HP 4050, 4000 manual No DC Power Cause Action

Page 212

Table 7-4. No DC Power

Cause

Action

No AC power is supplied.

The overcurrent/overvoltage detection circuit activated.

Check the AC power supply. See Table 7-3, “No AC Power,” on page 7-9

If the problem is not rectified after the power switch is turned off and on again, find the cause of activation of the overcurrent/overvoltage detection circuit in the power supply. Wait for more than two minutes before turning the printer back on.

Blown fuse.	1.	Check the fuses (FU1 and FU2) on the
	Engine Controller Board.
	2.	Replace the fuses if necessary.

7-10Troubleshooting

Image 212

Contents HP LaserJet 4000 Series Printers Page HP LaserJet 4000 and 4050 Series Printers Copyright Hewlett-Packard Company Contents Contents-2 Printer OperationContents-3 Functional InformationRemoving and Replacing Parts Contents-4Troubleshooting Contents-5Contents-6 Printer Description OverviewPrinter Features Printer Features for the HP LaserJet 4000 Series PrinterSheet Tray Printer Features for the HP LaserJet 4050 Series Printer SpeedSheet Tray 2 HP LaserJet 4050/ 4050 N 6Printer Description LocalTalk 10/100 Base TX Identification Model and Serial NumbersSite Requirements Printer Weight without Toner Cartridge Space RequirementsAcoustic Emissions Per ISO Printer State Sound Power Environmental RequirementsPaper Specifications EnvelopesLegal By 14 14Printer Description Supported Types of Paper Maximum Size By 10 178 by 254 mmGuidelines for Using Paper Cutouts or perforationsSuch as those used in some types of thermography Paper Weight Equivalence Table 15. Paper Weight EquivalenceLabel Construction LabelsTransparencies Envelopes Envelope ConstructionEnvelopes with Double Side Seams Envelopes with Adhesive Strips or Flaps16. Envelope Margins Type of Address Top Margin Left Margin Envelope MarginsEnvelope Storage Card Stock Guidelines Card Stock and Heavy PaperCard Stock Construction Canadian DOC Regulations Safety InformationLaser Safety Statement FCC Regulations Laser Statement for Finland Laserturvallisuus Luokan 1 Laserlaite Klass 1 Laser ApparatToner Safety Environmental Product Stewardship Protecting the EnvironmentPrinter design eliminates Printer design reducesService Approach Service Approach Parts and Supplies Ordering InformationHelpful Documentation Helpful Documentation Description or UseHelpful Documentation Description or Use Part Number HP Service Parts Information Compact Disc Phone Numbers for OrderingExchange Program ConsumablesAsia/Pacific HP Support Assistant Compact DiscNorth and Latin America Other Areas Customer Care Reseller Sales and Service Support CenterEurope, Middle East, and Africa Recycling Toner Cartridges Toner Cartridge InformationRefilled Toner Cartridges Warranty Statement Printer Operation Using the Control Panel Control Panel LayoutControl Panel Lights ReadyControl Panel Keys Function Control Panel KeysPaper Size Settings and Defaults Setting the display languageSettings and Defaults Setting or Default ExplanationTo print a Control Panel menu map To change a Control Panel settingControl Panel Menus Quick Copy Jobs Menu Quick Copy Jobs MenuPrivate/Stored Jobs Menu Private/Stored Jobs MenuInformation Menu ItemExplanation Information MenuPrint Menu MAP Paper Handling Menu Envelope FeederSIZE=COM10 TYPE=PLAINTray 1 TYPE= PlainTray 2 TYPE= Tray 3 TYPE=Configure Fuser Mode MENU=NO Override A4 LETTER=NOTYPE=NORMAL Normallow High ROUGH=HIGHRESOLUTION= Print Quality MenuFastres Print Quality Menu ValuesECONOMODE=OFF RET=MEDIUM OFF LightDark Process CleaningToner DENSITY=3 Create Printing Menu Inches Millimeters Configure Custom DIMENSION=Unit of MEASURE= Inches FORM=Printing Menu Values PCL Font Internal SOURCE=INTERNAL SoftPCL Font NUMBER=0 PCL Symbol SET=PC-8COURIER=REGULAR Regular Dark Wide A4=NOPrint PS ERRORS=OFF Append CR to LF=Configuration Menu Resource SAVE= Clearable JOB Auto CONTINUE= 10. Configuration Menu ItemValuesPROTECT= RAM DISK=OFF RAM Disk SIZE=XXXK Continue Stop Auto JAM RECOVERY= Maintenance OFF MESSAGE=OFF Small PaperAuto OFF SPEED=NORMAL SlowTimeout = OFF Configure YES Prores 1200=NOQuick Copy Held JOBTIMEOUT=15 MenuBUFFER=AUTO Auto Buffer SIZE=Parallel High SPEED=YESParallel ADV FUNCTIONS=ON SERIALDTR/DSR PACING=DTR/DSR XON/XOFFSerial Robust Serial BaudSerial DTR POLARITY=HIGHEIO Menu Networked Printers CFG TCP/IP=NO CFG ETALK=NO13. Resets Menu Resets MenuAccessory. HP LaserJet 4050 series printer only Service Mode To enter Service ModeSerial Number Service MenuSetting the Page Count, Maintenance Count Count ModeMenu 14. Changing the Page Count Key Press Display DescriptionMaintenance Page Count