HP LaserJet Enterprise 500 Color/ M551n, M551dn, M551xh Service Manual & Parts List

Service Manual & Parts List HP LaserJet Enterprise 500 Color, M551n, M551dn, M551xh;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your HP LaserJet Enterprise.
You can print, zoom or read any diagram, picture or page from this Service Manual & Parts List. 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 Enterprise 500 Color, M551n, M551dn, M551xh. You can find easily everything what do you need.
To see what contain, please read table of contents:

Basic operation
Sequence of operation
Engine control system
DC controller
Motors and fans
High voltage power supply
Low voltage power supply
Overcurrent/overvoltage protection
Sleep (powersave) mode
Power supply voltage detection
Low voltage power supply failure
Power off condition
Fuser control
Fuser temperature control circuit
Fuser over temperature protection
Fuser failure detection
Laser/scanner system
Image formation system
Image formation process
Step 1: Pre-exposure
Step 2: Primary charging
Step 3: Laser-beam exposure
Step 4: Development
Step 5: Primary transfer
Step 6: Secondary transfer
Step 7: Separation
Step 8: Fusing
Step 9: ITB cleaning
Step 10: Drum cleaning
Print cartridge
Developing roller engagement and disengagement
Intermediate transfer belt (ITB) unit
Primary-transfer-roller engagement and disengagement
ITB cleaning
Color misregistration control
Image stabilization control
Pickup, feed, and delivery system
Pickup-and-feed unit
Cassette pickup
Cassette presence detection
Cassette lift operation
Cassette paper presence detection
Cassette media width detection
Multifeed prevention
Multipurpose tray pickup
Paper feed
Skew-feed prevention
OHT detection
Fusing and delivery unit
Loop control
Pressure-roller pressurization control
Duplexing unit (duplex models)
Duplexing reverse and feed control
Duplex pickup operation
Jam detection
Optional paper feeder
Paper-feeder pickup and feed operation
Paper size detection and cassette presence detection
Paper feeder cassette lift operation
Paper feeder presence detection
Paper-feeder multiple feed prevention
Paper feeder jam detection

Removal and replacement strategy
Cautions during removal and replacement
Electrostatic discharge
Required tools
Service approach
Before performing service
After performing service
Post service test
Print-quality test
Parts removal order
Customer self repair (CSR) components
Print cartridges
Duplex reverse guide
Toner collection unit
Formatter PCA
Disk drives
Remove the HDD
Remove the SSM
Install a replacement hard drive
Reload the firmware
Tray cassette
Pickup roller (Tray 1)
Pickup roller (Tray 2)
Pickup and feed rollers (Tray 3)
Separation roller (Tray 2)
Secondary transfer roller
Reinstall the transfer roller
Secondary transfer assembly
Reinstall the secondary transfer assembly
Intermediate transfer belt (ITB)
Right door (optional paper feeder)
Identification and location
Front door assembly
Right door assembly
Right rear cover
Left cover
Remove the left cover
Left bottom cover
Remove the left bottom cover
Left bottom handle
Remove the left bottom handle
Hardware integration pocket (HIP) (dn and xh models only)
Control panel assembly
Right front cover
Remove the right front cover
Reinstall the power button
Front top cover
Remove the front top cover
Rear cover and upper rear cover
Remove the rear cover and upper rear cover
Rear top cover
Remove the rear top cover
Right bottom handle
Remove the right bottom handle
Rear bottom handle
Remove the rear bottom handle
Internal assemblies
Delivery fan, cartridge fan, and environmental sensor
Remove the delivery fan, cartridge fan, and environmental sensor
Toner collection sensor
Remove the toner collection sensor
Residual toner feed motor
Remove the residual toner feed motor
Reinstall the residual toner collection door
Registration density (RD) sensor assembly
Remove the RD sensor assembly
Power supply fan and fan duct
Remove the power supply fan and fan duct
Registration assembly
Remove the registration assembly
Lower pickup guide
Remove the lower pickup guide
Reinstall the lower pickup guide
Interconnect board (ICB)
Remove the ICB
DC controller PCA and tray
Remove the DC controller PCA
Low voltage power supply
Remove the low voltage power supply
High voltage power supply lower (HVPS-D)
Remove the high voltage power supply lower
Reinstall the high voltage power supply lower
Developing disengagement motor
Remove the developing disengagement motor
Pickup motor
Remove the pickup motor
Lifter drive assembly
Remove the lifter drive assembly
Automatic close assembly
Remove the automatic close assembly
Cassette pickup drive assembly
Remove the cassette pickup drive assembly
Reinstall the cassette pickup drive assembly
Cassette pickup assembly
Remove the cassette pickup assembly
Laser/scanner assembly (Y/M)
Remove the laser/scanner assembly (Y/M)
Laser/scanner assembly (C/Bk)
Remove the laser/scanner assembly (C/Bk)
Reinstall the protective glass cleaner (PGC) actuators
High voltage power supply upper (HVPS-T)
Remove the high voltage power supply upper
Reinstall the high voltage power supply upper
Drum motor 1
Remove the drum motor 1
Drum motor 2 or drum motor 3
Remove the drum motor 2 or drum motor 3
Fuser motor
Remove the fuser motor
Main drive assembly
Remove the main drive assembly
Reinstall the main drive assembly
Fuser drive assembly
Remove the fuser drive assembly
Reinstall the fuser drive assembly
Delivery assembly
Remove the delivery assembly
Reinstall the delivery assembly
Duplex drive assembly
Remove the duplex drive assembly
Optional paper feeder assembly (Tray 3)
Drawer connector

