Samsung ML-3750ND 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 ML-3750ND 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.
To see what contain, please read 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 Print Engine
2.1.2.2. Controller and Software
2.1.2.3. Paper Handling
2.1.2.4. Consumables
2.1.2.5. Reliability and Service
2.1.2.6. Maintenance part
2.1.2.7. Environment
2.1.3. Model Comparison Table
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. Toner cartridge
2.2.4.3. Fuser unit
2.2.4.4. LSU (Laser Scanning Unit)
2.2.5. Hardware Configuration
2.2.5.1. Main board
2.2.5.2. OPE board
2.2.5.3. DIMM PBA – Optional
2.2.5.4. SCF board – Optional
2.2.5.5. SMPS board
2.2.5.6. HVPS board
2.2.6. Engine F/W 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. Preautions 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. Cover
3.3.2. Main board
3.3.3. HVPS board
3.3.4. SMPS board
3.3.5. Laser Scanning Unit (LSU)
3.3.6. Fuser unit
3.3.7. Main Drive unit
3.3.8. Feed drive unit
3.3.9. Pick up/ Regi./ MP Clutch
3.3.10. Pick up roller
3.3.11. Transfer Roller
3.3.12. MP unit
3.3.13. OPE board
3.3.14. Bin-full sensor
3.3.15. Regi_Feed_Empty sensor
3.3.16. Cassette roller (Retard roller)

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 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 (Windows only)
4.1.6.2. Using Samsung Printer Status (Windows only)
4.1.6.3. Using Smart Panel (Macintosh and Linux only)
4.1.6.4. 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
4.2. 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
5.2. Connection Diagram
6. Reference Information
6.1. Tool for Troubleshooting
6.2. Glossary
6.3. The Sample Pattern for the Test
6.4. Selecting a location

ML3750ND ND ML 3750