HP LaserJet 4050 Series Manuals

Manuals and User Guides for HP LaserJet 4050 Series. We have 3 HP LaserJet 4050 Series manuals available for free PDF download: Service Manual

HP LaserJet 4050 Series Service Manual

HP LaserJet 4050 Series Service Manual (394 pages)

Hewlett-Packard Printers Service Manual  
Brand: HP | Category: Printer | Size: 4.61 MB
Table of contents
Table Of Contents5................................................................................................................................................................
Printer Description11................................................................................................................................................................
Overview11................................................................................................................................................................
Printer Features12................................................................................................................................................................
Identification18................................................................................................................................................................
Model And Serial Numbers18................................................................................................................................................................
Site Requirements19................................................................................................................................................................
Space Requirements20................................................................................................................................................................
Environmental Requirements21................................................................................................................................................................
Paper Specifications22................................................................................................................................................................
Supported Types Of Paper25................................................................................................................................................................
Guidelines For Using Paper26................................................................................................................................................................
Paper Weight Equivalence Table28................................................................................................................................................................
Labels29................................................................................................................................................................
Transparencies29................................................................................................................................................................
Envelopes30................................................................................................................................................................
Envelopes With Double Side Seams31................................................................................................................................................................
Envelopes With Adhesive Strips Or Flaps31................................................................................................................................................................
Envelope Margins32................................................................................................................................................................
Envelope Storage32................................................................................................................................................................
Card Stock And Heavy Paper33................................................................................................................................................................
Safety Information34................................................................................................................................................................
Laser Safety Statement34................................................................................................................................................................
Canadian Doc Regulations34................................................................................................................................................................
Fcc Regulations35................................................................................................................................................................
Laser Statement For Finland36................................................................................................................................................................
Toner Safety37................................................................................................................................................................
Environmental Product Stewardship38................................................................................................................................................................
Service Approach39................................................................................................................................................................
Parts And Supplies41................................................................................................................................................................
Ordering Information41................................................................................................................................................................
Helpful Documentation42................................................................................................................................................................
Phone Numbers For Ordering44................................................................................................................................................................
Exchange Program44................................................................................................................................................................
Consumables44................................................................................................................................................................
World Wide Web44................................................................................................................................................................
Hp Service Parts Information Compact Disc44................................................................................................................................................................
Hp Support Assistant Compact Disc45................................................................................................................................................................
Hp First45................................................................................................................................................................
Customer Care Reseller Sales And Service Support Center46................................................................................................................................................................
Toner Cartridge Information47................................................................................................................................................................
Recycling Toner Cartridges47................................................................................................................................................................
Warranty Statement48................................................................................................................................................................
Printer Operation49................................................................................................................................................................
Using The Control Panel50................................................................................................................................................................
Control Panel Layout50................................................................................................................................................................
Control Panel Lights50................................................................................................................................................................
Control Panel Keys51................................................................................................................................................................
Settings And Defaults52................................................................................................................................................................
Control Panel Menus53................................................................................................................................................................
Quick Copy Jobs Menu54................................................................................................................................................................
Private/stored Jobs Menu55................................................................................................................................................................
Information Menu56................................................................................................................................................................
Paper Handling Menu57................................................................................................................................................................
Print Quality Menu60................................................................................................................................................................
Printing Menu63................................................................................................................................................................
Configuration Menu68................................................................................................................................................................
I/o Menu74................................................................................................................................................................
Eio Menu (networked Printers)77................................................................................................................................................................
Resets Menu79................................................................................................................................................................
Service Mode80................................................................................................................................................................
Service Menu81................................................................................................................................................................
Setting The Page Count, Maintenance Count, And Serial Number81................................................................................................................................................................
Page Count82................................................................................................................................................................
Maintenance Page Count83................................................................................................................................................................
Cold Reset Paper84................................................................................................................................................................
Diagnostics84................................................................................................................................................................
Clear Event Log84................................................................................................................................................................
Testing The Printer85................................................................................................................................................................
Cold Reset86................................................................................................................................................................
