Canon LBP2900 series Service Manual page 8

Contents
2.5 PICKUP AND FEEDING SYSTEM........................................................................................................... 2- 14
2.5.1 Overview/Configuration..........................................................................................................................................2- 14
2.5.1.1 Outline.................................................................................................................................................................................... 2- 14
2.5.2 Detecting Jams ......................................................................................................................................................2- 14
2.5.2.1 Jam Detection Outline............................................................................................................................................................ 2- 14
2.5.2.2 Delay Jams ............................................................................................................................................................................ 2- 15
2.5.2.3 Stationary Jams ..................................................................................................................................................................... 2- 15
2.5.2.4 Other Jams ............................................................................................................................................................................ 2- 15
2.5.3 Multi-purpose Pickup .............................................................................................................................................2- 15
2.5.3.1 Pickup from the Pickup Tray/Manual Feed Tray.................................................................................................................... 2- 15
2.6 EXTERNAL AND CONTROLS SYSTEM ................................................................................................. 2- 17
2.6.1 Power Supply.........................................................................................................................................................2- 17
2.6.1.1 Power Supply......................................................................................................................................................................... 2- 17
2.6.1.2 Protective Functions .............................................................................................................................................................. 2- 17
2.7 ENGINE CONTROL SYSTEM ................................................................................................................. 2- 19
2.7.1 Video Controller .....................................................................................................................................................2- 19
2.7.1.1 Overview ................................................................................................................................................................................ 2- 19
2.7.1.2 Outline of Operation by Block ................................................................................................................................................ 2- 19
2.7.2 Engine Controller ...................................................................................................................................................2- 20
2.7.2.1 Outline.................................................................................................................................................................................... 2- 20
2.8 FIXING UNIT/DELIVERY SYSTEM.......................................................................................................... 2- 21
2.8.1 Overview/Configuration..........................................................................................................................................2- 21
2.8.1.1 Overview ................................................................................................................................................................................ 2- 21
2.8.1.2 Major Components of the Fixing Assembly ........................................................................................................................... 2- 21
2.8.2 Various Control Mechanisms .................................................................................................................................2- 22
2.8.2.1 Fixing Temperature Control ................................................................................................................................................... 2- 22
2.8.2.2 Protective Functions .............................................................................................................................................................. 2- 24
Chapter 3 DISASSEMBLY AND ASSEMBLY
3.1 EXTERNAL AND CONTROLS SYSTEM ................................................................................................... 3- 1
3.1.1 Rear Cover...............................................................................................................................................................3- 1
3.1.1.1 Removing the Right Cover....................................................................................................................................................... 3- 1
3.1.1.2 Removing the Left Cover ......................................................................................................................................................... 3- 1
3.1.1.3 Removing the Front Cover....................................................................................................................................................... 3- 1
3.1.1.4 Removing the Upper Cover ..................................................................................................................................................... 3- 2
3.1.2 Right Cover ..............................................................................................................................................................3- 2
3.1.2.1 Removing the Right Cover....................................................................................................................................................... 3- 2
3.1.3 Left Cover ................................................................................................................................................................3- 3
3.1.3.1 Removing the Left Cover ......................................................................................................................................................... 3- 3
3.1.4 Upper Cover.............................................................................................................................................................3- 3
3.1.4.1 Removing the Right Cover....................................................................................................................................................... 3- 3
3.1.4.2 Removing the Left Cover ......................................................................................................................................................... 3- 3
3.1.4.3 Removing the Front Cover....................................................................................................................................................... 3- 4
3.1.4.4 Removing the Upper Cover ..................................................................................................................................................... 3- 4
3.1.5 Front Cover ..............................................................................................................................................................3- 5
3.1.5.1 Removing the Right Cover....................................................................................................................................................... 3- 5
3.1.5.2 Removing the Left Cover ......................................................................................................................................................... 3- 5
3.1.5.3 Removing the Front Cover....................................................................................................................................................... 3- 6
3.1.6 Delivery Tray............................................................................................................................................................3- 6
3.1.6.1 Removing the Delivery Tray..................................................................................................................................................... 3- 6
3.1.7 Pickup Tray ..............................................................................................................................................................3- 6
3.1.7.1 Removing the Pickup Tray....................................................................................................................................................... 3- 6
3.1.8 Engine controller board............................................................................................................................................3- 6
3.1.8.1 Removing the Right Cover....................................................................................................................................................... 3- 6
3.1.8.2 Removing the Left Cover ......................................................................................................................................................... 3- 7
3.1.8.3 Removing the Front Cover....................................................................................................................................................... 3- 7
3.1.8.4 Removing the Engine Controller PCB...................................................................................................................................... 3- 7
3.1.9 Video Controller Board.............................................................................................................................................3- 8