Canon DADF-AA1 Service Manual page 61

Contents
4.1 Points to Note on Disassembly and Reassembly ........................................................................................................... 4-1
4.1.1 Points to Note When Turning Off the Main Power of the Host Machine.................................................................................... 4-1
4.2 External Covers ............................................................................................................................................................. 4-1
4.2.1 Front Cover .................................................................................................................................................................................. 4-1
4.2.1.1 Removing the Front Cove ...............................................................................................................................................................................4-1
4.2.2 Rear Cover.................................................................................................................................................................................... 4-1
4.2.2.1 Removing the Rear Cover...............................................................................................................................................................................4-1
4.2.3 Feeder Cover ................................................................................................................................................................................ 4-1
4.2.3.1 Removing the Feeder Cover ...........................................................................................................................................................................4-1
4.3 Drive System ................................................................................................................................................................. 4-1
4.3.1 Pickup Motor................................................................................................................................................................................ 4-1
4.3.1.1 Removing the Pickup/Feed Motor ..................................................................................................................................................................4-1
4.3.2 Engaging Motor............................................................................................................................................................................ 4-2
4.3.2.1 Removing the Release Motor..........................................................................................................................................................................4-2
4.3.3 Timing Belt/Pulley ....................................................................................................................................................................... 4-2
4.3.3.1 Removing the Timing Belt..............................................................................................................................................................................4-2
4.3.4 Pickup Clutch ............................................................................................................................................................................... 4-3
4.3.4.1 Removing the Pickup Clutch .........................................................................................................................................................................4-3
4.3.5 Registration Clutch....................................................................................................................................................................... 4-3
4.3.5.1 Removing the Registration Clutch..................................................................................................................................................................4-3
4.4 Document Feeding System ............................................................................................................................................ 4-4
4.4.1 Pickup Roller Unit........................................................................................................................................................................ 4-4
4.4.1.1 Removing the Pickup Roller Unit...................................................................................................................................................................4-4
4.4.1.2 Precaution about Pickup Roller Unit Installation ...........................................................................................................................................4-4
4.4.2 Pickup Roller/Separation Roller................................................................................................................................................... 4-4
4.4.2.1 Removing the Pickup Roller/Feed Roller .......................................................................................................................................................4-4
4.4.3 Separation Plate/Separation Pad................................................................................................................................................... 4-5
4.4.3.1 Removing the Separation Pad .........................................................................................................................................................................4-5
4.4.4 Upper Registration Roller ............................................................................................................................................................ 4-5
4.4.4.1 Points to Note When Replacing the Upper Registration Roller......................................................................................................................4-5
4.4.5 Lower Registration Roller............................................................................................................................................................ 4-5
4.4.5.1 Removing the Lower Registration Roller .......................................................................................................................................................4-5
4.4.6 Delivery Reversing Roller (upper)............................................................................................................................................... 4-7
4.4.6.1 Removing the Upper Delivery Reversal Roller ..............................................................................................................................................4-7
4.4.7 Read Roller 1................................................................................................................................................................................ 4-8
4.4.7.1 Removing the Read Roller 1...........................................................................................................................................................................4-8
4.4.8 Read Roller 2................................................................................................................................................................................ 4-9
4.4.8.1 Removing the Read Roller 2...........................................................................................................................................................................4-9
4.4.9 Platen Roller............................................................................................................................................................................... 4-11
4.4.9.1 Removing the Platen Roller .......................................................................................................................................................................... 4-11
4.4.10 Feeding Unit............................................................................................................................................................................. 4-12
4.4.10.1 Removing the Feed Unit ............................................................................................................................................................................. 4-12
4.4.11 Feed Roller Guide .................................................................................................................................................................... 4-13
4.4.11.1 Exchanging the Feed Roller Guide ............................................................................................................................................................ 4-13
4.4.12 Document Tray......................................................................................................................................................................... 4-13
4.4.12.1 Removing the Document Tray.................................................................................................................................................................... 4-13
4.5 Electrical System ......................................................................................................................................................... 4-14
4.5.1 Fan.............................................................................................................................................................................................. 4-14
Contents