Clearing Nvram86................................................................................................................................................................
Resetting The Printer86................................................................................................................................................................
System Configuration87................................................................................................................................................................
Ms-dos System Configuration87................................................................................................................................................................
Parallel Dos Commands87................................................................................................................................................................
Serial Ms-dos Commands88................................................................................................................................................................
Printer I/o Configuration89................................................................................................................................................................
Parallel Menu89................................................................................................................................................................
Serial Configuration89................................................................................................................................................................
Printer Maintenance91................................................................................................................................................................
Cleaning The Printer And Accessories92................................................................................................................................................................
Cleaning Spilled Toner94................................................................................................................................................................
Preventative Maintenance95................................................................................................................................................................
Reset Maintenance Count95................................................................................................................................................................
Expected Life Of Components96................................................................................................................................................................
Functional Information97................................................................................................................................................................
Power Supply System98................................................................................................................................................................
Ac/dc Power Distribution98................................................................................................................................................................
Overcurrent Overvoltage Protection99................................................................................................................................................................
High-voltage Power Distribution100................................................................................................................................................................
Toner Cartridge Detection101................................................................................................................................................................
Engine Controller System102................................................................................................................................................................
Engine Controller Board Inputs And Outputs104................................................................................................................................................................
Laser And Scanner Drive108................................................................................................................................................................
Paper Motion Monitoring And Control108................................................................................................................................................................
Solenoids, Sensors, Clutches, And Switches108................................................................................................................................................................
Engine Test Print108................................................................................................................................................................
Motors109................................................................................................................................................................
Formatter System111................................................................................................................................................................
Powersave111................................................................................................................................................................
Resolution Enhancement Technology (ret)112................................................................................................................................................................
Economode112................................................................................................................................................................
Input/output113................................................................................................................................................................
Cpu114................................................................................................................................................................
Printer Memory114................................................................................................................................................................
Random Access Memory (ram)115................................................................................................................................................................
Dimm Slots115................................................................................................................................................................
Page Protect116................................................................................................................................................................
Pjl Overview116................................................................................................................................................................
Pml117................................................................................................................................................................
Control Panel117................................................................................................................................................................
Image Formation System118................................................................................................................................................................
Toner Cartridge120................................................................................................................................................................
Photosensitive Drum121................................................................................................................................................................
Cleaning The Drum122................................................................................................................................................................
Writing The Image124................................................................................................................................................................
Developing The Image125................................................................................................................................................................
Transferring The Image126................................................................................................................................................................
Image Fusing/variable Fusing Temperature127................................................................................................................................................................
Variable Fusing Temperature128................................................................................................................................................................
Paper Feed System129................................................................................................................................................................
Clutches And Sensors131................................................................................................................................................................
Printing From Tray 1132................................................................................................................................................................
Printing From Tray 2134................................................................................................................................................................
Printing From The Optional 500-sheet Universal Tray137................................................................................................................................................................
Envelope Feeder140................................................................................................................................................................
Duplexer142................................................................................................................................................................
Paper Jam144................................................................................................................................................................
Basic Sequence Of Operation145................................................................................................................................................................
Removing And Replacing Parts147................................................................................................................................................................
Removal And Replacement Strategy148................................................................................................................................................................
Tools149................................................................................................................................................................
Removing Covers152................................................................................................................................................................
Rear Right Side Cover152................................................................................................................................................................
Top Cover153................................................................................................................................................................
Left Side Cover158................................................................................................................................................................
Front Right Side Cover159................................................................................................................................................................
Rear Cover/rear Output Bin160................................................................................................................................................................
Tray 1161................................................................................................................................................................
Removing Assemblies164................................................................................................................................................................
Fuser164................................................................................................................................................................
