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HP 4 C2001A, C2021A, 5n C3952A, 5 C3916A, 5m C3917A, 4 plus C2037A 3b Top Cover Assembly for LaserJet

Models: 4 plus C2037A 5m C3917A C2021A 5n C3952A 4 C2001A 5 C3916A

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Troubleshooting Specifications Install Parts list Error codes Parts and Diagrams Solenoid Signals Setting the Cold Reset Default Wires in the gear cover slots Warranty

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Figure 8-3b Top Cover Assembly for LaserJet 5

Parts and Diagrams 8-11

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HP 4 C2001A, C2021A, 5n C3952A, 5 C3916A, 5m C3917A, 4 plus C2037A manual 3b Top Cover Assembly for LaserJet

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Contents

Page Warranty T e ConventionsPage Contents Page Preventive Maintenance Functional Overview Removal and Replacement Troubleshooting Duplexer Parts and Diagrams LaserJet 5/5M/5N Printer Page Contents-10 Product Information Printer Features Product Family Compatibility Matrix Product Family Information CodeMeaning Identification Printer Identification Label for the HP LaserJet 4/4M HP LaserJet 4 and 4 Plus SpecificationsPrinter Dimensions Power Specifications Environmental Specifications Electrical Specifications HP LaserJet 4 Plus Documents-Description Part Number Related DocumentationPrinter Documentation HP LaserJet 4 Documents-Description Part Number U t i o n Safety InformationProduct and Laser Safety FCC RFI Statement Laserturvallisuus Luokan 1 Laserlaite Laser Statement Sweden/Finland Ozone Statement Toner Safety HP FIRST, Europe Doing Business with HPTechnical Assistance HP Asap 1-800-333-1917 U.S Printer Drivers HP CompuServe ForumCustomer Information Centers Customer Support Center Assist Line Other Areas European Customer Support Center Site Requirements Site Planning Requirements Space Requirements Printer Space Requirements Media Specifications for PC Tray Tray Print Media SpecificationsMedia Specifications for MP Tray Tray LaserJet 4 Plus, 4M Plus, 5, 5M, and 5N printers Media Specifications for Optional LC Tray TrayMedia Specifications for Duplex Assembly HP Label Construction Adhesive Labels Envelopes Overhead Transparencies Envelope Construction Specifications for EnvelopesSpecifications Dimensions Site Planning and Requirements Introduction Configuration Control Panel Keys Using The Control PanelSee Appendix B for LaserJet 5 information Indicator Mode Description Indicator Lights Key Function Control Panel Key Functions Reset Menu Functions Reset Menu Control Panel Menus Control Panel Map Options Explanation Printer Menu Items Job Menu Items PCL Menu Items Configuration Menu Items Parallel Menu Items Memory Configuration Items Test Menu Items Serial Menu Items Protection HP LaserJet 4 only Printer Features Resource Saving HP LaserJet 4 Plus and 5 only Buffering HP LaserJet 4 Plus and 5 only EconoMode HP LaserJet 4 Plus and 5 only Resolution Enhancement REt Density HP LaserJet Utility Macintosh Remote Control Panel DOSSelect Use Password from the Printer Passwords box Network Security Ascii PJL Escape Sequence HP JetAdmin Utility Novell NetworksEC %-12345X@PJL JOB PASSWORD=numeric password Select Lock Printer Control Panel Refer to Appendix B for LaserJet 5 information Service Mode Setting the Page Count Setting the Cold Reset Default Cold Reset Self Test Printout Items for the HP LaserJet 4/4M Understanding the PCL Self Test Printout HP LaserJet 4/4M PCL Self Test Printout Plus Self Test Printout Items HP LaserJet 4 Plus/4M HP LaserJet 4 Plus/4M Plus PCL Self Test Printout Changing the Control Panel Display Language Test Print Button Location Test Print Button Test Print Pattern Parallel DOS Commands System ConfigurationMS-DOS System Configuration Serial MS-DOS Commands Parallel Menu Printer I/O ConfigurationSerial Configuration Pacing Handshaking DB-9 RS-232 Serial Connection HP LaserJet Serial Cable Pin-outs DB-25 RS-232 Serial Connection HP