Canon iR2020 Series Service Manual page 199

Contents
7.1 Construction ...................................................................................................................................................................7-1
7.1.1 Specifications/Configuration/Operation Methods ....................................................................................................................... 7-1
7.1.2 Locations of Main Units .............................................................................................................................................................. 7-1
7.1.3 Roller Layout Drawing ................................................................................................................................................................ 7-2
7.1.4 Paper Path Drawing(Printer on its own) ...................................................................................................................................... 7-2
7.1.5 Paper Path Drawing(Finisher-U1) ............................................................................................................................................... 7-3
7.1.6 Paper Path Drawing(Duplex Unit-A1/Finisher-U1) .................................................................................................................... 7-3
7.1.7 Paper Path Drawing(Duplex-A1)................................................................................................................................................. 7-3
7.1.8 Paper Path Drawing(Duplex-A1/Inner 2Way Tray-E1) .............................................................................................................. 7-4
7.1.9 Paper Path Drawing(Inner 2Way Tray-E1) ................................................................................................................................. 7-4
7.1.10 Sensor Layout Drawing ............................................................................................................................................................. 7-5
7.2 Detecting Jams ...............................................................................................................................................................7-6
7.2.1 Delay Jams ................................................................................................................................................................................... 7-6
7.2.1.1 Delay Jam in Pickup Assembly.......................................................................................................................................................................7-6
7.2.1.2 Delay Jam in Delivery Assembly (Paper Leading Edge Jam at First Delivery Sensor/Wound Paper Jam at Fixing Assembly) ..................7-6
7.2.2 Stationary Jams ............................................................................................................................................................................ 7-6
7.2.2.1 Stationary Jam in Pickup Assembly................................................................................................................................................................7-6
7.2.2.2 Stationary Jam in Delivery Assembly (Paper Trailing Edge Stationary Jam at First Delivery Sensor/Stationary Jam at First Delivery Sensor)
7-6
7.2.3 Other Jams ................................................................................................................................................................................... 7-6
7.2.3.1 Door Open Jam ...............................................................................................................................................................................................7-6
7.3 Cassette Pick-Up Unit ....................................................................................................................................................7-6
7.3.1 Overview...................................................................................................................................................................................... 7-6
7.3.2 Cassette Pickup Operation ........................................................................................................................................................... 7-7
7.3.3 Cassette Paper Size Detection...................................................................................................................................................... 7-8
7.4 Manual Feed Pickup Unit ..............................................................................................................................................7-9
7.4.1 Overview...................................................................................................................................................................................... 7-9
7.4.2 Post-pickup Control after Multi Manual Feed Pickup ................................................................................................................. 7-9
7.5 Parts Replacement Procedure.......................................................................................................................................7-10
7.5.1 Pickup Roller ............................................................................................................................................................................. 7-10
7.5.1.1 Removing the Cassette Paper Pickup Roller.................................................................................................................................................7-10
7.5.2 Cassette Pickup Assembly ......................................................................................................................................................... 7-10
7.5.2.1 Removing the Lower-left Cover ...................................................................................................................................................................7-10
7.5.2.2 Removing the Cassette Pickup Assembly.....................................................................................................................................................7-10
7.5.3 Cassette Size Sensor .................................................................................................................................................................. 7-10
7.5.3.1 Removing the Paper Size Detection Switches ..............................................................................................................................................7-10
7.5.4 Cassette Retry Paper Sensor ...................................................................................................................................................... 7-10
7.5.4.1 Removing the Lower-left Cover ...................................................................................................................................................................7-10
7.5.4.2 Removing the Cassette Pickup Assembly.....................................................................................................................................................7-11
7.5.4.3 Removing the Retry Sensor ..........................................................................................................................................................................7-11
7.5.5 Cassette Paper Sensor ................................................................................................................................................................ 7-11
7.5.5.1 Removing the Lower-left Cover ...................................................................................................................................................................7-11
7.5.5.2 Removing the Cassette Pickup Assembly
7.5.5.3 Removing the Cassette Paper Presence/Absence Sensor..............................................................................................................................7-12
7.5.6 Cassette Pickup Solenoid ........................................................................................................................................................... 7-12
7.5.6.1 Removing the Lower-left Cover ...................................................................................................................................................................7-12
7.5.6.2 Removing the Cassette Pickup Assembly.....................................................................................................................................................7-12
7.5.6.3 Removing the Cassette Pickup Solenoid.......................................................................................................................................................7-12
7.5.7 Manual Pickup Roller ................................................................................................................................................................ 7-12
7.5.7.1 Removing the Drum Unit..............................................................................................................................................................................7-12
7.5.7.2 Removing the Transfer Registration Unit .....................................................................................................................................................7-13
7.5.7.3 Removing the Feed Guide.............................................................................................................................................................................7-13
.................................................................................................................................................7-11
Contents