Canon iPF750 series Service Manual page 65

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........................................................................................................................................... 2-14
2.2.5 Head Management ..................................................................................................................................................................... 2-14
2.2.6 Printhead Overheating Protection Control................................................................................................................................. 2-14
2.2.7 Pause between Pages.................................................................................................................................................................. 2-14
2.2.8 White Raster Skip ...................................................................................................................................................................... 2-14
2.2.9 Sleep Mode ................................................................................................................................................................................ 2-14
2.2.10 Hard Disk Drive ....................................................................................................................................................................... 2-14
2.3 Printer Mechanical System ..........................................................................................................................................2-16
2.3.1 Outline........................................................................................................................................................................................ 2-16
2.3.1.1 Outline...........................................................................................................................................................................................................2-16
2.3.2 Ink Passage................................................................................................................................................................................. 2-17
2.3.2.1 Ink Passage....................................................................................................................................................................................................2-17
2.3.2.1.1 Overview of Ink Passage.......................................................................................................................................................................2-17
2.3.2.2 Ink Tank Unit ................................................................................................................................................................................................2-18
2.3.2.2.1 Structure of Ink Tank Unit ....................................................................................................................................................................2-18
2.3.2.3 Carriage Unit .................................................................................................................................................................................................2-20
2.3.2.3.1 Functions of Carriage Unit....................................................................................................................................................................2-20
2.3.2.3.2 Structure of Carriage Unit .....................................................................................................................................................................2-21
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 .........................................................................................................................................................................2-28
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 .................................................................................................................................................................................. 2-33
2.3.3.1 Outline...........................................................................................................................................................................................................2-33
2.3.3.1.1 Overview of Paper Path.........................................................................................................................................................................2-33
2.3.3.2 Paper Path......................................................................................................................................................................................................2-34
2.3.3.2.1 Structure of Feed Roller Unit ................................................................................................................................................................2-34
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
2.4.1.2 Overview .......................................................................................................................................................................................................2-39
2.4.2 Main Controller.......................................................................................................................................................................... 2-41
2.4.2.1 Main controller PCB components.................................................................................................................................................................2-41
2.4.2.2 Main controller PCB components.................................................................................................................................................................2-42
2.4.2.3 HDD expansion PCB components ................................................................................................................................................................2-43
2.4.3 Carriage Relay PCB................................................................................................................................................................... 2-44
2.4.3.1 Carriage PCB components ............................................................................................................................................................................2-44
Contents