HP LaserJet Pro M14-M17 and LaserJet Pro MFP M28-M31 Service Manual and Parts List Manual


This Service Manual contain: Repair Manual and Troubleshooting Manual HP LaserJet Pro M14-M17 and LaserJet Pro MFP M28-M31.
Accurate and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
To see what contain, please read table of contents:

Content for REPAIR MANUAL:
1) REMOVAL AND REPLACEMENT
For additional service and support
Removal and replacement strategy
Introduction
Considerations during removal and replacement
Electrostatic discharge
Required tools
Fasteners used in this printer
Service approach
Before performing service
Accessing the secondary service menu
After performing service
Post-service tests
Order parts by authorized service providers
Ordering
Orderable parts
Whole unit replacement (WUR)
Supplies and accessories
Related documentation and software
Removal and replacement procedures
Customer self-repair (CSR) components
Field Replaceable Units (FRUs) / Bench Repair Units (BRUs)

2) PARTS AND DIAGRAMS
For additional service and support
Assembly locations
External panels, doors, and covers
Main assemblies
Main parts
PCA
Order parts, accessories, and supplies
Ordering
Orderable parts
Supplies
Customer self-repair parts
Related documentation and software
How to use the parts lists and diagrams
Covers
Covers (M14-M17)
Covers (MFP M28-M31)
Internal components
Internal components (1 of 2)
Internal components (2 of 2)
Alphabetical parts list
Numerical parts list
INDEX

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Content for TROUBLESHOOTING MANUAL:
1) THEORY OF OPERATION
Basic operation
Sequence of operation
Formatter-control system
Sleep delay
Auto-On / Auto-Off mode
Printer job language (PJL)
Printer management language (PML)
Control panel
Wireless (wireless models)
Low end data model (LEDM)
Advanced control language (ACL) overview
Near field communication (NFC) (wireless models)
CPU
Input/output
USB
Memory
Firmware
Nonvolatile random access memory (NVRAM)
Random access memory (RAM)
HP Memory enhancement technology (MEt)
Engine-control system
DC controller
Motors
Solenoids
Switches
Sensors
Low-voltage power supply
Low-voltage power supply voltages description
Overcurrent/overvoltage protection
Sleep mode operation
Low-voltage power supply unit failure detection
High-voltage power supply
Fuser control
Introduction
Fuser circuits
Fuser heater protection
Engine laser scanner system
Laser failure detection
Pickup, feed, and delivery system
Introduction
Photo sensors and switches
Motors, clutches, and solenoids
Jam detection/prevention
Scanning and image capture system (MFP M28-M31)

2) SOLVE PROBLEMS
Solve problems checklist
Print a configuration report
Check the event log using the HP Embedded Web Server or HP Tool Box
Troubleshooting process
Determine the problem source
Troubleshooting flowchart
Power subsystem
Power-on checks
Power-on troubleshooting overview
Tools for troubleshooting
Individual component diagnostics
Tools for troubleshooting: Engine diagnostics
Engine test
Half self-test functional check
Drum rotation functional check
Diagrams
Diagrams: Block diagrams
Sensors and switches
Motor
Image-formation system
Diagrams: Printed circuit assembly (PCA) connector locations
Diagrams: Formatter connections
Diagrams: Engine controller unit (ECU) connections
Diagrams: External plug and port locations
Diagrams: Locations of major components
External panels, doors, and covers
Main assemblies
Main parts
PCA
Diagrams: Timing chart
Diagrams: Circuit diagrams
Advanced configuration with HP Embedded Web Server (EWS) and HP Device Toolbox (Windows)
Control panel (layout and interpreting light patterns)
Control panel (M14-M17)
Base model (M14-M17)
Wireless models (M14-M17)
Interpret control-panel light patterns (M14-M17)
Control panel (MFP M28-M31)
Base model (MFP M28-M31)
Wireless models (MFP M28-M31)
Interpret control-panel light patterns (MFP M28-M31)
Improve print quality
Introduction
Update the printer firmware
Print from a different software program
Check the paper-type setting for the print job
Check the paper type setting on the printer
Check the paper type setting (Windows)
Check the paper type setting (OS X)
Check toner-cartridge status
Print a cleaning page
Visually inspect the toner cartridge
Check paper and the printing environment
Step one: Use paper that meets HP specifications
Step two: Check the environment
Try a different print driver
Adjust Print Density
Print quality troubleshooting guide
Resolving print quality problems
Introduction
Troubleshoot print quality problems
Printer-specific image defects
Repetitive image defects
Use a ruler to measure between repetitive defects
Printer-specific print quality troubleshooting guide
Light print
Dark print
Blank page
All black
White spots
Dirt on the back of the page
Vertical lines
Vertical white lines
Horizontal lines
Horizontal white lines
Dropouts
Loose toner
Toner smear
Misformed or misplaced image
Wrinkles or creases
Dirt on the front of the page
Vertical density variation
Repetitive image defects
Improve copy and scan image quality (MFP M28-M31)
Introduction
Check the scanner glass for dirt and smudges
Check the paper settings
Optimize for text or pictures
Edge-to-edge copying
Clean the printer
Print a cleaning page
Clean the scanner glass and platen (MFP M28-M31)
Clean the pickup rollers
Solve paper-handling problems
Printer does not pick up paper or misfeeds
Introduction
The product does not pick up paper
The product picks up multiple sheets of paper
Prevent paper jams
Clear paper jams
Introduction
Paper path jam sensor locations
Experiencing frequent or recurring paper jams?
Paper jam locations
Clear jams from the input tray
Clear jams from inside the product
Clear jams from the output areas
Solve performance problems
Solve connectivity problems
Solve USB connection problems
Solve wireless network problems
Introduction
Wireless connectivity checklist
The printer does not print after the wireless configuration completes
The printer does not print, and the computer has a third-party firewall installed
The wireless connection does not work after moving the wireless router or printer
Cannot connect more computers to the wireless printer
The wireless printer loses communication when connected to a VPN
The network does not appear in the wireless networks list
The wireless network is not functioning
Perform a wireless network diagnostic test
Reduce interference on a wireless network
Service mode functions
Secondary service menu
Printer resets
Restore the factory-set defaults
NVRAM initialization
Super NVRAM initialization
Firmware upgrades
Update the firmware using the Firmware Update Utility

Appendix A: Certificates of volatility
Certificate of volatility (M14-M17)
Certificate of volatility (MFP M28-M31)

INDEX

HP LJ LaserJet Pro M14 M17 and LaserJet Pro MFP M28 M31