LaserJet 4 Plus/5 C2932A Cable Pinout for 9 to 9 Pin Connector DB-25 Serial Connection HP LaserJet 17255D Cable Pinout for 25 to 25 Pin Connector 10 C2933A Cable Pinout for 9 to 25 Pin Connector 11 RS-422A Cable Pinout RS-422A Serial Configuration LaserJet 4 only Modular I/O Configuration Printer Drivers Install Printer Drivers and UtilitiesHow to Obtain Printer Drivers DOS Utilities Canada Packing ChecklistPacking the Printer Repackaging Instructions 12 Installing the Printer on the Lower Cassette Installing The Optional Lower Cassette 13 Pull the cassette tray straight out of the printer 14 Adjust the cassette for the paper size you want to load Configuration Exec 20 Slide the cassette back into the Lower Cassette assembly 21 Remove the Black Plastic Cover Envelope Feeder Installation LaserJet LaserJet 4 and 4 Plus Protecting the Simm Board Simm Installation 23 Identifying the Four Simm Slots 12Minimum Memory Recommendations LaserJet 4 Only PCL Only PostScript Only Resolution 300 dpi 600 dpiMemory Requirements HP LaserJet 4+/4M+/5/5M/5N Simm boardsHP LaserJet 4/4M Installing the Simm Boards Accessing the Simm Slots 25 Installing the Simm Board Running a Self Test Printout Testing a Simm BoardMemory Simm Personality Simm PostScript Service / Error Messages Troubleshooting a Simm Board Configuration Preventive Maintenance Life Expectancy of Consumables Selected Service Consumables Maintenance Checkpoints Service Checkpoints Cleaning Your Printer Toner Cartridge Storing the Toner Cartridge Saving Toner with EconoMode HP LaserJet 4 Plus and 5 Only Removing the Toner Cartridge Sealing Tape Installing the Toner Cartridge Inserting the Toner Cartridge Non-HP Toner Cartridges Clearing the Toner LOW Message Removing the MP Tray Tray 1 Pickup Roller Periodic Maintenance Procedures Removing the MP Tray Tray 1 Separation Pad Removing the PC Tray 2 Pickup Roller Removing the Lower Cassette Pickup Roller Removing the Lower Cassette LC or Tray 3 Pickup Roller Replacing the Transfer Roller Removing and Replacing the Transfer Roller Replacing the Transfer Roller Removing the Transfer Roller Functional Overview DC Controller System DC Controller Loads DC Controller Loads Serial Data Flow Serial Data Communication Solenoid Description Solenoid SignalsSolenoids LJ 4 / 4 Plus Photosensors Sensor Description Photosensor Signals Microswitches PC Tray 2 and LC Tray 3 Tray Size Sensing System Microswitch SignalsSwitch Description Switch Settings for PC Tray 2 and LC Tray Motors Motors Description Paper Jam DetectionMotors Control Formatter System Formatter PCA-Functional Areas Data Processing Memory Management PJL Overview Image Formation System Image Formation System Drum Sensitivity Photosensitive Drum Drum Cleaning Station Cleaning Stage Primary Charging Roller Conditioning Stage Writing Stage 11 Drum Signals 12 Image Development Developing Stage 13 Developing Potentials 14 Transfer of the Toner Image and Paper Separation Transferring Stage 15 Fusing the Toner to the Paper Fusing Stage Paper Feed System 16 Input Paper Feed System Diagram 17 Paper Feed Assembly Sectional View Part Description 18 MP Tray Tray 1 to Output Tray Paper Path Printing from the MP Tray Tray Printing from the PC Tray Tray Power System 20 Power System Block Diagram Standard Printer Operation Basic Sequence of Operation Timing Diagrams 21 MP Tray Timing Diagram-HP LaserJet 4/4M This a 2 panel pull-out Standby Period PowerSaveWarmup Period Initial Rotation Period Page Print Period Page Last Rotation Period U t i o n T e Removal and Replacement Required Tools Required ToolsHardware Review Drawing Description Purpose Printer Hardware Descriptions LJ 4/4 Plus Removing the CoversRight Side Cover Removal Front Top Cover Screws and Latches Top Cover Removal Control Panel Cable Left Side Cover Latches Left Side Cover Removal Releasing the Door Support Rear Door Removal 7a Releasing the Door Hinge LaserJet 4/5 Font Door Removal LaserJet 4 shown Font Door Cover Removal LJ 5 Right Front Cover