HP 4050 manual HP LaserJet 4000 Series Printers

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HP LaserJet 4000 and

4050 Series Printers

Service Manual

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Contents HP LaserJet 4000 Series Printers Page HP LaserJet 4000 and 4050 Series Printers Copyright Hewlett-Packard Company Contents Printer Operation Contents-2Functional Information Contents-3Contents-4 Removing and Replacing PartsContents-5 TroubleshootingContents-6 Overview Printer DescriptionPrinter Features for the HP LaserJet 4000 Series Printer Printer FeaturesSheet Tray Speed Printer Features for the HP LaserJet 4050 Series PrinterSheet Tray 2 HP LaserJet 4050/ 4050 N 6Printer Description LocalTalk 10/100 Base TX Model and Serial Numbers IdentificationSite Requirements Space Requirements Printer Weight without Toner CartridgeEnvironmental Requirements Acoustic Emissions Per ISO Printer State Sound PowerEnvelopes Paper SpecificationsLegal By 14 14Printer Description Maximum Size By 10 178 by 254 mm Supported Types of PaperCutouts or perforations Guidelines for Using PaperSuch as those used in some types of thermography 15. Paper Weight Equivalence Paper Weight Equivalence TableTransparencies LabelsLabel Construction Envelope Construction EnvelopesEnvelopes with Adhesive Strips or Flaps Envelopes with Double Side SeamsEnvelope Storage Envelope Margins16. Envelope Margins Type of Address Top Margin Left Margin Card Stock Construction Card Stock and Heavy PaperCard Stock Guidelines Laser Safety Statement Safety InformationCanadian DOC Regulations FCC Regulations Laserturvallisuus Luokan 1 Laserlaite Klass 1 Laser Apparat Laser Statement for FinlandToner Safety Protecting the Environment Environmental Product StewardshipPrinter design eliminates Printer design reducesService Approach Service Approach Ordering Information Parts and SuppliesHelpful Documentation Description or Use Helpful DocumentationHelpful Documentation Description or Use Part Number Phone Numbers for Ordering HP Service Parts Information Compact DiscExchange Program ConsumablesNorth and Latin America HP Support Assistant Compact DiscAsia/Pacific Europe, Middle East, and Africa Customer Care Reseller Sales and Service Support CenterOther Areas Refilled Toner Cartridges Toner Cartridge InformationRecycling Toner Cartridges Warranty Statement Printer Operation Control Panel Layout Using the Control PanelControl Panel Lights ReadyPaper Size Control Panel KeysControl Panel Keys Function Setting the display language Settings and DefaultsSettings and Defaults Setting or Default ExplanationControl Panel Menus To change a Control Panel settingTo print a Control Panel menu map Quick Copy Jobs Menu Quick Copy Jobs MenuPrivate/Stored Jobs Menu Private/Stored Jobs MenuPrint Menu MAP Information MenuInformation Menu ItemExplanation Envelope Feeder Paper Handling MenuSIZE=COM10 TYPE=PLAINPlain Tray 1 TYPE=Tray 2 TYPE= Tray 3 TYPE=Override A4 LETTER=NO Configure Fuser Mode MENU=NOTYPE=NORMAL Normallow High ROUGH=HIGHPrint Quality Menu RESOLUTION=Fastres Print Quality Menu ValuesDark RET=MEDIUM OFF LightECONOMODE=OFF Toner DENSITY=3 Create CleaningProcess Printing Menu DIMENSION= Inches Millimeters Configure CustomUnit of MEASURE= Inches FORM=PCL Font NUMBER=0 PCL Font Internal SOURCE=INTERNAL SoftPrinting Menu Values SET=PC-8 PCL SymbolCOURIER=REGULAR Regular Dark Wide A4=NOAppend CR to LF= Print PS ERRORS=OFFConfiguration Menu Resource SAVE= PROTECT= 10. Configuration Menu ItemValuesClearable JOB Auto CONTINUE= RAM DISK=OFF RAM Disk SIZE=XXXK Continue Stop Auto Maintenance OFF MESSAGE=OFF Small Paper JAM RECOVERY=Auto OFF SPEED=NORMAL SlowConfigure YES Prores 1200=NO Timeout = OFFQuick Copy Held JOBMenu TIMEOUT=15BUFFER=AUTO Auto Buffer SIZE=SPEED=YES Parallel HighParallel ADV FUNCTIONS=ON SERIALDTR/DSR PACING=DTR/DSR XON/XOFFSerial Baud Serial RobustSerial DTR POLARITY=HIGHEIO Menu Networked Printers CFG ETALK=NO CFG TCP/IP=NOAccessory. HP LaserJet 