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Parts Index A-1
Models:
5L
6L
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Troubleshooting
Specification
Install
Parts list
Error codes
Image Formation Block Diagram
Connector Signal Name Remarks
Hardware Error There is an
Warranty
Dimension
Page 180
Image 180
A
Parts Index
Parts Index
A-1
Page 179
Page 181
Page 180
Image 180
Page 179
Page 181
Contents
Page
HP LaserJet 5L HP LaserJet 6L C3941A C3990A
Warranty
Conventions
Here are required statements regarding RFI and laser safety
Chapter Descriptions
List of Figures
Figure B-1 Vcci Statement Japan
List of Tables
Viii
Contents
Product Information
Product Information
Printer Features
Printer Features
Features Descriptions
Paper Capacities and Sizes
Identification
Model and Serial
HP LaserJet 5L Model and Serial Numbers
HP LaserJet 6L Model and Serial Numbers
Specifications
Performance Specifications
Electrical Specifications
Acoustic Emissions
Product Overview
Front/Side Views of the Printer
Front Door Assemblies
Back View of the Printer
Service Approach
Parts Exchange Program
Ordering Parts
Ordering Consumables
Related Documentation
Description
Online Services for
Technical Assistance
Worldwide Support
North American Response Center
Warranty
Warranty Exclusions
Warranty Limitations
Voltage Conversions
Products sold within one country to another country
Regulatory requirements
Product Information
Site Requirements
Site Requirements
Consider the following points before installing the printer
Site Requirements
Operating Environment
Environmental Requirements
Printer Space Requirements Printer Dimensions
Description Dimension
Printer Space Requirements
HP C3906A/F Toner Cartridge
Storage Conditions
Storing Opened Toner Cartridges
Toner Cartridge Handling Suggestions
Toner Cartridge Distribution
Operating Overview
Operating Overview
Using the Control Panel
Control Panel Layout
Indicator Lights 1
When this Indicator
LED Lights
It means this Do this
Indicator Lights 2
Hardware Error There is an
Front Panel Button
Front Panel Button Usage
Function Lights Action Result
Printing a Self-Test
Self-test Page for HP LaserJet 5L
To print a self-test
Self-test Page for HP LaserJet 6L
Continuous Self Test
Printer’s rated speed
Useful for checking and adjusting registration
Refer to Engine Test in for the engine test procedure
Printing an Engine Test
Engine Test Button
Resetting the Printer
To Reset the Printer
Operating Overview
Printer Maintenance
Printer Maintenance
Life Expectancy of Consumables
Life Expectancy of Consumables
Toner Cartridge Life
Saving Toner with EconoMode
Toner cartridge box
Five Percent Text Coverage
Some software applications may refer to this as draft mode
Refilled Toner Cartridges
Recycling Toner Cartridges
Information
Cleaning the Printer
Cleaning Printer Components
Contaminants on the roller can cause print quality problems
Cleaning Printer Components
Cleaning Spilled Toner
Stains into fabric
Functional Overview
Functional Overview
Printer Functional Block Diagram
Basic Printer Functions
DC Controller/Power System
DC Controller Loads
Print Engine Control System
Laser and Scanner Drive
Power System on DC Controller PCA
T e
Functional Overview
Resolution Enhancement REt
Control Panel
EconoMode vs Normal Mode
EconoMode
Memory Enhancement technology MEt
Functional Overview 5
Image Formation Block Diagram
Image Formation System
Drum Cleaning
Toner Cartridge
Drum Conditioning
Image Writing
Image Fusing
Image Developing
Image Transferring
Paper Feed System
Simplified Paper Path
Solenoid and Sensors Solenoid and Photosensors
Name Description
Paper Jam Detection
Refer to Timing Diagram on the next
Basic Sequence of Operation
Printer Timing
Period Timing Purpose
General Timing Diagram HP LaserJet 5L
General Timing Diagram HP LaserJet 6L
Functional Overview
Removal and Replacement
Removal and Replacement
Removal and Replacement Strategy
Removal and Replacement
Installing Memory Cards Dram
MByte card MByte total
Ease of replacement
Covers and Doors
Back Cover
Remove the 3 screws -2, callout
Make certain the Input Extender is up
Back Cover Removal 2
EP Door Assembly
EP Door Assembly Removal
Memory Door
Memory Door Removal
Main Cover and Paper Input Assembly
Main Cover and Paper Input Assembly Removal
Remove the toner cartridge Remove memory door
Without removing the memory door
Internal Assemblies
Control Panel Removal
Exit Roller Assembly
Exit Roller Removal
Delivery Assembly
Delivery Assembly Removal 1
Delivery Assembly Removal 2
Fuser Pressure Plate
Fuser Pressure Plate Removal