Solve problems checklist
Menu map
Current settings pages
Preboot menu options
Troubleshooting process
Determine the problem source
Troubleshooting flowchart
Power subsystem
Power-on checks
Power-on troubleshooting overview
Tools for troubleshooting
Individual component diagnostics
LED diagnostics
Understand lights on the formatter
Engine diagnostics
Defeating interlocks
Disable cartridge check
Engine test button
Paper path test
Paper path sensors test
Manual sensor test
Registration sensor
Fuser loop sensors
Fuser output sensor
Duplexer refeed sensor
Output-bin full sensor
Fuser pressure-release sensor
ITB alienation sensor
Right- and front-door interlock switches
Tray/bin manual sensor test
Print/stop test
Component tests
Component test (special-mode test)
Block diagrams
Location of connectors
DC controller PCA
Paper feeder driver PCA
Plug/jack locations
Locations of major components
Base product
1 x 500 paper feeder
General timing chart
Circuit diagrams
Internal print-quality test pages
Print quality troubleshooting pages
Print quality assessment page
Cleaning page
Set up an auto cleaning page
Configuration page
Configuration page
HP embedded Jetdirect page
Finding important information on the configuration pages
Color band test
Print quality troubleshooting tools
Repetitive defects ruler
Calibrate the product
Control panel menus
Sign In menu
Retrieve Job From USB menu
Retrieve Job From Device Memory menu
Supplies menu
Trays menu
Administration menu
Reports menu
General Settings menu
Retrieve From USB Settings menu
General Print Settings menu
Default Print Options menu
Display Settings menu
Manage Supplies menu
Manage Trays menu
Network Settings menu
Troubleshooting menu
Device Maintenance menu
Backup/Restore menu
Calibrate/Cleaning menu
USB Firmware Upgrade menu
Interpret control panel messages, status-alert messages, and event code errors
10.0X.Y0 Supply memory error
10.23.70 Printing past very low
10.XX.34 Used supply in use
10.XX.40 Genuine HP supplies installed
10.XX.41 Unsupported supply in use
10.XX.70 Printing past very low
10.YY.15 Install
10.YY.25 Wrong cartridge in  slot
10.YY.35 Incompatible
11.00.YY Internal clock error
13.WX.YZ Fuser area jam
13.WX.YZ Fuser wrap jam
13.WX.YZ Jam below control panel
13.WX.YZ Jam in middle right door
13.WX.YZ Jam in right door
13.WX.YZ Jam in Tray 1
13.WX.YZ Jam in Tray
20.00.00 Insufficient memory To continue, press OK
21.00.00 Page too complex
33.XX.YY Used board/disk
41.02.00 Error
41.03.YZ Unexpected size in tray
41.05.YZ Unexpected type in tray
41.07.YZ Error To continue, press OK
47.WX.YZ Printer calibration error To continue, press OK
49.XX.YY To continue, turn off then on
50.WX.YZ Fuser error To continue, turn off then on
51.00.YY Error
52.00.XX To continue, turn off then on
54.XX.YY Error
55.00.YY DC controller error To continue, turn off then on
55.0X.YY DC controller error To continue, turn off then on
56.00.YY Error To continue, turn off then on
57.00.0Y Error To continue, turn off then on
59.00.YY Error To continue, turn off then on
60.00.0Y Tray  lifting error
62.00.00 No system To continue, turn off then on
70.00.00 Error To continue, turn off then on
81.0X.YY Embedded JetDirect error
98.00.01 Corrupt data in firmware volume
98.00.02 Corrupt data in solutions volume
98.00.03 Corrupt data in configuration volume
98.00.04 Corrupt data in job data volume
99.00.01 Upgrade not performed file is corrupt
99.00.02 Upgrade not performed timeout during receive
99.00.03 Upgrade not performed error writing to disk
99.00.04 Upgrade not performed timeout during receive
99.00.05 Upgrade not performed timeout during receive
99.00.06 Upgrade not performed error reading upgrade
99.00.07 Upgrade not performed error reading upgrade
99.00.08 Upgrade not performed error reading upgrade
99.00.09 Upgrade canceled by user
99.00.10 Upgrade canceled by user
99.00.11 Upgrade canceled by user
99.00.12 Upgrade not performed the file is invalid
99.00.13 Upgrade not performed the file is invalid
99.00.14 Upgrade not performed the file is invalid
99.09.60 Unsupported disk
99.09.61 Unsupported disk
99.09.62 Unknown disk
99.09.63 Incorrect disk
99.09.64 Disk malfunction
99.09.65 Disk data error
99.09.66 No disk data installed
99.09.67 Disk is not bootable please download firmware
Full Remove all paper from bin
almost full
low OR Supplies low
very low OR Supplies very low
[File System] device failure To clear, press OK
[File System] file operation failed To clear, press OK
[File System] file system is full To clear, press OK
[File System] is not initialized
[File System] is write protected
