Page
Page
 HP LaserJet 3100/3150 Product
 Copyright Information
Warranty
 Contents
 Functional overview
 Troubleshooting
 Parts and diagrams
 Figures
Contents-7
 Fuser pressure plate removal 114
Page
Page
 Tables
Contents-11
Page
 Product Information
Chapter contents
 Introduction
 Product features Feature Description
Product features
 Performance specifications Category Specification
Product specifications
Physical specifications Category Specification
 Skew specifications
Power specifications Category Specification
Operating acoustical emissions per ISO 9296 specifications
 Model number C4256A
Model and serial numbers
Model number C3948A
 Document scanner path
Product overview
 Printer path 1
 Printer path 2
 Rear view
 Laser safety statement
Safety
Regulatory information
Transportation
 Luokan 1 laserlaite Klass 1 Laser Apparat
Laser statement for Finland
Varoitus
Varning
 FCC part 68 requirements
FCC regulations
 RJ11C
 Telephone consumer protection act U.S
 IC CS-03 requirements
 Declaration of conformity
Conforms to the following Product Specifications
 Environmental product stewardship program
Canadian DOC regulations
Protecting the environment
This HP LaserJet printer design eliminates Ozone production
 HP LaserJet Printing Supplies
Toner consumption
Paper use
 Paper
 Spare parts and consumables availability
 Material safety data sheet
 Installation and operation
 Environmental requirements Category Requirement
Operating environment
 Output capacities
Media requirements
Input for document feeder tray for document scanner path
 Storage conditions
Toner cartridge information
Storing opened toner cartridges
Toner Recycling
 Control panel layout
Control panel
 Control panel messages Message Cause
Control panel messages
 From Scanner
Clear Document
 Communication Error
Control panel messages Message Cause Solution
 Config. Tied Addr
Configuration
Decoding Error #
Encoding Error
 Fax Memory Error
Lost Power failure
Fax Document was
#number
 Memory Full Send
Modem Error #
Unscanned Pages
Memory is Full
 No Memory for
When nothing was in memory
Report
Erase/Print
 Paper Bin is Empty
Password must be
Please Add Paper
Digits
 Printer Comm Error
Polling-In Error
Or No Cartridge Cartridge is not installed properly
Printer Cover Open
 Call for Service Problem has occurred with the print Engine
Printer Laser Error
Printer Motor Error
Call for Service Engine
 Redial Failed
Error
Remote Fax was
Busy Scan Reference
 Speed Dial number
System Error
Is not Assigned
Memory Had been received to memory
 To print a menu tree
Menu tree
 Menu tree for the HP LaserJet 3100 product
 Menu tree for the HP LaserJet 3150 product
 Maintenance
 Life expectancies of consumables
Life expectancies of consumables
 Cleaning and maintaining the equipment
 Cleaning the document scanner path
Page
 Cleaning the print path
Page
Page
 To use a cleaning
Using a cleaning
Page
 Functional overview
 Basic functions
Basic configuration
 Printer functions
Printer unit functional block diagram
 ECU loads
ECU/power system
 Print engine control system
 AC power distribution
Power system on ECU
DC power distribution
DC power distribution
 High-voltage power supply circuit
High-voltage power distribution
 Central processing unit
Formatter system
Memory
Read-only memory ROM
 Random-access memory RAM
Draft mode
Parallel interface
Control panel
 Toner cartridge
Image formation system
 Developing
Primary charging
Scanning exposure
 Transferring
Drum cleaning
Separating
Fixing stage
 Printer feed system
 9 10 11
 Paper jam detection
 Solenoid, photosensors, and switches
Solenoid, photosensors, and switches
 Document scanner system
 Simplified document path
 Timing Period Purpose Remarks
Basic sequence of operation formatter-to-printer
 General timing diagram
 Removal and replacement
 Removal and replacement strategy
 Required tools
Before performing service
After completing service
 Back cover
Covers
 Back cover removal 2
To reinstall
 Right side cover removal
Right side cover
 Left side cover removal
Left side cover
 Left front cover removal
Left front cover
 Top cover removal
Top cover
 RFI shield removal
RFI shield
 Printer door
Document scanner assemblies
 Printer door removal 2
 Printer door removal 3
 Document release door removal 1
Document release door
 Document release door removal 2
 Upper guide assembly removal 1
Upper guide assembly
 Upper guide assembly removal 2
 Contact image sensor removal 1
Contact image sensor
 Contact image sensor removal 2
 Document scanner assembly/motor removal 1
Document scanner assembly/motor
 Document scanner assembly/motor removal 2
 Document scanner pickup roller removal
Document scanner pickup roller
 LIU board
Internal assemblies
 Formatter board removal 1
Formatter board
 Formatter board removal 2
 Metal side plate removal
Metal side plate
 Exit roller removal
Exit roller
 Delivery assembly removal 1
Delivery assembly
 Delivery assembly removal 2
 Fuser pressure plate removal
Fuser pressure plate
 Fuser pressure plate replacement
 Front casing removal
Front casing
 Heating element removal 1
Heating element
 Heating element removal 2
 Pressure roller guide removal
Pressure roller
 Able to feel the spring’s release mechanism
Face-up/face-down lever
 Fuser exit roller assembly removal
Fuser exit roller assembly
 Paper exit sensor flag
Paper exit sensor flag replacement
 Laser/scanner assembly removal
Laser/scanner assembly
 Solenoid removal 1
Solenoid
 Solenoid removal 2
 Pickup roller assembly removal 1
Pickup roller assembly
 Pickup roller assembly removal 2
 Paper pickup roller assembly replacement
 Paper feed frame removal 1
Paper feed frame
 Paper feed frame removal 2
 Paper feed frame removal 3
 Transfer roller guide and transfer roller removal
Transfer roller guide and transfer roller
 Kick plate removal
Kick plate
 Kick plate spring replacement
 Separation pad removal
Separation pad
 Subpad removal
Subpads
 Feed assembly removal 1
Feed assembly
 Feed assembly removal 2
 Feed assembly removal 3
 Cable guide
Bottom assemblies
 Motor removal
Main Motor
 ECU
 ECU removal 2
 ECU removal 3
 ECU removal 4
 Feet removal
Feet
 Troubleshooting
 Is Power On successful?
