HP LaserJet PRO 300 color M351A, HP LaserJet PRO 400 color M451dn/dw/nw, Service Manual & Parts List

Service Manual & Parts List HP LaserJet Pro 300 color M351a, HP LaserJet Pro 400 color M451dn/dw/nw;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your HP.
You can print, zoom or read any diagram, picture or page from this Service & Parts List Manual. Every chapter on this manual is fully detailed and contain all the  simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of HP LaserJet Pro 300 color M351a, HP LaserJet Pro 400 color M451dn/dw/nw photocopier. You can find easily everything what do you need.
To see what contain, please read table of contents:

Removal and replacement strategy
Removal and replacement strategy
Electrostatic discharge
Required tools
Types of screws
Service approach
Before performing service
After performing service
Post-service test
Print-quality test
Parts removal order
Removal and replacement procedures
Tray 2 cassette
Rollers and pads
Replace the transfer roller
Replace the pickup roller
Repalce the separation roller
Reinstall the separation roller
Replace the pickup roller and separation pad (Tray 1)
Main assemblies
Print-cartridge drawer
DIMM cover
Right cover
Reinstall the right cover
Rear-upper cover (duplex product)
Rear-door stopper and link caps (simplex product)
Rear door (simplex product)
Rear door (duplex product)
Rear cover and feed guide (simplex product)
Remove the rear cover and feed guide (simplex product)
Rear-lower cover and rear-door links (duplex product)
Remove the rear-lower cover and rear-door links (duplex product)
Rear-door rib assembly (duplex product)
Remove the rear-door rib assembly (duplex product)
Link guide
Upper-cover assembly
Reinstall the upper cover
Left cover
Remove the left cover
Reinstall the left cover
Right-front cover and power button
Remove the right-front cover and power button
Paper-feed guide assembly
Control-panel assembly
Remove the control-panel assembly
Right panel
Remove the right panel
Front-door assembly
Remove the front-door assembly
Reinstall the front-door assembly
Intermediate transfer belt (ITB)
Reinstall the ITB
Drum motor (M1) and developer motor (M2)
Reinstall the drum motor (M1) and developer motor (M2)
Intermediate PCA
Remove the intermediate PCA
Formatter PCA
Special considerations
Remove the formatter PCA
DC controller PCA
Special considerations
Remove the DC controller PCA
Fuser motor assembly
Remove the fuser motor assembly
Reinstall the fuser motor assembly
High-voltage power-supply PCA
Remove the high-voltage power-supply PCA
Color-misregistration sensor assembly PCA
Remove the color-misregistration sensor assembly PCA
Reinstall the color-misregistration sensor assembly
Duplex reverse-drive assembly
Remove the duplex reverse-drive assembly
Remove the fuser
Reinstall the fuser
Paper-delivery assembly
Remove the paper-delivery assembly

