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Q5957A LaserJet 2420D Printer

HP LaserJet 2420D (Q5957A)

MFG Part Number: Q5957A 28ppm black, 1200 x 1200 DPI

HP LaserJet 2400 printer series service manual

Q5957A Service ManualView Service Manual Buy Q5957A Service ManualBuy Printed Manual

Manual contents and shortcuts

Product Information
Chapter contents
Printer configurations
HP LaserJet 2400 Series printer base models
Features
Specifications
Physical specifications
Electrical specifications
Acoustic emissions
Operating environment
Media specifications
Supported types and sizes of print media
Paper and print media
Printing and paper storage environment
Envelopes
Envelopes with adhesive strips or flaps
Envelopes with double side seams
Envelope margins
Envelope storage
Labels
Transparencies
Hewlett-Packard limited warranty statement
Print Cartridge Limited Warranty Statement
HP LaserJet printing supplies
Declaration of conformity
Country-/region-specific safety statements
Canadian DOC statement
Japanese VCCI statement
Korean EMI statement
Laser safety statement
Finnish laser statement
Installation
Chapter contents
Interface ports
Operating environment
Software
Operating systems and printer components
Printer drivers
Software for Macintosh computers
Operation
Chapter contents
Control panel
Control-panel layout
Control-panel buttons
Control-panel lights
Control-panel language
Printing control-panel menus
Selecting which tray is used for printing
Understanding tray order
Customizing tray 1 operation
Printing by type and size of media (locking trays)
Feeding media from tray 1 manually
Selecting the correct fuser mode
Using the embedded Web server
Opening the embedded Web server
Information tab
Settings tab
Networking tab
Other links
Using HP Web Jetadmin software
Using the HP Toolbox
Supported browsers
Supported operating systems
Status tab
To view the HP Toolbox
Alerts tab
Troubleshooting tab
Device Settings window
Documentation tab
Other links
Toolbox links
Checking the printer configuration
Uninstalling the HP Toolbox
Menu map
To uninstall the HP Toolbox by using the Windows desktop shortcut
Configuration page
Supplies status page
PS or PCL font list
Managing the print cartridge
HP print cartridges
Non-HP print cartridges
Print-cartridge authentication
Print-cartridge storage
Checking the supply level
Print-cartridge life expectancy
Cartridge-low and cartridge-out conditions
Maintenance
Chapter contents
Cleaning the printer
Cleaning the outside
Cleaning the paper path and print-cartridge areas
Cleaning the fuser
Theory of operation
Chapter contents
Introduction
Internal components
Timing
Engine control system
Laser/scanner system
Pickup/feed/delivery system
Image-formation system
Step 1: Primary charging
Step 2: Laser beam exposure
Step 3: Developing
Step 4: Transfer
Step 5: Separation
Step 6: Fusing
Step 7: Drum cleaning
Print cartridge memory system
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
Covers
Right-side cover
Back cover
I/O cover
Left-side cover
Top, right cover
Top cover
Front, right cover
Control panel
Formatter
Fuser
Laser/scanner
Right-side handle
ECU
Access plate
Power supply
Gear assembly
Tray 1 solenoid
Tray 2 solenoid
E-label reader (memory tag)
Face-down-roller shaft
Cartridge door
Transfer roller
Registration assembly
Tray 1 pickup roller
Tray 2 pickup roller
Separation pad
Troubleshooting
Chapter contents
Troubleshooting tree
Troubleshooting flowchart
1. Does the control-panel display show READY?
2. Can you print a configuration page?
3. Can you print from a program?
4. Does the job print as expected?
5. Does the printer select the correct trays?
Troubleshooting tools
Information pages
Embedded Web server
Gaining access to the embedded Web server
Printer Status and Alerts software
Control-panel menus
Using control-panel menus
Diagnostics menu
Resets submenu
Service menu (service PIN codes)
Printer resets and power-on modes
Cold reset
Hard-disk initialization
NVRAM initialization
Power-on bypass
Save + Restore
Test pages
Engine-test page
Formatter test page
Interface troubleshooting
Communications checks
EIO troubleshooting
Solving general printing problems
Clearing jams
Avoiding jams
Typical jam locations
Media handling problems
Multiple pages feed
Pages are skewed
Pages are wrinkled or folded
Understanding printer messages
Resolving persistent messages
Using the printer online Help system
Correcting print-quality problems
Image-defect examples
Print-quality checklist
Light print (entire page)
Light print (partial page)
Dropouts
Specks
Gray background
Lines
Loose toner
Toner smear
Repeating defects
Repeating image
Misformed characters
Page skew
Curl or wave
Wrinkles or creases
Tire tracks
Vertical white lines
Scattered lines
White spots on black
Blurred print
Random image repetition
Troubleshooting common Windows problems
Troubleshooting common Macintosh problems
Troubleshooting common PostScript problems
General problems
Specific errors
Printer component locations
Main assemblies
Main parts
Sensors and switches
Motors, fans, and solenoids
PCAs
500-Sheet paper feeder
Wiring diagrams
General timing diagrams
Parts and diagrams
Chapter contents
Ordering parts and supplies
Parts
Related documentation and software
Supplies
Accessories
Covers
Internal components
Tray 2 pickup assembly
Alphabetical parts list
Numerical parts list
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