HP 5L (C3941A) manual Image Developing, Image Transferring, Image Fusing

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Step 4: Image Developing

At this stage of the process, the latent electrostatic image is present on the drum. The toner particles obtain a negative surface charge by rubbing against the developing cylinder which is connected to a negative dc supply. The negatively charged toner is attracted to the discharged (exposed, grounded) areas of the drum, and repelled from the negatively charged (non-exposed) areas.

Step 5: Image Transferring

During the transferring process, the toner image on the drum surface is transferred to the paper. A positive charge applied to the back of the paper by the transfer roller causes the negatively charged toner on the drum surface to be attracted to the paper. After separation, the drum is cleaned and conditioned for the next image.

Step 6: Image Fusing

During the fusing process, the toner is fused into the paper by heat and pressure to produce a permanent image. The paper passes between a heated fusing element and a soft pressure roller. This melts the toner and presses it into the paper.

5 - 14 Functional Overview

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Contents HP LaserJet 5L C3941A Warranty Conventions Chapter Descriptions Product InformationList of Figures Figure B-1 Vcci Statement Japan List of Tables Viii Contents Product InformationProduct Information Printer Features Printer FeaturesPaper Capacities and Sizes Paper Capacities and SizesHP LaserJet 5L Model and Serial Numbers IdentificationModel and Serial Specifications Performance SpecificationsElectrical Specifications Category SpecificationProduct Overview Front/Side Views of the PrinterFront Door Assemblies Back View of the Printer Service Approach Parts Exchange ProgramOrdering Parts Ordering ConsumablesRelated Documentation DescriptionTechnical Assistance HP CompuServe ForumNorth American Response Center Customer Information Centers North America OnlyCustomer Support Center Assist Line Warranty Warranty ExclusionsWarranty Limitations Voltage ConversionsSite Requirements Site Requirements Site Requirements Operating EnvironmentEnvironmental Requirements Operating StoragePrinter Space Requirements Printer Space Requirements Printer DimensionsDescription Dimension Storing Opened Toner Cartridges HP C3906A Toner CartridgeStorage Conditions Toner Cartridge Handling Suggestions Toner Cartridge DistributionInstallation and Configuration Installation and Configuration Unpacking and Installation Check package contentsChoose the best location Unpack the printerInstall the toner cartridge Attach the power cordInstall printing software Load paperHost-Based Printer Driver Minimum System RequirementsHost-Based Printer Settings Host-Based Printer Settings OptionsPCL Printer Driver Host-Based Printing StatusPCL Printer Settings PCL Printer Settings OptionsUsing Host-Based and PCL Drivers Together PCL Printing StatusUsing the Control Panel Control Panel LayoutIndicator Lights 1 When this IndicatorLED Lights It means this Do thisIndicator Lights 2 Hardware Error There is anFunction Action Lights Result Front Panel ButtonFront Panel Button Usage Printing a Self-Test Self-testContinuous Self Test Printing an Engine Test Engine Test ButtonResetting the Printer To Reset the PrinterInstallation and Configuration Printer Maintenance Printer Maintenance Description Est Life Remarks Pgs Life Expectancy of ConsumablesLife Expectancy of Consumables Five Percent Text Coverage Toner Cartridge LifeSaving Toner with EconoMode Refilled Toner Cartridges Recycling Toner CartridgesCleaning the Printer Cleaning Printer Components Cleaning Printer ComponentsCleaning Spilled Toner Functional Overview Functional Overview Printer Functional Block Diagram Basic Printer FunctionsDC Controller/Power System DC Controller LoadsPrint Engine Control System Laser and Scanner DrivePower System on DC Controller PCA AC Power DistributionHigh Voltage Power Distribution Random Access Memory RAM Formatter SystemRead Only Memory ROM Parallel InterfaceResolution Enhancement REt Control PanelMemory Enhancement technology MEt EconoMode vs Normal ModeEconoMode PJL Overview Enhanced I/OProtect Image Formation Block Diagram Image Formation SystemDrum Cleaning Toner CartridgeDrum Conditioning Image WritingImage