Canon iPF800 Series Service Manual page 103

Contents
2.1 Basic Operation Outline.................................................................................................................................................2-1
2.1.1 Printer Diagram............................................................................................................................................................................ 2-1
2.1.2 Printer Diagram............................................................................................................................................................................ 2-2
2.1.3 Print Signal Sequence .................................................................................................................................................................. 2-3
2.1.4 Print Driving ................................................................................................................................................................................ 2-4
2.2 Firmware ........................................................................................................................................................................2-6
2.2.1 Operation Sequence at Power-on................................................................................................................................................. 2-6
2.2.2 Operation Sequence at Power-off ................................................................................................................................................ 2-7
2.2.3 Print Control................................................................................................................................................................................. 2-8
2.2.4 Print Position Adjustment Function........................................................................................................................................... 2-15
2.2.5 Head Management ..................................................................................................................................................................... 2-15
2.2.6 Printhead Overheating Protection Control................................................................................................................................. 2-15
2.2.7 Pause between Pages.................................................................................................................................................................. 2-15
2.2.8 White Raster Skip ...................................................................................................................................................................... 2-15
2.2.9 Sleep Mode ................................................................................................................................................................................ 2-15
2.2.10 Hard Disk Drive ....................................................................................................................................................................... 2-15
2.3 Printer Mechanical System ..........................................................................................................................................2-17
2.3.1 Outline........................................................................................................................................................................................ 2-17
2.3.1.1 Outline...........................................................................................................................................................................................................2-17
2.3.2 Ink Passage................................................................................................................................................................................. 2-18
2.3.2.1 Ink Passage....................................................................................................................................................................................................2-18
2.3.2.1.1 Overview of Ink Passage.......................................................................................................................................................................2-18
2.3.2.2 Ink Tank Unit ................................................................................................................................................................................................2-19
2.3.2.2.1 Structure of Ink Tank Unit ....................................................................................................................................................................2-19
2.3.2.3 Carriage Unit .................................................................................................................................................................................................2-21
2.3.2.3.1 Functions of Carriage Unit....................................................................................................................................................................2-21
2.3.2.3.2 Structure of Carriage Unit .....................................................................................................................................................................2-22
2.3.2.4 Printhead .......................................................................................................................................................................................................2-24
2.3.2.4.1 Structure of Printhead............................................................................................................................................................................2-24
2.3.2.5 Purge Unit .....................................................................................................................................................................................................2-25
2.3.2.5.1 Functions of Purge Unit ........................................................................................................................................................................2-25
2.3.2.5.2 Structure of Purge Unit .........................................................................................................................................................................2-27
2.3.2.6 Maintenance Cartridge ..................................................................................................................................................................................2-29
2.3.2.6.1 Maintenance Cartridge ..........................................................................................................................................................................2-29
2.3.2.7 Air Flow ........................................................................................................................................................................................................2-30
2.3.2.7.1 Air flow .................................................................................................................................................................................................2-30
2.3.3 Paper Path .................................................................................................................................................................................. 2-31
2.3.3.1 Outline...........................................................................................................................................................................................................2-31
2.3.3.1.1 Overview of Paper Path.........................................................................................................................................................................2-31
2.3.3.2 Paper Path......................................................................................................................................................................................................2-32
2.3.3.2.1 Structure of Pick-up/Feed Unit .............................................................................................................................................................2-32
2.3.3.3 Cutter Unit.....................................................................................................................................................................................................2-35
2.3.3.3.1 Structure of Cutter Unit.........................................................................................................................................................................2-35
2.4 Printer Electrical System..............................................................................................................................................2-36
2.4.1 Outline........................................................................................................................................................................................ 2-36
2.4.1.1 Overview .......................................................................................................................................................................................................2-36
2.4.1.2 Overview .......................................................................................................................................................................................................2-38
2.4.2 Main Controller.......................................................................................................................................................................... 2-40
2.4.2.1 Main controller PCB components.................................................................................................................................................................2-40
2.4.3 Carriage Relay PCB................................................................................................................................................................... 2-42
2.4.3.1 Carriage relay PCB components ...................................................................................................................................................................2-42
2.4.4 Head Relay PCB ........................................................................................................................................................................ 2-42
2.4.4.1 Head relay PCB components ........................................................................................................................................................................2-42
Contents