Canon imagePROGRAF iPF815 Service Manual page 77

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 Control............................................................................................................................................................. 2-7
2.2.4 Print Position Adjustment Function......................................................................................................................... 2-16
2.2.5 Head Management ................................................................................................................................................. 2-16
2.2.6 Printhead Overheating Protection Control.............................................................................................................. 2-16
2.2.7 Pause between Pages............................................................................................................................................ 2-16
2.2.8 White Raster Skip................................................................................................................................................... 2-16
2.2.9 Sleep Mode ............................................................................................................................................................ 2-16
2.2.10 Hard Disk Drive..................................................................................................................................................... 2-16
2.3 Printer Mechanical System ....................................................................................................................... 2-18
2.3.1 Outline .................................................................................................................................................................... 2-18
2.3.1.1 Outline..................................................................................................................................................................................... 2-18
2.3.2 Ink Passage............................................................................................................................................................ 2-19
2.3.2.1 Ink Passage ............................................................................................................................................................................ 2-19
2.3.2.1.1 Overview of Ink Passage ................................................................................................................................................. 2-19
2.3.2.2 Ink Tank Unit........................................................................................................................................................................... 2-20
2.3.2.2.1 Structure of Ink Tank Unit ................................................................................................................................................ 2-20
2.3.2.3 Carriage Unit........................................................................................................................................................................... 2-22
2.3.2.3.1 Functions of Carriage Unit ............................................................................................................................................... 2-22
2.3.2.3.2 Structure of Carriage Unit ................................................................................................................................................ 2-23
2.3.2.4 Printhead................................................................................................................................................................................. 2-25
2.3.2.4.1 Structure of Printhead...................................................................................................................................................... 2-25
2.3.2.5 Purge Unit ............................................................................................................................................................................... 2-26
2.3.2.5.1 Functions of Purge Unit ................................................................................................................................................... 2-26
2.3.2.5.2 Structure of Purge Unit .................................................................................................................................................... 2-28
2.3.2.6 Maintenance Cartridge............................................................................................................................................................ 2-30
2.3.2.6.1 Maintenance Cartridge .................................................................................................................................................... 2-30
2.3.2.7 Air Flow ................................................................................................................................................................................... 2-31
2.3.2.7.1 Air Flow............................................................................................................................................................................ 2-31
2.3.3 Paper Path.............................................................................................................................................................. 2-32
2.3.3.1 Outline..................................................................................................................................................................................... 2-32
2.3.3.1.1 Overview of Paper Path ................................................................................................................................................... 2-32
2.3.3.2 Paper Path .............................................................................................................................................................................. 2-33
2.3.3.2.1 Structure of Pick-up/Feed Unit......................................................................................................................................... 2-33
2.3.3.3 Cutter Unit............................................................................................................................................................................... 2-36
2.3.3.3.1 Structure of Cutter Unit .................................................................................................................................................... 2-36
2.4 Printer Electrical System........................................................................................................................... 2-37
2.4.1 Outline .................................................................................................................................................................... 2-37
2.4.1.1 Overview ................................................................................................................................................................................. 2-37
2.4.2 Main Controller ....................................................................................................................................................... 2-39
2.4.2.1 Main controller PCB components ........................................................................................................................................... 2-39
2.4.3 Carriage Relay PCB ............................................................................................................................................... 2-41
2.4.3.1 Carriage relay PCB components ............................................................................................................................................ 2-41
2.4.4 Head Relay PCB .................................................................................................................................................... 2-41
2.4.4.1 Head relay PCB components.................................................................................................................................................. 2-41
2.4.5 Motor Driver............................................................................................................................................................ 2-42
2.4.5.1 Media take-up PCB components ............................................................................................................................................ 2-42
Contents