Samsung ProXpress M3370, M3870, M4070 Series Service Manual

This Samsung service manual cover models:
ProXpress SL-M3370FD, SL-M3375FD, SL-M3870FD, SL-M3870FW, SL-M3875FD, SL-M3875FW, SL-M4070FR, SL-M4070FW, SL-M4070FX, SL-M4072FD, SL-M4075FR, SL-M4075FW, SL-M4075FX.

This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Samsung ProXpress.
You can print, zoom or read any diagram, picture or page from this Service Manual. Every chapter on this manual is fully detailed and contain all the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of Samsung MFP.
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
2.1. Specifications
2.1.1. Product Overview
2.1.2. Specifications
2.1.2.1. General
2.1.2.2. Print
2.1.2.3. Copier
2.1.2.4. Scanner
2.1.2.5. Fax
2.1.2.6. Controller and Software
2.1.2.7. Paper Handling
2.1.2.8. Consumables
2.1.2.9. Maintenance Part
2.2. Product Description
2.2.1. Front View
2.2.2. Rear View
2.2.3. Paper Path
2.2.4. System layout
2.2.4.1. Feeding Part
2.2.4.2. Image Creation
2.2.4.3. Fuser unit
2.2.4.4. LSU (Laser Scanning Unit)
2.2.4.5. Drive Unit
2.2.5. Hardware configuration
2.2.5.1. Main Controller (M337x_M387x_M407xFR_M4072FD)
2.2.5.2. Main Controller (M407xFX)
2.2.5.3. OPE Controller
2.2.5.4. SO-DIMM PBA
2.2.5.5. WLAN(M387xFW model only)
2.2.5.6. ADF and RADF SUB PBA
2.2.5.7. SCF PBA – Optional
2.2.5.8. CRUM PBA
2.2.5.9. Fax Board
2.2.5.10. SMPS Board
2.2.5.11. HVPS board
2.2.6. Engine Firmware Control Algorithm
2.2.6.1. Feeding
2.2.6.2. Transfer
2.2.6.3. Fusing
2.2.6.4. LSU
2.2.7. Software Descriptions
2.2.7.1. Software system overview
2.2.7.2. Architecture
2.2.7.3. Data and Control Flow

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. Screws used in the printer
3.3. Replacing the Main SVC parts
3.3.1. Left and Right Cover
3.3.2. Front Cover
3.3.3. ADF or RADF Unit
3.3.4. OPE Unit
3.3.5. Platen Unit
3.3.6. Top-Middle Cover
3.3.7. Fax Board
3.3.8. Middle and Inner Cover
3.3.9. Main Board
3.3.10. HVPS board
3.3.11. SMPS Board
3.3.12. Laser Scanning Unit (LSU)
3.3.13. Fuser Unit
3.3.14. Main Drive Unit
3.3.15. Feed Drive Unit
3.3.16. Pick Up_Regi_MP Clutch
3.3.17. Pick-Up Roller
3.3.18. Transfer Roller
3.3.19. MP Unit
3.3.20. Bin-full sensor
3.3.21. Regi_Feed_Empty Sensor
3.3.22. Reverse Roller
3.3.23. SCF(Second Cassette Feeder) Unit
3.3.23.1. SCF Right Cover
3.3.23.2. SCF Main Board
3.3.23.3. SCF Main Motor
3.3.23.4. SCF Clutch
3.3.23.5. SCF pick up_forward roller
3.3.23.6. SCF Reverse Roller
3.3.23.7. SCF Main Drive Unit
3.3.23.8. SCF Lift Assy
3.3.23.9. SCF Pick-Up Unit
3.3.23.10. SCF Pick-Up_Empty_Feed Sensor

4. ALIGNMENT AND TROUBLESHOOTING
4.1. Alignment and Adjustments
4.1.1. Control Panel
4.1.2. Understanding The Status LED
4.1.3. Clearing Jams
4.1.3.1. Clearing original document jams
4.1.3.2. Clearing paper jams
4.1.4. Useful menu item for service
4.1.5. Periodic Defective Image
4.1.6. Useful management tools
4.1.6.1. Using Samsung Easy Printer Manager
4.1.6.2. Using Samsung Printer Status (Windows only)
4.1.6.3. Using SyncThru Web Service (SWS)
4.1.7. Updating Firmware
4.1.7.1. Update the firmware by using the USB port
4.1.7.2. Update the firmware by using the network
4.1.8. Tech Mode
4.1.8.1. Entering the Tech Mode
4.1.8.2. Tech Mode Menu
4.1.8.3. Tech Mode Menu description
4.2. Troubleshooting
4.2.1. Procedure of checking the symptoms
4.2.1.1. Basic Check List
4.2.2. Error Code and Troubleshooting
4.2.3. Image quality problem
4.2.4. Other errors

5. SYSTEM DIAGRAM
5.1. Block Diagram (M337xFD_M387xFD_M387xFW_M407xFR_M4072FD)
5.2. Block Diagram (M407xFX)
5.3. Connection Diagram (M337xFD_M387xFD_M387xFW_M407xFR_M4072FD)
5.4. Connection Diagram (M407xFX)

6. REFERENCE INFORMATION
6.1. Tool for Troubleshooting
6.2. Glossary
6.3. The Sample Pattern for the Test
6.4. Model Name and Code
6.5. Revision History

M3370FD M3375FD M3870FD M3870FW M3875FD M3875FW M4070FW M4070FX M4072FD M4075FW M4070FR M4075FR M4075FX SLM3370FD SLM3375FD SLM3870FD SLM3870FW SLM3875FD SLM3875FW SLM4070FW SLM4070FX SLM4072FD SLM4075FW SLM4070FR SLM4075FR SLM4075FX SL-M3370FD SL-M3375FD SL-M3870FD SL-M3870FW SL-M3875FD SL-M3875FW SL-M4070FW SL-M4070FX SL-M4072FD SL-M4075FW SL-M4070FR SL-M4075FR SL-M4075FX M337x M387x 407x