PAGES=0Cold Reset Paper DiagnosticsClear Event Log Serial NumberTesting the Printer Engine TestResetting the Printer Cold ResetTo perform a Cold Reset Clearing NvramParallel DOS Commands System ConfigurationMS-DOS System Configuration Serial MS-DOS Commands Parallel Menu Printer I/O ConfigurationSerial Configuration Pacing Handshaking Printer Maintenance Cleaning the Printer and Accessories Cleaning the Printer Component Cleaning Method / Notes Inside GeneralCleaning Spilled Toner Using the Printer CleaningPreventative Maintenance Reset Maintenance CountExpected Life of Components Functional Information Power Supply System AC/DC Power DistributionOvercurrent Overvoltage Protection High-voltage Power Distribution Toner Cartridge Detection Engine Controller System 3Engine Controller Board Engine Controller System Engine Controller Board Inputs and Outputs 4Engine Controller Board I/O 1 8Functional Information5Engine 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 Solenoids, Sensors, Clutches, and Switches Laser and Scanner DrivePaper Motion Monitoring and Control Engine Test PrintMotors Page PowerSave Formatter SystemResolution Enhancement technology REt EconoModeInput/Output Parallel InterfaceExpanded I/O HP Fast InfraRed ReceiverPrinter Memory DiskLocal Talk I/O Read Only Memory ROMRandom Access Memory RAM Dimm SlotsNon-Volatile Memory Nvram Memory Enhancement technology MEtProtect PJL OverviewPML Control PanelImage Formation System Page Toner Cartridge Toner CartridgePhotosensitive Drum 11Photosensitive Drum Image Formation SystemCleaning the Drum 12Cleaning the Drum 26Functional InformationConditioning the Drum 13Primary Charging Roller Image Formation SystemWriting the Image Developing the Image Transferring the Image 16Transferring the Image 30Functional InformationImage Fusing/Variable Fusing Temperature Variable Fusing Temperature Paper Feed System 19Paper Feed Subsystem Paper Feed SystemPaper Path Clutches and Sensors Printing from Tray 21Tray 1 Pickup Timing 36Functional InformationTray 1 Pickup 23Tray 2 Pickup Timing 38Functional Information Tray 2 Pickup Multi-Feed Prevention Mechanism 25Multi-Feed Prevention Mechanism 40Functional InformationPrinting from the Optional 500-sheet Universal Tray 26Paper Feeder Driver I/O Paper Feed SystemPickup and Feeding 28Paper Feed Pickup Paper Feed System Envelope Feeder Envelope Feed30Envelope Feed Pickup Paper Feed System Duplexer Reversing and Duplexer Pickup31Paper Path for the Duplexer Paper Feed System Paper Jam 32Paper Feed for the DuplexerBasic Sequence of Operation Printer Timing Period PurposeTiming Diagram Removing and Replacing Parts Removal and Replacement Strategy Tools Screws Used in the PrinterScrews Used in the Printer Drawing and Description Purpose Hint Removing Covers Rear Right Side CoverTop Cover Control Panel OverlayControl Panel Toner Cartridge Drive Arm Toner cartridge drive arm Rear screws Top screws Release tab if necessary Left Side Cover CatchesFront Right Side Cover Rear Cover/Rear Output Bin Tray Page Detail of the Tray 1 Sensor Arm Cover Removing Assemblies FuserPage Formatter Cage Assembly Output Assembly Page Laser Scanner Fan Main Motor Transfer Roller Tray 1 Pickup Roller Page Tray 1 Pickup Assembly Envelope feeder connector coverPage 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 Back, not on the board Spring Power switch rod Engine Controller BoardRod 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 Troubleshooting Process Major Steps for TroubleshootingMajor Steps for Troubleshooting Troubleshooting Flowchart 1Troubleshooting Flowchart 1 4TroubleshootingTroubleshooting Flowchart Troubleshooting Process Troubleshooting the Printing System Preliminary Operating Checks Power On Can assist in locating printing errors Power On Defect or Blank Display Problem ActionPower On Defect or Blank Display ProblemAction If the Fan is not workingNo AC Power Cause Action Defective AC receptacle or AC power lineNo DC Power Cause Action Engine Test Location of Engine Test ButtonDisplay Printing an Engine TestEvent Log Most recent error up to Display the Event Log Print the Event LogInterpret the Event Log Shows a typical Event Log. The Event Log showsPrinter Messages BAD Duplexer ConnectionCannot Duplex Rear BIN Open Check Input Device Message ActionSystem is Full Disk Device FailureDisk File Disk is Write Protected Not FunctionalFlash File System is Full Install Tray Flash is Write ProtectedDo not Power OFF Loading Program NumberPerform Printer Maintenance OfflineRAM Disk Device Failure RAM Disk File Operation FailedTray X Empty Tray X Load Type Size One of the following occurredWrong Envelope