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HP LaserJet 5L/6L printer series service manual

C3990A Service Manual View Service Manual

Table of Contents

Product information
Chapter contents
Printer features
HP LaserJet 6L Gold
Model and serial
Product overview
Service approach
Contacting HP to place an order
Ordering parts
Ordering related documentation
Parts Exchange Program
Technical assistance
HP Customer Care
HP worldwide sales and service offices
Hardware service after the warranty period
Hardware service during the warranty period
HP LaserJet Toner Cartridge warranty
Voltage conversions
Site requirements
Chapter contents
Site requirements
Operating environment
Printer space requirements
The HP C3906A/F Toner Cartridge
Storage conditions
Storing opened toner cartridges
Toner cartridge handling suggestions
Operating overview
Chapter contents
Using the Control Panel
Control Panel layout
Indicator lights
The Control Panel Button
Printing a self-test page
Printing an engine test
Continuous self test
Resetting the printer
To reset the printer
Printer maintenance
Chapter contents
Life expectancy of consumables
Toner cartridge life
Saving toner with EconoMode
Recycling toner cartridges
Refilled toner cartridges
Cleaning the printer
Cleaning printer components
Cleaning spilled toner
Functional overview
Chapter contents
Basic printer functions
DC Controller/power system
Power system (on DC Controller PCA)
Print engine control system
Formatter system
Control Panel
Parallel interface
Random access memory (RAM)
Read only memory (ROM)
Enhanced I/O
Memory Enhancement technology (MEt)
Resolution Enhancement technology (REt)
Page Protect
PJL overview
Image formation system
Toner cartridge
Step 1: Drum cleaning
Step 2: Drum conditioning
Step 3: Image writing
Step 4: Image developing
Step 5: Image transferring
Step 6: Image fusing
Paper feed system
Paper jam detection
Basic sequence of operation
Removal and replacement
Chapter contents
Removal and replacement strategy
Required tools
Installing memory cards (DRAM)
Covers and doors
Back Cover
EP Door Assembly
Memory Door
Main Cover and Paper Input Assembly
Internal assemblies
Control Panel
Exit Roller Assembly
Delivery Assembly
Fuser Pressure Plate
Heating Element
Pressure Roller
Face-Up/Face-Down Lever
Fuser Exit Roller Assembly
Paper Exit Sensor Flag
Top assemblies
Laser/Scanner Assembly
Pickup Roller Assembly
Paper Feed Frame
Transfer Roller Guide and Transfer Roller
Kick Plate
Separation Pad
Feed Assembly
Bottom assemblies
Memory Door Guide
DC Controller
Formatter PCA
Chapter contents
General troubleshooting flowchart
Paper path and components
DC Controller diagram
Printer error troubleshooting
Priority of errors
Printer status messages
Service and error messages
Image formation troubleshooting
Check the toner cartridge
Image defect examples
Troubleshooting checks
Engine test
Drum rotation functional check
Half self-test functional check
High-voltage power supply check
Paper curl
Troubleshooting tools
Paper path check
Repetitive image defect ruler
Main wiring diagram
Parts and diagrams
Chapter contents
How to use the part lists and diagrams
Ordering consumables
Ordering parts
Accessories and supplies
Common hardware
Parts diagrams
Parts index
Alphabetical parts list
Numerical parts list
Regulatory information
Laser Safety (U.S.)
Laser Statement (Finland)
Ozone emission
Toner safety
FCC Statement (Class B)
VCCI Statement (Japan)

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