HP 5L (C3941A) manual Enhanced I/O, Protect, PJL Overview

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Enhanced I/O

The Enhanced I/O feature allows printer memory to be used for storing data received from the host computer. When Enhanced I/O is enabled, you can send more data to your printer in shorter amounts of time, which allows you to return to your application sooner. Enhanced I/O has the following options:

∙Auto—allows the printer to use Enhanced I/O memory allocation to increase the speed of data transfer from the host computer to the printer, if necessary.

∙Off—uses the minimum amount of printer memory for storing data sent from the host computer.

Enhanced I/O is only available in PCL mode. When using the host-based driver, your PC handles memory management.

Page Protect

Page complexity (rules, complex graphics, or dense text) may exceed the printer’s ability to create the page image fast enough to keep pace with the Image Formation process. If Page Protect is disabled and a page is too complex, the page may print in parts (for example, the top half on one page and the bottom half on the next page). Some print data loss is likely in these instances, and the printer will display an error message.

Page Protect allows the Formatter to create the entire page image in page buffer memory before physically moving the paper through the printer. This process ensures that the entire page will be printed. Page Protect applies only to PCL printing. The default setting is Auto.

PJL Overview

Printer Job Language (PJL) is an integral part of configuration, in addition to the standard Printer Command Language (PCL). With standard Centronics cabling, PJL allows the printer to perform functions such as:

∙Two-way communication with the host computer through a Bi-directional Parallel connection. The printer can tell the host such things as the control panel status.

∙Isolation of print environment settings from one print job to the next. For example, if a print job is sent to the printer in landscape mode, the subsequent print jobs print in landscape only if they are formatted for landscape printing.