Accept bad signature
Bad optional tray connection
Calibration reset pending
Checking engine
Checking paper path
Chosen personality not available To continue, press OK
Cleaning do not grab paper
Clearing event log
Clearing paper path
Close front door
Close lower right door
Close upper right door
Creating cleaning page
Data received To print last page, press OK
EIO  disk initializing
Event log is empty
Expected drive missing
HP Secure Hard Drive disabled
Incompatible supplies
Install  Close rear door
Install Fuser Unit
Install supplies
Install Transfer Unit
Internal disk not functional
Internal disk spinning up
Load Tray : [Type], [Size]
Load Tray : [Type], [Size] To use another tray, press OK
Manually feed output stack Then press OK to print second sides
Manually feed: [Type], [Size]
Manually feed: [Type], [Size] To use another tray, press OK
Moving solenoid
Moving solenoid and motor
No job to cancel
Performing Color Band Test
Performing Paper Path Test
Please wait
Printing CMYK samples
Printing Color Usage Log
Printing Configuration
Printing Demo Page
Printing Diagnostics Page
Printing Engine Test
Printing Event Log
Printing File Directory
Printing Font List
Printing Fuser Test Page
Printing Help Page
Printing Menu Map
Printing PQ Troubleshooting
Printing Registration Page
Printing RGB Samples
Printing stopped
Printing Supplies Status Page
Printing Usage Page
Processing duplex job Do not grab paper until job completes
Processing job from tray
Remove all print cartridges
Remove at least one print cartridge
Remove shipping lock from Tray 2
Replace Supplies
Restore Factory Settings
Restricted from printing in color
Rotating  motor
Rotating motor
Size mismatch in Tray
Sleep mode on
Supplies in wrong positions
Tray  empty: [Type], [Size]
Tray  open
Tray  overfilled
Type mismatch Tray
Unsupported drive installed To continue, press OK
Unsupported supply in use OR Unsupported supply installed To continue, press OK
Unsupported tray configuration
Unsupported USB accessory detected Remove USB accessory
USB accessory needs too much power Remove USB and turn off then on
USB accessory not functional
Used supply installed To continue, press OK OR Used supply in use
Wrong cartridge in  slot
Event log messages
Print an event log
View an event log
Clear an event log
Clear jams
Common causes of jams
Jam locations
Clear jams in Tray 1
Clear jams in the output bin area
Clear jams in Tray 2
Clear jams in the right door
Clear jams in the optional 500-sheet paper and heavy media tray (Tray 3)
Clear jams in the lower right door (Tray 3)
Jam causes and solutions
Jams in the output bin
Jams in the fuser and transfer area
Jams in the duplex area (duplex models)
Jams in Tray 1, Tray 2 and internal paper path
Jams in Tray 3
Change jam recovery
Solve paper handling problems
Product feeds multiple sheets
Paper does not feed automatically
Use manual print modes
Solve image quality problems
Image defects table
Clean the product
Clean the paper path
Set up an auto cleaning page
Solve performance problems
Solve connectivity problems
Solve direct connect problems
Solve network problems
Service mode functions
Service menu
Product resets
Restore factory-set defaults
Product cold reset
Clean Disk and Partial Clean functions
Active and repository firmware locations
Partial Clean
Execute a Partial Clean
Clean Disk
Execute a Clean Disk
Preboot menu options
Product updates
Determine the installed revision of firmware
Perform a firmware upgrade
Embedded Web Server
USB storage device (Preboot menu)
USB storage device (control-panel menu)

Order parts, accessories, and supplies
Part numbers
Print cartridges and toner collection unit
Customer self repair (CSR) and service kits
How to use the parts lists and diagrams

Right-door assembly
Internal assemblies
Internal assemblies (1 of 5)
Internal assemblies (2 of 5)
Internal assemblies (3 of 5)
Internal assemblies (4 of 5)
Internal assemblies (5 of 5)
Paper pickup assembly
1 x 500-sheet paper feeder
Paper feeder covers
Paper feeder main body
Paper feeder cassette
Paper feeder PCA
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
Color LaserJet Fuser Kit, Toner Collection Unit, and Transfer Kit Limited Warranty Statement
Data stored on the print cartridge
End User License Agreement
Customer self-repair warranty service
Customer support

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
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
Certificate of volatility
Types of memory
Volatile memory
Non-volatile memory
Mass Storage 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)

Number of pages: 646.