LaserJet 4100 Printer Service Manual
This manual contains the necessary information to service the LaserJet 4100 Printer Contents: 1 Product information
Printer features
Product compatibility matrix
Identification
Model and serial numbers
Site requirements
Installation requirements
Environmental requirements
Print media specifications
Supported types of print media
Types of print media to avoid
Weight equivalence table
Adhesive labels
Overhead transparencies
Envelopes
Card stock and heavy paper
Safety information
Toner safety
Laser safety
Regulatory information
2 Service approach
Service approach
Parts and supplies
Ordering information
Printer documentation
HP direct ordering for genuine HP parts
Exchange program
Consumables
World Wide Web
HP service parts information compact disc
HP support assistant compact disc
Toner cartridge information
Warranty statement
Printer warranty
Limited warranty for toner cartridge life
3 Printer operation
Using the control panel
Control panel layout
Control panel lights
Control panel keys
Settings and defaults
Control panel menus
Quick copy jobs menu
Private/stored jobs menu
Information menu
Paper-handling menu
Printing menu
Print quality menu
Configuration menu
I/O menu
EIO menu (networked printers)
Resets menu
Service mode
Service menu
Page count
Maintenance count
Maintenance interval
Serial number
Cold reset paper
Diagnostics
Clear event log
Top margin
Tray 1 left margin
Trays 2 and 3 left margin
Testing the printer
Engine test
Resetting the printer
Cold reset
Clearing NVRAM
Initialization of NVRAM
Initialization of the hard disk
System configuration
MS-DOS system configuration
Parallel DOS commands
4 Printer maintenance
Cleaning the printer and accessories
Using the printer cleaning page
Using the auto-cleaning page
Cleaning spilled toner
Performing printer maintenance
Reset maintenance count
Expected life of components
5 Theory of operation
Power supply system
AC/DC power distribution
Overcurrent/overvoltage protection
Fuser over-temperature protection
High-voltage power distribution
Toner-cartridge detection
Cartridge memory
Engine controller system
Engine controller board inputs and outputs
Laser/scanner drive
Paper-motion monitoring and control
Solenoids, sensors, clutches, and switches
Engine test print
Motors
Formatter system
PowerSave
Resolution Enhancement technology
EconoMode
Input/output
CPU
Printer memory
DIMM slots
PJL overview
PML
Control panel
Image formation system
Toner cartridge
Photosensitive drum
Writing the image
Developing the image
Transferring the image
Image fusing/variable fusing temperature
Paper feed system
Clutches and sensors
Printing from tray
Printing from tray
Printing from the optional 500-sheet tray
Envelope feeder
Duplexer
Jams
Other controls
Environmental detection
Basic sequence of operation
6 Removing and replacing parts
Removal and replacement strategy
Required tools
Tools
Other helpful tools
Removing covers
Rear right side cover
Control panel
Top cover
Left side cover
Front right side cover
Rear cover/rear output bin
Tray 1
Removing internal assemblies
Fuser
Firmware DIMM
Formatter assembly
Output delivery assembly
Laser/scanner
Cartridge memory
Fan
Main motor
Transfer roller
Tray 1 pickup roller
Tray 1 pickup assembly
Right side toner cartridge guide
Registration assembly
Paper feed assembly
Printer drive assembly (gear train)
Delivery drive assembly
Separating the engine module from the paper-feed module
Engine controller board
Paper-feed guide assembly
Removing tray assemblies
Paper-feed rollers for trays 2, 3, and 4
Separation rollers for trays 2, 3, and 4
Tray 2 paper-feed module disassembly
Tray 3 and 4 paper-feed module disassembly
7 Troubleshooting
Troubleshooting process
Troubleshooting flowchart
Troubleshooting flowchart (continued)
Troubleshooting the printing system
Preliminary operating checks
Power on
Engine test
Display
Event log
Printer messages
General paper-path troubleshooting
Information pages
Image quality
Image system troubleshooting
Reference diagrams
Locations of components
Paper path
Engine controller board
Paper-size detection switches
Motors and fans
Connectors
PCAs
Sensors, switches, and thermistors
Solenoids and clutch
Timing
8 Parts and diagrams
How to use the parts lists and diagrams
Accessories and supplies
Common screws and replacement cables
Illustrations and parts lists
Alphabetical parts list
Numerical parts list
Index FORMAT: Scanned Copy
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