HP 5L (C3941A) manual Image Formation System, Image Formation Block Diagram

Page 66

Image Formation System

Laser printing requires the interaction of several different technologies (such as electronics, optics, and electrophotographics) to provide a printed page. Each process functions independently and must be coordinated with the other printer processes. Image formation consists of six processes:

∙Step 1. Drum Cleaning

∙Step 2. Drum Conditioning

∙Step 3. Image Writing

∙Step 4. Image Developing

∙Step 5. Image Transferring

∙Step 6. Image Fusing

Figure 5-4

Electrostatic Latent Image Formation Block

 

 

 

Flow Of Paper

 

 

2. Scanning Exposure

 

Direction Of Drum Rotation

 

 

 

 

1. Primary Charging

 

 

Purpose-Multi Tray

Block

 

 

Developing

 

3. Developing

ManualFeedingSlot

 

 

 

Block

 

Drum Cleaning

7. Drum Cleaning

 

 

 

 

 

 

 

Paper Delivery

Fuser Block

 

 

 

 

 

 

 

 

5. Separation 4. Transfer

Registration

 

 

6. Fusing

 

 

 

Transfer Block

Image Formation Block Diagram

5 - 12 Functional Overview

Page 65 Page 67
Image 66
Page 65 Page 67
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 Paper Capacities and Sizes Printer FeaturesPrinter Features Paper Capacities and SizesIdentification Model and SerialHP LaserJet 5L Model and Serial Numbers Electrical Specifications SpecificationsPerformance Specifications Category SpecificationProduct Overview Front/Side Views of the PrinterFront Door Assemblies Back View of the Printer Ordering Parts Service ApproachParts Exchange Program Ordering ConsumablesRelated Documentation DescriptionTechnical Assistance HP CompuServe ForumCustomer Information Centers North America Only Customer Support Center Assist LineNorth American Response Center Warranty Warranty ExclusionsWarranty Limitations Voltage ConversionsSite Requirements Site Requirements Environmental Requirements Site RequirementsOperating Environment Operating StoragePrinter Space Requirements Printer Dimensions Description DimensionPrinter Space Requirements HP C3906A Toner Cartridge Storage ConditionsStoring Opened Toner Cartridges Toner Cartridge Handling Suggestions Toner Cartridge DistributionInstallation and Configuration Installation and Configuration Choose the best location Unpacking and InstallationCheck package contents Unpack the printerInstall printing software Install the toner cartridgeAttach the power cord 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 LayoutLED Lights Indicator Lights 1When this Indicator It means this Do thisIndicator Lights 2 Hardware Error There is anFront Panel Button Front Panel Button UsageFunction Action Lights Result 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 Life Expectancy of Consumables Life Expectancy of ConsumablesDescription Est Life Remarks Pgs Toner Cartridge Life Saving Toner with EconoModeFive Percent Text Coverage 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 Read Only Memory ROM Random Access Memory RAMFormatter System Parallel InterfaceResolution Enhancement REt Control PanelEconoMode vs Normal Mode EconoModeMemory Enhancement technology MEt Enhanced I/O ProtectPJL Overview Image Formation Block Diagram Image Formation SystemDrum Conditioning Drum CleaningToner Cartridge Image WritingImage Fusing Image DevelopingImage Transferring Paper Feed System Simplified Paper Path Solenoid and Sensors Solenoid and Photosensors Name DescriptionPaper Jam Detection Printer Timing Refer to Timing Diagram on the nextBasic Sequence of Operation Period Timing PurposeGeneral Timing Diagram Removal and Replacement Removal and Replacement Removal and Replacement Strategy Required Tools Phillips and Posidriv screwdriversInstalling Memory Cards Dram Covers and Doors Back CoverBack Cover Removal 1 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 FlagLaser/Scanner Assembly Laser/Scanner Assembly RemovalTop Assemblies 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 Bottom Assemblies Memory Door GuideMemory Door Guide Removal 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 ErrorsPrinter Status Messages Printer Status Messages 1LEDs Description Recommended Action 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 Troubleshooting Checks Engine TestEngine Test Half-Self Test Functional Check Drum Rotation Functional Check Toner Cartridge High Voltage Connection Points 1 High-Voltage Power Supply CheckHigh-Voltage Power Supply Check Checks ActionToner Cartridge High Voltage Connection Points 2 Paper Curl Troubleshooting Paper CurlPossible Cause Recommended Action Troubleshooting Tools Paper Path CheckOverriding PS204 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 Accessories and Supplies Accessories and SuppliesProduct Number Description 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 Connector Cable Length ECU CaseInches 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 EmissionFCC Statement Class B Vcci Statement JapanVcci Statement Japan Index HP AUDIO-TIPSIndex-2 Index-3 Index-4
Top Page Image Contents