Functional Overview 5 - 11

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Contents HP LaserJet 5L C3941A Warranty Conventions Product Information Chapter DescriptionsList of Figures Figure B-1 Vcci Statement Japan List of Tables Viii Product Information ContentsProduct Information Printer Features Printer FeaturesPaper Capacities and Sizes Paper Capacities and SizesHP LaserJet 5L Model and Serial Numbers IdentificationModel and Serial Performance Specifications SpecificationsElectrical Specifications Category SpecificationFront/Side Views of the Printer Product OverviewFront Door Assemblies Back View of the Printer Parts Exchange Program Service ApproachOrdering Parts Ordering ConsumablesDescription Related DocumentationHP CompuServe Forum Technical AssistanceNorth American Response Center Customer Information Centers North America OnlyCustomer Support Center Assist Line Warranty Exclusions WarrantyVoltage Conversions Warranty LimitationsSite Requirements Site Requirements Operating Environment Site RequirementsEnvironmental Requirements Operating StoragePrinter Space Requirements Printer Space Requirements Printer DimensionsDescription Dimension Storing Opened Toner Cartridges HP C3906A Toner CartridgeStorage Conditions Toner Cartridge Distribution Toner Cartridge Handling SuggestionsInstallation and Configuration Installation and Configuration Check package contents Unpacking and InstallationChoose the best location Unpack the printerAttach the power cord Install the toner cartridgeInstall printing software Load paperMinimum System Requirements Host-Based Printer DriverHost-Based Printer Settings Options Host-Based Printer SettingsHost-Based Printing Status PCL Printer DriverPCL Printer Settings Options PCL Printer SettingsPCL Printing Status Using Host-Based and PCL Drivers TogetherControl Panel Layout Using the Control PanelWhen this Indicator Indicator Lights 1LED Lights It means this Do thisHardware Error There is an Indicator Lights 2Function Action Lights Result Front Panel ButtonFront Panel Button Usage Self-test Printing a Self-TestContinuous Self Test Engine Test Button Printing an Engine TestTo Reset the Printer Resetting 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 Recycling Toner Cartridges Refilled Toner CartridgesCleaning the Printer Cleaning Printer Components Cleaning Printer ComponentsCleaning Spilled Toner Functional Overview Functional Overview Basic Printer Functions Printer Functional Block DiagramDC Controller Loads DC Controller/Power SystemLaser and Scanner Drive Print Engine Control SystemAC Power Distribution Power System on DC Controller PCAHigh Voltage Power Distribution Formatter System Random Access Memory RAMRead Only Memory ROM Parallel InterfaceControl Panel Resolution Enhancement REtMemory Enhancement technology MEt EconoMode vs Normal ModeEconoMode PJL Overview Enhanced I/OProtect Image Formation System Image Formation Block DiagramToner Cartridge Drum CleaningDrum Conditioning Image WritingImage Transferring Image FusingImage Developing Paper Feed System Simplified Paper Path Name Description Solenoid and Sensors Solenoid and PhotosensorsPaper Jam Detection Basic Sequence of Operation Refer to Timing Diagram on the nextPrinter Timing Period Timing PurposeGeneral Timing Diagram Removal and Replacement Removal and Replacement Removal and Replacement Strategy Phillips and Posidriv screwdrivers Required ToolsInstalling Memory Cards Dram Back Cover Removal 1 Covers and DoorsBack Cover Back Cover Removal 2 EP Door Assembly Removal EP Door AssemblyMemory Door Removal Memory DoorMain Cover and Paper Input Assembly Removal Main Cover and Paper Input AssemblyControl Panel Removal Internal AssembliesExit Roller Removal Exit Roller AssemblyDelivery Assembly Removal 1 Delivery AssemblyDelivery Assembly Removal 2 Fuser Pressure Plate Removal Fuser Pressure PlateFuser Pressure Plate Replacement Heating Element Removal 1 Heating ElementHeating Element Removal 2 Heating Element Removal 3 Pressure Roller Removal Pressure RollerFace-Up/Face-Down Lever Face-Up/Face-Down Lever ReplacementFuser Exit Roller Removal Fuser Exit Roller AssemblyPaper Exit Sensor Flag Paper Exit Sensor Flag ReplacementTop Assemblies Laser/Scanner AssemblyLaser/Scanner Assembly Removal Solenoid Removal 1 SolenoidSolenoid Removal 2 Pickup Roller Assembly Removal 1 Pickup Roller AssemblyPickup Roller Assembly Removal 2 Paper Pickup Roller Assembly Replacement Inside/Front View To reinstallPaper Feed Frame Removal Paper Feed FramePaper Feed Frame Removal 1 Paper Feed Frame Removal 2 Transfer Roller Guide & Transfer Roller Kick Plate Removal Kick PlateKick Plate Spring Replacement Separation Pad Removal Separation PadSubpad Removal SubpadsFeed Assembly Removal 1 Feed AssemblyFeed Assembly Removal 2 Feed Assembly Removal 3 Memory Door Guide Removal Bottom AssembliesMemory Door Guide Motor Removal MotorDC Controller Removal 1 DC ControllerDC Controller Removal 2 DC Controller Removal 3 Formatter Board Removal Formatter PCATroubleshooting Troubleshooting Start General Troubleshooting FlowchartExit Paper Path and Components Paper Path and ComponentsDC Controller PCA Components DC Controller DiagramPriority of Errors Printer Error TroubleshootingLEDs Description Recommended Action Printer Status MessagesPrinter Status Messages 1 Printer Status Messages 2 Unclearable ErrorService and Error Messages 1 Service and Error MessagesBeam Error. There are a number of causes Formatter Error Service and Error Messages 3Check the Toner Cartridge Image Formation TroubleshootingFaded Print Image Defect ExamplesVertical 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 RulerTroubleshooting Main Wiring DiagramCable Pinouts Connector Signal Name RemarksDosns 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 Example Description Common HardwareMajor 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 Parts Index Alphabetical Parts ListParts Index A-3 Parts Index Parts Index A-5 Table A-2 Numerical Parts Index Table A-2 Numerical Parts ListParts Index Parts Index A-9 Parts Index Regulatory Information Laser Safety U.S.ALaser Statement Finland Ozone Emission Toner SafetyVcci Statement Japan FCC Statement Class BVcci Statement Japan HP AUDIO-TIPS IndexIndex-2 Index-3 Index-4