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hp color LaserJet 2550 printer
service
hp color LaserJet 2550 series printer
Service Manual
Copyright information © 2004 Copyright Hewlett-Packard Development Company, L.P. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The information contained herein is subject to change without notice. The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein. Part number Q3702-90923 Edition 1, 5/2004
Safety information WARNING! Potential Shock Hazard Always follow basic safety precautions when using this product to reduce risk of injury from fire or electric shock. Read and understand all instructions in the user guide. Observe all warnings and instructions marked on the product. Use only a grounded electrical outlet when connecting the printer to a power source. If you do not know whether the outlet is grounded, check with a qualified electrician. Do not touch the contacts on the end of any of the sockets on the printer. Replace damaged cords immediately. Unplug this product from wall outlets before cleaning. Do not install or use this product near water or when you are wet. Install the product securely on a stable surface. Install the product in a protected location where no one can step on or trip over the power cord and where the power cord will not be damaged. If the product does not operate normally, see the online user guide. Refer all servicing questions to qualified personnel. Information regarding FCC Class B, Parts 15 and 68 requirements can be found in the user guide.
Trademark credits Adobe®, Acrobat®, Adobe® PostScript® 3TM, and the Acrobat Logo® are trademarks of Adobe Systems Incorporated. Microsoft®, Windows®, and Windows NT® are U.S. registered trademarks of Microsoft Corporation. UNIX® is a registered trademark of The Open Group. Energy Star® and the Energy Star logo® are U.S. registered marks of the United States Environmental Protection Agency.
Table of contents
1 Product information
Chapter contents ....................................................................................................................... 1 Printer configurations ................................................................................................................2 HP color LaserJet 2550L ....................................................................................................2 HP color LaserJet 2550Ln ..................................................................................................2 HP color LaserJet 2550n ....................................................................................................3 Printer features ..........................................................................................................................4 Printer overview..........................................................................................................................7 Hardware components........................................................................................................7 Model and serial numbers ..................................................................................................7 Software components ...............................................................................................................9 Software and supported operating systems .......................................................................9 Software tips ..................................................................................................................... 0 1 Software for Windows .......................................................................................................11 Software for Macintosh ..................................................................................................... 2 1 Uninstalling the printing software .....................................................................................13 Specifications ..........................................................................................................................15 Media specifications ................................................................................................................ 7 1 Supported media weights and sizes .................................................................................17 General guidelines ............................................................................................................18 Paper and print media ......................................................................................................19 Printing and storage environment ....................................................................................19 Envelopes ......................................................................................................................... 0 2 Labels ...............................................................................................................................21 Transparencies ................................................................................................................. 2 2 Hewlett-Packard limited warranty statement ..........................................................................23 Limited warranty for the print cartridges and imaging drum ...................................................24 Print cartridge information ....................................................................................................... 5 2 Refilled print cartridges ..................................................................................................... 5 2 HP LaserJet printing supplies ..........................................................................................25 HP Printing Supplies Returns and Recycling Program information..................................25 Regulatory statements ............................................................................................................27 Safety statements ...................................................................................................................28 Laser safety statement .....................................................................................................28 Canadian DOC statement ................................................................................................28 Korean EMI statement ...................................................................................................... 8 2 Finnish laser statement ....................................................................................................29
2 Installation and operation
Chapter contents ..................................................................................................................... 1 3 Operating environment ............................................................................................................32 Interface ports .........................................................................................................................33 Control panel features .............................................................................................................34 Understanding Supplies Status ........................................................................................34 Understanding Printer Status ...........................................................................................35
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Input trays ................................................................................................................................37 Printer output paths ................................................................................................................. 8 3 Top output bin ...................................................................................................................38 Rear output door ...............................................................................................................38 Loading media .........................................................................................................................39 Loading tray 1 ................................................................................................................... 9 3 Loading optional tray 2 .....................................................................................................40 Loading optional tray 3 .....................................................................................................42 HP LaserJet Toolbox ...............................................................................................................44 Supported operating systems ...........................................................................................44 Supported browsers .........................................................................................................44 Viewing the HP LaserJet Toolbox ...................................................................................45 Status tab ..........................................................................................................................45 Troubleshooting tab .......................................................................................................... 5 4 Alerts tab ...........................................................................................................................46 Documentation tab ...........................................................................................................46 Device Settings window ....................................................................................................47 Other links .........................................................................................................................48
3 Maintenance
