7Laser/scanner system | HP P2050 manual

Laser/scanner system

The formatter sends video signals to the DC controller, which controls the laser/scanner. When the laser/ scanner system receives those signals, it converts them to latent images on the photosensitive drum.

Figure 5-7Laser/scanner system

Engine controller

DC controller

SCANNER MOTOR SPEED CONTROL signal

		Formatter
CONTROL signal	VIDEO signal	BD INPUT signal
LASER
		Laser unit

Scanner mirror

BD sensor

Scanner motor unit

Photosensitive drum

88 Chapter 5 Theory of operation

ENWW

Image 100

HP P2050 manual 7Laser/scanner system

Contents

HP LaserJet P2050 and P2030 Series Printers Page Page Copyright and License Trademark Credits Table of contents Control panel Paper and print media Manage and maintain Removal and replacement Theory of operation Solve problems Enww Parts and diagrams Appendix a Service and support Appendix B SpecificationsAppendix C Regulatory information 301 Product basics Product comparison HP LaserJet P2050 Series PrintersHP LaserJet P2055d printer HP LaserJet P2055dn printer CE457A CE459A CE460A HP LaserJet P2035 printer HP LaserJet P2030 Series PrintersCE461A CE462A Product features Feature Description Button, 6 LED control panel Product walkaround Front view Rear view Interface ports Model and serial number label HP LaserJet P2030 Series Printers Rear view 1HP LaserJet P2035 printer Model and serial-number label location Software installation types for Windows Supported product softwareSoftware included with the product Macintosh software HP Web Jetadmin Other software providedSoftware for Windows Software for networks Software for other operating systems Software Windows requirements System minimum requirementsMacintosh requirements Service name Description ConnectivitySupported networks HP LaserJet P2050 Series Printers 2Network product discovery Supported network HP LaserJet P2030 Series Printers 4IP addressing 7Messaging and management 6Network product discovery8IP addressing Product basics Control panel Control-panel layout Control panel HP LaserJet P2050 Series Printers onlyNumber Button or light Function Use the control-panel menus Use the menus Reports menu Menu item Description System setup menu Menu item Sub-menu item Description Control panel Service menu Use this menu to establish network configuration settings WEB Control panel HP LaserJet P2030 Series Printers only Go button and light Paper and print media Size and dimensions Tray Optional 500-sheet Duplexer Supported paper and print mediaPaper for the HP LaserJet P2050 Series Printers Supported paper and print media sizes Supported paper and print media types Tray or bin Paper type Specifications Quantity Paper for the HP LaserJet P2030 Series PrintersTray and bin capacity Recycled Size and dimensions Tray 2Supported paper and print media sizes Paper type printer driver Tray Tray and bin capacity Load trays Load paper and print mediaPaper orientation for loading trays Tray Load A6-size paper Optional Tray 3 HP LaserJet P2050 Series Printers only Manual feed Configure trays HP LaserJet P2050 Series Printers only Configure traysConfigure trays HP LaserJet P2030 Series Printers only Use paper output options Print to the top standard output bin Print to the straight-through paper path rear output Paper and print media Manage and maintain Print the information pages DemoPrint the information pages Name of report Description Configuration Supplies Status View HP ToolboxFX Status Event log Set up Status Alerts Set up E-mail AlertsAlerts Help Device Settings Device Information Paper Handling PrintingPCL5c PostScript Shop for Supplies Network SettingsOther Links Enww Open the embedded Web server Manage a network productStatus tab Use HP Web Jetadmin software Use security features Supplies life Manage suppliesManage the print cartridge Enww Replace supplies and parts Supply replacement guidelinesRedistribute toner Change the print cartridge Enww Install memory HP LaserJet P2050 Series Printers only Install product memory Install memory HP LaserJet P2050 Series Printers only Enww Check Dimm installation Save resources permanent resources Enable memory for Windows Click the Device Settings tab Clean the product Clean the print-cartridge area Clean the paper path HP LaserJet P2050 Series Printers only Clean the paper path HP LaserJet P2030 Series Printers only Clean the Tray 1 pickup roller Settings tab Enww Enww Enww Clean the Tray 2 pickup roller Enww Reconnect the power cord, and turn the product on Manage and maintain Theory of operation 1Block diagram Introduction Internal components 2Cross-section