Solve problems checklist
Menu map
Troubleshooting process
Pretroubleshooting checklist
Power-on checks
Tools for troubleshooting
Engine diagnostics
Plug/jack locations
Location of connectors
DC controller PCA
Location of major components
Major components
Solenoids, clutches, and sensors
Motors and fans
General timing charts
General circuit diagram
CPU/ASIC diagrams
HVT/Toner EMP diagram
Driver PCA diagram
Duplexer PCA diagram
FSR diagram
Internal print quality test pages
Print quality troubleshooting page
Print quality assessment page
Print the configuration page
Print-quality troubleshooting tools
Repetitive image defects
Calibrate the product
Control panel menus
Reports menu
Quick Forms menu
System Setup menu
Service menu
Network Setup menu
Interpret control panel messages
Control panel message types
Control panel messages
10.XXXX Supply error
49 Error Turn off then on
50.X Fuser error Turn off then on
51.XX Error Turn off then on
54.XX Error Turn off then on
55.X Error Turn off then on
57 Fan error Turn off then on
59.X Error Turn off then on
79 Error Turn off then on
79 Service error Turn off then on
Black cartridge low
Black in wrong position
Black very low
Cyan cartridge low
Cyan in wrong position
Cyan very low
Device error Press [OK]
Front door open
Genuine HP supply installed
Incorrect supplies
Install  cartridge
Invalid driver Press [OK]
Jam in
Jam in tray # Clear jam and then Press [OK]
Load tray #
Load tray 1 plain  Cleaning Mode [OK] to start
Load tray  Press [OK] for available media
Load tray 1
Magenta cartridge low
Magenta in wrong position
Magenta very low
Manual duplex Load tray  Press [OK]
Manual feed   Press [OK] for available media
Memory is low Press [OK]
Misprint Press [OK]
Print failure, press OK. If error repeats, turn off then on
Rear door open
Remove shipping lock from  cartridge
Remove shipping locks from cartridges
Supplies low
Unexpected size in tray # Load  Press [OK]
Unsupported  Press [OK] to continue
Used  in use
Used  installed Press [OK] to continue
Used supplies in use
Yellow cartridge low
Yellow in wrong position
Yellow very low
Event log messages
Clear jams
Common causes of jams
Jam locations
Clear jams in Tray 1
Clear jams in Tray 2
Clear jams in the fuser area
Clear jams in the output bin
Clear jams in the duplexer (duplexing models only)
Solve paper-handling problems
The product picks up multiple sheets of paper
The product does not pick up paper
Solve image-quality problems
Print quality examples
Color image defects
Clean the product
Clean the pickup and separation rollers
Clean the paper path
Solve performance problems
Factors affecting print performance
Print speeds
The product does not print or it prints slowly
The product does not print
The product prints slowly
Solve product connectivity problems
Solve direct-connect problems
Solve network problems
Poor physical connection
The computer is using the incorrect IP address for the product
The computer is unable to communicate with the product
The product is using incorrect link and duplex settings for the network
New software programs might be causing compatibility problems
The computer or workstation might be set up incorrectly
The product is disabled, or other network settings are incorrect
Solve wireless network problems
Wireless connectivity checklist
The control panel displays the message: The wireless feature on this product has been turned off
The product does not print after the wireless configuration completes
The product does not print, and the computer has a third-party firewall installed
The wireless connection does not work after moving the wireless router or product
Cannot connect more computers to the wireless product
The wireless product loses communication when connected to a VPN
The network does not appear in the wireless networks list
The wireless network is not functioning
Service mode functions
Service menu
Secondary service menu
Open the secondary service menu
Secondary service menu structure
Product resets
Restore factory-set defaults
NVRAM initialization
Cold reset
Product updates

Order parts by authorized service providers
Orderable parts
Whole unit replacement
Related documentation and software
Supplies and accessories
Service parts
How to use the parts lists and diagrams
Internal assemblies
Internal assemblies (1 of 5)
Internal assemblies (2 of 5)
Internal components (3 of 5)
Internal assemblies (4 of 5)
Internal assemblies (5 of 5)
Internal assemblies (simplex models)
Internal assemblies (duplex models)
Input device(s)
250-sheet paper feeder (optional Tray 3)
Alphabetical parts list
Numerical parts list

Appendix A: Service and support
Hewlett-Packard limited warranty statement
HP’s Premium Protection Warranty: LaserJet print cartridge limited warranty statement
Data stored on the print cartridge
End User License Agreement
Customer support
Repack the product

Appendix B: Product specifications
Physical specifications
Power consumption, electrical specifications, and acoustic emissions
Environmental specifications

Appendix C: Regulatory information
FCC regulations
Environmental product stewardship program
Protecting the environment
Ozone production
Power consumption
Toner consumption
Paper use
HP LaserJet print supplies
Return and recycling instructions
United States and Puerto Rico
Multiple returns (more than one cartridge)
Single returns
Non-U.S. returns
Material restrictions
Disposal of waste equipment by users in private households in the European Union
Chemical substances
Material Safety Data Sheet (MSDS)
For more information
Declaration of conformity
Declaration of conformity (wireless models)
Certificate of volatility
Types of memory
Volatile memory
Non-volatile memory
Safety statements
Laser safety
Canadian DOC regulations
VCCI statement (Japan)
Power cord instructions
Power cord statement (Japan)
EMC statement (Korea)
Laser statement for Finland
GS statement (Germany)
Substances Table (China)
Restriction on Hazardous Substances statement (Turkey)
Restriction on Hazardous Substances statement (Ukraine)
Additional statements for wireless products
FCC compliance statement-United States
Australia statement
Brazil ANATEL statement
Canadian statements
European Union regulatory notice
Notice for use in France
Notice for use in Russia
Korean statement
Taiwan statement
Vietnam Telecom wired/wireless marking for ICTQC Type approved products

HP LaserJet PRO300 color HP LJ PRO300 color M351A, HP LaserJet PRO400 color M451dn/dw/nw