Chapter contents ..................................................................................................................... 9 4 Life expectancies of supplies ..................................................................................................50 User-replaceable parts ............................................................................................................52 Replacing the tray 1 pickup roller and separation pad .....................................................52 Replacing the separation pad in optional tray 2 or in optional tray 3 ...............................57 Cleaning the printer ................................................................................................................. 1 6 Cleaning the printer ..........................................................................................................61 Calibrating the printer .............................................................................................................. 3 6 To calibrate the printer at the printer ................................................................................63 To calibrate the printer from the HP LaserJet Toolbox ....................................................63 Managing supplies ..................................................................................................................64 Supplies life ......................................................................................................................64 Checking and ordering supplies .......................................................................................64 Storing supplies ................................................................................................................65 Replacing and recycling supplies .....................................................................................65 HP policy for non-HP supplies ..........................................................................................66 HP fraud hotline ................................................................................................................ 6 6
4 Theory of operation
Chapter contents ..................................................................................................................... 7 6 Introduction ..............................................................................................................................68 Engine control system .............................................................................................................70 Basic sequence of operation ............................................................................................70 Power-on sequence ..........................................................................................................72 Motors and fans ................................................................................................................ 3 7 Laser/scanner system ............................................................................................................. 4 7 Pickup and feed system .......................................................................................................... 5 7 Paper trays .......................................................................................................................76 Jam detection ...................................................................................................................77 Photosensors and switches .............................................................................................. 8 7 Solenoid and clutches ......................................................................................................80 Printed circuit assemblies ................................................................................................. 2 8 Image-formation system ..........................................................................................................84 Image-formation process .................................................................................................. 5 8 Latent-image-formation stage ..........................................................................................85
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Developing stage .............................................................................................................. 6 8 Transfer stage ...................................................................................................................87 Fusing stage .....................................................................................................................89 Print cartridge ...................................................................................................................93 Imaging-drum E-label .......................................................................................................94
5 Removal and replacement
Chapter contents ..................................................................................................................... 7 9 Introduction ..............................................................................................................................99 Removal and replacement strategy ..................................................................................99 Electrostatic discharge .....................................................................................................99 User-replaceable parts .....................................................................................................99 Required tools ...................................................................................................................99 Before performing service ..................................................................................................... 01 1 Pre-service procedures ..................................................................................................101 Parts removal order ........................................................................................................102 Removal and replacement ....................................................................................................103 Imaging drum ..................................................................................................................103 Print cartridges ................................................................................................................103 Fuser cover (and fuser) ..................................................................................................104 Right- and left-side covers .............................................................................................. 06 1 Control panel ..................................................................................................................107 On-off switch ...................................................................................................................109 Interface cover ................................................................................................................ 10 1 Formatter assemblies .....................................................................................................111 Fuser motor ....................................................................................................................116 Dc controller ....................................................................................................................117 Optional tray 2 (250-sheet tray) ......................................................................................118 Carousel-engagement motor ..........................................................................................120 Front lower cover ............................................................................................................ 21 1 Back cover ...................................................................................................................... 22 1 Top cover ........................................................................................................................123 Top door .........................................................................................................................125 Air duct and fan ...............................................................................................................127 Laser/scanner assembly .................................................................................................128 Front cover ......................................................................................................................130 Density sensor and top-of-page sensor .........................................................................130 E-label reader (for imaging-drum E-labels) ....................................................................132 Tray 1 (multipurpose tray) ..............................................................................................133 Tray 1 separation pad assembly ....................................................................................135 Gear assembly ................................................................................................................136 Waste-toner sensor ........................................................................................................138 Rotary-drive assembly .................................................................................................... 39 1 Top plate .........................................................................................................................142 Print-cartridge carousel ..................................................................................................145 Aligning the carousel gears ............................................................................................149 Registration-roller assembly ...........................................................................................150 Toner-catch tray ..............................................................................................................151 Transfer-roller plate ........................................................................................................152 Transfer roller .................................................................................................................152 Feed-drive shaft ..............................................................................................................153 ECU pan .........................................................................................................................154 Sub-high-voltage transformer PCA ................................................................................157 High-voltage transformer PCA .......................................................................................158 Low-voltage PCA ............................................................................................................ 59 1
