Canon imagePROGRAF iPF670 Service Manual page 67

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 Shut Down Mode ..................................................................................................................................................... 2-7
2.3 Printer Mechanical System ......................................................................................................................... 2-8
2.3.1 Outline ..................................................................................................................................................................... 2-8
2.3.1.1 Outline...................................................................................................................................................................................... 2-8
2.3.2 Ink Passage............................................................................................................................................................. 2-9
2.3.2.1 Ink Passage ............................................................................................................................................................................. 2-9
2.3.2.1.1 Overview of Ink Passage .................................................................................................................................................. 2-9
2.3.2.2 Ink Tank Unit........................................................................................................................................................................... 2-10
2.3.2.2.1 Structure of Ink Tank Unit ................................................................................................................................................ 2-10
2.3.2.3 Carriage Unit........................................................................................................................................................................... 2-12
2.3.2.3.1 Functions of Carriage Unit ............................................................................................................................................... 2-12
2.3.2.3.2 Structure of Carriage Unit ................................................................................................................................................ 2-13
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.............................................................................................................................................................. 2-25
2.3.3.1 Outline..................................................................................................................................................................................... 2-25
2.3.3.1.1 Overview of Paper Path ................................................................................................................................................... 2-25
2.3.3.2 Paper Path .............................................................................................................................................................................. 2-26
2.3.3.2.1 Structure of Feed Roller Unit ........................................................................................................................................... 2-26
2.3.3.3 Cutter Unit............................................................................................................................................................................... 2-28
2.3.3.3.1 Structure of Cutter Unit .................................................................................................................................................... 2-28
2.4 Printer Electrical System........................................................................................................................... 2-29
2.4.1 Outline .................................................................................................................................................................... 2-29
2.4.1.1 Overview ................................................................................................................................................................................. 2-29
2.4.2 Main Controller ....................................................................................................................................................... 2-31
2.4.2.1 Main controller PCB components ........................................................................................................................................... 2-31
2.4.2.2 Connectors and Pin Arrangement of Main controller PCB...................................................................................................... 2-32
2.4.3 Carriage Relay PCB ............................................................................................................................................... 2-39
2.4.3.1 Carriage PCB components ..................................................................................................................................................... 2-39
2.4.3.2 Connectors and Pin Arrangement of Carriage PCB ............................................................................................................... 2-40
2.4.4 Maintenance Cartridge Relay PCB......................................................................................................................... 2-44
2.4.4.1 Maintenance cartridge relay PCB components....................................................................................................................... 2-44
2.4.5 Power Supply ......................................................................................................................................................... 2-45
Contents