Canon iR8500 Service Manual page 13

Contents
9.4.2 Detecting the Presence/Absence of Paper ............................................................................................................9- 21
9.4.3 Detecting the Level of Paper..................................................................................................................................9- 22
9.4.4 Cassette 3/4...........................................................................................................................................................9- 23
9.4.5 Markings on the Width Guide Rail .........................................................................................................................9- 24
9.4.6 Paper Size .............................................................................................................................................................9- 24
9.5 Manual Feed Pickup Unit ......................................................................................................................... 9- 27
9.5.1 Pickup Operation ...................................................................................................................................................9- 27
9.5.2 Detecting the Paper Size .......................................................................................................................................9- 27
9.6 Deck ......................................................................................................................................................... 9- 29
9.6.1 Outline....................................................................................................................................................................9- 29
9.6.2 Lifter Limiter (deck right/left) ..................................................................................................................................9- 30
9.6.3 Detecting the Presence/Absence of Paper ............................................................................................................9- 31
9.6.4 Detecting the Level of Paper..................................................................................................................................9- 32
9.6.5 Cassette Deck Right/Left .......................................................................................................................................9- 34
9.7 Registration Unit ....................................................................................................................................... 9- 35
9.7.1 Outline....................................................................................................................................................................9- 35
9.7.2 Control System ......................................................................................................................................................9- 35
9.7.3 Sequence of Operations (registration brake) .........................................................................................................9- 35
9.8 Duplex Feeding Unit ................................................................................................................................. 9- 37
9.8.1 Copying on the First Side.......................................................................................................................................9- 37
9.8.2 Printing on the First Side........................................................................................................................................9- 37
9.8.3 Copying on the Second Side .................................................................................................................................9- 38
9.8.4 Printing on the Second Side ..................................................................................................................................9- 39
9.8.5 Sequence of Operations ........................................................................................................................................9- 40
9.8.6 Sequence of Operations ........................................................................................................................................9- 40
9.8.7 Controlling the reversal motor (M11) .....................................................................................................................9- 40
9.8.8 Controlling the duplexing feeder motor (M12)........................................................................................................9- 41
9.8.9 No-Stacking Operation...........................................................................................................................................9- 42
9.8.10 No-Stacking Operation.........................................................................................................................................9- 47
9.8.11 Detecting the Horizontal Registration Position.....................................................................................................9- 52
9.8.12 Controlling the Horizontal Registration Motor (M15) ............................................................................................9- 53
9.9 Delivery .................................................................................................................................................... 9- 55
9.9.1 Reversal Delivery...................................................................................................................................................9- 55
9.9.2 Reversal Delivery...................................................................................................................................................9- 55
9.10 Parts Replacement Procedure ............................................................................................................... 9- 57
9.10.1 Cassette Pickup Assembly...................................................................................................................................9- 57
9.10.1.1 Removing the Cassette 3 Pickup Assembly ........................................................................................................................ 9- 57
9.10.1.2 Removing the Cassette 4 Pickup Assembly ........................................................................................................................ 9- 57
9.10.1.3 Removing the Vertical Path 3/4 Sensor and the Cassette 3/4 Pickup Sensor..................................................................... 9- 57
9.10.2 Cassette Lifter Motor............................................................................................................................................9- 57
9.10.2.1 Removing the Lifter Motor (M16/M17) of the Cassette (3/4)................................................................................................ 9- 57
9.10.3 Front Deck Pickup Assembly ...............................................................................................................................9- 58
9.10.3.1 Removing the Front Deck (right) .......................................................................................................................................... 9- 58
9.10.3.2 Removing the Pickup Assembly of the Front Deck (left)...................................................................................................... 9- 58
9.10.4 Left Deck Pickup Sensor......................................................................................................................................9- 59
9.10.4.1 Removing the Left Deck Pickup Sensor............................................................................................................................... 9- 59
9.10.5 Right Deck Pickup Sensor ...................................................................................................................................9- 59
9.10.5.1 Removing the Right Deck Feed Sensor/Right Deck Pickup Sensor .................................................................................... 9- 59
9.10.6 Manual Tray Assembly.........................................................................................................................................9- 59
9.10.6.1 Removing the Manual Feed Tray Unit ................................................................................................................................. 9- 59
9.10.6.2 Removing the Manual Feed Tray Unit ................................................................................................................................. 9- 60
9.10.6.3 Fitting the Side Guide Timing Belt for the Manual Feed Tray Assembly(iR105) .................................................................. 9- 60
9.10.6.4 Fitting the Side Guide Timing Belt for the Manual Feed Tray Assembly.............................................................................. 9- 60
9.10.7 Manual Pickup Roller ...........................................................................................................................................9- 60
9.10.7.1 Removing the Pickup Roller................................................................................................................................................. 9- 60
9.10.7.2 Mounting the Pickup Roller .................................................................................................................................................. 9- 60
9.10.8 Manual Feed Roller..............................................................................................................................................9- 61
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