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Paper-top sensor ............................................................................................................160 Fuser-wrap sensor ..........................................................................................................161 250-sheet feeder pickup roller ........................................................................................162 500-sheet feeder pickup roller ........................................................................................163
6 Troubleshooting
Chapter contents.................................................................................................................... 67 1 Basic troubleshooting ............................................................................................................169 Clearing jams ........................................................................................................................171 Where to look for jams ....................................................................................................171 To clear jams from inside the printer ..............................................................................171 To clear jams from input areas .......................................................................................172 To clear jams from output areas .....................................................................................174 Control panel light messages ................................................................................................176 Supplies Status lights .....................................................................................................177 Printer Status lights ........................................................................................................182 Solving image-quality problems ............................................................................................190 Print-quality checklist ...................................................................................................... 90 1 Solving image-quality problems (all print jobs) ...............................................................190 Solving image-quality problems (color print jobs) ..........................................................200 Resolving problems that generated messages .....................................................................204 Messages for both Windows and Macintosh ..................................................................204 Messages for Windows only ...........................................................................................204 Resolving problems that did not generate messages ...........................................................206 Troubleshooting checklist ...............................................................................................206 Checking the network .....................................................................................................207 Solving general printing problems ..................................................................................207 Solving PostScript (PS) errors ........................................................................................212 Solving common Macintosh problems ............................................................................213 Manually rotating the print-cartridge carousel ................................................................216 Functional checks .................................................................................................................218 Engine test ......................................................................................................................218 High-voltage power-supply check ..................................................................................219 Paper-path check ...........................................................................................................219 Service mode functions .........................................................................................................221 Cold reset .......................................................................................................................221 NVRAM initializer ............................................................................................................221 Error report......................................................................................................................222 Super NVRAM initialization.............................................................................................222 Network card cold reset................................................................................................... 22 2 Using PJL commands .....................................................................................................223 Troubleshooting tools ............................................................................................................225 Demo page .....................................................................................................................225 Configuration page .........................................................................................................225 Supplies Status page ......................................................................................................226 Repetitive image defects ................................................................................................227 General timing charts .....................................................................................................228 Locations of connectors ..................................................................................................230 Dc controller connections ...............................................................................................233 Main wiring diagram .......................................................................................................234 HP LaserJet Toolbox .............................................................................................................236 To view the HP LaserJet Toolbox ..................................................................................236
7 Parts and diagrams
Chapter contents ................................................................................................................... 37 2
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Ordering parts and supplies .................................................................................................. 38 2 Parts ...............................................................................................................................238 Related documentation and software .............................................................................238 Supplies .......................................................................................................................... 38 2 Accessories ........................................................................................................................... 39 2 Assembly locations (1 of 2).............................................................................................241 Assembly locations (2 of 2).............................................................................................242 Covers.................................................................................................................................... 44 2 Internal assemblies................................................................................................................246 PCA assemblies..................................................................................................................... 68 2 Alphabetical parts list.............................................................................................................270 Numerical parts list.................................................................................................................278
Index
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List of tables
Table 1-1. Table 1-2. Table 1-3. Table 1-4. Table 1-5. Table 1-6. Table 1-7. Table 1-8. Table 1-9. Table 2-1. Table 3-1. Table 4-1. Table 4-2. Table 4-3. Table 4-4. Table 4-5. Table 4-6. Table 6-1. Table 6-2. Table 6-3. Table 6-4. Table 6-5. Table 6-6. Table 6-7. Table 6-8. Table 6-9. Table 6-10. Table 6-11. Table 6-12. Table 6-13. Table 6-14. Table 7-1. Table 7-2. Table 7-3. Table 7-4. Table 7-5. Table 7-6. Table 7-7. Table 7-8. Table 7-9. Table 7-10. Table 7-11. Table 7-12. Table 7-13. Table 7-14. Table 7-15.