Removal Font Door Cover Latches 10 Removing the MP Tray Door Multi-Purpose MP Tray Tray 1 Door Removal 11 Remove the Crossmember Bracket Multi-Purpose MP Tray Tray 1 Removal 12 Rotate the Tray Down to Release the Hinge from its Slots Assemblies Removal Power Supply Removal 13b Remove the Sheet Metal Plate LaserJet 4 Plus/5 15 6-wire and 3-wire Connectors for the Power Supply 16 Paper Feed Assembly Screws and Connectors Paper Feed Assembly Removal 17 MP Tray Opening Cover 18 Paper Feed Assembly Screws numbered 19 Hvps Screws 2 and Latches 2 Bottom View High Voltage Power Supply Hvps Removal U t i o n Fuser Assembly Removal 21 Control Panel Latches Control Panel and Overlay Removal 22 Changing the Control Panel Overlay LaserJet Removing the SIMMs Door LaserJet 4 Plus/5 23b Opening the SIMMs Door LaserJet 4 Plus 24a Formatter Cage Screws Right Side View LaserJet 4 T e Formatter Cage Removal 24b Formatter Cage Screws Right Side View LaserJet 4 Plus Formatter PCA Removal 25a Formatter Cover and PCA Mounting Screws LaserJet LaserJet 4 Formatter PCA 25b Interface Connector Support Screws LaserJet T e Plus Interface Connector Support Screws LaserJetLaserJet 4 Plus and 5 Formatter PCA DC Controller Removal 27a DC Controller Connectors/Retaining Clips LaserJet T e Removal and Replacement DC Controller Installation 28 Leading Edge Registration Adjustment Dimensions 30 Main Motor Assembly Main Motor Assembly Removal 31 Gear Assembly Screws Located behind Main Motor Gear Assembly Removal Fan Removal Fan Connector 33 Exhaust Fan Removal Laser Jet 4 shown 34 Output Assembly Removal Output Assembly Removal Exit Sensor Paper Exit Sensor PS3 Removal 36 Scanner Assembly Removal Scanner Assembly Removal Lower Cassette Sensor PCA Removal Lower Cassette Assemblies 38 Lower Cassette Upper Front Cover Lower Cassette Pickup Motor Removal 39 Lower Cassette Motor Replacing Fuser Assembly Parts Fuser Assembly Configuration Fuser Assembly ConfigurationFuser Assembly 41 Fuser End Cap Removal LaserJet 4 only Removing the Fuser Roller Heat Lamp 42 Fuser Wire Harness Cover Removal LaserJet 42b Fuser Cover End Latches LaserJet 4 Plus 43 Left Side Fuser Cover Bushing on the left side of the Fusing Roller Gear Side Heat Lamp Connector Fuser Gear Cap Removal Wires in the gear cover slots 46 Fuser Thermoswitch Connectors Fuser Assembly Thermoswitch Removal Thermistor Removal 47 Thermistor Connector 48a Upper Fuser Frame Removal LaserJet 48b Upper Fuser Frame Removal LaserJet 4 Plus 49 Paper Control PCA Retaining Screws and Latches Paper Control PCA Removal 50 Sensor PCA Removal Sensor PCA Removal 51 Removing the PS1/PS2 Sensor Assembly PS1 and PS2 Sensor Assembly Removal High Voltage Contact Plate Hvcp and Paper Guide Removal 52 Guide Plate Cover Screw 53 Paper Guide Rollers 54 Cross Member Screws 55 Left Toner Cartridge Guide Plate Screw 56 High Voltage Contact and Feed Guide Assembly Latches 57 Orientation of Hvcp and Left Guide Plate 58 Right Side PC tray Rail Cover printer on right side Interconnect PCA Removal 59 Interconnect PCA latches and AC Connector Mounting Pins 60 Correct Orientation of AC Connector Notch at Upper Left Removal and Replacement Message on LJ 5/5M/5N Recommendations LaserJet 5 Error Map LaserJet 5 Error Map LaserJet 5 Error Map 7-C LaserJet 5 Error Map Preliminary Operating Checks Pre-Troubleshooting Procedures Printer Messages Printer Message TroubleshootingMessage Symptoms and Recommendations Printer Message Summary Table Returns all printer settings to Printing Menu settings, This message is displayed when the MIO AUX IO card is For serial/Bi-Tronics parallel configuration, the computer Refer to the Product Family Compatibility Indicates a communications problem between the DC Printer identified an internal service error. If this error An error state. To clear this message, remove Clearable Warnings Meaning Clearable Warning Messages Checks Action Printer Message Troubleshooting ProceduresBlank Display Blank Display MP/PC/LC Tray 1/2/3 Load Message