Transferring Image FusingImage Developing Paper Feed System Simplified Paper Path Solenoid and Sensors Solenoid and Photosensors Name DescriptionPaper Jam Detection Refer to Timing Diagram on the next Basic Sequence of OperationPrinter Timing Period Timing PurposeGeneral Timing Diagram Removal and Replacement Removal and Replacement Removal and Replacement Strategy Required Tools Phillips and Posidriv screwdriversInstalling Memory Cards Dram Back Cover Removal 1 Covers and DoorsBack Cover Back Cover Removal 2 EP Door Assembly EP Door Assembly RemovalMemory Door Memory Door RemovalMain Cover and Paper Input Assembly Main Cover and Paper Input Assembly RemovalInternal Assemblies Control Panel RemovalExit Roller Assembly Exit Roller RemovalDelivery Assembly Delivery Assembly Removal 1Delivery Assembly Removal 2 Fuser Pressure Plate Fuser Pressure Plate RemovalFuser Pressure Plate Replacement Heating Element Heating Element Removal 1Heating Element Removal 2 Heating Element Removal 3 Pressure Roller Pressure Roller RemovalFace-Up/Face-Down Lever Replacement Face-Up/Face-Down LeverFuser Exit Roller Assembly Fuser Exit Roller RemovalPaper Exit Sensor Flag Replacement Paper Exit Sensor FlagTop Assemblies Laser/Scanner AssemblyLaser/Scanner Assembly Removal Solenoid Solenoid Removal 1Solenoid Removal 2 Pickup Roller Assembly Pickup Roller Assembly Removal 1Pickup Roller Assembly Removal 2 To reinstall Paper Pickup Roller Assembly Replacement Inside/Front ViewPaper Feed Frame Paper Feed Frame RemovalPaper Feed Frame Removal 1 Paper Feed Frame Removal 2 Transfer Roller Guide & Transfer Roller Kick Plate Kick Plate RemovalKick Plate Spring Replacement Separation Pad Separation Pad RemovalSubpads Subpad RemovalFeed Assembly Feed Assembly Removal 1Feed Assembly Removal 2 Feed Assembly Removal 3 Memory Door Guide Removal Bottom AssembliesMemory Door Guide Motor Motor RemovalDC Controller DC Controller Removal 1DC Controller Removal 2 DC Controller Removal 3 Formatter PCA Formatter Board RemovalTroubleshooting Troubleshooting General Troubleshooting Flowchart StartExit Paper Path and Components Paper Path and ComponentsDC Controller Diagram DC Controller PCA ComponentsPrinter Error Troubleshooting Priority of ErrorsLEDs Description Recommended Action Printer Status MessagesPrinter Status Messages 1 Unclearable Error Printer Status Messages 2Service and Error Messages Service and Error Messages 1Beam Error. There are a number of causes Service and Error Messages 3 Formatter ErrorImage Formation Troubleshooting Check the Toner CartridgeImage Defect Examples Faded PrintVertical Lines Character Voids Dropouts Blank Page Occasional White Horizontal Line Distorted Image or BD Failure Engine Test Troubleshooting ChecksEngine Test Half-Self Test Functional Check Drum Rotation Functional Check High-Voltage Power Supply Check High-Voltage Power Supply CheckToner Cartridge High Voltage Connection Points 1 Checks ActionToner Cartridge High Voltage Connection Points 2 Possible Cause Recommended Action Paper Curl TroubleshootingPaper Curl Overriding PS204 Troubleshooting ToolsPaper Path Check Repetitive Image Defect Ruler Repetitive Image Defect RulerMain Wiring Diagram TroubleshootingConnector Signal Name Remarks Cable PinoutsDosns Troubleshooting Parts and Diagrams Parts and Diagrams How to Use the Part Lists and Diagrams Parts and cannot be ordered through SMO Product Number Description Accessories and SuppliesAccessories and Supplies Common Hardware Example DescriptionMajor Assembly Locations Covers and Doors Description Internal Components 1 Qty Description Internal Components 2 Parts and Diagrams Internal Components 3 Parts and Diagrams DC Controller/Formatter and Cables Inches Connector Cable LengthECU Case Pickup Roller Assembly Parts and Diagrams Feed Assembly RG5-1942-000CN Feed Assembly RB1-7226-000CN Idler Roller Separation Guide Assembly Parts and Diagrams Delivery Assembly Parts and Diagrams Parts and Diagrams Parts Index Alphabetical Parts List Parts IndexParts Index A-3 Parts Index Parts Index A-5 Table A-2 Numerical Parts Index Numerical Parts List Table A-2Parts Index Parts Index A-9 Parts Index Laser Safety U.S.A Regulatory InformationLaser Statement Finland Toner Safety Ozone EmissionVcci Statement Japan FCC Statement Class BVcci Statement Japan Index HP AUDIO-TIPSIndex-2 Index-3 Index-4