7.1 Power Supply .................................................................................................................................................................7-1

7.1.1 Protection Function ...................................................................................................................................................................... 7-1

7.1.1.1 Protective Mechanisms ...................................................................................................................................................................................7-1

7.1.2 Backup Battery............................................................................................................................................................................. 7-1

7.1.2.1 Battery-backed up Data...................................................................................................................................................................................7-1

7.2 Parts Replacement Procedure.........................................................................................................................................7-1

7.2.1 Front Cover .................................................................................................................................................................................. 7-1

7.2.1.1 Preparation for Detaching the Front Cover .....................................................................................................................................................7-1

7.2.1.2 Detaching the Front Cover ..............................................................................................................................................................................7-1

7.2.2 Rear Cover ................................................................................................................................................................................... 7-1

7.2.2.1 Preparation for Detaching the Rear Cover ......................................................................................................................................................7-1

7.2.2.2 Detaching the Rear Cover ...............................................................................................................................................................................7-1

7.2.3 Right Cover .................................................................................................................................................................................. 7-2

7.2.3.1 Preparation for Detaching the Right Cover.....................................................................................................................................................7-2

7.2.3.2 Detaching the Right Cover..............................................................................................................................................................................7-2

7.2.4 Left Cover .................................................................................................................................................................................... 7-2

7.2.4.1 Preparation for Detaching the Left Cover .......................................................................................................................................................7-2

7.2.4.2 Detaching the Left Cover ................................................................................................................................................................................7-2

7.2.5 External Cover ............................................................................................................................................................................. 7-2

7.2.5.1 Removing the Document Feed Tray and the Paper Tray Cover .....................................................................................................................7-2

7.2.6 Upper Cover................................................................................................................................................................................. 7-3

7.2.6.1 Preparation for Detaching the Upper Cover....................................................................................................................................................7-3

7.2.6.2 Detaching the Upper Cover.............................................................................................................................................................................7-3

7.2.7 Cartridge Cover............................................................................................................................................................................ 7-3

7.2.7.1 Preparation for Detaching the Cartridge Cover ..............................................................................................................................................7-3

7.2.7.2 Detaching the Cartridge Cover........................................................................................................................................................................7-3

7.2.8 Operation Panel Unit.................................................................................................................................................................... 7-4

7.2.8.1 Preparation for Removing the Control Panel Unit..........................................................................................................................................7-4

7.2.8.2 Removing the Control Panel Unit ...................................................................................................................................................................7-4

7.2.9 SCNT Board................................................................................................................................................................................. 7-4

7.2.9.1 Preparation for Removing the SCNT Board ...................................................................................................................................................7-4

7.2.9.2 Removing the SCNT Board ............................................................................................................................................................................7-4

7.2.10 DCNT Board.............................................................................................................................................................................. 7-4

7.2.10.1 Preparation for Removing the DCNT Board ................................................................................................................................................7-4

7.2.10.2 Removing the DCNT Board..........................................................................................................................................................................7-4

7.2.11 High-voitage Power Supply PCB .............................................................................................................................................. 7-5

7.2.11.1 Preparation for Removing the High-Voltage Power Supply Board..............................................................................................................7-5

7.2.11.2 Removing the High-Voltage Power Supply Board .......................................................................................................................................7-5

7.2.12 Powwer Supply PCB.................................................................................................................................................................. 7-6

7.2.12.1 Preparation for Removing the Power Supply Board.....................................................................................................................................7-6

7.2.12.2 Removing the Power Supply Board ..............................................................................................................................................................7-6

7.2.13 Top Sensor ................................................................................................................................................................................. 7-6

7.2.13.1 Preparation for Removing the Paper Leading Edge / the Paper Width Sensor PCB ....................................................................................7-6

7.2.13.2 Removing the Paper Leading Edge/ the Paper Width Sensor PCB ..............................................................................................................7-6

7.2.14 Paper Delivery Sensor................................................................................................................................................................ 7-6

7.2.14.1 Preparation for Removing the Paper Delivery Sensor PCB..........................................................................................................................7-6

7.2.14.2 Removing the Paper Delivery Sensor PCB...................................................................................................................................................7-6

7.2.15 Toner Sensor .............................................................................................................................................................................. 7-6

7.2.15.1 Preparation for Removing the Toner Sensor.................................................................................................................................................7-6

7.2.15.2 Removing the Toner Sensor..........................................................................................................................................................................7-7

7.2.16 Paper Width Sensor.................................................................................................................................................................... 7-7

7.2.16.1 Preparation for Removing the Paper Width Sensor PCB..............................................................................................................................7-7

7.2.16.2 Removing the Paper Width Sensor PCB.......................................................................................................................................................7-7

Contents

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