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Q3704A Color LaserJet 2550N Printer

HP Color LaserJet 2550N (Q3704A)

MFG Part Number: Q3704A 19ppm black, 600 x 600 DPI

HP Color LaserJet 2550 printer service manual

Q3704A Service ManualView Service Manual Buy Q3704A Service ManualBuy Printed Manual

Manual contents and shortcuts

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
HP LaserJet printing supplies
HP Printing Supplies Returns and Recycling Program information
Refilled print cartridges
Regulatory statements
Safety statements
Canadian DOC statement
Korean EMI statement
Laser safety 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
Rear output door
Top output bin
Loading media
Loading tray 1
Loading optional tray 2
Loading optional tray 3
HP LaserJet Toolbox
Supported browsers
Supported operating systems
Status tab
Troubleshooting tab
Viewing the HP LaserJet Toolbox
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
Checking and ordering supplies
Supplies life
Replacing and recycling supplies
Storing supplies
HP fraud hotline
HP policy for non-HP supplies
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
Electrostatic discharge
Removal and replacement strategy
Required tools
User-replaceable parts
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
Density sensor and top-of-page sensor
Front cover
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
Transfer-roller plate
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
To clear jams from inside the printer
Where to look for jams
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
Network card cold reset
Super NVRAM initialization
Using PJL commands
Troubleshooting tools
Configuration page
Demo 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
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