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7.7.1.1 Overview ................................................................................................................................................................................ 7- 35
7.7.1.2 Primary Transfer Block .......................................................................................................................................................... 7- 35
7.7.1.3 ITB Soiling Removal Sequence Control................................................................................................................................. 7- 36
7.7.1.4 Secondary Transfer Block...................................................................................................................................................... 7- 37
7.8 Waste Toner Collection Mechanism .........................................................................................................7- 37
7.8.1 Collecting the Waste Toner ................................................................................................................................... 7- 37
7.8.2 Detecting the Level of Waste Toner ...................................................................................................................... 7- 38
7.8.3 Waste toner case detection ................................................................................................................................... 7- 39
7.9 Parts Replacement Procedure .................................................................................................................7- 40
7.9.1 Process Unit .......................................................................................................................................................... 7- 40
7.9.1.1 Removing the Process Unit ................................................................................................................................................... 7- 40
7.9.2 Drum Unit .............................................................................................................................................................. 7- 40
7.9.2.1 Removing the Drum Cartridge ............................................................................................................................................... 7- 40
7.9.3 Drum ITB Motor ..................................................................................................................................................... 7- 42
7.9.3.1 Before Removing the Drum ITB Moto.................................................................................................................................... 7- 42
7.9.3.2 Removing the Drum ITB Motor .............................................................................................................................................. 7- 42
7.9.4 Hopper Assembly .................................................................................................................................................. 7- 42
7.9.4.1 Before Removing the Hopper Supply Unit ............................................................................................................................. 7- 42
7.9.4.2 Removing the Hopper Supply Unit......................................................................................................................................... 7- 42
7.9.5 Developing Motor (Bk/Y/M/C)................................................................................................................................ 7- 43
7.9.5.1 Before Removing the Developing Motor ................................................................................................................................ 7- 43
7.9.5.2 Removing the Developing Motor............................................................................................................................................ 7- 43
7.9.6 Intermediate Transfer Unit..................................................................................................................................... 7- 43
7.9.6.1 Removing the ITB Unit........................................................................................................................................................... 7- 43
7.9.7 Transfer Cleaning Unit........................................................................................................................................... 7- 44
7.9.7.1 Before Removing the Transfer Cleaner Unit.......................................................................................................................... 7- 44
7.9.7.2 Removing the Transfer Cleaner Unit ..................................................................................................................................... 7- 44
7.9.8 Secondary Transfer External Roller ...................................................................................................................... 7- 45
7.9.8.1 Removing the Secondary Transfer Outer Roller.................................................................................................................... 7- 45
7.9.8.2 After Replacing the Secondary Transfer Roller ..................................................................................................................... 7- 45
8.1 Construction ...............................................................................................................................................8- 1
8.1.1 Specifications, Controls, and Functions .................................................................................................................. 8- 1
8.1.2 Division into Blocks.................................................................................................................................................. 8- 2
8.1.3 Arrangement of Rollers............................................................................................................................................ 8- 3
8.1.4 Diagram of Paper Paths (w/ copy tray )................................................................................................................... 8- 4
8.1.5 Diagram of Paper Paths (w/ Finisher-Z1/copy tray) ................................................................................................ 8- 5
8.1.6 Diagram of Paper Paths (w/ Finisher-Y1/Saddle Finisher-Y2) ................................................................................ 8- 5
8.1.7 Arrangement of Sensors.......................................................................................................................................... 8- 6
8.1.8 Route of Drive.......................................................................................................................................................... 8- 7
8.2 Basic Sequence..........................................................................................................................................8- 8
8.2.1 Basic Sequence....................................................................................................................................................... 8- 8
8.3 Controlling the Feeding Speed ...................................................................................................................8- 8
8.3.1 Increase in Speed.................................................................................................................................................... 8- 8
8.3.2 Feeding Speed According to the Print Media and Resolution ................................................................................ 8- 9
8.3.3 Feeding Speed of Each Feeding Path and Timing for Switching Feeding Speed .................................................. 8- 9
8.3.4 Reversing Accelerating Control of Large Size Paper ............................................................................................ 8- 11
8.4 Detecting Jams .........................................................................................................................................8- 12
8.4.1 Delay Jams............................................................................................................................................................ 8- 12
8.4.1.1 Delay Jam for Those Other Than the Pickup Unit ................................................................................................................. 8- 12
8.4.1.2 Delay Jam for the Pickup Unit................................................................................................................................................ 8- 13
8.4.2 Stationary Jams..................................................................................................................................................... 8- 13
8.4.2.1 Common Stationary Jam ....................................................................................................................................................... 8- 13
8.4.2.2 Stationary Jam at Power-On.................................................................................................................................................. 8- 13
8.4.3 Other Jams ............................................................................................................................................................ 8- 14
8.4.3.1 Size Difference Jam............................................................................................................................................................... 8- 14
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