Figures 7-14 and 7-15 for locations MP/PC/LC Tray 1/2/3 Load Message Checks PC Tray Size Sensing Microswitches Location Cassette Size Switches SW603, SW604, SW605 Functional Check Paper Size Sensing Lower Cassette Switch Logic for Cassette Size PS4 Check MP Tray Empty Sensor PC Empty Sensor PS2 Functional Check Printer Open Checks Printer Open Message Location of the Top Cover Closed SW601 Actuator SW601 Functional Check PS1 and PS3 Paper Path Sensors & PS5 Paper End Sensor Paper JAM Message Jam Location Checks and Action Required Paper Jam Troubleshooting Checklist PS1 Input/Registration Sensor PS1 Input/Registration Sensor Check Pickup Motor Functional Test M2 PS3 Exit Sensor Check Lower Cassette Functional Check Toner Low Message No EP Cart Message Toner Cartridge Components Callout Assembly Error Message Error Message Recommended Action Error Checks Service Error Fuser Malfunction Service Fuser Malfunction Checks 1151 Error Beam Detect Checks Fuser Assembly Connector Laser/Scanner Assembly Functional Checks Error Scanner Malfunction Main Motor Functional Checks 57 or 57.1 Service Message Main Motor Failure 58 or 57.2 Service Fan Failure Image Defect Summary Image Defect Summary Image Defect Summary Any Faint Print Condition Black PagesPossible Cause Action Faulty Registration Vertical White Streaks Right-Hand Image MissingSmall Print Voids Random Horizontal Black Lines Repetitive Defects Distorted Print Smeared Print/Improper Fusing Image Skew 22Black Pages with Horizontal White Strips PS5 Check MP Tray Paper End Sensor Functional Test Improperly Sized Image PS5 Test Sheet Large Print Voids Vertical Dark Streaks Background Scatter LaserJet Family Paper Specifications White or Blank Pages Half Self-Test Functional Check Image Formation Troubleshooting Drum Rotation Functional Check 29High Voltage System Checks High Voltage Power Supply Assembly Test Message Interface TroubleshootingCommunications Check Serial MS-DOS Commands AUTOEXEC.BAT Standard ConfigurationsParallel DOS Commands Communications Checks Communications Checks HP LaserJet printers are not designed to work Troubleshooting Hints MIO Troubleshooting Explanation of Self Test Printout 10 MIO Staus Information on the Self Test Printout Component Locations Troubleshooting Aids 12 Major Assembly and Connector Locations 2 Number Part 13 Major Assembly and Connector Locations 3 Number Switch Locations 15 Optional 500 Sheet Lower Cassette Number Part 16 DC Controller PCA Layout-LaserJet 4/4M Number Part 17 DC Controller PCA Layout -LaserJet 4 Plus/5 Number Part Number Part High Voltage PCA Layout 19 Repetitive Defect Ruler Repetitive Defect Template 20 Main Wiring Diagram LJ 4+/5 only Color Pin Number Voltage Test PointsMeasuring the DC Voltage Levels TB 201Voltages Troubleshooting How To Use the Parts Lists Parts and Diagrams 1a Field-Replaceable Assemblies 1 Parts Lists and Illustrations 1b Field-Replaceable Assemblies 2 Exchng # Description Field-Replaceable Assemblies Field-Replaceable Assemblies Covers and Panels Covers and Panels 3a Top Cover Assembly for LaserJet 4/4+ Top Cover Assembly Cable, Display Panel 3b Top Cover Assembly for LaserJet Overlay Language 4aInternal Components Section 4a Internal Components 1 RB1-2111-030CN Shutter, arm RB1-2114-000CN 4b Internal Components 2 Lnternal Components Section 4c Internal Components 3 Internal Components Section C2038-60004 LJ4+ C3919-67901 4d Internal Components 4 RB1-2251-000CN Block, Connecting RG5-0521-000CN Main Switch Assembly Main Switch Assembly 6a Paper Feed Assembly 1 6b Paper Feed Assembly 2 Paper Feed Assembly MP Tray Tray 1 Assembly MP Tray Tray 1 Assembly Paper Output Assembly Paper Output Assembly Delivery Sensor Assembly Delivery Sensor Assembly 10 Fuser Assembly Fuser Assembly RS5-0232-000CN 11 Lower Cassette Base Assembly Accessory Parts Lower Cassette Base Assembly Lower Cassette Drive Assembly Lower Cassette Drive Assembly 13Lower Cassette Assembly 13 Lower Cassette Assembly 14 Universal Cassette Simm Modules