of product Enww 1Sequence of operation TimingName Timing Purpose Engine control system 3Engine control system DC controller 4DC controller Low-voltage power supply Swon High-voltage power supply 6High-voltage power supply Laser/scanner system 7Laser/scanner system Laser failure detection Image-formation system Primary charging 10 Developing 11 Transfer 13 Fusing Pickup/feed/delivery system Pickup/feed/delivery system Jam detection 16Jam detection Enww Removal and replacement Removal and replacement strategy Electrostatic discharge Required tools 1Phillips and pozidrive screwdriver comparison Before performing service After performing service Post-service test Print-quality test Print cartridge Tray 2 cassette 3Remove the Tray 2 cassette Rollers and pads Pickup roller Tray Release two tabs 8Remove the pickup roller Tray 1 5 Removal and replacement Pickup roller assembly Tray 9Remove the pickup roller assembly Tray 2 1 Enww 13Remove the pickup roller Tray 2 5 Separation-pad assembly Tray 14Remove the separation-pad assembly Tray 2 1 Transfer roller 19Remove the transfer roller 4 Removal and replacement 20Remove the transfer roller 5 External panels, covers, and doors Dimm door HP LaserJet P2050 Series only Right cover 26Remove the right cover 4 Removal and replacement Reinstall the right cover Left cover Enww Rear cover, rear door, and duplex-paper-feed assembly Remove five screws callout Enww Enww Top-cover assembly Enww Remove three screws callout Cartridge-door assembly and front cover 44Remove the cartridge door assembly and front cover 2 Carefully remove the cartridge-door assembly Reinstall the cartridge-door assembly and front cover Internal assemblies Formatter PCA HP LaserJet P2030 Series Internal assemblies Formatter PCA HP LaserJet P2050 Series Enww Paper-pickup-gear assembly Reinstall the paper-pickup-gear assembly 55Remove the paper-pickup-gear assembly 3 Enww Cartridge-door switch Tray 1 pickup solenoid Enww Fan 65Remove the fan 3 Reverse-sensor assembly HP LaserJet P2050 Series Remove the reverse-sensor assembly Power-switch assembly 68Remove the power-switch assembly 1 Removal and replacement 70Remove the power-switch assembly 3 71Remove the power-switch assembly 4 Removal and replacement Connecting PCA 72Remove the connecting PCA 1 Enww 75Remove the connecting PCA 4 Inlet-cable assembly 76Remove the inlet-cable assembly 1 Removal and replacement 78Remove the inlet-cable assembly 3 Registration assembly Top cover assembly. See Top-cover assembly on 80Remove the registration assembly 2 Remove the guide Enww 85Remove the registration assembly 7 Laser/scanner assembly 87Remove the laser/scanner assembly 2 88Remove the fuser 1 Removal and replacement Fuser Enww Enww 94Remove the fuser 7 Reinstall the fuser Engine controller unit ECU Enww 101Remove the ECU 5 Enww Enww 107Remove the ECU 11 Removal and replacement 109Remove the ECU 13 Reinstall the ECU 111Reinstall the fuser 1 Removal and replacement Enww Paper-feed-guide assembly 114Remove the paper-feed-guide assembly 2 Main motor 117Remove the main motor 3 118Remove the main motor 4 Face-down-drive or duplexing-paper-feed assembly Remove the fan duct Remove the face-down-drive or duplexing-paper-feed assembly Duplex solenoid HP LaserJet P2050 Series Paper-retaining-delivery assembly 125Remove the paper-retaining-delivery assembly 1 Enww Enww Remove the paper-retaining-delivery assembly Solve problems Solve general problems Troubleshooting checklist Factors that affect product performance 1Basic problem solving Basic problem solvingProblem Cause Solution Engine components Engine test page on Menu map HP LaserJet P2050 Series Printers only Print a menu map Pre-troubleshooting checklist Troubleshooting processGeneral topic Questions For 10 to 20 minutes Tools for troubleshooting Continuous self-test HP LaserJet P2050 Series onlyHalf self-test functional check Drum rotation functional check High-voltage contacts check Heating element checkChecking the print cartridge contacts 1High-voltage contact points on the print cartridge 2Left-side components Component locationsReference Component Description If disconnected or blocked 3Right-side components FM1 4Connector PCA components Reference Component Description 5Rear-side components 6Print cartridge componentsOutput bin appears Cartridge area appears 7Top components Bin full appears 8Tray 1 and Tray 2 components Problem-solve diagrams Repetitive image defect ruler9Repetitive defects Component Distance between defects Description When disconnected 10Engine controller connectorsEngine controller PCA Control-panel messageLoad paper appears