HP color LaserJet 2550 series printer software ................................................9 Physical specifications ....................................................................................15 Supplies specifications ....................................................................................15 Electrical specifications ...................................................................................15 Environmental specifications ..........................................................................16 Acoustic emissions (HP color LaserJet 2550 series) .....................................16 Tray 1 specifications .......................................................................................17 Optional tray 2 specifications ..........................................................................18 Optional tray 3 specifications ..........................................................................18 Input tray configuration ....................................................................................37 Life expectancies of supplies ..........................................................................51 Basic sequence of operation ...........................................................................70 Motors and fans...............................................................................................73 Photosensors and switches.............................................................................79 Solenoid...........................................................................................................80 Clutches...........................................................................................................81 Printed circuit assemblies................................................................................83 Basic troubleshooting ....................................................................................169 Control panel lights legend ...........................................................................176 Supplies Status light messages ....................................................................177 Printer-status light messages ........................................................................182 Attention light messages, unnumbered.........................................................184 Attention light messages, numbered..............................................................185 Accessory error light messages.....................................................................186 Service error light messages.........................................................................186 Additional error messages.............................................................................189 Solving general printing problems .................................................................207 Problems in the Chooser ..............................................................................213 Printing Errors ...............................................................................................214 USB Problems ...............................................................................................215 Repetitive image defects................................................................................227 Technical support Web sites .........................................................................238 Accessories ...................................................................................................239 Covers ...........................................................................................................245 Front frame assembly ...................................................................................247 Internal components (1 of 2) .........................................................................251 Internal components (2 of 2) .........................................................................253 Main drive assembly......................................................................................255 Rear frame assembly ....................................................................................257 Middle frame assembly .................................................................................259 Rotary assembly ...........................................................................................263 Power-supply base assembly .......................................................................265 Rotary-drive assembly ..................................................................................267 PCA assemblies ............................................................................................269 Alphabetical parts list.....................................................................................270 Numerical parts list.........................................................................................278
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List of figures
Figure 1-1. Figure 2-1. Figure 2-2. Figure 2-3. Figure 3-1. Figure 3-2. Figure 3-3. Figure 4-1. Figure 4-2. Figure 4-3. Figure 4-4. Figure 4-5. Figure 4-6. Figure 4-7. Figure 4-8. Figure 4-9. Figure 4-10. Figure 4-11. Figure 4-12. Figure 4-13. Figure 4-14. Figure 4-15. Figure 4-16. Figure 4-17. Figure 4-18. Figure 4-19. Figure 4-20. Figure 4-21. Figure 4-22. Figure 4-23. Figure 4-24. Figure 4-25. Figure 4-26. Figure 4-27. Figure 4-28. Figure 4-29. Figure 5-1. Figure 5-2. Figure 5-3. Figure 5-4. Figure 5-5. Figure 5-6. Figure 5-7. Figure 5-8. Figure 5-9.
HP color LaserJet 2550 series printer identification label .................................8 Space required ................................................................................................32 Standard and optional input trays--HP color LaserJet 2550 series printers ............................................................................................................37 Printer output paths .........................................................................................38 Smearing..........................................................................................................61 Toner specks ...................................................................................................61 Loading the cleaning page in tray 1 ................................................................62 Cross-section of the printer .............................................................................68 Engine control system (includes the basic configuration of the printer) .........70 Power-on sequence ........................................................................................72 Motors and fans...............................................................................................73 Laser/scanner system .....................................................................................74 Pickup and feed system ..................................................................................76 Optional tray 2 (250-sheet paper tray) ............................................................77 Photosensors and switches (1 of 2) ................................................................78 Photosensors and switches (2 of 2).................................................................79 Solenoid ..........................................................................................................80 Clutches ..........................................................................................................81 Printed circuit assemblies (1 of 2) ...................................................................82 Printed circuit assemblies (2 of 2) ...................................................................83 Image-formation system ..................................................................................84 Image-formation process ................................................................................85 Step 1: primary charging .................................................................................86 Step 2: laser-beam exposure ..........................................................................86 Developing block .............................................................................................87 Step 3: developing ..........................................................................................87 Step 4: primary transfer ...................................................................................88 Step 5: secondary transfer ..............................................................................89 Step 6: separation ...........................................................................................89 Step 7: fusing ..................................................................................................90 Step 8: roller charging (auxiliary transfer belt cleaning roller) ........................90 Step 9: roller charging (transfer belt cleaning roller) .......................................91 Step 10: transfer belt cleaning ........................................................................92 Step 11: drum cleaning ...................................................................................93 Print cartridge ..................................................................................................94 Print-cartridge E-label .....................................................................................95 Removing the fuser cover (and fuser) ..........................................................105 Removing the right-side cover (1 of 2) ..........................................................106 Removing the right-side cover (2 of 2) ..........................................................107 Removing the control panel (1 of 2) ..............................................................108 Removing the control panel (2 of 2) ..............................................................109 Removing the on-off switch ...........................................................................110 Removing the interface cover .......................................................................111 Removing the formatter cage (1 of 2) ...........................................................112 Removing the formatter cage (2 of 2) ...........................................................113
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Figure 5-10. Figure 5-11. Figure 5-12. Figure 5-13. Figure 5-14. Figure 5-15. Figure 5-16. Figure 5-17. Figure 5-18. Figure 5-19. Figure 5-20. Figure 5-21. Figure 5-22. Figure 5-23. Figure 5-24. Figure 5-25. Figure 5-26. Figure 5-27. Figure 5-28. Figure 5-29. Figure 5-30. Figure 5-31. Figure 5-32. Figure 5-33. Figure 5-34. Figure 5-35. Figure 5-36. Figure 5-37. Figure 5-38. Figure 5-39. Figure 5-40. Figure 5-41. Figure 5-42. Figure 5-43. Figure 5-44. Figure 5-45. Figure 5-46. Figure 5-47. Figure 5-48. Figure 5-49. Figure 5-50. Figure 5-51. Figure 5-52. Figure 5-53. Figure 5-54. Figure 5-55. Figure 5-56. Figure 5-57. Figure 5-58. Figure 5-59. Figure 5-60. Figure 5-61. Figure 5-62. Figure 5-63. Figure 5-64. Figure 5-65.
