Canon DADF-P1 Service Manual page 21

Contents
2.1 Basic Construction ............................................................................................................................................. 2-1
2.1.1 Outline of Electric Circuit ........................................................................................................................... 2-1
2.2 Basic Operation .................................................................................................................................................. 2-1
2.2.1 Drive Mechanism and Signals..................................................................................................................... 2-1
2.2.2 Outline of Operation Mode ......................................................................................................................... 2-2
2.2.3 Forward Pickup/Delivery (Single-sided document > Simplex Printing) Operation ................................... 2-2
2.2.4 Forward Pickup/Reversal Delivery (Double-sided document > Duplex printing) Operation..................... 2-2
2.3 Document Detection........................................................................................................................................... 2-4
2.3.1 Outline ......................................................................................................................................................... 2-4
2.3.2 Document Presence/Absence Detection...................................................................................................... 2-4
2.3.3 Detection of Last Document........................................................................................................................ 2-4
2.3.4 Initial Document Size Detection ................................................................................................................. 2-5
2.4 Document Pickup/Separation ............................................................................................................................. 2-6
2.4.1 Basic Pickup Operation ............................................................................................................................... 2-6
2.4.2 Pickup Unit and Stopper.............................................................................................................................. 2-7
2.4.3 Pickup Timing ............................................................................................................................................. 2-7
2.4.4 Pickup Motor (M2) Control ........................................................................................................................ 2-7
2.5 Document Reversing .......................................................................................................................................... 2-8
2.5.1 Basic Operation ........................................................................................................................................... 2-8
2.5.2 Operation Sequence..................................................................................................................................... 2-9
2.6 Document Feeding/Delivery .............................................................................................................................. 2-9
2.6.1 Basic Operation ........................................................................................................................................... 2-9
2.6.2 Operation Sequence................................................................................................................................... 2-10
2.6.3 Feed Motor (M1) Control.......................................................................................................................... 2-10
2.7 Detecting Jams ................................................................................................................................................. 2-10
2.7.1 Jam............................................................................................................................................................. 2-10
2.8 Power Supply ................................................................................................................................................... 2-11
2.8.1 Power Supply ............................................................................................................................................ 2-11
2.9 Stamp Operation............................................................................................................................................... 2-11
2.9.1 Outline ....................................................................................................................................................... 2-11
Contents