Canon iR C1020 Series Service Manual page 235

Contents
11.1 DC Controller.............................................................................................................................................................11-1
11.1.1 Overview.................................................................................................................................................................................. 11-1
11.1.2 Operation of Each Block.......................................................................................................................................................... 11-2
11.1.3 Fan/Motor Control ................................................................................................................................................................... 11-2
11.1.4 Drum motor failure detection................................................................................................................................................... 11-3
11.1.5 ETB motor failure detection .................................................................................................................................................... 11-3
11.1.6 Fixing motor failure detection ................................................................................................................................................. 11-3
11.1.7 Main Unit Fan Failure Detection ............................................................................................................................................. 11-3
11.1.8 Duplex Fan Failure Detection .................................................................................................................................................. 11-3
11.2 Control Panel..............................................................................................................................................................11-4
11.2.1 Overview.................................................................................................................................................................................. 11-4
11.3 Counter.......................................................................................................................................................................11-5
11.3.1 Overview.................................................................................................................................................................................. 11-5
11.3.2 Timing of Increasing the Count ............................................................................................................................................... 11-5
11.4 Power Supply .............................................................................................................................................................11-6
11.4.1 Power Supply ........................................................................................................................................................................... 11-6
11.4.1.1 Low-voltage Power Unit .............................................................................................................................................................................11-6
11.4.2 Protection Function .................................................................................................................................................................. 11-7
11.4.2.1 Protective Function .....................................................................................................................................................................................11-7
11.4.2.2 Safety...........................................................................................................................................................................................................11-7
11.4.3 Energy-Saving Function .......................................................................................................................................................... 11-7
11.4.3.1 Overview .....................................................................................................................................................................................................11-7
11.5 Parts Replacement Procedure.....................................................................................................................................11-9
11.5.1 Front Cover .............................................................................................................................................................................. 11-9
11.5.1.1 Before Removing the Front Cover Unit......................................................................................................................................................11-9
11.5.1.2 Removing the Front Cover Unit..................................................................................................................................................................11-9
11.5.2 Front Upper Cover 1 .............................................................................................................................................................. 11-10
11.5.2.1 Before Removing Front upper Cover 1.....................................................................................................................................................11-10
11.5.2.2 Removing Front Upper Cover 1................................................................................................................................................................11-10
11.5.3 Rear Cover ............................................................................................................................................................................. 11-11
11.5.3.1 Removing the Rear Cover Unit.................................................................................................................................................................11-11
11.5.4 Right Cover ............................................................................................................................................................................ 11-11
11.5.4.1 Before Removing the Right Cover............................................................................................................................................................11-11
11.5.4.2 Removing the Right Cover........................................................................................................................................................................11-11
11.5.5 Left Cover .............................................................................................................................................................................. 11-13
11.5.5.1 Before Removing the Left Cover ..............................................................................................................................................................11-13
11.5.5.2 Removing the Left Cover..........................................................................................................................................................................11-13
11.5.6 Delivery Tray Cover .............................................................................................................................................................. 11-14
11.5.6.1 Before Removing the Delivery Tray Cover ..............................................................................................................................................11-14
11.5.6.2 Removing the Delivery Tray Cover ..........................................................................................................................................................11-14
11.5.7 Power Station Cover .............................................................................................................................................................. 11-15
11.5.7.1 Before Removing the Electrical Components Cover ................................................................................................................................11-15
11.5.7.2 Removing the Electrical Components Cover ............................................................................................................................................11-15
11.5.8 Controller Box ....................................................................................................................................................................... 11-15
11.5.8.1 Before Removing the Controller Box .......................................................................................................................................................11-15
11.5.8.2 Removing the Controller Box ...................................................................................................................................................................11-15
11.5.9 Laser Scanner Cover .............................................................................................................................................................. 11-16
11.5.9.1 Before Removing the Laser Scanner Cover..............................................................................................................................................11-16
11.5.9.2 Removing the Laser Scanner Cover..........................................................................................................................................................11-16
11.5.10 Upper Frame Unit ................................................................................................................................................................ 11-18
11.5.10.1 Before Removing the Upper Frame Unit ................................................................................................................................................11-18
11.5.10.2 Removing the Upper Frame Unit............................................................................................................................................................11-18
Contents