Removing the formatter (1 of 2) ....................................................................114 Removing the formatter (2 of 2) ....................................................................115 Removing the network card...........................................................................116 Removing the fuser motor .............................................................................117 Removing the dc controller ...........................................................................118 Removing optional tray 2 (1 of 2) ..................................................................119 Removing optional tray 2 (2 of 2) ..................................................................120 Removing the carousel-engagement motor ..................................................121 Removing the front lower cover ....................................................................122 Removing the back cover .............................................................................123 Removing the top cover (1 of 2) ....................................................................124 Removing the top cover (2 of 2) ....................................................................125 Removing the top door (1 of 2) .....................................................................126 Removing the top door (2 of 2) .....................................................................127 Removing the air duct ...................................................................................128 Removing the laser/scanner assembly .........................................................129 Reinstalling the top output bin cover .............................................................129 Removing the front cover ..............................................................................130 Removing the density sensor cover ..............................................................131 Removing the density sensor ........................................................................131 Removing the E-label reader (1 of 2) ............................................................132 Removing the E-label reader (2 of 2) ............................................................133 Removing tray 1 (1 of 2) ................................................................................134 Removing tray 1 (2 of 2) ................................................................................135 Removing the tray 1 separation pad assembly .............................................136 Removing the gear assembly (1 of 2) ...........................................................137 Removing the gear assembly (2 of 2) ...........................................................138 Removing the waste-toner sensor ................................................................139 Removing the rotary-drive assembly (1 of 3) ................................................140 Removing the rotary-drive assembly (2 of 3) ................................................141 Removing the rotary-drive assembly (3 of 3) ................................................142 Removing the top plate (1 of 3) .....................................................................143 Removing the top plate (2 of 3) .....................................................................144 Reinstalling the grounding plate.....................................................................144 Removing the top plate (3 of 3) .....................................................................145 Removing the print-cartridge carousel (1 of 3) .............................................146 Removing the print-cartridge carousel (2 of 3) .............................................147 Removing the print-cartridge carousel (3 of 3) .............................................148 Reinstalling the print-cartridge carousel .......................................................150 Removing the registration-roller assembly ...................................................151 Removing the toner-catch tray ......................................................................151 Removing the transfer-roller plate .................................................................152 Removing the transfer roller ..........................................................................153 Removing the feed-drive shaft ......................................................................154 Removing the ECU pan (1 of 2) ....................................................................155 Removing the ECU pan (2 of 2) ....................................................................156 ECU connections ..........................................................................................156 Removing the sub-high-voltage transformer PCA ........................................157 Removing the high-voltage transformer PCA ...............................................158 Removing the low-voltage PCA (1 of 2) ........................................................159 Removing the low-voltage PCA (2 of 2) ........................................................160 Removing the paper-top sensor ....................................................................161 Removing the fuser wrap sensor ..................................................................162 Removing the 250-sheet feeder pickup roller ...............................................163 Removing the 500-sheet feeder pickup roller (1 of 2) ..................................164 Removing the 500-sheet feeder pickup roller (2 of 2) ..................................165
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Figure 6-1. Figure 6-2. Figure 6-3. Figure 6-4. Figure 6-5. Figure 6-6. Figure 6-7. Figure 6-8. Figure 6-9. Figure 6-10. Figure 6-11. Figure 6-12. Figure 6-13. Figure 6-14. Figure 6-15. Figure 7-1. Figure 7-2. Figure 7-3. Figure 7-4. Figure 7-5. Figure 7-6. Figure 7-7. Figure 7-8. Figure 7-9. Figure 7-10. Figure 7-11.
