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HP 6L, 5L manual Fuser Jam Clearing Countermeasure, C3941A-02A, Service Notes C-3

Models: 5L 6L

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Fuser Jam Clearing Countermeasure

C3941A-02A

S E R V I C E N O T E

SUPERSEDES: C3941A-02

HP C3941A LaserJet 5L

Serial Numbers:

JPBK000000 / JPBK016388

JPBL000000 / JPBL055374

JPCW000000 / JPCW043448

JPVW000000 / JPVW081157

USCB000000 / USCB302011

JPBV000000 / JPBV010501

JPVV000000 / JPVV216255

CNVM000000 / CNVM175233

CNVN000000 / CNVN189964

LaserJet 5L Printer Fuser Jam Clearing Countermeasure

To Be Performed By: HP-Authorized Personnel

Parts required: RB1-7334-000CN JP (Jam Prevention) Protector

General Description:

When a paper jam occurs in the LaserJet 5L it will commonly occur in the fuser area, with the paper folding accordion-style between the fuser and delivery assembly. The paper jams in the fuser can be such that the customers cannot remove the paper and the printer requires servicing. Customers attempting to clear the jams often cause damage to the printer. This countermeasure will not prevent paper jams, but will allow users to clear the paper jams without damaging the printer.

				Continued
		DATE	10 June 1996
ADMINISTRATIVE INFORMATION

SERVICE NOTE CLASSIFICATION:
	MODIFICATION RECOMMENDED
ACTION	IMMEDIATELY	STANDARDS:
CATEGORY:	ON SPECIFIED FAILURE	LABOR: 0.5 Hours
	AGREEABLE TIME
LOCATION	CUSTOMER INSTALLABLE	SERVICE	RETURN		USED	RETURN
CATEGORY:	ON-SITE	INVENTORY:	SCRAP		PARTS:	SCRAP
	HP LOCATION		SEE TEXT			SEE TEXT

AVAILABILITY:	PRODUCT’S SUPPORT LIFE	RESPONSIBLE UNTIL: 10 May 1998

AUTHOR: SKL	ENTITY: 4600	ADDITIONAL INFORMATION: Reissued to correct Figure A.

C Service Notes

Service Notes C-3

Image 198

HP 6L, 5L manual Fuser Jam Clearing Countermeasure, C3941A-02A, Service Notes C-3