4050 series printer only Resets Menu13. Resets Menu To enter Service Mode Service ModeSetting the Page Count, Maintenance Count Service MenuSerial Number Mode CountMenu 14. Changing the Page Count Key Press Display DescriptionPAGES=0 Maintenance Page CountDiagnostics Cold Reset PaperClear Event Log Serial NumberEngine Test Testing the PrinterCold Reset Resetting the PrinterTo perform a Cold Reset Clearing NvramMS-DOS System Configuration System ConfigurationParallel DOS Commands Serial MS-DOS Commands Serial Configuration Printer I/O ConfigurationParallel Menu Pacing Handshaking Printer Maintenance Cleaning the Printer and Accessories Inside General Cleaning the Printer Component Cleaning Method / NotesUsing the Printer Cleaning Cleaning Spilled TonerReset Maintenance Count Preventative MaintenanceExpected Life of Components Functional Information AC/DC Power Distribution Power Supply SystemOvercurrent Overvoltage Protection High-voltage Power Distribution Toner Cartridge Detection Engine Controller System 3Engine Controller Board Engine Controller System 4Engine Controller Board I/O 1 8Functional Information Engine Controller Board Inputs and Outputs5Engine Controller Board I/O 2 Engine Controller System 6Engine Controller Board I/O 3 10Functional Information 7Engine Controller Board I/O 4 Engine Controller System Laser and Scanner Drive Solenoids, Sensors, Clutches, and SwitchesPaper Motion Monitoring and Control Engine Test PrintMotors Page Formatter System PowerSaveEconoMode Resolution Enhancement technology REtParallel Interface Input/OutputExpanded I/O HP Fast InfraRed ReceiverDisk Printer MemoryLocal Talk I/O Read Only Memory ROMDimm Slots Random Access Memory RAMNon-Volatile Memory Nvram Memory Enhancement technology MEtPJL Overview ProtectControl Panel PMLImage Formation System Page Toner Cartridge Toner Cartridge11Photosensitive Drum Image Formation System Photosensitive Drum12Cleaning the Drum 26Functional Information Cleaning the Drum13Primary Charging Roller Image Formation System Conditioning the DrumWriting the Image Developing the Image 16Transferring the Image 30Functional Information Transferring the ImageImage Fusing/Variable Fusing Temperature Variable Fusing Temperature 19Paper Feed Subsystem Paper Feed System Paper Feed SystemPaper Path Clutches and Sensors 21Tray 1 Pickup Timing 36Functional Information Printing from TrayTray 1 Pickup 23Tray 2 Pickup Timing 38Functional Information Tray 2 Pickup 25Multi-Feed Prevention Mechanism 40Functional Information Multi-Feed Prevention Mechanism26Paper Feeder Driver I/O Paper Feed System Printing from the Optional 500-sheet Universal TrayPickup and Feeding 28Paper Feed Pickup Paper Feed System Envelope Feed Envelope Feeder30Envelope Feed Pickup Paper Feed System Reversing and Duplexer Pickup Duplexer31Paper Path for the Duplexer Paper Feed System 32Paper Feed for the Duplexer Paper JamPrinter Timing Period Purpose Basic Sequence of OperationTiming Diagram Removing and Replacing Parts Removal and Replacement Strategy Screws Used in the Printer ToolsScrews Used in the Printer Drawing and Description Purpose Hint Rear Right Side Cover Removing CoversControl Panel Overlay Top CoverControl Panel Toner Cartridge Drive Arm Toner cartridge drive arm Rear screws Top screws Release tab if necessary Catches Left Side CoverFront Right Side Cover Rear Cover/Rear Output Bin Tray Page Detail of the Tray 1 Sensor Arm Cover Fuser Removing AssembliesPage Formatter Cage Assembly Output Assembly Page Laser Scanner Fan Main Motor Transfer Roller Tray 1 Pickup Roller Page Envelope feeder connector cover Tray 1 Pickup AssemblyPage Step Toner cartridge guide Right Side Toner Cartridge Guide Registration Assembly Do not Remove Paper Feed Assembly Removing the upper screws from the Paper Feed Assembly By inserting it into the slot, as shown Formatter Pan Gear Train Delivery Drive Assembly Separating the Engine Module from the Paper Feed Module Page Engine Controller Board