Basic troubleshooting
Verification steps Possible problems Solutions
 Reports print?
Is the product ready?
Do engine tests and internal
 Does the product send a fax?
Is the copy function operational?
 Does the product receive a fax?
Is the software installed correctly?
Does the product print from
Computer?
 Decoding Error
Error messages
Message Cause
#number Image processing chip
 No Modem Installed
 If neither of these solutions works, replace the formatter
 Error LaserJet 3100/3150 product
Call for Service Damaged
 Servicing
 To redistribute toner in the cartridge
Image formation troubleshooting
Check the toner cartridge
 Problem Cause
Solving image quality problems
Parts of the page around the edges aren’t printing
Images will not
 Or print is not faded, but vertical white stripes appear on
 Horizontally
Aligned black Installed Streaks or smears Appear
 Shadows or Repetitive marks Appear on
Light character
Character voids
Solid black Paper
 Characters are
Completely black
Only partially Printed also
Referred to as Dropouts
 Print is misaligned on the page skewed pages
Always printing Installed
Blank pages are
 Clear
Scanned text is not
Scanned images
Print at a reduced Image Size
 Pages are coming
Solving paper feed problems
Long pages stop
Feeding through
 Scanned items are
Crooked Adjusted properly
 Paper guides are not adjusted properly
 Tray fall forward out
 Not install a driver Windows will not prompt
Solving general software problems
 Not connected to your computer
Software did not install Windows 95, 98, or NT4.0
 Is securely connected
 All in One on
Your HP LaserJet
Network
Find an All in One at
 To perform the simple hardware test
Functional checks
Simple hardware test
 To print an engine test
Engine test
Engine test button location
 Internal reports
To print a configuration report
To run a self-test and print a self-test report
To print a demonstration
 To print all reports at once
Printing all reports at once
 Half-self test functional check
 Drum rotation functional check
 Heating element check
 Checking the toner cartridge connection points
High-voltage power supply check
 Paper curl
Checking the high-voltage connector assembly
 To override SW101
Paper path check
 Paper path and components
Troubleshooting tools
 Document path and components
Document path and components
 Repetitive image defect ruler
Repetitive image defect ruler
 Document scanner recalibration
Pressing VOLUME+CONTRAST
 Press once to display Service and press ENTER/MENU
 General circuit diagram 1
Main wiring
 General circuit diagram 2
 Control panel service menu
Service menus
Tests in control panel service mode
Control panel service menu
 Extended service menu
 Control panel can
Extended service menu tree
 Fax memory test #1 Program test #1
Self-test in extended service mode
 Extended service mode tests Test Explanation
Other tests in extended service mode
 Extended service mode reports Report Explanation
Reports in extended service mode
 Clear memory in extended service mode
 To change the country code softswitch
Softswitches
 Press Stop/Clear
Country/region code softswitch sequences
 Firmware and software downloads
 Hardware, software, and firmware compatibility
Hardware, software, and firmware compatibility
 Translating the fax trace report
Fax trace report
 Sequence Calling station Called station
Fax phase sequence
 Appropriate responses
Commands Comments Appropriate responses
 Fax abbreviations
Abbreviation Function Signal format X= any #
 MSG
 Example of a successfully sent fax
 Example of a successfully received fax
Explanation of DBM
 Troubleshooting
 Parts and diagrams
 Ordering parts
How to use the parts lists and diagrams
 Consumables and accessories Product number Description
Consumables and accessories
 Power cable- Hong Kong SAR
 Ordering consumables
 Common fasteners ExampleDescription
Common hardware
 Major assembly locations
 Supports
 Supports Reference Part number Description
 External covers and panels
 External covers and panels Reference Part number Description
 Printer door 1
 Printer door 1 Reference Part number Description
 Printer door 2
 Printer door 2 Reference Part number Description
 Document scanner assembly
 Document scanner assembly Reference Part number Description
 Internal components 1
 Internal components 1 Reference Part number Description
 Internal components 2
 Internal components 2 Reference Part number Description
 Internal components 3
 Internal components 3 Reference Part number Description
 Electrical components assembly
 Common hardware
 Paper pickup assembly
 Paper pickup assembly Reference Part number Description
 Feed assembly
 Feeder assembly Reference Part number Description
 Separation guide assembly
 Separation guide assembly Reference Part number Description
 Delivery assembly
 Delivery assembly Reference Part number Description
 Alphabetical parts list Part name Part number
Alphabetical parts list
 Alphabetical parts list
 Figure # Reference
 Figure # Reference
 Figure # Reference
 Figure # Reference
 Figure # Reference
 Numerical parts list Part number Part name
Numerical parts list
 Figure # Reference
 Paper path lever-LJ 3150 darker in color
 Figure # Reference
 Cable, grounding, document scanner motor
 Figure # Reference
 When to replace the document scanner separation pad
Document scanner separation pad replacement
 Document scanner separation pad replacement
How to replace the document scanner separation pad
 Index
Index
 Index
 Index
 Index
 Index
 Index
 Index
 Index
 Index
 Index
 Index
 Index
Page
 Manual Part No. C4256-90954