Samsung MultiXpress K4350LX K4300LX K4250LX K4250RX Service Manual


Accurate, clear and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Present service manual Samsung MultiXpress K4350LX K4300LX K4250LX K4250RX contain clear instructions and procedures on how to fix the problems occurring in your equipment.
The information contained in this repair manual is necessary for the repair, but also prevention, resulting in a longer life of your equipment.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
Table of contents:

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 and Disassembly precautions
1.2.5. Disregarding this warning may cause bodily injury
1.3. ESD precautions

2) PRODUCT SPECIFICATIONS AND DESCRIPTION
2.1. Product Overview
2.2. Specifications
2.2.1. General Specification
2.2.2. Print Specifications
2.2.3. Scan specification
2.2.4. Copy specification
2.2.5. Fax specification
2.2.6. Paper Handling specification
2.2.7. Software and Solution specification
2.2.8. Supplies
2.2.9. Maintenance Parts
2.2.10. Option
2.3. Machine External View
2.4. Feeding System
2.4.1. Feeding System Overview
2.4.2. Main Components and functions
2.4.3. Cassette
2.4.4. Pick-Up Unit
2.4.5. Registration Unit
2.4.6. MPF(Multi-Purpose Feeder) Unit
2.5. Image Creation
2.5.1. Printing process overview
2.5.2. Imaging Unit
2.5.2.1. Imaging Unit overview
2.5.2.2. Drum Drive
2.5.2.3. Developer Unit
2.6. Fuser unit
2.6.1. Fuser Unit overview
2.6.2. Fuser unit drive
2.6.3. Fuser unit temperature control
2.7. Laser Scanning Unit (LSU)
2.7.1. LSU overview
2.7.2. Laser Scanning Optical path
2.7.3. Laser synchronizing detectors
2.8. Drive System
2.8.1. Drive Motors
2.8.2. Main Drive Unit (OPC_DEVE_Regi_MP_Feed)
2.8.3. Pick Up Drive
2.8.4. Duct Drive
2.8.5. Fuser/ Exit Drive
2.8.6. Toner Supply Drive
2.9. Scanner System
2.9.1. Scanner System Overview
2.9.2. Scanning System Components
2.9.3. Caution for moving the scanner
2.10. Dual Scan Document Feeder(DSDF) for K4350 and K4300
2.10.1. DSDF overview
2.10.2. Electrical parts location
2.10.3. DSDF Drive System
2.10.3.1. DSDF Original Pick-Up Assembly
2.10.3.2. DSDF Original Regi. Drive
2.10.3.3. Original Scanning and Feed-Out Drive
2.11. Reverse Automatic Document Feeder(RADF) for K4250
2.11.1. RADF overview
2.11.2. Electrical parts location
2.11.3. RADF Drive System
2.11.3.1. RADF Original Pick-Up Assembly
2.11.3.2. RADF Registration (Regi) Drive Assembly
2.11.3.3. RADF Feed Drive Assembly
2.11.3.4. RADF Exit Drive Assembly
2.11.3.5. Original Return Drive
2.12. Hardware Configuration
2.12.1. Main Controller (Main Board)
2.12.2. OPE HUB PBA
2.12.3. SMPS (Switching Mode Power Supply) board
2.12.4. Fuser Drive Board (FDB)
2.12.5. HVPS board
2.12.6. Eraser PBA
2.12.7. Fuser PBA
2.12.8. Waste Sensor PBA
2.12.9. CRUM PBA
2.12.10. Toner CRUM Joint PBA
2.12.11. Paper Size sensor PBA
2.12.12. CTD PBA
2.12.13. OPE Unit
2.13. Cassette Heater
2.14. DCF Unit
2.15. Inner Finisher

