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chapter 1 Precautions 1.1 Safety Warning ... 1.2 Caution for safety ... 1.2.1 Toxic material ... 1.2.2 Electric Shock and Fire Safety Precautions ... 1.2.3 Handling Precautions ... 1.2.4 Assembly / Disassembly Precautions ... 1.2.5 Disregarding this warning may cause bodily injury ... 1.3 ESD Precautions ... chapter 2 Product specifications and descriptions 2.1 Speci cations ... 2-1 2.1.1 Product Overview ... 2-1 2.1.2 Features by models ... 2-2 2.1.3 Speci cations ... 2-3 2.1.4 Model Comparison Table ... 2-11 2.2 Product Description ... 2-12 2.2.1 Front View ... 2-12 2.2.2 Rear View ... 2-13 2.2.3 Paper Path ... 2-14 2.2.4 System layout ... 2-15 2.2.5 Hardware con guration ... 2-22 2.2.6 Engine F/W Control Algorithm ... 2-41 2.2.7 S/W Descriptions ... 2-44 chapter 3Disassembly and Reassembly 3.1 General precautions on disassembly ... 3.2 Screws used in the Printer ... 3-1 3-2 3.3 Disassembly procedure ... 3.3.1 Cover ... 3.3.2 Scanner Assy ... 3.3.2.1 OPE board ... 3.3.2.2 CIS Unit ... 3.3.2.3 Scan Motor ... 3.3.2.4 Home Position Sensor ... 3.3.3 DADF Unit /SCX-563xFR / 563xHR / 573xFW) ... 3.3.3.1 DADF Pick up unit ... 3.3.3.2 DADF board ... 3.3.3.3 DADF Motor ... 3.3.4 ADF Unit (SCX-483xFR/FD/HD)) ... 3.3.4.1 Tray Input ... 3.3.4.2 Front / Rear cover ... 3.3.4.3 Paper Path Assy ... 3.3.4.4 ADF Pick up unit ... 3.3.4.5 ADF Motor ... 3.3.5 Middle Cover ... 3.3.6 Main board ... 3.3.7 HVPS board ... 3.3.8 SMPS board ... 3.3.9 Laser Scanning Unit (LSU) ... 3.3.10 Fuser unit ... 3.3.11 Main drive unit ... 3.3.12 Feed drive unit ... 3.3.13 Pick up/ Regi/ MP clutch ... 3.3.14 Pick up roller ... 3.3.15 Transfer roller ... 3.3.16 MP unit ... 3.3.17 Bin-full sensor ... 3.3.18 Regi. / Feed / Empty sensor ... 3.3.19 Cassette roller (Retard roller) ... chapter 4 Alignment and Troubleshooting 4.1 Alignment and Adjustments ... 4.1.1 Control Panel ... 4.1.2 Understanding The Status LED ... 4.1.3 JAM Removal ... 4.1.4 Useful menu item for service ... 4.1.5 Periodic Defective Image ... 4.1.7 Updating Firmware ... 4.1.8 Tech Mode ... 4.2 Troubleshooting ... 4.2.1 Procedure of Checking the Symptoms ... 4.2.2 Error Message and Troubleshooting ... 4.2.3 Image Quality problem ... 4.2.4 Other errors ... 4.2.5 Network problems ... chapter 5System Diagram 5.1 Block Diagram ... 5-1 5.2 Connection Diagram ... 5-3 chapter 6Reference Information 6.1 Tool for Troubleshooting ... 6.2 Acronyms and Abbreviations ... 6.3 A4 ISO 19752 Standard Pattern ... 6.4 Selecting a location ... attached Parts Catalog (Exploded Views & Parts List)