Control panel lights .......................................................................................176 Manually rotating the print-cartridge carousel ...............................................217 Location of the engine-test switch .................................................................218 Print cartridge high-voltage connection points ..............................................219 Overriding SW301 and the laser/scanner switch ..........................................220 General timing chart--WAIT period ...............................................................228 General timing chart--one page, full-color, normal speed ............................229 Locations of printer connectors (1 of 3) ........................................................230 Locations of printer connectors (2 of 3) ........................................................231 Locations of printer connectors (3 of 3) ........................................................231 Locations of 250-sheet tray connectors ........................................................232 Locations of 500-sheet tray connectors ........................................................232 Dc controller connections ..............................................................................233 Main wiring (1 of 2) ........................................................................................234 Main wiring (2 of 2) ........................................................................................235 Covers............................................................................................................244 Front frame assembly ...................................................................................246 Internal components (1 of 2)..........................................................................250 Internal components (2 of 2) .........................................................................252 Main drive assembly .....................................................................................254 Rear frame assembly ....................................................................................256 Middle frame assembly .................................................................................258 Rotary (carousel) assembly ..........................................................................262 Power-supply base assembly .......................................................................264 Rotary-drive assembly ..................................................................................266 PCA assemblies ............................................................................................268
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Product information
Chapter contents
Chapter contents ....................................................................................................................... 1 Printer configurations ................................................................................................................2 HP color LaserJet 2550L ....................................................................................................2 HP color LaserJet 2550Ln ..................................................................................................2 HP color LaserJet 2550n ....................................................................................................3 Printer features ..........................................................................................................................4 Printer overview..........................................................................................................................7 Hardware components........................................................................................................7 Model and serial numbers ..................................................................................................7 Software components ...............................................................................................................9 Software and supported operating systems .......................................................................9 Software tips ..................................................................................................................... 0 1 Software for Windows .......................................................................................................11 Software for Macintosh ..................................................................................................... 2 1 Uninstalling the printing software .....................................................................................13 Specifications ..........................................................................................................................15 Media specifications ................................................................................................................ 7 1 Supported media weights and sizes .................................................................................17 General guidelines ............................................................................................................18 Paper and print media ......................................................................................................19 Printing and storage environment ....................................................................................19 Envelopes ......................................................................................................................... 0 2 Labels ...............................................................................................................................21 Transparencies ................................................................................................................. 2 2 Hewlett-Packard limited warranty statement ..........................................................................23 Limited warranty for the print cartridges and imaging drum ...................................................24 Print cartridge information ....................................................................................................... 5 2 Refilled print cartridges ..................................................................................................... 5 2 HP LaserJet printing supplies ..........................................................................................25 HP Printing Supplies Returns and Recycling Program information..................................25 Regulatory statements ............................................................................................................27 Safety statements ...................................................................................................................28 Laser safety statement .....................................................................................................28 Canadian DOC statement ................................................................................................28 Korean EMI statement ...................................................................................................... 8 2 Finnish laser statement ....................................................................................................29
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Printer configurations
Thank you for purchasing the HP color LaserJet 2550 series printer. The printer is available in the following configurations.
HP color LaserJet 2550L
The HP color LaserJet 2550L printer is a four-color laser printer that prints letter-size pages up to 20 pages per minute (ppm) in black and white, A4-size pages up to 19 ppm, and it prints letter/A4-size pages at 4 ppm in color. It includes a PCL 6 printer driver and has PostScript® level 3 emulation.
