Canon iPF720 Service Manual page 8

Contents
2.2.3 Print Control .............................................................................................................................................................2- 7
2.2.4 Print Position Adjustment Function ........................................................................................................................2- 12
2.2.5 Head Management ................................................................................................................................................2- 12
2.2.6 Printhead Overheating Protection Control .............................................................................................................2- 12
2.2.7 Pause between Pages ...........................................................................................................................................2- 12
2.2.8 White Raster Skip ..................................................................................................................................................2- 12
2.2.9 Sleep Mode............................................................................................................................................................2- 12
2.2.10 Hard disk drive .....................................................................................................................................................2- 13
2.3 Printer Mechanical System....................................................................................................................... 2- 14
2.3.1 Outline....................................................................................................................................................................2- 14
2.3.1.1 Outline.................................................................................................................................................................................... 2- 14
2.3.2 Ink Passage ...........................................................................................................................................................2- 15
2.3.2.1 Ink Passage ........................................................................................................................................................................... 2- 15
2.3.2.2 Ink Tank Unit.......................................................................................................................................................................... 2- 16
2.3.2.3 Carriage Unit.......................................................................................................................................................................... 2- 18
2.3.2.4 Printhead................................................................................................................................................................................ 2- 21
2.3.2.5 Purge Unit .............................................................................................................................................................................. 2- 22
2.3.2.6 Maintenance Cartridge........................................................................................................................................................... 2- 27
2.3.2.7 Air Flow .................................................................................................................................................................................. 2- 28
2.3.3 Paper Path .............................................................................................................................................................2- 29
2.3.3.1 Outline.................................................................................................................................................................................... 2- 29
2.3.3.2 Paper Path ............................................................................................................................................................................. 2- 30
2.3.3.3 Cutter Unit.............................................................................................................................................................................. 2- 31
2.4 Printer Electrical System .......................................................................................................................... 2- 32
2.4.1 Outline....................................................................................................................................................................2- 32
2.4.1.1 Overview ................................................................................................................................................................................ 2- 32
2.4.2 Main Controller.......................................................................................................................................................2- 34
2.4.2.1 Main controller components................................................................................................................................................... 2- 34
2.4.3 Carriage Relay PCB...............................................................................................................................................2- 35
2.4.3.1 Carriage relay PCB components ........................................................................................................................................... 2- 35
2.4.4 Head Relay PCB....................................................................................................................................................2- 35
2.4.4.1 Head relay PCB components................................................................................................................................................. 2- 35
2.4.5 Maintenance Cartridge Relay PCB ........................................................................................................................2- 36
2.4.5.1 Maintenance cartridge relay PCB components...................................................................................................................... 2- 36
2.4.6 Power Supply.........................................................................................................................................................2- 36
2.4.6.1 Power supply block diagram .................................................................................................................................................. 2- 36
2.5 Detection Functions with Sensors ............................................................................................................ 2- 37
2.5.1 Sensors for covers .................................................................................................................................................2- 37
2.5.2 Ink passage system ...............................................................................................................................................2- 38
2.5.3 Carriage system.....................................................................................................................................................2- 40
2.5.4 Paper path system .................................................................................................................................................2- 41
2.5.5 Others ....................................................................................................................................................................2- 41
Chapter 3 INSTALLATION
3.1 Transporting the Printer.............................................................................................................................. 3- 1
3.1.1 Transporting the Printer ...........................................................................................................................................3- 1
3.1.1.1 Transporting the Printer ........................................................................................................................................................... 3- 1
3.1.2 Reinstalling the Printer.............................................................................................................................................3- 3
3.1.2.1 Reinstalling the Printer............................................................................................................................................................. 3- 3
Chapter 4 DISASSEMBLY/REASSEMBLY
4.1 Service Parts .............................................................................................................................................. 4- 1
4.1.1 Service Parts............................................................................................................................................................4- 1
4.2 Disassembly/Reassembly .......................................................................................................................... 4- 2
4.2.1 Disassembly/Reassembly........................................................................................................................................4- 2
4.3 Points to Note on Disassembly and Reassembly....................................................................................... 4- 3