General HP LaserJet/DeskJet Printer Maintenance Training Provided by: Ed Quillian For: Harris PC-Technicians/EIT Dept.

Printer Training Overview (LaserJet) Basic Printer Types HP LaserJet HP Laser Jet Color Basic Inside Look at Laser Printer Basic Laser Print Cycle Different Components/Functions of Laser Printer Switches and Safety Devices Possible Service Problems/Troubleshooting/Testing Cleaning and Maintenance Above areas that apply for the DeskJet Printer

Inside Look at the LaserJet Type Printer

Basic Laser Print Cycle

Different Components/Functions of a Laser Printer

Different Components/Functions of a Laser Printer

Different Components/Functions of a Laser Printer Fuser Assembly AC Power Supply Upper and Lower Cooling Fans Printer Gear Motor Assembly High Voltage Power Supply Paper Pickup Roller Assembly Transfer Corona Wire Printer Density Dial Adjustment

Switches and Safety Devices Power On/Off Switch Safety Interlock Switch Bottom Cover Interlock Switch Thermo-protector Switch NOTE: With the outside cover off, there is a possibility of Laser Light being reflected into your eyes, causing blindness. Do not look directly at that area during power-up with the cover off. Only power-up with the cover off for troubleshooting purposes only!!

Possible Service Problems/Troubleshooting/Testing Paper Feeding/Jam Problems Print Quality Problems Fuser Failure Problems Stripped Plastic Gears Problem Troubleshooting (see handout, and web site) Perform Internal Printer System Print Test Perform Internal Engine Print Test Perform External Printer System/OS Print Test Perform a Fusing Check

Possible Service Problems/Troubleshooting/Testing Black Vertical Lines on Paper

Possible Service Problems/Troubleshooting/Testing Repeating Print Across Paper

Possible Service Problems/Troubleshooting/Testing Vertical Smearing of Toner Across Paper

Possible Service Problems/Troubleshooting/Testing Print Characters Are Not Consistence and Uniform

Cleaning and Maintenance Use Only 90% Solution of Isopropyl Alcohol and Lint Free Wipes Check/Clean All Paper Rollers Check/Clean Primary Corona Wire in Toner Cartridge Check/Clean Transfer Corona Wire Check/Clean All Cooling Fans Check/Clean Inside of Printer Area

Basic HP DeskJet Printers

Printer Training Overview (DeskJet) Basic Look at DeskJet Printer Different Components/Functions of DeskJet Printer Disassemble, Switches and Safety Devices Possible Service Problems/Troubleshooting/Testing Cleaning and Maintenance

Basic Look at DeskJet Printers

Different Components/Functions of DeskJet Printer

Different Components/Functions of DeskJet Printer

Different Components/Functions of DeskJet Printer

Different Components/Functions of DeskJet Printer

Different Components/Functions of DeskJet Printer

Disassemble, Switches and Safety Devices

Disassemble, Switches and Safety Devices

Disassemble, Switches and Safety Devices

Possible Service Problems, Troubleshooting, Testing

Possible Service Problems, Troubleshooting, Testing

Possible Service Problems, Troubleshooting, Testing

Possible Service Problems, Troubleshooting, Testing

Cleaning and Maintenance

Printing Web Site on the Intranet EIT Dept. Web Site: (Link to the Ops Manual) http://gcsd.harris.com/engineering/infotech/desktop.html Direct URL to PC-Technician’s Ops Manual: http://gcsd.harris.com/engineering/infotech/nt/procedures/