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HP 5L (C3941A) manual Control Panel, Resolution Enhancement REt

Models: 5L (C3941A)

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Control Panel

Status LED Lights

The Formatter uses three LEDs mounted under the printer cover to communicate printer status to the user. Refer to “Using the Control Panel” in Chapter 3 and “Printer Error Troubleshooting” in Chapter 7 for more information on the lights.

Front Panel Button

The Formatter PCA is connected to a microswitch located on the control panel PCA. The single button is used for such functions as self test, reset, and to display error codes. Refer to “Using the Control Panel” in Chapter 3 for more information on the Front Panel Button.

Resolution Enhancement (REt)

The Formatter PCA contains circuitry for Resolution Enhancement technology (REt), which modifies the standard video dot data on its way to the DC Controller to produce “smoothed” black-to-white boundaries. REt is user-adjustable from some software applications. Available settings are On or Off.

Functional Overview 5 - 9

Image 63

HP 5L (C3941A) manual Control Panel, Resolution Enhancement REt

Contents

HP LaserJet 5L C3941A Warranty Conventions Product Information Chapter Descriptions List of Figures Figure B-1 Vcci Statement Japan List of Tables Viii Product Information Contents Product Information Paper Capacities and Sizes Printer FeaturesPrinter Features Paper Capacities and Sizes Identification Model and SerialHP LaserJet 5L Model and Serial Numbers Category Specification SpecificationsPerformance Specifications Electrical Specifications Front/Side Views of the Printer Product Overview Front Door Assemblies Back View of the Printer Ordering Consumables Service ApproachParts Exchange Program Ordering Parts Description Related Documentation HP CompuServe Forum Technical Assistance Customer Information Centers North America Only Customer Support Center Assist LineNorth American Response Center Warranty Exclusions Warranty Voltage Conversions Warranty Limitations Site Requirements Site Requirements Operating Storage Site RequirementsOperating Environment Environmental Requirements Printer Space Requirements Printer Dimensions Description DimensionPrinter Space Requirements HP C3906A Toner Cartridge Storage ConditionsStoring Opened Toner Cartridges Toner Cartridge Distribution Toner Cartridge Handling Suggestions Installation and Configuration Installation and Configuration Unpack the printer Unpacking and InstallationCheck package contents Choose the best location Load paper Install the toner cartridgeAttach the power cord Install printing software Minimum System Requirements Host-Based Printer Driver Host-Based Printer Settings Options Host-Based Printer Settings Host-Based Printing Status PCL Printer Driver PCL Printer Settings Options PCL Printer Settings PCL Printing Status Using Host-Based and PCL Drivers Together Control Panel Layout Using the Control Panel It means this Do this Indicator Lights 1When this Indicator LED Lights Hardware Error There is an Indicator Lights 2 Front Panel Button Front Panel Button UsageFunction Action Lights Result Self-test Printing a Self-Test Continuous Self Test Engine Test Button Printing an Engine Test To Reset the Printer Resetting the Printer Installation 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 Recycling Toner Cartridges Refilled Toner Cartridges Cleaning the Printer Cleaning Printer Components Cleaning Printer Components Cleaning Spilled Toner Functional Overview Functional Overview Basic Printer Functions Printer Functional Block Diagram DC Controller Loads DC Controller/Power System Laser and Scanner Drive Print Engine Control System AC Power Distribution Power System on DC Controller PCA High Voltage Power Distribution Parallel Interface Random Access Memory RAMFormatter System Read Only Memory ROM Control Panel Resolution Enhancement REt EconoMode vs Normal Mode EconoModeMemory Enhancement technology MEt Enhanced I/O ProtectPJL Overview Image Formation System Image Formation Block Diagram Image Writing Drum CleaningToner Cartridge Drum Conditioning Image Fusing Image DevelopingImage Transferring Paper Feed System Simplified Paper Path Name Description Solenoid and Sensors Solenoid and Photosensors Paper Jam Detection Period Timing Purpose Refer to Timing Diagram on the nextBasic Sequence of Operation Printer Timing General Timing Diagram Removal and Replacement Removal and Replacement Removal and Replacement Strategy Phillips and Posidriv screwdrivers Required Tools Installing Memory Cards Dram Covers and Doors Back CoverBack Cover Removal 1 Back Cover Removal 2 EP Door Assembly Removal EP Door Assembly Memory Door Removal Memory Door Main Cover and Paper Input Assembly Removal Main Cover and Paper Input Assembly Control Panel Removal Internal Assemblies Exit Roller Removal Exit Roller Assembly Delivery Assembly Removal 1 Delivery Assembly Delivery Assembly Removal 2 Fuser Pressure Plate Removal Fuser Pressure Plate Fuser Pressure Plate Replacement Heating Element Removal 1 Heating Element Heating Element Removal 2 Heating Element Removal 3 Pressure Roller Removal Pressure Roller Face-Up/Face-Down Lever Face-Up/Face-Down Lever Replacement Fuser Exit Roller Removal Fuser Exit Roller Assembly Paper Exit Sensor Flag Paper Exit Sensor Flag Replacement Laser/Scanner Assembly Laser/Scanner Assembly RemovalTop Assemblies Solenoid Removal 1 Solenoid Solenoid Removal 2 Pickup Roller Assembly Removal 1 Pickup Roller Assembly Pickup Roller Assembly Removal 2 Paper Pickup Roller Assembly Replacement Inside/Front View To reinstall Paper Feed Frame Removal Paper Feed Frame Paper Feed Frame Removal 1 Paper Feed Frame Removal 2 Transfer Roller Guide & Transfer Roller Kick Plate Removal Kick Plate Kick Plate Spring Replacement Separation Pad Removal Separation Pad Subpad Removal Subpads Feed Assembly Removal 1 Feed Assembly Feed Assembly Removal 2 Feed Assembly Removal 3 Bottom Assemblies Memory Door GuideMemory Door Guide Removal Motor Removal Motor DC Controller Removal 1 DC Controller DC Controller Removal 2 DC Controller Removal 3 Formatter Board Removal Formatter PCA Troubleshooting Troubleshooting Start General Troubleshooting Flowchart Exit Paper Path and Components Paper Path and Components DC Controller PCA Components DC Controller Diagram Priority of Errors Printer Error Troubleshooting Printer Status Messages Printer Status Messages 1LEDs Description Recommended Action Printer Status Messages 2 Unclearable Error Service and Error Messages 1 Service and Error Messages Beam Error. There are a number of causes Formatter Error Service and Error Messages 3 Check the Toner Cartridge Image Formation Troubleshooting Faded Print Image Defect Examples Vertical 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 Checks Action High-Voltage Power Supply CheckHigh-Voltage Power Supply Check Toner Cartridge High Voltage Connection Points 1 Toner 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 Ruler Troubleshooting Main Wiring Diagram Cable Pinouts Connector Signal Name Remarks Dosns 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 Example Description Common Hardware Major 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 Parts Index Alphabetical Parts List Parts Index A-3 Parts Index Parts Index A-5 Table A-2 Numerical Parts Index Table A-2 Numerical Parts List Parts Index Parts Index A-9 Parts Index Regulatory Information Laser Safety U.S.A Laser Statement Finland Ozone Emission Toner Safety FCC Statement Class B Vcci Statement JapanVcci Statement Japan HP AUDIO-TIPS Index Index-2 Index-3 Index-4