Samsung SCX-4021S SCX-4321NS SCX-4521FS SCX-4521NS SCX-4521HS SCX-4650 SCX-4650N SCX-4655F SCX-4655FN SCX-4655HN 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 SCX-4021S SCX-4321NS SCX-4521FS SCX-4521NS SCX-4521HS SCX-4650 SCX-4650N SCX-4655F SCX-4655FN SCX-4655HN 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 SPECIFICATION AND DESCRIPTION
2.1. Product Specification
2.1.1. Product Overview
2.1.2. Specifications
2.1.2.1. General Print Engine
2.1.2.2. Copier
2.1.2.3. Scan Specification
2.1.2.4. Fax (SCX-465xF_465xFN_465xHN_4521FS_4521NS_4521HS only)
2.1.2.5. Controller and Software
2.1.2.6. Paper Handling
2.1.2.7. Supplies
2.1.2.8. Maintenance Part
2.1.2.9. Reliability and Service
2.1.2.10. Environment
2.1.3. Model Comparison Table
2.2. System Overview
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. Transfer Roller
2.2.4.3. Drive Unit
2.2.4.4. Fuser Unit
2.2.4.5. LSU (Laser Scanner Unit)
2.2.4.6. Toner Cartridge
2.2.5. Hardware configuration
2.2.5.1. Main board
2.2.5.2. OPE board
2.2.5.3. Fax board (4-in-1 model only)
2.2.5.4. SMPS/HVPS board
2.2.5.5. Electrical Parts Location
2.2.6. Engine F/W Contol 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. Cover
3.3.2. OPE Unit
3.3.3. Scanner Unit
3.3.4. ADF unit
3.3.5. CIS (Contact Image Sensor) Unit
3.3.6. Middle Cover
3.3.7. Main board
3.3.8. Fax board
3.3.9. SMPS_HVPS board
3.3.10. Fuser Unit
3.3.11. Transfer roller
3.3.12. LSU
3.3.13. Feed Sensor PBA
3.3.14. Main Drive Unit
3.3.15. Pick Up Solenoid
3.3.16. Pick up 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. JAM removal
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 (Windows and Macintosh only)
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
4.2. 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. RREFERENCE INFORMATION
6.1. Tool for Troubleshooting
6.2. Glossary
6.3. The Sample Pattern for the Test

SCX4021S SCX4321NS SCX4521FS SCX4521NS SCX4521HS SCX4650 SCX4650N SCX4655F SCX4655FN SCX4655HN SCX 4021S SCX 4321NS SCX 4521FS SCX 4521NS SCX 4521HS SCX 4650 SCX 4650N SCX 4655F SCX 4655FN SCX 4655HN HN NS S FS