HP Color LaserJet 2550 Service Manual EN Color_Laser Jet_2550_sm Laser Jet Sm

• Product information
  • Chapter contents
  • Printer configurations
    • HP color LaserJet 2550L
    • HP color LaserJet 2550Ln
    • HP color LaserJet 2550n
  • Printer features
  • Printer overview
    • Hardware components
    • Model and serial numbers
  • Software components
    • Software and supported operating systems
    • Software tips
    • Software for Windows
    • Software for Macintosh
    • Uninstalling the printing software
  • Specifications
  • Media specifications
    • Supported media weights and sizes
    • General guidelines
    • Paper and print media
    • Printing and storage environment
    • Envelopes
    • Labels
    • Transparencies
  • Hewlett-Packard limited warranty statement
  • Limited warranty for the print cartridges and imaging drum
  • Print cartridge information
    • Refilled print cartridges
    • HP LaserJet printing supplies
    • HP Printing Supplies Returns and Recycling Program information
  • Regulatory statements
  • Safety statements
    • Laser safety statement
    • Canadian DOC statement
    • Korean EMI statement
    • Finnish laser statement
• Installation and operation
  • Chapter contents
  • Operating environment
  • Interface ports
  • Control panel features
    • Understanding Supplies Status
    • Understanding Printer Status
  • Input trays
  • Printer output paths
    • Top output bin
    • Rear output door
  • Loading media
    • Loading tray 1
    • Loading optional tray 2
    • Loading optional tray 3
  • HP LaserJet Toolbox
    • Supported operating systems
    • Supported browsers
    • Viewing the HP LaserJet Toolbox
    • Status tab
    • Troubleshooting tab
    • Alerts tab
    • Documentation tab
    • Device Settings window
    • Other links
• Maintenance
  • Chapter contents
  • Life expectancies of supplies
  • User-replaceable parts
    • Replacing the tray 1 pickup roller and separation pad
    • Replacing the separation pad in optional tray 2 or in optional tray 3
  • Cleaning the printer
    • Cleaning the printer
  • Calibrating the printer
    • To calibrate the printer at the printer
    • To calibrate the printer from the HP LaserJet Toolbox
  • Managing supplies
    • Supplies life
    • Checking and ordering supplies
    • Storing supplies
    • Replacing and recycling supplies
    • HP policy for non-HP supplies
    • HP fraud hotline
• Theory of operation
  • Chapter contents
  • Introduction
  • Engine control system
    • Basic sequence of operation
    • Power-on sequence
    • Motors and fans
  • Laser/scanner system
  • Pickup and feed system
    • Paper trays
    • Jam detection
    • Photosensors and switches
    • Solenoid and clutches
    • Printed circuit assemblies
  • Image-formation system
    • Image-formation process
    • Latent-image-formation stage
    • Developing stage
    • Transfer stage
    • Fusing stage
    • Print cartridge
    • Imaging-drum E-label
• Removal and replacement
  • Chapter contents
  • Introduction
    • Removal and replacement strategy
    • Electrostatic discharge
    • User-replaceable parts
    • Required tools
  • Before performing service
    • Pre-service procedures
    • Parts removal order
  • Removal and replacement
    • Imaging drum
    • Print cartridges
    • Fuser cover (and fuser)
    • Right- and left-side covers
    • Control panel
    • On-off switch
    • Interface cover
    • Formatter assemblies
    • Fuser motor
    • Dc controller
    • Optional tray 2 (250-sheet tray)
    • Carousel-engagement motor
    • Front lower cover
    • Back cover
    • Top cover
    • Top door
    • Air duct and fan
    • Laser/scanner assembly
    • Front cover
    • Density sensor and top-of-page sensor
    • E-label reader (for imaging-drum E-labels)
    • Tray 1 (multipurpose tray)
    • Tray 1 separation pad assembly
    • Gear assembly
    • Waste-toner sensor
    • Rotary-drive assembly
    • Top plate
    • Print-cartridge carousel
    • Aligning the carousel gears
    • Registration-roller assembly
    • Toner-catch tray
    • Transfer-roller plate
    • Transfer roller
    • Feed-drive shaft
    • ECU pan
    • Sub-high-voltage transformer PCA
    • High-voltage transformer PCA
    • Low-voltage PCA
    • Paper-top sensor
    • Fuser-wrap sensor
    • 250-sheet feeder pickup roller
    • 500-sheet feeder pickup roller
• Troubleshooting
  • Chapter contents
  • Basic troubleshooting
  • Clearing jams
    • Where to look for jams
    • To clear jams from inside the printer
    • To clear jams from input areas
    • To clear jams from output areas
  • Control panel light messages
    • Supplies Status lights
    • Printer Status lights
  • Solving image-quality problems
    • Print-quality checklist
    • Solving image-quality problems (all print jobs)
    • Solving image-quality problems (color print jobs)
  • Resolving problems that generated messages
    • Messages for both Windows and Macintosh
    • Messages for Windows only
  • Resolving problems that did not generate messages
    • Troubleshooting checklist
    • Checking the network
    • Solving general printing problems
    • Solving PostScript (PS) errors
    • Solving common Macintosh problems
    • Manually rotating the print-cartridge carousel
  • Functional checks
    • Engine test
    • High-voltage power-supply check
    • Paper-path check
  • Service mode functions
    • Cold reset
    • NVRAM initializer
    • Error report
    • Super NVRAM initialization
    • Network card cold reset
    • Using PJL commands
  • Troubleshooting tools
    • Demo page
    • Configuration page
    • Supplies Status page
    • Repetitive image defects
    • General timing charts
    • Locations of connectors
    • Dc controller connections
    • Main wiring diagram
  • HP LaserJet Toolbox
    • To view the HP LaserJet Toolbox
• Parts and diagrams
  • Chapter contents
  • Ordering parts and supplies
    • Parts
    • Related documentation and software
    • Supplies
  • Accessories
    • Assembly locations (1 of 2)
    • Assembly locations (2 of 2)
  • Covers
  • Internal assemblies
  • PCA assemblies
  • Alphabetical parts list
  • Numerical parts list
• Index