Canon iPF825, Service Manual

Page: 69 / 316

Contents
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 Lower roll unit PCB components............................................................................................................................................. 2 -42