Formatter Cage Assembly166................................................................................................................................................................
Output Assembly167................................................................................................................................................................
Laser Scanner169................................................................................................................................................................
Fan170................................................................................................................................................................
Main Motor171................................................................................................................................................................
Transfer Roller172................................................................................................................................................................
Tray 1 Pickup Roller173................................................................................................................................................................
Tray 1 Pickup Assembly175................................................................................................................................................................
Right Side Toner Cartridge Guide179................................................................................................................................................................
Registration Assembly180................................................................................................................................................................
Paper Feed Assembly182................................................................................................................................................................
Formatter Pan185................................................................................................................................................................
Gear Train186................................................................................................................................................................
Delivery Drive Assembly187................................................................................................................................................................
Separating The Engine Module From The Paper Feed Module188................................................................................................................................................................
Engine Controller Board190................................................................................................................................................................
Adjusting The Top Margin192................................................................................................................................................................
Paper Feed Rollers194................................................................................................................................................................
Separation Rollers195................................................................................................................................................................
Paper Feed Module Plate196................................................................................................................................................................
Paper Feed Module Gear Train Assembly197................................................................................................................................................................
Paper Feed Module Side Rails198................................................................................................................................................................
Lower Paper Feed Module Plate (hp Laserjet 4000 T/4000 Tn And 4050 T/4050 Tn)199................................................................................................................................................................
Pca Cover (hp Laserjet 4000 T/4000 Tn And 4050 T/4050 Tn)200................................................................................................................................................................
Pca Cover (hp Laserjet 4000/4000 N And 4050/4050 N)201................................................................................................................................................................
Pca Controller202................................................................................................................................................................
Troubleshooting203................................................................................................................................................................
Troubleshooting Process204................................................................................................................................................................
Troubleshooting Flowchart206................................................................................................................................................................
Troubleshooting Flowchart (continued)207................................................................................................................................................................
Troubleshooting The Printing System208................................................................................................................................................................
Preliminary Operating Checks208................................................................................................................................................................
Power On209................................................................................................................................................................
Engine Test213................................................................................................................................................................
Display214................................................................................................................................................................
Event Log215................................................................................................................................................................
Display The Event Log217................................................................................................................................................................
Print The Event Log217................................................................................................................................................................
Interpret The Event Log218................................................................................................................................................................
Printer Messages219................................................................................................................................................................
General Paper Path Troubleshooting247................................................................................................................................................................
Paper Path Test249................................................................................................................................................................
Information Pages250................................................................................................................................................................
Configuration Page253................................................................................................................................................................
Image Quality256................................................................................................................................................................
Check The Toner Cartridge257................................................................................................................................................................
Image Defects259................................................................................................................................................................
Repetitive Defect Ruler275................................................................................................................................................................
Image System Troubleshooting276................................................................................................................................................................
Drum Rotation Functional Check277................................................................................................................................................................
Interface Troubleshooting279................................................................................................................................................................
Hp Jetdirect Configuration282................................................................................................................................................................
Autoexec.bat Standard Configurations283................................................................................................................................................................
Communications Checks284................................................................................................................................................................
Reference Diagrams286................................................................................................................................................................
Locations Of Components286................................................................................................................................................................
Paper Path292................................................................................................................................................................
Paper Size Detection Switches296................................................................................................................................................................
Connectors299................................................................................................................................................................
Pcas302................................................................................................................................................................
Sensors And Thermistor304................................................................................................................................................................
Solenoids And Clutch307................................................................................................................................................................
Switches310................................................................................................................................................................
Timing312................................................................................................................................................................
Parts And Diagrams313................................................................................................................................................................
How To Use The Parts Lists And Diagrams314................................................................................................................................................................
Accessories And Supplies316................................................................................................................................................................
Common Screws And Replacement Cables318................................................................................................................................................................
Illustrations And Parts Lists320................................................................................................................................................................
Alphabetical Parts List370................................................................................................................................................................
Numerical Parts List379................................................................................................................................................................

