Unit .................................................................................................................................................................... 2-11
2.3.2.3 Carriage Unit................................................................................................................................................................................................. 2-13
2.3.2.3.1 Functions of Carriage Unit.................................................................................................................................................................... 2-13
2.3.2.3.2 Structure of Carriage Unit..................................................................................................................................................................... 2-14
2.3.2.4 Printhead ....................................................................................................................................................................................................... 2-16
2.3.2.4.1 Structure of Printhead ........................................................................................................................................................................... 2-16
2.3.2.5 Purge Unit ..................................................................................................................................................................................................... 2-17
2.3.2.5.1 Functions of Purge Unit ........................................................................................................................................................................ 2-17
2.3.2.5.2 Structure of Purge Unit ......................................................................................................................................................................... 2-20
2.3.2.6 Maintenance Cartridge.................................................................................................................................................................................. 2-22
2.3.2.6.1 Maintenance Cartridge.......................................................................................................................................................................... 2-22
2.3.2.7 Air Flow ........................................................................................................................................................................................................ 2-23
2.3.2.7.1 Air Flow ................................................................................................................................................................................................ 2-23
2.3.3 Paper Path................................................................................................................................................................................... 2-24
2.3.3.1 Outline........................................................................................................................................................................................................... 2-24
2.3.3.1.1 Overview of Paper Path ........................................................................................................................................................................ 2-24
2.3.3.2 Paper Path ..................................................................................................................................................................................................... 2-25
2.3.3.2.1 Structure of Feed Roller Unit................................................................................................................................................................ 2-25
2.3.3.3 Cutter Unit .................................................................................................................................................................................................... 2-26
2.3.3.3.1 Structure of Cutter Unit......................................................................................................................................................................... 2-26
2.4 Printer Electrical System ............................................................................................................................................. 2-27
2.4.1 Outline........................................................................................................................................................................................ 2-27
2.4.1.1 Overview....................................................................................................................................................................................................... 2-27
2.4.2 Main Controller .......................................................................................................................................................................... 2-29
2.4.2.1 Main controller PCB components................................................................................................................................................................. 2-29
2.4.3 Carriage Relay PCB ................................................................................................................................................................... 2-31
2.4.3.1 Carriage relay PCB components ................................................................................................................................................................... 2-31
2.4.4 Head Relay PCB......................................................................................................................................................................... 2-31
Contents