Back, not on the board Spring Power switch rodRod Adjusting the Top Margin Measure this distance Paper Feed Rollers Separation Rollers Paper Feed Module Plate Paper Feed Module Gear Train Assembly Paper Feed Module Side Rails Page PCA Cover HP LaserJet 4000 T/4000 TN and 4050 T/4050 TN PCA Cover HP LaserJet 4000/4000 N and 4050/4050 N PCA Controller Troubleshooting Major Steps for Troubleshooting Troubleshooting ProcessMajor Steps for Troubleshooting 1Troubleshooting Flowchart 1 4Troubleshooting Troubleshooting FlowchartTroubleshooting Flowchart Troubleshooting Process Preliminary Operating Checks Troubleshooting the Printing SystemCan assist in locating printing errors Power OnPower On Defect or Blank Display Problem ActionIf the Fan is not working Power On Defect or Blank Display ProblemActionDefective AC receptacle or AC power line No AC Power Cause ActionNo DC Power Cause Action Location of Engine Test Button Engine TestPrinting an Engine Test DisplayEvent Log Most recent error up to Print the Event Log Display the Event LogShows a typical Event Log. The Event Log shows Interpret the Event LogPrinter Messages Connection BAD DuplexerCannot Duplex Rear BIN Open Check Input Device Message ActionDisk File Disk Device FailureSystem is Full Not Functional Disk is Write ProtectedFlash File System is Full Flash is Write Protected Install TrayLoading Program Number Do not Power OFFOffline Perform Printer MaintenanceRAM Disk File Operation Failed RAM Disk Device FailureTray X Empty One of the following occurred Tray X Load Type SizeUnsupported Size in Tray YY USE Type Size INSTEAD? Feeder InstalledWrong Envelope XX Paper JAM Location For 13.20 Press GO to Continue Insufficient MemoryPress GO to Continue Serial I/O Buffer Overflow Parallel I/O Buffer OverflowBAD Serial Transmission Printer Error 4Fuser connectors Troubleshooting the Printing System Fuser Error36Troubleshooting 53.XY.ZZ 38Troubleshooting 62.X 69.X Xxxx Printer Error 8X.YYYY Disk volume not present it may be uninitialized Directories has been reached Disk Error Error Description Solution NumberGeneral Paper Path Troubleshooting Page Press Item until Print Paper Path Test appears Paper Path TestMenu Map Information PagesPage 6Sample Menu Map 4050 series printer 50Troubleshooting Configuration Printer Information Installed Paper Personalities Image Quality Verify Installed OptionsImage Quality Checks Image Quality Checks Action Check the Toner Cartridge EconoMode Image Defects 11. Black Possible Cause Action High-voltage power supply connections are contaminatedVoltage 12. Blank Possible Cause ActionPossible Cause Action 13. Blank SpotsCheck the paper or other print media type 14. Creases Possible Cause ActionFor paper type 15. Curl Possible Cause Action16. Contamination on Back Possible Cause Action 17. Distorted Image 19. Faded Print/Bubbles Possible Cause Action 18. Dropouts Possible Cause Action20. Gray Background Possible Cause Action 22. Horizontal Smudges Possible Cause Action 21. Horizontal Black Lines Possible Cause Action23. Horizontal White Lines Possible Cause Action 24. Light Print, Dark Print, or Fade Possible Cause Action 26. Repetitive Defects 25. Loose Toner Possible Cause Action28. Toner Smear Possible Cause Action 27. Skew Possible Cause Action29. Toner Specks Possible Cause Action Paper SPEED=SLOW30. Vertical Black Lines 32. Vertical White Lines 31. Vertical DotsRepetitive Defect Ruler 9Repetitive Defect Ruler Troubleshooting the Printing SystemHalf Self Test Functional Check Image System TroubleshootingDrum Rotation Functional Check 33. High Voltage System Checks Action High-voltage Power Supply Functional CheckEIO Troubleshooting Interface TroubleshootingCommunications Check Test MessagePage Page HP JetDirect Configuration Parallel DOS Commands AUTOEXEC.BAT Standard ConfigurationsSerial DOS Commands 34. Communications Checks ChecksAction Communications ChecksFor Serial Communications Only 34. Communications Checks ChecksAction Locations of