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Samsung ML-4551ND User Manual

Samsung ML-4551ND
185 pages
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DIGITAL LASER PRINT CONTENTS
[The keynote of Product]
- 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
Manual
SERVICE
DIGITAL LASER PRINT
ML-4550 Series
ML-4550 / ML-4551N / ML-4551ND
Basic Model
:
ML-4550
ML-4551NR / ML-4551NDR

Table of Contents

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Samsung ML-4551ND Specifications

General IconGeneral
Printer TypeLaser
Print Resolution1200 x 1200 dpi
Monthly Duty Cycle150, 000 pages
Resolution (Black)1200 x 1200 dpi
First Page Out Time (Black)8.5 seconds
First Print Out Time8.5 seconds
Memory (Maximum)512 MB
Duty Cycle (Monthly)150, 000 pages
USB ConnectivityUSB 2.0
Operating Systems SupportedWindows, Mac OS, Linux
Print Speed (Mono)45 ppm
ConnectivityUSB, Ethernet
Print Speed (Black)45 ppm
Network ConnectivityEthernet 10/100 Base TX
Supported Media TypesLabels, Envelopes
Supported Media SizesLetter, Legal, Executive, Folio, Oficio, A4, A5, A6
Duplex PrintingAutomatic

Summary

Precautions

Safety Warning

General safety guidelines for printer service engineers, including high voltages and lasers.

Caution for safety

Safety warnings regarding toxic materials, electric shock, and fire hazards.

ESD Precautions

Guidelines for handling components sensitive to electrostatic discharge.

Product Specifications

Product Overview

General introduction to the printer's features and models.

Specifications

Detailed technical specifications of the printer.

Model Comparison Table

Comparison of the printer's specifications against competitors.

Summary of Product

Printer Components

Identification of the printer's physical components.

System Layout

Overview of the printer's internal system architecture.

Engine H/W Specifications

Hardware specifications of the printer's engine.

Alignment and Adjustments

How to use EDC Mode

Guide for using the engine diagnostic control mode for testing.

Paper Path

Explanation of the paper's path through the printer.

Sample Pattern

Information on printing sample patterns for maintenance.

Periodic Defective Image

Troubleshooting guide for recurring image defects.

Error Messages

List and explanation of printer error messages.

Disassembly and Reassembly

General Precautions on Disassembly

Safety and handling precautions before disassembly.

Transfer Roller

Procedure for replacing the transfer roller.

MPF Ass’y

Procedure for disassembling the Multi-Purpose Feeder (MPF) assembly.

Holder Pad Ass'y

Procedure for disassembling the holder pad assembly.

Roller Idle ASS'Y

Procedure for disassembling the roller idle assembly.

Feed2 Idle Unit

Procedure for disassembling the Feed2 idle unit.

Cover Right

Procedure for removing the right side cover.

Main PBA

Procedure for removing the main Printed Board Assembly (PBA).

Main Drive Ass'y

Procedure for removing the main drive assembly.

DEVE Drive Ass'y

Procedure for removing the deve drive assembly.

Connector PBA

Procedure for removing the connector PBA.

Solenoid

Procedure for removing solenoids.

Rear Cover

Procedure for removing the rear cover.

Cover Left

Procedure for removing the left side cover.

Top Cover

Procedure for removing the top cover.

Open Cover

Procedure for removing the open cover.

Inner Cover

Procedure for removing the inner cover.

Fuser Ass'y

Procedure for removing the fuser assembly.

Duplex Solenoid Ass'y

Procedure for removing the duplex solenoid assembly.

Exit Roller

Procedure for removing the exit roller.

LSU

Procedure for removing the Laser Scanner Unit (LSU).

DC Fan

Procedure for removing the DC fan.

Toner Sensor PBA

Procedure for removing the toner sensor PBA.

REGI Ass'y

Procedure for removing the registration assembly.

MP Pick Up Ass'y

Procedure for removing the MP pick-up assembly.

Pick Up & Feed2 Ass'y

Procedure for removing the pick-up and feed2 assembly.

Engine Shield

Procedure for removing the engine shield.

Troubleshooting

Procedure of Checking the Symptoms

Step-by-step guide to diagnose printer problems.

Bad Image Causes and Solutions

Troubleshooting common image quality issues.

Discharge Causes and Solutions

Troubleshooting print position and paper jam issues.

Software Environment Causes and Solutions

Troubleshooting software and environment issues affecting printer operation.

Toner Cartridge Maintenance

Guide to toner cartridge care, life, and replacement.

Software Environment Issues

Troubleshooting printer unresponsiveness due to environment setup.

Exploded Views and Parts List

Main Assembly

Exploded view and parts list for the main printer assembly.

Cover Assembly

Exploded view and parts list for printer covers.

Frame Assembly

Exploded view and parts list for the printer frame.

Fuser Unit

Exploded view and parts list for the fuser unit.

REGI Assembly

Exploded view and parts list for the registration assembly.

Main Motor Assembly

Exploded view and parts list for the main motor.

Deve Motor Assembly

Exploded view and parts list for the deve motor.

Exit Solenoid Assembly

Exploded view and parts list for the exit solenoid.

Cassette Assembly

Exploded view and parts list for the cassette assembly.

Duplex Unit

Exploded view and parts list for the duplex unit.

SCF Unit

Exploded view and parts list for the SCF unit.

Block Diagram

System Block Diagram

Overall system block diagram of the printer.

Connection Diagram

Connection Diagram

Detailed connection diagram of printer components.

Reference Information

Tool for Troubleshooting

List of recommended tools for troubleshooting.

Acronyms and Abbreviations

List of acronyms and abbreviations used in the manual.

Select a location for the printer

Guidelines for selecting an appropriate printer installation location.

Sample Tests Patterns

Explanation of standard test patterns used for factory testing.

LAN (Optional Function)

Information on the wired LAN option and LED status.

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