Canon LBP5050 Series Service Manual page 47

Contents
3.1 EXTERNAL AND CONTROLS SYSTEM ..................................................................................................................3-1
3.1.1 Rear Cover ................................................................................................................................................................................... 3-1
3.1.1.1 Before Removing the Rear Door.....................................................................................................................................................................3-1
3.1.1.2 Removing the Rear Door ................................................................................................................................................................................3-1
3.1.2 Rear Side Cover ........................................................................................................................................................................... 3-1
3.1.2.1 Before Removing the Rear Side Cover ...........................................................................................................................................................3-1
3.1.2.2 Removing the Rear Side Cover.......................................................................................................................................................................3-1
3.1.3 Rear Upper Cover ........................................................................................................................................................................ 3-1
3.1.3.1 Before Removing the Upper Rear Cover ........................................................................................................................................................3-1
3.1.3.2 Removing the Upper Rear Cover ....................................................................................................................................................................3-1
3.1.4 Right Cover .................................................................................................................................................................................. 3-2
3.1.4.1 Removing the Right Cover..............................................................................................................................................................................3-2
3.1.5 Left Cover .................................................................................................................................................................................... 3-2
3.1.5.1 Removing the Left Cover................................................................................................................................................................................3-2
3.1.6 Upper Cover................................................................................................................................................................................. 3-3
3.1.6.1 Before Removing the Upper Cover Assembly................................................................................................................................................3-3
3.1.6.2 Removing the Upper Cover Assembly ...........................................................................................................................................................3-3
3.1.7 Front Cover .................................................................................................................................................................................. 3-3
3.1.7.1 Removing the Front Door ...............................................................................................................................................................................3-3
3.1.8 Main Drive Unit ........................................................................................................................................................................... 3-5
3.1.8.1 Before Removing the Main Drive Assembly..................................................................................................................................................3-5
3.1.8.2 Removing the Main Drive Assembly..............................................................................................................................................................3-6
3.1.9 Sub Driver Unit............................................................................................................................................................................ 3-8
3.1.9.1 Before Removing the Sub Drive Assembly ....................................................................................................................................................3-8
3.1.9.2 Removing the Sub Drive Assembly ................................................................................................................................................................3-8
3.1.10 Main Motor ................................................................................................................................................................................ 3-8
3.1.10.1 Before Removing the Main Motor ................................................................................................................................................................3-8
3.1.10.2 Removing the Main Motor............................................................................................................................................................................3-8
3.1.11 Operation Panel Unit.................................................................................................................................................................. 3-9
3.1.11.1 Before Removing the Control Panel .............................................................................................................................................................3-9
3.1.11.2 Removing the Control Panel .........................................................................................................................................................................3-9
3.1.12 DC Controller PCB .................................................................................................................................................................. 3-10
3.1.12.1 Before Removing the DC Controller PCB..................................................................................................................................................3-10
3.1.12.2 Removing the DC Controller PCB..............................................................................................................................................................3-10
3.1.12.3 After Replacing the DC controller PCB......................................................................................................................................................3-10
3.1.13 Main Controller PCB ............................................................................................................................................................... 3-10
3.1.13.1 Before Removing the Main Controller PCB...............................................................................................................................................3-10
3.1.13.2 Removing the Main Controller PCB...........................................................................................................................................................3-11
3.1.13.3 After Replacing the Main Controller PCB..................................................................................................................................................3-11
3.1.14 Low-Voltage Power Supply Assembly.................................................................................................................................... 3-11
3.1.14.1 Before Removing the Low-Voltage Power Supply Assembly ...................................................................................................................3-11
3.1.14.2 Removing the Low-Voltage Power Supply Assembly ...............................................................................................................................3-11
3.1.15 Fixing Power Supply Assembly............................................................................................................................................... 3-12
3.1.15.1 Before Removing the Fixing Power Supply Assembly ..............................................................................................................................3-12
3.1.15.2 Removing the Fixing Power Supply Assembly ..........................................................................................................................................3-12
3.1.16 High-voltage PCB .................................................................................................................................................................... 3-13
3.1.16.1 Before Removing the High-Voltage Power Supply PCB ...........................................................................................................................3-13
3.1.16.2 Removing the High-Voltage Power Supply PCB .......................................................................................................................................3-13
3.2 LASER EXPOSURE SYSTEM...................................................................................................................................3-13
3.2.1 Laser Scanner Unit..................................................................................................................................................................... 3-13
3.2.1.1 Before Removing the Laser Scanner Unit ....................................................................................................................................................3-13
3.2.1.2 Removing the Laser Scanner Unit ................................................................................................................................................................3-13
3.2.1.3 After Replacing the laser scanner unit ..........................................................................................................................................................3-15
Contents