Supply memory error appearsOpen door and clear jam appear Major components 11Major components PCAs 12 PCAs Timing chart ChartGeneral Circuit diagram Circuit diagram 14Control-panel light messages 13Status-light legendLight status State of the product Action Processing Data Manual Feed or Continuable Error Toner Low Toner Missing Jam Paper Mount Supply memory error Fuser errorScanner Error Alert message Description Recommended action Engine communication error Install black cartridgeDoor Open Jam in cartridge area Jam in output bin Jam in Tray Non-HP supply installed Load paperManual feed No paper pickup Engine error Control-panel messagesPrint failure Press OK Error 41.X.ErrorTurn off then on Turn off then on Laser/scanner assembly error XX Error 51.0000Fan error Service error Device errorGenuine HP supply installed Press OK Door open Specifications Cleaning mode OK to start Load paperLoad tray # Type Size Press OK for available media Load tray 1 Type Size Manual duplexLoad tray Manual feed Type Size Used cartridge in use Used cartridge installedTo accept press OK Event-log messages Print the event log HP LaserJet P2050 Series Printers onlyPrint an event log HP LaserJet P2030 Series Printers only Event log messages Solve problems Paper-handling problems Product is jammed.1 Cause SolutionJams Common causes of jams Clear jams Jam locationsInternal areas Print-cartridge area and paper path Enww Duplex paper path HP LaserJet P2050 Series Printers only Enww Enww Input trays Tray Tray Enww Tray 3 HP LaserJet P2050 Series Printers only Output bins Enww Printed page is different from what appeared onscreen Solve image-quality problems16Printed page is different from what appeared onscreen Image defect examples Light print or faded Toner specks DropoutsVertical lines Gray background Toner smear Loose tonerVertical repetitive defects Misformed characters Curl or wave SkewWrinkles or creases Toner scatter outline Solve print-quality problems Print-quality problems associated with paperPrint-quality problems associated with the environment Print-quality problems associated with jams Solve performance problems Solve direct-connect problems Solve connectivity problemsSolve network problems Service mode functions Open the secondary service menuSecondary service menu structure 17Secondary Service menu Engine resets Restore defaultsEngine test Nvram initialization HP LaserJet P2050 Series Printers only Solve problems Parts and diagrams Order parts, accessories, and supplies Paper-handling accessories Part numbersPrint cartridges Memory Whole unit replacement Product Model Voltage Description Part number 1Common fasteners ScrewsExample Description Size Part Number How to use the parts lists and diagrams How to use the parts lists and diagrams External covers, panels, and doors HP LaserJet P2035 2External covers, panels, and doors HP LaserJet P2035 Description Part number Qty HP LaserJet P2055 3External covers, panels, and doors HP LaserJet P2055 Internal components 1 Hplj 2050 Series only 4Internal components 1 Internal components 2 4Internal components 2 5Internal components 2 Internal components 3 Hplj 2030 Series only Hplj 2050 Series only 6Internal components 3 Internal components 4 6Internal components 4 7Internal components 4 Internal components 5 7Internal components 5 8Internal components 5 Alphabetical parts list 9Alphabetical parts list Internal components 1 Switch, push SW301 cartridge-door interlock WC4-5171-000CN 10Numerical parts list Numerical parts listPart number Description External covers, panels, and doors HP LaserJet P2035 on RM1-6445-000CN Reverse-sensor assembly HP LaserJet P2055 Parts and diagrams Service and support Hewlett-Packard limited warranty statement Print cartridge limited warranty statement End User License Agreement Transfer End User License Agreement Customer self-repair warranty service Customer support Ljp2030series HP maintenance agreements On-site service agreementsNext-day on-site service Weekly volume on-site service Extended warranty Appendix a Service and support Specifications Physical specifications Electrical specificationsTable B-1Product dimensions and weights Table B-3Product dimensions and weights Acoustic emissions Operating environment Appendix B Specifications Regulatory information FCC regulations Declaration of conformity Declaration of conformityDeclaration of Conformity Laser safety Safety statementsCanadian DOC regulations Laser statement for Finland Luokan 1 laserlaite Substances Table China Symbols/Numerics Cables Dimm See also solving Macintosh PCL Enww Enww TCP/IP Enww Page CE457-90980* *CE457-90980