Canon i-SENSYS MF4300dn Service Manual page 111

Contents
9.1 Control Panel..................................................................................................................................................................9-1
9.1.1 Outline.......................................................................................................................................................................................... 9-1
9.2 Power Supply .................................................................................................................................................................9-1
9.2.1 Power Supply ............................................................................................................................................................................... 9-1
9.2.1.1 Power Supply Route........................................................................................................................................................................................9-1
9.2.2 Protection Function ...................................................................................................................................................................... 9-1
9.2.2.1 Protecting Function .........................................................................................................................................................................................9-1
9.3 Parts Replacement Procedure.........................................................................................................................................9-2
9.3.1 Front Cover .................................................................................................................................................................................. 9-2
9.3.1.1 Removing the Front Cover..............................................................................................................................................................................9-2
9.3.2 Rear Cover ................................................................................................................................................................................... 9-2
9.3.2.1 Preparation for Removing the Rear Cover......................................................................................................................................................9-2
9.3.2.2 Removing the Rear Cover ...............................................................................................................................................................................9-2
9.3.3 Right Cover .................................................................................................................................................................................. 9-2
9.3.3.1 Removing the Right Cover..............................................................................................................................................................................9-2
9.3.4 Left Cover .................................................................................................................................................................................... 9-3
9.3.4.1 Removing the Left Cover................................................................................................................................................................................9-3
9.3.5 Upper Cover................................................................................................................................................................................. 9-4
9.3.5.1 Preparation for Removing the Upper Cover ...................................................................................................................................................9-4
9.3.5.2 Removing the Upper Cover ............................................................................................................................................................................9-4
9.3.6 Cartridge Cover............................................................................................................................................................................ 9-4
9.3.6.1 Preparation for Removing the Printer Cover ..................................................................................................................................................9-4
9.3.6.2 Removing the Printer Cover............................................................................................................................................................................9-4
9.3.7 Operation Panel Unit.................................................................................................................................................................... 9-4
9.3.7.1 Removing the Control Panel Unit ...................................................................................................................................................................9-4
9.3.8 SCNT Board................................................................................................................................................................................. 9-5
9.3.8.1 Preparation for Removing the SCNT PCB .....................................................................................................................................................9-5
9.3.8.2 Removing the SCNT PCB ..............................................................................................................................................................................9-5
9.3.8.3 Actions At Replacing the SCNT PCB ............................................................................................................................................................9-5
9.3.9 DCNT Board ................................................................................................................................................................................ 9-6
9.3.9.1 Preparation for Removing the DCNT PCB.....................................................................................................................................................9-6
9.3.9.2 Removing the DCNT PCB..............................................................................................................................................................................9-6
9.3.10 Power Supply PCB .................................................................................................................................................................... 9-7
9.3.10.1 Preparation for Removing the Power Supply PCB .......................................................................................................................................9-7
9.3.10.2 Removing the Power Supply PCB ................................................................................................................................................................9-7
9.3.11 High-voltage Power Supply Board ............................................................................................................................................ 9-7
9.3.11.1 Preparation for Removing the High Voltage PCB ........................................................................................................................................9-7
9.3.11.2 Removing the High Voltage PCB .................................................................................................................................................................9-8
Contents