LSU Laser Scanner Unit | Samsung ML-2015/XEV guide

System Overview

3.1.5 LSU (Laser Scanner Unit)

The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of LBP.

The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the /HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for scanning..

Photo Diode

LD Driver circit

LD(Laser Diode) Protector panel

OPC Drum

Polygon Mirror

Polygon Motor

Motor Driver

	Service Manual	3-5
Samsung Electronics		3-5
Samsung Electronics

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Samsung ML-2015/XEV manual LSU Laser Scanner Unit

Contents

Laser Printer Version no .00 Code JC-0141I Contents Block diagram Disassembly and ReassemblyTroubleshooting Exploded Views & Parts List Circuit Description Reference Information Safety Warning Precautions Noxious Material Precaution Safety CautionElectric Shock or fire Precaution Assembly/Disassembly precaution Handling Precautions ESD Precautions General Specifications SpecificationsProduct Overview Controller Product Specifications Descriptions Environmental Range Electrical SpecificationToner Cartridge Input Paper Size Paper Handling Specifications ML-1610 Series ML-2010 Series Remark Model Comparison Table System Outline System Overview Hvps Smps Fuser FeedingTransfer Ass’y Driver Ass’y System Overview LSU Laser Scanner Unit Cleaning Blade 1 H/W Overview H/W Structure and Descriptions Flash Memory 12.0MHz Main Board Sdram AsicSPGPm Specification Serial port interface Uart TimerInterrupt Controller Intc USB interface Jupiter4E Internal Block Diagram Paper Feeding/Width Sensor Controller Pin Signal Smps board Switching Module Power Supply CH1 CH2 Smps Specification Developing Voltage DEV Hvps board High Voltage Power SupplyTransfer High Voltage THV+ Charge Voltage MHV Supply Fuser AC Power Control Introduction S/W Structure and DescriptionsEngine Control F/W Overview Fan Unit Motors Solenold Clutch Engine Interface Module Design 3 F/W Architecture of Engine Control FirmwareEngine Sensing & Unit Control Module Design Start LED Behaviors Error LED Operation Accessory List Initial Product InstallationInstalling the Toner Cartridge System Overview Samsung Electronics You can load approximately 150 sheets of paper in the tray Loading Paper Connecting a Printer Cable Printing a Demo Turning the Printer on System Requirements Installing Printer SoftwareIf you are printing from Windows If you are printing in Linux Sample Pattern Alignment and Adjustments Control Panel OP Panel On Line/Error and Toner Save LEDs Cancel button LED Status Error Message Consumables and Replacement Parts Roller Defective image Typical defect Periodic Defective Image DCU Setup How to use DCU Normal Code Code Self Diagnostic Mode 13 THV+ TRIGGER. ALL HV Functi on Enter Up/ Down Stop Remar k Self Test Button Paper Path Paper Exit Area Clearing Paper Jams Samsung Electronics Around the Toner Cartridge Paper Feed Area Samsung Electronics Print Quality Checklist Solving Print Quality ProblemsTips for Avoiding Paper Jams Disassembly and Reassembly Front Cover Disassembly and Reassembly MP Tray Smps Cover Cassette Tray Main Cover Top Cover Hvps RX Drive Thermister Thermo Cap For removing only SMPS, perform the follows in order Engine Shield Including Main PBA and Smps 11 LSU Paper Path Frame PickUp Roller Checking Symptoms Troubleshooting Basic Check List Check paper type Check Power partCheck the Installation Environment Initial Inspection 2 JAM Check and Cause SolutionBad discharge Wrong Print Position 4 JAM 3 JAM Multi-Feeding Paper rolled in the Toner Cartridge OPC Drum All LEDs blinking Scan Error All LEDs blinking Fuser ErrorMalfunction Paper Empty Not function of the gear of the fuser due to melting awayPaper Empty without indication Cover Open No lamp on when the cover is open Defective motor operation No Power Vertical Line Getting Curved Printer is not working Bad Software Environment Utilities program Abnormal Printing How to delete the data in the spool manager Spool Error Vertical Black Line and Band Bad imageVertical White Line Black/White Spot Horizontal Black Band Dark Image or a Black Light Image Background Uneven Density Ghost Description Digital Printer Stains on the Face Blank Page Print out Stains on Back Exploded Views and Parts List ML-2010/XEV Main Assembly Assembly Fuser Unit Paper Path Unit MP Tray Assembly Basic Parts List ML-2010/XEV Paper Path Assembly MP Tray Assembly FELT-FRAME Noise LML-2010,POLYESTER RAY SNA IC ASIC-JUPITER4ES4FD004X,ML-1520,160P MEC-BUSHING AGI LSF-5100,SEC,POM+SANTOP SNA JUPITER4e +5V ML-201520ppm GDI P1284 H/W Block Diagram+24V Diagram Schematic Diagrams Main Board2/5 Main Board3/5 Main Board4/5 Main Board5/5 Connector Circuit Diagram Smps Circuit Diagram Hvps Circuit Diagram1/3 Hvps Circuit Diagram2/3 Hvps Circuit Diagram3/3 Troubleshooting Tool Abbreviations Explanation Acronyms and Abbreviations1 SPL Acronyms and Abbreviations2 Selecting printer locations A4 ISO 19752 Standard Patterns Sample Tests Patterns Heater Control 12.1 Engine Controller Circuit Description PWM Controller LSU Controller Motor Driver APB Bridge PVC Lsuc Name Direction Description ADC Controller