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HP LaserJet 4050 Series Service Manual

HP LaserJet 4050 Series Service Manual (394 pages)

Brand: HP | Category: Printer | Size: 5.02 MB
Table of contents
Service Manual1................................................................................................................................................................
Table Of Contents5................................................................................................................................................................
Overview11................................................................................................................................................................
Printer Features12................................................................................................................................................................
Identification18................................................................................................................................................................
Site Requirements19................................................................................................................................................................
Space Requirements20................................................................................................................................................................
Environmental Requirements21................................................................................................................................................................
Paper Specifications22................................................................................................................................................................
Supported Types Of Paper25................................................................................................................................................................
Guidelines For Using Paper26................................................................................................................................................................
Paper Weight Equivalence Table28................................................................................................................................................................
Labels29................................................................................................................................................................
Envelopes30................................................................................................................................................................
Envelopes With Double Side Seams31................................................................................................................................................................
Envelopes With Adhesive Strips Or Flaps31................................................................................................................................................................
Envelope Margins32................................................................................................................................................................
Envelope Storage32................................................................................................................................................................
Card Stock And Heavy Paper33................................................................................................................................................................
Safety Information34................................................................................................................................................................
Fcc Regulations35................................................................................................................................................................
Laser Statement For Finland36................................................................................................................................................................
Toner Safety37................................................................................................................................................................
Environmental Product Stewardship38................................................................................................................................................................
Service Approach40................................................................................................................................................................
Parts And Supplies41................................................................................................................................................................
Ordering Information41................................................................................................................................................................
Helpful Documentation42................................................................................................................................................................
Phone Numbers For Ordering44................................................................................................................................................................
Hp Support Assistant Compact Disc45................................................................................................................................................................
Customer Care Reseller Sales And Service Support Center46................................................................................................................................................................
Toner Cartridge Information47................................................................................................................................................................
Recycling Toner Cartridges47................................................................................................................................................................
Warranty Statement48................................................................................................................................................................
Using The Control Panel50................................................................................................................................................................
Control Panel Keys51................................................................................................................................................................
Settings And Defaults52................................................................................................................................................................
Control Panel Menus53................................................................................................................................................................
Quick Copy Jobs Menu54................................................................................................................................................................
Private/stored Jobs Menu55................................................................................................................................................................
Information Menu56................................................................................................................................................................
Paper Handling Menu57................................................................................................................................................................
Print Quality Menu60................................................................................................................................................................
Printing Menu63................................................................................................................................................................
Configuration Menu68................................................................................................................................................................
I/o Menu74................................................................................................................................................................
Eio Menu (networked Printers)77................................................................................................................................................................
Resets Menu79................................................................................................................................................................
Service Mode80................................................................................................................................................................
Service Menu81................................................................................................................................................................
Page Count82................................................................................................................................................................
Maintenance Page Count83................................................................................................................................................................
Cold Reset Paper84................................................................................................................................................................
Serial Number84................................................................................................................................................................
Testing The Printer85................................................................................................................................................................
Resetting The Printer86................................................................................................................................................................
Cold Reset86................................................................................................................................................................
Clearing Nvram86................................................................................................................................................................
System Configuration87................................................................................................................................................................
Serial Ms-dos Commands88................................................................................................................................................................
Printer I/o Configuration89................................................................................................................................................................
Cleaning The Printer And Accessories92................................................................................................................................................................
Cleaning Spilled Toner94................................................................................................................................................................
Preventative Maintenance95................................................................................................................................................................
Expected Life Of Components96................................................................................................................................................................
Power Supply System98................................................................................................................................................................
Overcurrent Overvoltage Protection99................................................................................................................................................................
High-voltage Power Distribution100................................................................................................................................................................
Toner Cartridge Detection101................................................................................................................................................................
Engine Controller System102................................................................................................................................................................
Engine Controller Board Inputs And Outputs104................................................................................................................................................................
Laser And Scanner Drive108................................................................................................................................................................
Motors109................................................................................................................................................................
Formatter System111................................................................................................................................................................
Resolution Enhancement Technology (ret)112................................................................................................................................................................
Input/output113................................................................................................................................................................
Printer Memory114................................................................................................................................................................
Random Access Memory (ram)115................................................................................................................................................................
Memory Enhancement Technology (met)115................................................................................................................................................................
Page Protect116................................................................................................................................................................
Control Panel117................................................................................................................................................................
Image Formation System118................................................................................................................................................................
Toner Cartridge120................................................................................................................................................................
Photosensitive Drum121................................................................................................................................................................
Cleaning The Drum122................................................................................................................................................................
Writing The Image124................................................................................................................................................................
Developing The Image125................................................................................................................................................................
Transferring The Image126................................................................................................................................................................
Image Fusing/variable Fusing Temperature127................................................................................................................................................................
Variable Fusing Temperature128................................................................................................................................................................
Paper Feed System129................................................................................................................................................................
Clutches And Sensors131................................................................................................................................................................
