Power Cord... ... 4 Harness connection table... ... 5 Thumbnail... 8 1. MAIN... ...10 2. COVER...12 3. COVER-FRONT ASSY... ...14 4. COVER-MP... ...16 5. COVER-MIDDLE ASSY...18 6. COVER-MIDDLE REAR ASSY...20 7. FRAME... ...22 8. FRAME_BOTTOM... ...24 9. FRAME LEFT... ...26 10. FRAME RIGHT... ...28 11. DRIVE_FUSER-BRACKET...30 12. DRIVE FEED...32 13. FUSER... ...34 14. ELA UNIT-REVERSE... ...37 15. ELA UNIT-MOTOR BRKT... ...39 16. ELA UNIT-FRAME REV... ...41 17. MEA UNIT-COVER TOP... ...43 18 Scanner 45 19. OPE...47 20. DADF... ...49 21. DADF-COVER PLATEN... ...51 22. DADF STACKER-TX...53 23. DADF-UPPER... ...55 24. DADF-COVER OPEN... ...57 25. DADF-LOWER... ...59 26. PLATEN... ...61 27. PLATEN-UPPER... ...63 28. PLATEN-LOWER... ...65 29. CASSETTE...67

chapter 1 Precautions 1.1 Safety warning... ... 1.2 Caution for safety... 1.3 ESD precautions... ... 1.4 Super capacitor or lithium battery precautions... chapter 2 Product Specification and feature 2.1 Product summary... 2.2 Specifications... ... 2.2.1 General Printer Engine... 2.2.2 Controller & S/W... ... 2.2.3 Interface... 2.2.4 Scan... ... 2.2.5 Copy... ... 2.2.6 FAX... 2.2.7 Paper Handling... 2.2.8 Consumables... 2.2.9 Maintenance parts... ... 2.2.10 Reliability & Service... ... 2.2.11 Environment... 2.2.12 Packing & Accessory... 2.2.13 Option... ... 2.3 Model Comparison... ... 2.4 Product configuration... ... 2.4.1 Printer external... ... 2.4.2 Hardware configuration... ... 2.4.3 Feeding Section... ... 2.4.4 LSU... 2.4.5 Fuser Unit... ... 2.4.6 PTB(Paper Transfer Belt) Unit... ... 2.4.7 Motors...2.4.8 Sensors... ... chapter 3 Maintenance and disassembly 3.1 Precautions when replacing parts... 3.1.1 Precautions when assembling and disassembling... ... 3.1.2 Preautions when handling PBA... ... 3.1.3 Releasing Plastic Latches... ... 3.2 Replacing a Maintenance Parts ... ... 3.2.1 Fuser Unit ... 3.2.2 Pick up roller ... 3.3 General Disassembly ... 3.3.1 Cover Unit... ... 3.3.2 Scanner Ass’y... ... 3.3.3 DADF... ... 3.3.4 Reverse Ass’y... ... 3.3.5 Cover Middle Ass’y... ... 3.3.6 HVPS Board... ... 3.3.7 Main board... 3.3.8 SMPS Board... 3.3.9 Fuser Control Board... 3.3.10 LSU... ... 3.3.11 SOLENOID... ... 3.3.12 Drive-Exit Bracket... ... 3.3.13 Drive-Fuser Bracket... ... 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 Menu Overview... 4.1.4 Tech Mode... 4.1.5 Firmware Upgrade... ... 4.2 Troubleshooting... 4.2.1 Procedure of Checking the Symptoms... ... 4.2.2 Error code and message... 4.2.3 Feeding Problems and solutions... ... 4.2.4 Image Quality Problems and solutions... ... 4.2.5 Common Problems and solutions... ... 4.2.6 Network problems and solutions... 4.2.7 Copy Problems... 4.2.8 OPE Problems... ... chapter 5 System diagram 5.1 Block Diagram... ... 5.1.1 6250FX... ... 5.1.2 6220FX... ... 5.1.3 OPE... 5.2 Connection diagram... chapter 6 Reference information 6.1 Tools for Troubleshooting... ... 6.2 Acronyms and Abbreviations... ... 6.3 Select a location for the Printer 6.4 A4 ISO 19752 Standard Pattern...