Universal CassetteSimm Memory Miscellaneous Parts and Accessories Miscellaneous Parts and Accessories Alphanumeric Parts List Parts List PCA Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams C2084C +/5 Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Parts and Diagrams Duplexer Figure A-1 Duplexer Paper Path Holding Tray Switchback AssemblyDuplex Printing Figure A-2 Duplexer Major Components Electrical Overview Figure A-3 Electrical Block Diagram LJ 4 + Installing the Optional Duplexer Figure A-4 Duplexer Installation/Removal R n i n g U t i o n Removal and ReplacementRequired Tools Removing the Covers Removing the Switchback Covers Figure A-6 Removing the Side Cover on Power Side Figure A-7 Side Cover on Gear Side Removing the Side Cover on Gear Side Figure A-8 Latch Location on Underside of Duplexer Removing the Front Cover Removing the Back Cover Removing the Fan/Motor/Solenoid/Sensor Removing Internal Duplexer Components Figure A-11 Switchback Paper Guide Removing the Switchback Paper Guide Figure A-12 Wire Routing and Upper Switchback Guide Screw Removing the Paper Guide Assembly Figure A-13 Solenoid Arm Removing the Paper Roller Figure A-14 Upper Paper Guide Sheet Metal Figure A-15 Gears on Paper Roller Figure A-16 Removing the Control PCA Figure A-17 Control PCA Figure A-18 Power PCA Removing the Power PCA Removing the Holding Tray Center Paper Guide Figure A-19 Plate on Power PCA Side of Duplexer Figure A-20 Holding Tray Belt Cover Plate Removing the Holding Tray Belt Figure A-21 Holding Tray Gears and Belt Figure A-22 Holding Tray Paper Sensor Removing the Holding Tray Paper Sensor Figure A-23 Switchback Assembly Hinge Pins Removing the Switchback Assembly Parts and Diagrams for the Duplexer Figure A-24 Duplex External Covers Table A-24 Duplex External Covers Description Figure A-25a Duplex Feeder Assembly 1 Figure A-25b Duplex Feeder Assembly 2 Table A-25 Duplex Feed Assembly Description RF1-3817-00017 Figure A-26a Duplex Switchback Assembly 1 Figure A-26b Duplex Switchback Assembly 2 Table A-26 Duplex Switchback Assembly Description Description LaserJet 5/5M/5N Printer Table B-1 Product Information HP LJ4M+ HPLJ5 HPLJ5M HPLJ5N LaserJet 4? LaserJet 4 Plus? LaserJet 5? Table B-2 LaserJet 5/5M/5N Printer B-5 Table B-4 Table B-3Printer DimensionsHP LaserJet 5 / 5M / 5N Table B-5 Table B-6 HP LaserJet 5/5M/5N Part Number Documents-Description Table B-7 Laser Statement Sweden/Finland Control Panel Keys Control Panel Layout Printer back on line Table B-8 Control Panel Keys Explanation Value + Key Explanation To change a control panel setting Figure B-3 Control Panel Menu Map TableB-10 Printing Menu Items Printing Menu Media size Table B-11 PCL Fonts Menu Items PCL Fonts Menu Table B-13 Job Menu Items PostScript MenuJob Menu Table B-12 PostScript Menu Items Table B-14 Configuration Menu Items Configuration Menu Auto OFF Table B-15 Memory Configuration Menu Items Memory Configuration Menu Table B-17 Serial Menu Items Serial MenuTable B-16 Parallel Menu Items Table B-18 Resets Menu Items Resets Menu Table B-19 Test Menu Items Test Menu LaserJet 5/5M/5N Printer B-25 Service Mode Setting the Cold Reset Default Big Data DiagnosticsSkip Demo Programming a Flash Simm Changing the Control Panel Display Language Nvram Init Table B-20 Self Test Printout Items for the HP LaserJet Figure B-4 HP LaserJet 5 PCL Self Test Printout Infrared Communication System Requirements Figure B-5 IR Data Flow Figure B-6 IrDA Port Location To Print Using the Infrared Port Figure B-7 IrDa Port Ranges Troubleshooting IR Printing Problems Figure B-8 Infrared Test Tool Page Infrared Port Not Responding Table B-21 Solutions for Infrared Not Responding Situation Situation Solution Index-1 Index Index-2 Index-3 Index-4 Index-5 Index-6 Index-7 Index-8 SN-1 Service Notes SN-2 Service Notes SN-3 Service Notes SN-4 Service Notes SN-5 Service Notes SN-6 Service Notes SN-7 Service Notes SN-8 Service Notes C3916-90984

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