3) DISASSEMBLY AND REASSEMBLY
3.1. Precautions when replacing parts
3.1.1. Precautions when assembling and disassembling
3.1.2. Precautions when handling PBA
3.1.3. Releasing Plastic Latches
3.2. Maintenance
3.2.1. Machine Cleaning for maintenance
3.2.1.1. Cleaning the scan glass
3.2.1.2. Cleaning the DSDF white bar_CIS
3.2.2. Replacing the maintenance part
3.2.2.1. Drum Unit
3.2.2.2. Development(Deve) Unit
3.2.2.3. Fuser Unit
3.2.2.4. Transfer roller
3.2.2.5. Pick Up_Reverse_Forward Roller
3.2.2.6. MP Pick Up_Reverse_Forward roller
3.2.2.7. DSDF Pick-up roller Assy
3.2.2.8. DSDF reverse roller
3.2.2.9. RADF pick up roller Assy
3.2.2.10. RADF reverse roller Assy
3.3. Replacing the main SVC part
3.3.1. Left cover
3.3.2. Rear Cover
3.3.3. LSU
3.3.4. Temperature Sensor
3.3.5. HVPS board
3.3.6. OPE Unit
3.3.7. Main board
3.3.8. Deve Fan
3.3.9. SMPS board
3.3.10. FDB board
3.3.11. Fuser_Exit Drive Unit
3.3.12. Main Drive Unit
3.3.13. Pick-up Drive unit
3.3.14. Toner Duct Drive Unit
3.3.15. Toner Supply Drive Unit
3.3.16. Toner Duct
3.3.17. Waste Toner Container sensor
3.3.18. Auto Size Sensor
3.3.19. Exit Unit
3.3.20. Side Unit
3.3.20.1. Fuser out sensor
3.3.20.2. Temperature sensor and Duplex sensor
3.3.20.3. MP unit
3.3.21. Pick-Up Unit and sensor
3.3.22. Feed sensor 1
3.3.23. Feed Unit and Feed sensor 2
3.3.24. Registration(Regi.) Unit
3.3.25. DSDF Unit
3.3.25.1. DSDF board
3.3.25.2. DSDF main motor
3.3.25.3. DSDF paper length sensor
3.3.26. RADF Unit
3.3.26.1. RADF Board
3.3.26.2. RADF Stacker
3.3.27. Scanner Unit(Platen Unit)
3.3.27.1. Scan Glass
3.3.27.2. LED Lamp Module
3.3.27.3. Scanner Imaging Unit
3.3.27.4. Scan Joint Board
3.3.27.5. APS Sensor
3.3.28. Side Cover Open Switch
3.3.29. Front Cover Open Switch
3.3.30. HDD
3.3.31. Card Reader or NFC Kit Installation
3.3.31.1. Installing the Card Reader or NFC Kit on Working table(BYOD) table
3.3.31.2. Installing the Card Reader or NFC Kit inside Cover-Scan Front
3.3.32. Installing the Working table(BYOD) table
3.3.33. DCF (Double Cassette Feeder)
3.3.33.1. DCF main board
3.3.33.2. DCF Feed Motor
3.3.33.3. DCF Pick Up Motor
3.3.34. Finisher
3.3.34.1. Entrance Sensor
3.3.34.2. Entrance Motor
3.3.34.3. Exit Sensor
3.3.34.4. Exit Motor
3.3.34.5. Sub Paddle Shaft Sub Assy
3.3.34.6. Front Jogger Motor
3.3.34.7. Front Jogger Home Sensor
3.3.34.8. Rear Jogger Motor
3.3.34.9. Rear Jogger Home Sensor
3.3.34.10. Stapler
3.3.34.11. Traverse Home Sensor
3.3.34.12. Traverse Motor
3.3.34.13. Stacker Motor
3.3.34.14. Stacker Encoder Sensor
3.3.34.15. Stacker Lower Limit Switch
3.3.34.16. Stack Beam Sensor
3.3.34.17. Stack Position Sensor
3.3.34.18. Paper Holding Lever Solenoid
3.3.34.19. Paper Support Motor
3.3.34.20. Paper Support Home Sensor
3.3.34.21. Ejector Motor Assy
3.3.34.22. Main Paddle Motor
3.3.34.23. Main Paddle Home Sensor
3.3.34.24. Main Paddle
3.3.34.25. Ejector Assy
3.3.34.26. Punch Dust Full Sensor
3.3.34.27. Door Switch
3.3.34.28. Top Door Switch