Fuser Pressure Plate Replacement
Heating Element
Heating Element Removal 1
Heating Element Removal 2
Make sure the connectors are properly reattached
Lift the Heating Element out
Heating Element Removal 3
Pressure Roller
On the right side of the shaft. Refer to for a part number
Pressure Roller Guide Removal
Face-Up/Face-Down Lever Replacement
Face-Up/Face-Down Lever
Unchanged. -17 shows the lever from an HP LaserJet 5L
Release mechanism
Fuser Exit Roller Assembly
Shows the white tab from an HP LaserJet 5L
Fuser Exit Roller Removal
Reinstalled to exactly this position
Paper Exit Sensor Flag Replacement
Paper Exit Sensor Flag
Laser/Scanner Assembly
Laser/Scanner Assembly Removal
Top Assemblies
Solenoid
Solenoid Removal 1
Only one way
Solenoid Removal 2
Pickup Roller Assembly
Pickup Roller Assembly Removal 1
Pickup Roller Assembly Removal 2
Assembly Figure
Paper Pickup Roller Assembly Replacement Inside/Front View
Paper Feed Frame
Paper Feed Frame Removal 1
Paper Feed Frame Removal 2
Paper Feed Frame Removal 3
Release the sensor unit connector Figure
Paper Feed Frame Removal 4
Transfer Roller Guide & Transfer Roller
Kick Plate
Kick Plate Removal
Kick Plate Spring Replacement
Separation Pad
Separation Pad Removal
Subpads
At the same time
Place your index finger on the subpad
Press toward the top of the printer
Feed Assembly
Feed Assembly Removal 1
Remove the Feed Assembly
Feed Assembly Removal 2
Feed Assembly Removal 3
Bottom Assemblies
Memory Door Guide
Memory Door Guide Removal
Motor
Motor Removal
DC Controller
DC Controller Removal 1
ESD Sensitive
DC Controller Removal 2
DC Controller Removal 3
Formatter PCA
Correct pieces should you need to replace them
Formatter Board Removal
Removal and Replacement
Troubleshooting
Troubleshooting
General Troubleshooting Flowchart
Start
Exit
Paper Path and Components
Paper Path and Components
DC Controller Diagram
Printer Error Troubleshooting
Priority of Errors
∙ Status Messages ∙ Service and Error Messages
Persists
Printer Status Messages
Printer Status Messages 1
LEDs Description Recommended Action
Happens, troubleshoot using -3 below
Unclearable Error
Printer Status Messages 2
Service and Error Messages
Service and Error Messages 1
Beam Error. There are a number of causes
Service and Error Messages 3
Formatter Error
Image Formation Troubleshooting
Check the Toner Cartridge
Oz grams
Image Defect Examples
∙ Replace the DC Controller
Vertical Lines
Character Voids
∙ Your paper may not meet the requirements for the printer
Dropouts
∙ Replace the DC Controller Troubleshooting
Is completely blank. If you get occasional blank pages
White Horizontal Line
Distorted Image or BD Failure
Troubleshooting Checks
Engine Test
Engine Test
Troubleshooting
Drum Rotation Functional Check
High-Voltage Power Supply Check
High-Voltage Power Supply Check
Toner Cartridge High Voltage Connection Points 1
Checks Action
Toner Cartridge High Voltage Connection Points 2
Paper Curl Troubleshooting
Paper Curl
Possible Cause Recommended Action
Troubleshooting Tools
Paper Path Check
Remove the Printer Covers Figures 6-2, 6-3,
Overriding PS204 and SW101
Repetitive Image Defect Ruler
Repetitive Image Defect Ruler
Main Wiring Diagram
Troubleshooting
Connector Signal Name Remarks
Cable Pinouts
Frsth
Troubleshooting
Parts and Diagrams
Parts and Diagrams
How to Use the Part Lists and Diagrams
Parts and cannot be ordered through SMO
Accessories and Supplies
Accessories and Supplies
Product Number Description
Common Hardware
Example Description
Major Assembly Locations
Covers and Doors
Qty Description
Internal Components 1
LaserJet 5L Part No
Internal Components 2
LaserJet 5LPart No
Internal Components 3
Parts and Diagrams
DC Controller/Formatter and Cables
DC Controller Case
Pickup Roller Assembly
Parts and Diagrams
Feed Assembly
Parts and Diagrams
Separation Guide Assembly
Parts and Diagrams
Delivery Assembly
Parts and Diagrams
Parts and Diagrams
Parts Index
Parts Index A-1
Alphabetical Parts List
Parts Index
Parts Index
Parts Index A-3
Index
Parts Index
Parts Index A-5
501/502
Parts Index A-7
Numerical Parts Index
Numerical Parts List
Parts Index A-9
Parts Index
Parts Index A-11
Parts Index
Laser Safety U.S.A
Regulatory Information
Laser Statement Finland
Regulatory Information
Toner Safety
Ozone Emission
Regulatory Information B-3
FCC Statement Class B
Figure B-1
Service Notes C-1
Fuser Accordian Jams
C3941A-01
Service Notes
Solution
Service Notes C-3
Fuser Jam Clearing Countermeasure
C3941A-02A
Service Notes
Index
Index-1
Index-2
Safety
Index-3
Index-4
C3990-90991
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