Canon iR C6800 Series Service Manual page 12

Contents
7.11.34 ITB Cleaning Blade.............................................................................................................................. 7 242
7.11.35 ITB Scoop up Sheet ............................................................................................................................. 7 249
7.11.36 Intermediate Transfer Belt Static Eliminator ....................................................................................... 7 254
7.11.37 Secondary Transfer Static Eliminator .................................................................................................. 7 260
7.11.38 Ptential Sensor Unit.............................................................................................................................. 7 261
7.11.39 ATR Sensor Unit .................................................................................................................................. 7 268
7.11.40 Patch Image Sensor .............................................................................................................................. 7 274
7.11.41 Idle Roller............................................................................................................................................. 7 280
7.11.42 Patch Image Reading Sensor Shutter Solenoid .................................................................................... 7 287
7.11.43 Charging Wire ...................................................................................................................................... 7 293
Chapter 8 Pickup/Feeding System
8.1 Construction........................................................................................................................................................ 8 1
8.1.1 Specifications, Control Mechanisms, and Functions................................................................................... 8 1
8.1.2 Major Divisions of the Machine .................................................................................................................. 8 2
8.1.3 Arrangement of Rollers ............................................................................................................................... 8 3
8.1.4 Diagram of the Paper Path ........................................................................................................................... 8 5
8.1.5 Arrangement of Sensors .............................................................................................................................. 8 6
8.1.6 Arrangement of Solenoids ........................................................................................................................... 8 8
8.1.7 Arrangement of Drive Mechanisms............................................................................................................. 8 9
8.2 Basic Sequence ................................................................................................................................................. 8 10
8.2.1 Basic Sequence of Operation (in response to a press on the Start key)..................................................... 8 10
8.2.2 Interval Acceleration ................................................................................................................................. 8 12
8.2.3 Stopping the Paper Before Registration .................................................................................................... 8 16
8.3 Detecting Jams.................................................................................................................................................. 8 17
8.3.1 Delivery Jams ............................................................................................................................................. 8 17
8.3.2 Stationary Jams .......................................................................................................................................... 8 19
8.3.3 Other Jams.................................................................................................................................................. 8 21
8.4 Cassette ............................................................................................................................................................. 8 22
8.4.1 Overview.................................................................................................................................................... 8 22
8.4.2 Identifying Paper Sizes .............................................................................................................................. 8 23
8.4.3 Setting the Universal Cassette ................................................................................................................... 8 25
8.4.4 Checking the Level of Remaining Paper ................................................................................................... 8 26
8.5 Cassette Pick Up Unit....................................................................................................................................... 8 28
8.5.1 Overview.................................................................................................................................................... 8 28
8.5.2 Basic Sequence .......................................................................................................................................... 8 29
8.5.3 Movement of the Lifter.............................................................................................................................. 8 30
8.6 Manual Feed Pickup Unit ................................................................................................................................. 8 31
8.6.1 Overview.................................................................................................................................................... 8 31
8.6.2 Basic Sequence .......................................................................................................................................... 8 32
8.6.3 Identifying the Size of Paper ..................................................................................................................... 8 32
8.6.4 Identifying the Last Sheet .......................................................................................................................... 8 33
8.7 Deck .................................................................................................................................................................. 8 34
8.7.1 Overview.................................................................................................................................................... 8 34
8.7.2 Basic Sequence .......................................................................................................................................... 8 35
8.7.3 Identifying the Size of Paper ..................................................................................................................... 8 36
8.7.4 Checking the Level of Remaining Paper ................................................................................................... 8 37
8.8 Registration Unit............................................................................................................................................... 8 38
8.8.1 Overview.................................................................................................................................................... 8 38
8.9 Duplex Feeding Unit......................................................................................................................................... 8 39
8.9.1 Overview.................................................................................................................................................... 8 39
8.9.2 Detecting the Horizontal Registration Position ......................................................................................... 8 43
8.9.3 A5, 5 Sheets in Circulation ........................................................................................................................ 8 45
8.9.4 A3, 3 Sheets in Circulation ........................................................................................................................ 8 47