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Q3948A Color LaserJet 2820 all-in-one Printer all-in-one color laser printer that also functions as a copier scanner and fax machine has a monthly duty cycle of up to 30000 pages making it suitable for small offices or workgroups.

HP Color LaserJet 2820 all-in-one all-in-one color laser printer that also functions as a copier scanner and fax machine has a monthly duty cycle of up to 30000 pages making it suitable for small offices or workgroups. (Q3948A)

MFG Part Number: Q3948A 19ppm black, 4ppm color, Ethernet, USB 2.0

HP Color LaserJet 2820/2830/2840 service manual

Q3948A Service ManualView Service Manual Buy Q3948A Service ManualBuy Printed Manual

Manual contents and shortcuts

Product information
Chapter contents
Device configurations
HP Color LaserJet 2820 all-in-one
HP Color LaserJet 2830 all-in-one
HP Color LaserJet 2840 all-in-one
Device features
Device parts
Back view
Front view
Model and serial numbers
Software components
Software and supported operating systems
System requirements
Software tips
Software for Macintosh
Software for Windows
Embedded Web server (EWS)
HP Toolbox
Software installation
Uninstalling the printing software
Specifications
Media specifications
Supported media weights and sizes
General guidelines
Paper and print media
Special media print speeds
Printing and storage environment
Envelopes
Labels
Transparencies
Hewlett-Packard limited warranty statement
Print Cartridge and Imaging Drum Limited Warranty Statement
Print-cartridge information
HP LaserJet printing supplies
HP Printing Supplies Returns and Recycling Program information
Refilled print cartridges
Regulatory statements
FCC Requirements (United States)
EU statement for telecom operation
IC CS-03 requirements
New Zealand telecom statements
Telephone Consumer Protection Act (United States)
Declarations of conformity
Country-/region-specific safety statements
Installation and operation
Chapter contents
Operating environment
Interface ports
Control-panel features
Input trays
Output paths
Rear output bin
Top output bin
Loading media
Loading tray 1
Loading optional tray 2
Loading documents to scan
HP Toolbox
Viewing HP Toolbox
Fax tab
Status tab
Documentation tab
Scan to tab
Troubleshooting tab
Device Settings pages
HP Toolbox links
Other links
Embedded Web server
Features
Maintenance
Chapter contents
Life expectancies of components
Cleaning the device
Cleaning the device exterior and scanner
Cleaning the paper path
Managing supplies
Checking and ordering supplies
Supplies life
HP policy for non-HP supplies
Replacing and recycling supplies
Storing 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
Optional tray 2
Jam detection
Photosensors and switches
Solenoids 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
Scanner and ADF functions and operation
Scanner functions
Scanner operation
ADF operation
ADF paper path and ADF sensors
ADF jam detection
Fax functions and operation
PSTN operation
The fax subsystem
To receive faxes when you hear fax tones
Formatter in the fax subsystem
LIU in the fax subsystem
Fax page storage in flash memory
Removal and replacement
Chapter contents
Removal and replacement strategy
Required tools
Screws
Electrostatic discharge
After performing service
Before performing service
Post-service tests
Parts removal order
User-replaceable parts
Replacing the print cartridges
Replacing the imaging drum
Replacing the ADF
Replacing the ADF pickup-roller assembly
Removing the ADF separation pad
Replacing the ADF scanner glass
Replacing the fuser assembly
Replacing the control-panel bezel
Replacing the tray 1 pickup roller and separation pad
Covers
Removing the left cover
Removing the right cover
Removing the right rear cover
Removing the scanning assembly
Removing the left rear cover
Removing the left upper cover
Removing the right upper cover
Replacing the memory-card assembly (HP Color LaserJet 2840 all-in-one only)
Removing the input/output (I/O) cover
Removing the back cover
Removing the top cover assembly
Removing the upper multipurpose cover
Removing the density sensor and top-of-page sensor
Removing the multipurpose roller cover
Removing the lower multipurpose cover
Main assemblies
Removing the control panel
Removing the left support assembly
Removing the right support assembly
Removing the laser/scanner assembly
Removing the transfer-roller plate
Removing the transfer roller
Removing the formatter assemblies
Removing the E-label reader (for imaging-drum E-labels)
Removing the DC controller
Removing the top plate
Removing the gear assembly
Removing the waste-toner sensor
Removing the rotary-drive assembly
Removing the print-cartridge carousel
Aligning the carousel gears
Removing the registration-roller assembly
Removing the toner-catch tray
Removing the feed-drive shaft and belts
Removing the power supply cover plate
Removing the paper-top sensor
Removing the fuser-wrap sensor
Motors and fans
Removing the fuser motor
Removing the air duct and fan
Removing the carousel-engagement motor
Printed circuit assemblies (PCAs)
Removing the sub-high-voltage transformer PCA
Removing the high-voltage transformer PCA
Removing the low-voltage PCA
Trays
Removing tray 1 (multipurpose tray)
Removing optional tray 2 (250-sheet tray)
Removing the optional tray 2 pickup roller
Replacing the optional tray 2 separation pad
Troubleshooting
Support strategy
Troubleshooting process
Troubleshooting checklist
Control-panel messages
Alert and warning messages
Critical error messages
Clearing jams
Media jams occur in the device
Media jams occur in the automatic document feeder (ADF)
Print problems
Print quality problems
Media-handling problems
Performance problems
Scan problems
Solving scanned image problems
Scan quality problems
Scan-specific error messages
Copy problems
Image problems
Preventing problems
Media-handling problems
Performance problems
Fax problems
Problems receiving faxes
Problems sending faxes
Voice call problems
Media-handling problems
Performance problems
Memory card problems
Index page not printing
Missing or wrong files
Proof sheet not printing
Proof sheet not scanning
Issues with photo printing
Functional tests
Engine test
Half self-test check
Heating element test
Cartridge high-voltage contact test
Paper-path test
Service-mode functions
NVRAM initialization
Secondary service menu
Troubleshooting tools
Device pages and reports
Fax reports
HP Toolbox
Service menu
Service-only tools
Updating or recovering the firmware code
Firmware update by using flash executable
Firmware-recovery DIMM
Parts and diagrams
Chapter contents
Ordering parts and supplies
Parts
Related documentation and software
Supplies
Accessories
Accessories
Replacement kits
Automatic document feeder and scanner assembly
Assembly locations (1 of 2)
Assembly locations (2 of 2)
Covers
Internal assemblies
Printed circuit assemblies (PCAs)
Alphabetical parts list
Numerical parts list
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