Contents8.3.3.1 Door Open Jam.................................................................................................................................. 8- 258.4 Cassette Pick-Up Unit ..................................................................................................................................... 8- 268.4.1Overview ................................................................................................................................................... 8- 268.4.2Basic Sequence ......................................................................................................................................... 8- 278.4.3Identifying the Paper Size ......................................................................................................................... 8- 278.4.4Setting Up the Universal Cassette ............................................................................................................. 8- 298.4.5Paper Level Sensor .................................................................................................................................... 8- 308.5 Manual Feed Pickup Unit................................................................................................................................ 8- 348.5.1Overview ................................................................................................................................................... 8- 348.5.2Basic Sequence of Operation .................................................................................................................... 8- 358.5.3Identifying the Paper Size ......................................................................................................................... 8- 358.5.4Paper Retaining Mechanism...................................................................................................................... 8- 368.6 Registration Unit ............................................................................................................................................. 8- 388.6.1Overview ................................................................................................................................................... 8- 388.6.2Checking Horizontal Registration ............................................................................................................. 8- 388.7 Duplex Feeding Unit ....................................................................................................................................... 8- 408.7.1Overview ................................................................................................................................................... 8- 408.7.2Overview ................................................................................................................................................... 8- 418.7.3Sequence of Image Formation................................................................................................................... 8- 428.7.4Sequence of Image Formation................................................................................................................... 8- 448.7.5Flow of Paper (w/o/ delivery option) ........................................................................................................ 8- 458.7.6Flow of Paper (w/ delivery option) ........................................................................................................... 8- 518.7.7Flow of Paper ........................................................................................................................................... 8- 578.8 Parts Replacement Procedure.......................................................................................................................... 8- 648.8.1 Pick-up Unit 1 ........................................................................................................................................... 8- 648.8.1.1 Removing the Right Cover (rear) ...................................................................................................... 8- 648.8.1.2 Removing the Right Door ................................................................................................................. 8- 648.8.1.3 Removing the Right Door ................................................................................................................. 8- 658.8.1.4 Removing the Right Cover (lower front) .......................................................................................... 8- 668.8.1.5 Removing the Pickup Assembly 1 .................................................................................................... 8- 668.8.2 Pick-up Unit 2 ........................................................................................................................................... 8- 678.8.2.1 Removing the Right Cover (rear) ...................................................................................................... 8- 678.8.2.2 Removing the Right Cover (lower front) .......................................................................................... 8- 678.8.2.3 Removing the Pickup Assembly 2 .................................................................................................... 8- 678.8.3 Pickup Roller ............................................................................................................................................ 8- 688.8.3.1 Removing the Pickup Roller/Feed Roller/Separation Roller ............................................................ 8- 688.8.4 Sensor Mount ............................................................................................................................................ 8- 688.8.4.1 Removing the Right Cover (rear) ...................................................................................................... 8- 688.8.4.2 Removing the Right Door ................................................................................................................. 8- 688.8.4.3 Removing the Right Door ................................................................................................................. 8- 708.8.4.4 Removing the Right Cover (lower front) .......................................................................................... 8- 708.8.4.5 Removing the Pickup Assembly 1 .................................................................................................... 8- 718.8.4.6 Removing the Pickup Assembly 2 .................................................................................................... 8- 718.8.4.7 Removing the Sensor Mounting Plate............................................................................................... 8- 718.8.4.8 Mounting the Sensor Mounting Plate................................................................................................ 8- 728.8.5 Cassette Pick-up Motor 1.......................................................................................................................... 8- 738.8.5.1 Removing the Rear Cover ................................................................................................................. 8- 738.8.5.2 Removing the Right Cover (rear) ...................................................................................................... 8- 738.8.5.3 Removing the Pickup Motor Base..................................................................................................... 8- 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