Feeder InstalledUnsupported Size in Tray YY USE Type Size INSTEAD? XX Paper JAM Location For 13.20 Insufficient Memory Press GO to ContinueParallel I/O Buffer Overflow Press GO to Continue Serial I/O Buffer OverflowBAD Serial Transmission Printer Error Fuser Error 4Fuser connectors Troubleshooting the Printing System36Troubleshooting 53.XY.ZZ 38Troubleshooting 62.X 69.X Xxxx Printer Error 8X.YYYY Disk volume not present it may be uninitialized Disk Error Error Description Solution Number Directories has been reachedGeneral Paper Path Troubleshooting Page Paper Path Test Press Item until Print Paper Path Test appearsInformation Pages Menu MapPage 6Sample Menu Map 4050 series printer 50Troubleshooting Configuration Printer Information Installed Paper Personalities Image Quality Checks Image Quality Checks Action Verify Installed OptionsImage Quality Check the Toner Cartridge EconoMode Image Defects High-voltage power supply connections are contaminated 11. Black Possible Cause Action12. Blank Possible Cause Action Voltage13. Blank Spots Possible Cause Action14. Creases Possible Cause Action Check the paper or other print media type15. Curl Possible Cause Action For paper type16. Contamination on Back Possible Cause Action 17. Distorted Image 18. Dropouts Possible Cause Action 19. Faded Print/Bubbles Possible Cause Action20. Gray Background Possible Cause Action 23. Horizontal White Lines Possible Cause Action 21. Horizontal Black Lines Possible Cause Action22. Horizontal Smudges Possible Cause Action 24. Light Print, Dark Print, or Fade Possible Cause Action 25. Loose Toner Possible Cause Action 26. Repetitive Defects27. Skew Possible Cause Action 28. Toner Smear Possible Cause Action30. Vertical Black Lines Paper SPEED=SLOW29. Toner Specks Possible Cause Action 31. Vertical Dots 32. Vertical White Lines9Repetitive Defect Ruler Troubleshooting the Printing System Repetitive Defect RulerImage System Troubleshooting Half Self Test Functional CheckDrum Rotation Functional Check High-voltage Power Supply Functional Check 33. High Voltage System Checks ActionInterface Troubleshooting EIO TroubleshootingCommunications Check Test MessagePage Page HP JetDirect Configuration Serial DOS Commands AUTOEXEC.BAT Standard ConfigurationsParallel DOS Commands For Serial Communications Only Communications Checks34. Communications Checks ChecksAction 34. Communications Checks ChecksAction Reference Diagrams Locations of Components35. Components in Figure Page 13Components of the Duplexer Reference Diagrams Page 15Components of the Envelope Feeder Reference Diagrams 17Paper Path with the Duplexer 90Troubleshooting Paper Path18Paper Path with the Envelope Feeder Reference Diagrams 36. Paper Sensors in Figure 37. Engine Controller Board Layout SW1Paper Size Detection Switches OFF 24Location of Motors 39. Motors in FigureConnectors 25Connectors 1 Reference Diagrams26Connectors 2 98Troubleshooting Page 28Location of PCAs 100Troubleshooting PCAs40. Location of PCAs 29Location of Sensors and Thermistor 1 102Troubleshooting Sensors and Thermistor30Location of Sensors and Thermistor 2 41. Sensors and Thermistor in -29 and Figure104Troubleshooting 31Location of Solenoids and Clutch 1 Reference Diagrams Solenoids and Clutch32Location of Solenoids and Clutch 2 106Troubleshooting 42. Solenoids and Clutch in -31 and Figure Switches 33Location of Switches 108Troubleshooting43. Switches in Figure Timing 34Pickup Timing for Tray 2 and lower traysParts and Diagrams Ordering Consumables How To Use the Parts Lists and DiagramsOrdering Parts Replacement parts and cannot be ordered Accessories and Supplies Accessories and Supplies Description Exchange No Product NoAccessories and Supplies Description Exchange No. Product No Common Screws and Replacement Cables Screws Used in the Printer DescriptionReplaceable Cables Description Table No Item No Illustrations and Parts Lists 1Assembly Location Diagram 8Parts and DiagramsFormatter 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 8Delivery Drive Assembly 11. Delivery Drive Assembly Item No Quantity Description9Printer Drive Assembly 12. Printer Drive Assembly Item No Quantity Description10Tray 1 Pickup Assembly 26Parts and Diagrams 13. Tray 1 Pickup Assembly Item No Quantity Description 11Tray 1 Assembly 14. Tray 1 Assembly Item No Quantity Description12Paper Feed Assembly 15. Paper Feed Assembly Item No Quantity Description13Registration Assembly 16. Registration Assembly Item No Quantity Description17. 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 Index-1Index-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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