Trays. The printer comes with a multipurpose tray (tray 1) that holds up to 125 sheets of various print media or 10 envelopes. The printer can also accept an optional 250-sheet tray (tray 2) for standard sizes and optional 500-sheet tray (tray 3) for A4 and letter sizes. (Optional tray 2 must be installed in order to install optional tray 3.) See Supported media weights and sizes for more information. Print cartridges. This model comes standard with color print cartridges (cyan, yellow, and magenta) that can print up to 2,000 pages at 5 percent coverage. It comes with a black print cartridge that can print up to 5,000 pages at 5 percent coverage. (A typical business letter has 5 percent coverage.) Connectivity. The printer provides parallel and universal serial bus (USB) ports for connectivity. The printer also accepts an optional HP Jetdirect external print server for connecting to a network. Memory. The printer comes standard with 64 MB RAM. Expandability. The printer has one available DIMM slot for memory expansion and additional font support. The memory is expandable to 192 MB by adding a 128-MB DIMM.
HP color LaserJet 2550Ln
The HP color LaserJet 2550Ln printer has the same features as the HP color LaserJet 2550L printer, except it includes an HP Jetdirect internal print server for connecting to a 10/100Base-T network. This model also accepts optional tray 2 and optional tray 3. (Optional tray 2 must be installed in order to install optional tray 3.)
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Chapter 1 Product information
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HP color LaserJet 2550n
The HP color LaserJet 2550n printer has the same features as the HP color LaserJet 2550Ln printer and also includes tray 2. This model also accepts optional tray 3. This model comes standard with high-capacity color print cartridges that can print up to 4,000 pages.
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Printer features
Feature Color printing HP color LaserJet 2550 series printer Provides laser printing in full color by using the four process colors: cyan, magenta, yellow, and black (CMYK). Prints in black on letter-size paper up to 20 ppm and on A4-size paper up to 19 ppm. Prints in color on A4/letter at 4 ppm. ImageREt 2400 provides 2400 dpi (dots per inch) color and laser-class quality through a multilevel printing process. True 600 x 600 dpi text and graphics. Adjustable settings to optimize print quality. The HP UltraPrecise print cartridge has a finer toner formulation that provides sharper text and graphics. Few supplies to order. Supplies are easy to install. Convenient access to printer information and settings by using the HP LaserJet Toolbox software. Convenient access to all supplies and to the paper path through the front door. Optional tray 2. (Included with the 2550n model; compatible with all other models.) This 250-sheet tray for standard sizes reduces how often you have to add paper to the printer. Only one 250-sheet tray can be installed on the printer. Optional tray 3. This 500-sheet tray for letter and A4 sizes reduces how often you have to add paper to the printer. Only one 500-sheet tray can be installed on the printer. Optional tray 2 must be installed in order to install optional tray 3. Optional HP Jetdirect external print server for connecting to a network (HP color LaserJet 2550L printer). One DIMM slot for adding memory and fonts.
Fast print speed
Excellent print quality
Ease of use
Expandability
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Feature Flexible paper handling
HP color LaserJet 2550 series printer Adjustable tray 1 (multipurpose tray) for letterhead, envelopes, labels, transparencies, custom-sized media, postcards, glossy paper, HP LaserJet Tough paper, and heavy paper. Optional tray 2 (250-sheet tray) that is adjustable for several standard sizes of paper. Optional tray 3 (500-sheet tray) for letterand A4-size paper. (Optional tray 2 must be installed in order to install optional tray 3.) One 125-sheet output bin and one output door. Select the top output bin (face down) for most jobs, including transparencies. Use the rear output door (face up) for jobs on heavy paper, light paper, or special print media. Straight-through paper path capability from tray 1 to the rear output door. Manual two-sided printing (duplexing). See Interface cover. Fast printing performance, built-in Intellifont and TrueType scaling technologies, built-in HP-GL/2 vector graphics, and advanced imaging capabilities are benefits of the PCL 6 printer language. The PCL 6 also includes 45 scalable TrueType fonts and one bitmapped Line Printer Font. The PCL 6 printer language also included. Includes 35 built-in PS language fonts. The printer automatically determines and switches to the appropriate printer language (such as PS or PCL 6) for the print job. Bidirectional enhanced capabilities port (ECP) type-B parallel port (IEEE-1284 compliant). High-speed USB port. Accepts an optional HP Jetdirect external print server (HP color LaserJet 2550L printer). The HP color LaserJet 2550Ln and 2550n printers include an HP Jetdirect internal print server.
