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Samsung ML-4550 Printer
Manufacturer:
Model:
ML-4550
Date:
2006
Class:
Type:
SubType:
DIGITAL LASER PRINTER

Information

Series Model: ML-4550 / 4551N / 4551ND - High speed Laser Printer: Up to 43 ppm in A4 (45 ppm in Letter), Duplex: 29 ipm (A4); 30 ipm (Letter) - Resolution: Up to 1200 x 1200 dpi - Marvell 500Mhz - Memory: 128 MB (Max. 512 MB) 128, or 256 MB optional memory available. Use only the Samsung-approved DIMM. 128 MB: ML-MEM150, 256 MB: ML-MEM160 - Option: ML-4550:500-sheet trays, ethernet 10/100 Base TX wired LAN, ethernet 10/100 Base hard disk, duplex unit, DIMM - Toner cartridge: Starter: 10K or 20K pages Consumable: 10K or 20K pages - Duty cycle: Monthly Up to 150,000 pages

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Service Manual
Manual type:
Service Manual
Pages:
185
Size:
12.09 Mbytes (12675975 Bytes)
Language:
english
Revision:
1.0
Manual-ID:
JC-0168R
Date:
unknown
Quality:
Electronic document, no scan, very well readable.
Upload date:
04 October 2015
MD5:
45e39ae49d84c8a0318180ad9cca3fd8
Downloads:
12854

Information

1. Precautions 1.1 Safety Warning 1-1 1.2 Caution for safety 1-2 1.2.1 Toxic material 1-2 1.2.2 Electric Shock and Fire Safety Precautions 1-2 1.2.3 Handling Precautions 1-3 1.2.4 Assembly / Disassembly Precautions 1-3 1.2.5 Disregarding this warning may cause bodily injury 1-4 1.3 ESD Precautions 1-5 2. Product Specifications 2.1 Product Overview 2-1 2.2 Specifications 2-1 2.2.1 General Specifications 2-1 2.2.2 Controller & S/W 2-2 2.2.3 Paper Handling 2-3 2.2.4 Consumables 2-4 2.2.5 Reliability & Service 2-4 2.2.6 Environment 2-4 2.2.7 Options 2-5 2.2.8 Others 2-5 2.3 Model Comparison Table 2-6 3. Summary of Product 3.1 Printer Components 3-1 3.1.1 Front View 3-1 3.1.2 Rear View 3-2 3.1.3 Control Panel 3-3 3.2 System Layout 3-7 3.2.1 Feeding 3-8 3.2.2 Transfer 3-9 3.2.3 Driver Ass'y 3-9 3.2.4 Fuser 3-9 3.2.5 LSU (Laser Scanner Unit) 3-9 3.2.6 Print Cartridge 3-10 3.3 Engine H/W Specifications 3-11 3.3.1 ML-4550 (PCL) Main Board 3-11 3.3.2 SMPS & HVPS board 3-16 3.3.3 Engine F/W 3-20 4. Alignment and Adjustments 4.1 How to use EDC (Engine Diagnostic Control) Mode 4-1 4.1.1 EDC Setup 4-1 4.1.2 Entrance method for EDC 4-1 4.1.3 Cover Status 4-2 4.1.4 Sensor Status 4-3 4.1.5 Motor Test 4-5 4.1.6 Fan Test 4-5 4.1.7 Clutch / Sol 4-6 4.1.8 Fuser Ctrl 4-7 4.1.9 LSU 4-7 4.1.10 Deve Control 4-8 4.1.11 Print Test and Option version 4-9 4.2 Paper Path 4-10 4.2.1 Clearing Paper Jams 4-12 4.3 Sample Pattern 4-17 4.3.1 Information Pages 4-17 4.3.2 Demo Pages 4-17 4.4 Periodic Defective Image 4-18 4.5 Error Messages 4-19 5. Disassembly and Reassembly 5.1 General Precautions on Disassembly 5-1 5.2 Transfer Roller 5-2 5.3 MPF Ass’y 5-3 5.4 Holder Pad Ass'y 5-4 5.5 Retard Ass'y 5-5 5.6 Feed2 Idle Unit 5-6 5.7 Cover Right 5-7 5.8 Main PBA 5-8 5.9 Main Drive Ass'y 5-9 5.10 DEVE Drive Ass'y 5-10 5.11 Connector PBA 5-11 5.12 Solenoid 5-12 5.13 Rear Cover 5-13 5.14 Cover Left 5-14 5.15 Top Cover 5-15 5.16 Open Cover 5-16 5.17 Inner Cover 5-17 5.18 Fuser Ass'y 5-18 5.19 Duplex Solenoid Ass'y 5-20 5.20 Exit Roller 5-21 5.21 LSU 5-22 5.22 DC Fan 5-23 5.23 Toner Sensor PBA 5-24 5.24 REGI Ass'y 5-25 5.25 MP Pick Up Ass'y 5-26 5.26 Pick Up & Feed2 Assy 5-28 5.27 Engine Shield 5-31 6. Troubleshooting 6.1 The cause and solution of Bad image 6-1 6.2 The cause and solution of the bad discharge 6-8 6.3 The cause and solution of the malfunction 6-13 6.4 Maintaining the toner cartridge 6-17 6.5 The cause and solutions of bad environment of the software 6-22 7. Exploded Views & Parts List 7.1 Main Assembly 7-2 7.2 Cover Assembly 7-5 7.3 Frame Assembly 7-7 7.4 Fuser Unit 7-12 7.5 REGI Assembly 7-14 7.6 Main Motor Assembly 7-16 7.7 Deve Motor Assembly 7-18 7.8 Exit Sorenoid Assembly 7-20 7.9 Cassette Assembly 7-22 7.10 Duplex Unit 7-24 7.11 SCF Unit 7-26 8. Block diagram 8.1 System Block Diagram 8-1 9. Connection Diagram 9.1 Connection Diagram 9-1 10. Schematic Diagram 10.1 Main Board 10-1 10.2 DIMM board 10-17 10.3 CRUM board 10-19 10.4 EMPTY board 10-20 10.5 HVPS 10-21 10.6 Panel 10-25 10.7 SCF 10-26 10.8 Toner sensor 10-29 10.9 HDD.eps 10-30 11. Reference Information 11.1 Troubleshooting Tools 11-1 11.2 Acronyms and Abbreviations 11-2 11.3 Select a location for the Printer 11-4 11.4 Sample Tests Patterns 11-5

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