Printing From Tray 1132................................................................................................................................................................
Printing From Tray 2134................................................................................................................................................................
Universal Tray137................................................................................................................................................................
Envelope Feeder140................................................................................................................................................................
Duplexer142................................................................................................................................................................
Paper Jam144................................................................................................................................................................
Basic Sequence Of Operation145................................................................................................................................................................
Removal And Replacement Strategy148................................................................................................................................................................
Tools149................................................................................................................................................................
Removing Covers152................................................................................................................................................................
Top Cover153................................................................................................................................................................
Left Side Cover158................................................................................................................................................................
Front Right Side Cover159................................................................................................................................................................
Rear Cover/rear Output Bin160................................................................................................................................................................
Tray161................................................................................................................................................................
Removing Assemblies164................................................................................................................................................................
Formatter Cage Assembly166................................................................................................................................................................
Output Assembly167................................................................................................................................................................
Laser Scanner169................................................................................................................................................................
Main Motor171................................................................................................................................................................
Transfer Roller172................................................................................................................................................................
Tray 1 Pickup Roller173................................................................................................................................................................
Tray 1 Pickup Assembly175................................................................................................................................................................
Right Side Toner Cartridge Guide179................................................................................................................................................................
Registration Assembly180................................................................................................................................................................
Paper Feed Assembly182................................................................................................................................................................
Formatter Pan185................................................................................................................................................................
Gear Train186................................................................................................................................................................
Delivery Drive Assembly187................................................................................................................................................................
Separating The Engine Module From The Paper Feed Module188................................................................................................................................................................
Engine Controller Board190................................................................................................................................................................
Adjusting The Top Margin192................................................................................................................................................................
Paper Feed Rollers194................................................................................................................................................................
Separation Rollers195................................................................................................................................................................
Paper Feed Module Plate196................................................................................................................................................................
Paper Feed Module Gear Train Assembly197................................................................................................................................................................
Paper Feed Module Side Rails198................................................................................................................................................................
Pca Cover (hp Laserjet 4000/4000 N And 4050/4050 N)201................................................................................................................................................................
Pca Controller202................................................................................................................................................................
Troubleshooting Process204................................................................................................................................................................
Troubleshooting Flowchart206................................................................................................................................................................
Troubleshooting Flowchart (continued)207................................................................................................................................................................
Troubleshooting The Printing System208................................................................................................................................................................
Preliminary Operating Checks208................................................................................................................................................................
Power On209................................................................................................................................................................
Engine Test213................................................................................................................................................................
Display214................................................................................................................................................................
Event Log215................................................................................................................................................................
Display The Event Log217................................................................................................................................................................
Print The Event Log217................................................................................................................................................................
Interpret The Event Log218................................................................................................................................................................
Printer Messages219................................................................................................................................................................
General Paper Path Troubleshooting247................................................................................................................................................................
Paper Path Test249................................................................................................................................................................
Information Pages250................................................................................................................................................................
Configuration Page253................................................................................................................................................................
Image Quality256................................................................................................................................................................
Check The Toner Cartridge257................................................................................................................................................................
Image Defects259................................................................................................................................................................
Repetitive Defect Ruler275................................................................................................................................................................
Image System Troubleshooting276................................................................................................................................................................
Drum Rotation Functional Check277................................................................................................................................................................
Interface Troubleshooting279................................................................................................................................................................
Hp Jetdirect Configuration282................................................................................................................................................................
Autoexec.bat Standard Configurations283................................................................................................................................................................
Communications Checks284................................................................................................................................................................
Reference Diagrams286................................................................................................................................................................
Paper Path292................................................................................................................................................................
Paper Size Detection Switches296................................................................................................................................................................
Connectors299................................................................................................................................................................
Pcas302................................................................................................................................................................
Sensors And Thermistor304................................................................................................................................................................
Solenoids And Clutch307................................................................................................................................................................
Switches310................................................................................................................................................................
Timing312................................................................................................................................................................
How To Use The Parts Lists And Diagrams314................................................................................................................................................................
Accessories And Supplies316................................................................................................................................................................
Common Screws And Replacement Cables318................................................................................................................................................................
Illustrations And Parts Lists320................................................................................................................................................................
Alphabetical Parts List370................................................................................................................................................................
Numerical Parts List379................................................................................................................................................................
HP LaserJet 4050 Series Service Manual

HP LaserJet 4050 Series Service Manual (43 pages)

Brand: HP | Category: Printer | Size: 0.66 MB
Table of contents
About This Guide3................................................................................................................................................................
Quick Reference Parts List4................................................................................................................................................................
Printer Information5................................................................................................................................................................
Paper Jam Related Problems7................................................................................................................................................................
Image Related Problems9................................................................................................................................................................
Setting The Ip Address12................................................................................................................................................................
Replacing The Fuser Film14................................................................................................................................................................
Maintenance Kit Installation Instructions33................................................................................................................................................................
Replacing Tray 2 And 3 Separation Clutch37................................................................................................................................................................
Replacing Tray 1 Separation Pad41................................................................................................................................................................
Reset The Maintenance Count In Service Mode43................................................................................................................................................................

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