Components Reference Diagrams35. Components in Figure Page 13Components of the Duplexer Reference Diagrams Page 15Components of the Envelope Feeder Reference Diagrams Paper Path 17Paper Path with the Duplexer 90Troubleshooting18Paper Path with the Envelope Feeder Reference Diagrams 36. Paper Sensors in Figure SW1 37. Engine Controller Board LayoutPaper Size Detection Switches OFF 39. Motors in Figure 24Location of Motors25Connectors 1 Reference Diagrams Connectors26Connectors 2 98Troubleshooting Page PCAs 28Location of PCAs 100Troubleshooting40. Location of PCAs Sensors and Thermistor 29Location of Sensors and Thermistor 1 102Troubleshooting41. Sensors and Thermistor in -29 and Figure 30Location of Sensors and Thermistor 2104Troubleshooting Solenoids and Clutch 31Location of Solenoids and Clutch 1 Reference Diagrams32Location of Solenoids and Clutch 2 106Troubleshooting 42. Solenoids and Clutch in -31 and Figure 33Location of Switches 108Troubleshooting Switches43. Switches in Figure 34Pickup Timing for Tray 2 and lower trays TimingParts and Diagrams Ordering Parts How To Use the Parts Lists and DiagramsOrdering Consumables Replacement parts and cannot be ordered Accessories and Supplies Description Exchange No Product No Accessories and SuppliesAccessories and Supplies Description Exchange No. Product No Screws Used in the Printer Description Common Screws and Replacement CablesReplaceable Cables Description Table No Item No 1Assembly Location Diagram 8Parts and Diagrams Illustrations and Parts ListsFormatter C4251-69001 4050 only 2External Covers and Panels 10Parts and Diagrams Illustrations and Parts Lists 3Top Cover Assembly 12Parts and Diagrams Top Cover Assembly Item No Quantity Description 1211 Internal Components 1 Item No. Part No Quantity Description 13 12 227 Internal Components 2 Item No Quantity Description 18Parts and Diagrams Illustrations and Parts Lists 6Internal Components 3 20Parts and Diagrams Internal Components 3 Item No Quantity Description 7Engine Controller Board Assembly 22Parts and Diagrams Illustrations and Parts Lists 11. Delivery Drive Assembly Item No Quantity Description 8Delivery Drive Assembly12. Printer Drive Assembly Item No Quantity Description 9Printer Drive Assembly10Tray 1 Pickup Assembly 26Parts and Diagrams 13. Tray 1 Pickup Assembly Item No Quantity Description 14. Tray 1 Assembly Item No Quantity Description 11Tray 1 Assembly15. Paper Feed Assembly Item No Quantity Description 12Paper Feed Assembly16. Registration Assembly Item No Quantity Description 13Registration Assembly17. Paper Feed Guide Assembly Item No Quantity Description 15Delivery Assembly 32Parts and Diagrams 18. Delivery Assembly Item No Quantity Description 16Fuser Assembly 1 17Fuser Assembly 2 614 Connector 250- and 500-sheet Feeder Paper Pickup Drive Assembly 22. Paper Pickup Drive Assembly Item No Quantity Description Sheet Tray 23 -sheet Tray Item No Quantity Description Page Illustrations and Parts Lists Page Connector 250- and 500-sheet Feeder 23Upper Paper Pickup Drive Assembly 24Lower Paper Pickup Drive Assembly 48Parts and Diagrams 28 -sheet Tray Item No Quantity Description Page XD2-1100-502CN Ring, E RG5-2690-000CN Page Illustrations and Parts Lists 28Envelope Feeder 54Parts and Diagrams 31. Envelope Feeder Item No Exchange No Quantity Description 29Internal Components of Duplexer 56Parts and Diagrams Illustrations and Parts Lists Alphabetical Parts List RB1-8907-000CN 25 on Tray 60Parts and Diagrams Mrom 62Parts and Diagrams Illustrations and Parts Lists 64Parts and Diagrams Toner Cartridge 6,000 Pages 66Parts and Diagrams Numerical Parts List 68Parts and Diagrams Illustrations and Parts Lists 70Parts and Diagrams Mounting Assembly Separation 72Parts and Diagrams Illustrations and Parts Lists 74Parts and Diagrams Index-1 IndexIndex-2 Index-3 Index-4 Wiring Diagram HP LaserJet 4000/4000N Wiring Diagram HP LaserJet 4000 T/4000TN Page C4251-91003
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