Printer driver features
PostScript® (PS) level 3 emulation language and fonts Automatic language-switching
Interface connections
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Feature Networking
HP color LaserJet 2550 series printer Accepts an optional HP Jetdirect external print server (HP color LaserJet 2550L printer). The HP color LaserJet 2550Ln and 2550n printers include an HP Jetdirect internal print server. All common network protocols such as Ethernet, Token Ring, and LocalTalk are available by using an optional HP Jetdirect external print server. (The 2550Ln and 2550n models include an HP Jetdirect internal print server.) The printer comes with 64 MB of memory and can be expanded to 192 MB by using the DIMM slot. Most documents can be printed with the standard amount of printer memory through the aid of Memory Enhancement technology (MEt). MEt automatically compresses data, and almost doubles the printer memory and accommodating more complex printing with available memory. The printer automatically conserves electricity by substantially reducing power consumption when it is not printing. As an ENERGY STAR® partner, HewlettPackard Company has determined that this product meets ENERGY STAR® guidelines for energy efficiency. ENERGY STAR® is a U.S. registered service mark of the United States Environmental Protection Agency. N-up printing (printing more than one page on a sheet) and two-sided printing using manual duplexing saves paper. See To use a cleaning page and Interface cover. A Supplies Status page with print cartridge and imaging drum gauges that show the supply levels that remain. For HP supplies only. No-shake cartridge design. Authentication for HP print cartridges. Enabled supplies-ordering capability. Online user guide that is compatible with text screen-readers. Print cartridges and the imaging drum can be installed and removed by using one hand. All doors and covers can be opened by using one hand.
Enhanced memory and memory expansion
Energy savings
Economical printing
Supplies
Accessibility
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Chapter 1 Product information
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Printer overview
Hardware components
Before using the printer, familiarize yourself with the parts of the printer.
7 1 6 5 2 4 3
1 2 3 4 5 6 7
Top (face-down) output bin Power switch Optional tray 3 Optional tray 2 (included with HP color LaserJet 2550n model) Tray 1 Top cover Control panel
7
8
12 11
9 10
7 8 9 10 11 12 Control panel Interface ports * Optional tray 2 Optional tray 3 Power connector Rear (face-up) output door
* The interface ports are described in more detail in the next chapter. See Interface ports.
Model and serial numbers
The model number and serial number are listed on an identification label located underneath the top door.
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Printer overview
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The label contains information about the country/region of origin and the revision level, manufacturing date, production code, and production number of the product. The label also contains power rating and regulatory information.
Figure 1-1.
HP color LaserJet 2550 series printer identification label
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Chapter 1 Product information
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Software components
Software and supported operating systems
For easy printer setup and access to the full range of printer features, HP strongly recommends that you install the software that is provided. Not all software is available in all languages. See the HP Color LaserJet 2550 Series Printer Getting Started Guide for installation instructions, and see the Readme file for the latest software information. The most recent drivers, additional drivers, and other software are available from the Internet and other sources. See Related documentation and software. The printer supports the following operating systems: Microsoft® Windows® 98, Windows 2000, Windows Millennium Edition (Me), and Windows XP Windows NT® 4.0 (driver only, other printer software is not available) Macintosh OS 9.1, 9.2, 9.3, and OS X v.10.1 and later UNIX®, Linux, and OS/2 (limited functionality)
The following tables list the software that is available for your operating system. Table 1-1. HP color LaserJet 2550 series printer software
Feature Windows 98, Me Windows 2000 and XP Macintosh OS 9.1, 9.2, and 9.3 Macintosh OS X v. 10.1 and later UNIX®, Linux OS/2
Windows Installer PCL 6 printer driver PS printer driver HP Web Jetadmin software HP HP LaserJet Toolbox software Macintosh Installer
1
2
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Software components
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Table 1-1. HP color LaserJet 2550 series printer software (continued)
Feature Windows 98, Me Windows 2000 and XP Macintosh OS 9.1, 9.2, and 9.3 Macintosh OS X v. 10.1 and later UNIX®, Linux OS/2
Macintosh PostScript printer description (PPD) and printer dialog extensions (PDE) IBM drivers Model scripts
1 2
3 1
Available on the HP Web site. HP LaserJet Toolbox software support for Macintosh OS X, v. 10.2 or later. 3 Available on the HP Web site. Not specific to this printer.
Software tips
The following are some tips for working with the printer software.
Gaining access to the printer features
The printer features are available in the printer driver. Some features such as custom paper sizes and page orientation might also be available in the program that was used to create a file. Change settings in the program, if possible, because changes that are made in the program override changes that are made in the printer driver.
Obtaining the latest printing software
To check fo