Contents

Page HP LaserJet 5L HP LaserJet 6L C3941A C3990A Warranty Conventions Here are required statements regarding RFI and laser safety Chapter DescriptionsList of Figures Figure B-1 Vcci Statement Japan List of Tables Viii Contents Product InformationProduct Information Features Descriptions Printer FeaturesPrinter Features Paper Capacities and SizesIdentification Model and SerialHP LaserJet 5L Model and Serial Numbers HP LaserJet 6L Model and Serial Numbers Electrical Specifications SpecificationsPerformance Specifications Acoustic EmissionsProduct Overview Front/Side Views of the PrinterFront Door Assemblies Back View of the Printer Ordering Parts Service ApproachParts Exchange Program Ordering ConsumablesRelated Documentation DescriptionOnline Services for Technical AssistanceWorldwide Support North American Response CenterWarranty Warranty ExclusionsProducts sold within one country to another country Warranty LimitationsVoltage Conversions Regulatory requirementsProduct Information Site Requirements Site Requirements Operating Environment Consider the following points before installing the printerSite Requirements Environmental RequirementsPrinter Space Requirements Printer Dimensions Description DimensionPrinter Space Requirements HP C3906A/F Toner Cartridge Storage ConditionsStoring Opened Toner Cartridges Toner Cartridge Handling Suggestions Toner Cartridge DistributionOperating Overview Operating Overview Using 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 Lights Action Result Printing a Self-Test Self-test Page for HP LaserJet 5LTo print a self-test Self-test Page for HP LaserJet 6LContinuous Self Test Printer’s rated speedPrinting an Engine Test Useful for checking and adjusting registrationRefer to Engine Test in for the engine test procedure Engine Test ButtonResetting the Printer To Reset the PrinterOperating Overview Printer Maintenance Printer Maintenance Life Expectancy of Consumables Life Expectancy of ConsumablesToner cartridge box Toner Cartridge LifeSaving Toner with EconoMode Five Percent Text CoverageRecycling Toner Cartridges Some software applications may refer to this as draft modeRefilled Toner Cartridges InformationCleaning the Printer Cleaning Printer Components Contaminants on the roller can cause print quality problemsCleaning Printer Components Cleaning Spilled Toner Stains into fabricFunctional 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 T e Functional Overview Resolution Enhancement REt Control PanelEconoMode vs Normal Mode EconoModeMemory Enhancement technology MEt Functional Overview 5 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 HP LaserJet 5L General Timing Diagram HP LaserJet 6L Functional Overview Removal and Replacement Removal and Replacement Removal and Replacement Strategy Removal and Replacement Installing Memory Cards Dram MByte card MByte totalBack Cover Ease of replacementCovers and Doors Remove the 3 screws -2, calloutMake certain the Input Extender is up Back Cover Removal 2EP Door Assembly EP Door Assembly RemovalMemory Door Memory Door RemovalRemove the toner cartridge Remove memory door Main Cover and Paper Input AssemblyMain Cover and Paper Input Assembly Removal Without removing the memory doorInternal 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 Make sure the connectors are properly reattached Lift the Heating Element outHeating Element Removal 3 Pressure Roller On the right side of the shaft. Refer to for a part numberPressure Roller Guide Removal Unchanged. -17 shows the lever from an HP LaserJet 5L Face-Up/Face-Down Lever ReplacementFace-Up/Face-Down Lever Release mechanismFuser Exit Roller Assembly Shows the white tab from an HP LaserJet 5LFuser Exit Roller Removal Reinstalled to exactly this position Paper Exit Sensor Flag ReplacementPaper Exit Sensor Flag Laser/Scanner Assembly Laser/Scanner Assembly RemovalTop Assemblies Solenoid Solenoid Removal 1Only one way Solenoid Removal 2Pickup Roller Assembly Pickup Roller Assembly Removal 1Pickup Roller Assembly Removal 2 Assembly Figure Paper Pickup Roller Assembly Replacement Inside/Front ViewPaper Feed Frame Paper Feed Frame Removal 1Paper Feed Frame Removal 2 Paper Feed Frame Removal 3 Release the sensor unit connector Figure Paper Feed Frame Removal 4Transfer Roller Guide & Transfer Roller Kick Plate Kick Plate RemovalKick Plate Spring Replacement Separation Pad Separation Pad RemovalPlace your index finger on the subpad SubpadsAt the same time Press toward the top of the printerFeed Assembly Feed Assembly Removal 1Remove the Feed Assembly Feed Assembly Removal 2Feed Assembly Removal 3 Bottom Assemblies Memory Door GuideMemory Door Guide Removal Motor Motor RemovalDC Controller DC Controller Removal 1ESD Sensitive DC Controller Removal 2DC Controller Removal 3 Formatter PCA Correct pieces should you need to replace themFormatter Board Removal Removal and Replacement Troubleshooting Troubleshooting General Troubleshooting Flowchart StartExit Paper Path and Components Paper Path and ComponentsDC Controller Diagram ∙ Status Messages ∙ Service and Error Messages Printer Error TroubleshootingPriority of Errors PersistsPrinter Status Messages Printer Status Messages 1LEDs Description Recommended Action Happens, troubleshoot using -3 below Unclearable ErrorPrinter Status Messages 2 Service 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 CartridgeOz grams Image Defect Examples ∙ Replace the DC ControllerVertical Lines Character Voids ∙ Your paper may not meet the requirements for the printerDropouts ∙ Replace the DC Controller Troubleshooting Is completely blank. If you get occasional blank pagesWhite Horizontal Line Distorted Image or BD Failure Troubleshooting Checks Engine TestEngine Test Troubleshooting 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 Remove the Printer Covers Figures 6-2, 6-3, Troubleshooting ToolsPaper Path Check Overriding PS204 and SW101Repetitive Image Defect Ruler Repetitive Image Defect RulerMain Wiring Diagram TroubleshootingConnector Signal Name Remarks Cable PinoutsFrsth 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 Qty Description Internal Components 1 LaserJet 5L Part No Internal Components 2 LaserJet 5LPart No Internal Components 3 Parts and Diagrams DC Controller/Formatter and Cables DC Controller Case Pickup Roller Assembly Parts and Diagrams Feed Assembly Parts and Diagrams Separation Guide Assembly Parts and Diagrams Delivery Assembly Parts and Diagrams Parts and Diagrams Parts Index Parts Index A-1Alphabetical Parts List Parts IndexParts Index Parts Index A-3 IndexParts Index Parts Index A-5 501/502 Parts Index A-7 Numerical Parts IndexNumerical Parts List Parts Index A-9 Parts Index Parts Index A-11 Parts Index Laser Safety U.S.A Regulatory InformationLaser Statement Finland Regulatory InformationToner Safety Ozone EmissionRegulatory Information B-3 FCC Statement Class B Figure B-1Service Notes C-1 Fuser Accordian JamsC3941A-01 Service Notes SolutionService Notes C-3 Fuser Jam Clearing CountermeasureC3941A-02A Service Notes Index Index-1Index-2 Safety Index-3Index-4 C3990-90991