20204

HP LASERJET4PLUS Manual

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2 How HP LaserJet printers work ENWW
How HP LaserJet printers work
HP LaserJet printers use laser and electrophotographic technologies. To print a page in a
laser printer, the print media must be picked from the input tray one sheet at a time and
transported through the paper path. While passing through the paper path, a scanning
laser beam writes an electrostatic image onto a rotating photosensitive drum. As this
image passes the developing station, a dry, powdery toner is attracted to the image areas.
In an HP color LaserJet printer, this process is similar for each of the four toner colors.
The developed image then advances to the transfer station, where the drum contacts the
paper or other print media and the toner image is electrostatically transferred onto the
paper. After transfer, the print media passes through the fuser, where heat and pressure
are applied and the toner fuses (melts) onto the print media. The print media is then
delivered to the output bin, ready for use.
To summarize, to create the printed image the print media must be transported through the
printer, charged electrostatically, and heated. This is why print media properties such as
cleanliness, electrical resistivity, caliper, finish, moisture content, and stiffness can affect
the print quality and media-handling performance of your HP LaserJet printer.
Alternative sources of information
The media manufacturer and vendor can provide you with information about the suitability
of print media for an HP LaserJet printer.
If you have tried the suggestions that are outlined in this document and in your user guide
and you still need assistance, call the dealer from whom you purchased your printer. You
can also obtain support through the worldwide network of HP Sales and Service Offices.
(See the sales and service listings that are contained in any HP LaserJet printer user
guide.)
Visit HP’s website at http://www.hp.com
to find out more about your HP printer and HP
print media.
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