Contents9.2.1 Power Supply .............................................................................................................................................. 9- 29.2.2 Protection Function ..................................................................................................................................... 9- 49.2.3 Backup Battery ............................................................................................................................................ 9- 49.2.4 Energy-Saving Function.............................................................................................................................. 9- 89.3 Parts Replacement Procedure .......................................................................................................................... 9- 109.3.1 Control Panel............................................................................................................................................. 9- 109.3.2 Analog Processor PCB .............................................................................................................................. 9- 109.3.3 Removing the DC Controller PCB............................................................................................................ 9- 129.3.4 Image Processor PCB................................................................................................................................ 9- 169.3.5 Printer Controller PCB .............................................................................................................................. 9- 179.3.6 NCU PCB ............................................................................................................................................... 9- 179.3.7 Modular Jack PCB .................................................................................................................................... 9- 189.3.8 Removing the Printer Power Supply PCB ................................................................................................ 9- 189.3.9 Relay PCB ................................................................................................................................................. 9- 239.3.10 Humidity Sensor...................................................................................................................................... 9- 259.3.11 Reader Unit Slide Detecting Switch........................................................................................................ 9- 279.3.12 Toner Supply Cover Switch .................................................................................................................... 9- 309.3.13 Fans ......................................................................................................................................................... 9- 329.3.14 Motor of Main Drive Assembly .............................................................................................................. 9- 369.3.15 Right Door............................................................................................................................................... 9- 41Chapter 10 Original Feeding System10.1 Basic Construcion .......................................................................................................................................... 10- 110.1.1Outline ..................................................................................................................................................... 10- 110.2 Basic Operation ............................................................................................................................................. 10- 210.2.1Picking Up and Moving Originals ........................................................................................................... 10- 210.2.2Moving Down the Original Pickup Roller and Moving Up the Original Stopper................................... 10- 210.3 Detection Jams............................................................................................................................................... 10- 410.3.1Outline ..................................................................................................................................................... 10- 410.3.2Types of Jams .......................................................................................................................................... 10- 410.4 Parts Replacement Procedure ........................................................................................................................ 10- 610.4.1 ADF ......................................................................................................................................................... 10- 610.4.2 ADF Drive Unit....................................................................................................................................... 10- 710.4.3 ADF Motor Unit...................................................................................................................................... 10- 910.4.4 Feeding Outside Guide.......................................................................................................................... 10- 1210.4.5 Separation Roller Unit........................................................................................................................... 10- 1410.4.6 Separation Roller .................................................................................................................................. 10- 1710.4.7 Pickup Roller ........................................................................................................................................ 10- 2110.4.8 Original Separation Pad ........................................................................................................................ 10- 2410.4.9 Registration Roller ............................................................................................................................... 10- 2510.4.10 White Roller ....................................................................................................................................... 10- 2810.4.11 Feed Roller ......................................................................................................................................... 10- 3010.4.12 Original Feed Roller ........................................................................................................................... 10- 3210.4.13 Original Delivery Roller...................................................................................................................... 10- 3610.4.14 Original Sensor.................................................................................................................................... 10- 3910.4.15 Registration Sensor ............................................................................................................................. 10- 4210.4.16 Original Delivery Sensor..................................................................................................................... 10- 4410.4.17 Slide Guide .......................................................................................................................................... 10- 47