4) TROUBLESHOOTING
4.1. Control panel
4.1.1. Display screen and useful buttons
4.1.1.1. Menu navigation
4.1.1.2. Home Screen Overview
4.1.1.3. Customizing your home screen
4.1.1.4. Notification Bar
4.2. Understanding the LEDs
4.3. Updating Firmware
4.3.1. Updating from the Printer Control Panel
4.3.2. Updating from the Network
4.4. JAM removal
4.4.1. Clearing original document jams
4.4.2. Clearing paper jams
4.5. Service Mode (Tech Mode)
4.5.1. Entering the Service Mode
4.5.2. Service Mode Menu Tree
4.5.3. Information
4.5.3.1. General
4.5.3.2. Supply Status
4.5.3.3. Software Version
4.5.3.4. Service Hours
4.5.3.5. Fault Log
4.5.3.6. Print Reports
4.5.3.7. Export Reports
4.5.4. Maintenance Counts
4.5.4.1. Fault Count
4.5.4.2. Jam Count
4.5.4.3. Part Replacement Count
4.5.5. Diagnostics
4.5.5.1. Engine Diagnostics
4.5.5.2. Fax Diagnostics
4.5.5.3. Scanner Diagnostics
4.5.5.4. Adjustment
4.5.5.5. Image Management
4.5.5.6. Print Test Patterns
4.5.6. Service Functions
4.5.6.1. Main Memory Clear
4.5.6.2. Hard Disk Maintenance
4.5.6.3. Count Setting of Large Page
4.5.6.4. Network Port
4.5.6.5. Debug Log
4.5.6.6. Capture Log
4.5.6.7. Network Packet Capture
4.5.6.8. System Recovery
4.5.6.9. TR Control Mode
4.5.6.10. Clear System Cache
4.5.6.11. Hibernation
4.5.6.12. Paper Low Warning Message
4.5.6.13. Part Replacement Alert
4.5.6.14. FDI
4.5.6.15. EIUL (End of Image Unit Life)
4.5.6.16. Dealer ID
4.5.6.17. Envelope Rotate
4.5.6.18. Drain
4.6. Error Code and Troubleshooting
4.7. Image quality problems and solutions
4.7.1. Vertical Black Lines
4.7.2. Vertical Light or White Lines
4.7.3. Horizontal Periodic Black Lines, Dots
4.7.4. Horizontal Periodic Light/Dark Lines, Dots
4.7.5. Blurred image
4.7.6. Foggy image
4.7.7. Light image
4.7.8. Uneven pitch and jitter image
4.7.9. Skewed image
4.7.10. Poor fusing performance
4.7.11. Stain on the paper back side
4.8. Other Errors
4.8.1. Image problem
4.8.2. Fuser problem
4.8.3. Scanner and Document Feeder problem
4.8.4. Drive unit problem
4.8.5. Feeding system problem
4.8.6. LSU problem
4.8.7. Software problem
4.8.8. Electrical circuit problem
4.9. Adjusting the ADF(DSDF_RADF) skew
4.10. SPDS (Smart Printer Diagnostic System) Application
4.10.1. SPDS App Installation and Login
4.10.1.1. SPDS App Installation
4.10.1.2. User Registration Request
4.10.1.3. Change_Reset Password
4.10.1.4. Login
4.10.1.5. Select Connect Method
4.10.1.6. Consent to customer information
4.10.2. SPDS Menu Introduction
4.10.2.1. Error Mode
4.10.2.2. Diagnosis Mode
4.10.2.3. Test Mode
4.10.2.4. Information Mode
4.10.2.5. Service Mode
4.10.3. Corrective Upload
4.10.4. Exceptions

5) CONNECTION DIAGRAM
5.1. Connection Diagram (FUSER_EXIT)
5.2. Connection Diagram (PICK UP_PH DRIVE_SIDE)
5.3. Connection Diagram (LSU_HVPS)
5.4. Connection Diagram (Toner)
5.5. Connection Diagram (FDB_SMPS)
5.6. Connection Diagram (UI)
5.7. Connection Diagram (FRONT_OPC)
5.8. Connection Diagram (Scanner)
5.9. Connection Diagram (Double Cassette Feeder)
5.10. Connection Diagram (FAX_DUAL NW_FDI)

6) REFERENCE INFORMATION
6.1. Tools for Troubleshooting
6.2. Glossary
6.3. Model Name and Code
6.4. Document Revision List

SL-K4350LX SL-K4300LX SL-K4250LX SL-K4250RX SLK4350LX SLK4300LX SLK4250LX SLK4250RX SL K4350LX SL K4300LX SL K4250LX SL K4250RX MultiXpressK4350LX MultiXpressK4300LX MultiXpressK4250LX MultiXpressK4250RX MultiXpress K4