HP Design Jet 800 Plotter Printer: Declogging

A clogged print head may look like streaks, or one color may print correctly for a while and then just stop.

The plotter may go through all of the motions and just not print anything at all.

If the print head is not moving, that is a separate issue.

There are 4 print heads, one for each color ink that the printer uses.

Go to the screen on the printer

Menu > Ink > Replace Print Head. Press enter.

The plotter will pull all of the print heads over so they are accessible.

Following the instructions on the machine, pull out any that are clogged. They are each labeled with the color ink that they print.

Line the bottom of a water-proof container with wet papertowel.

Place the print heads ink-side down on the wet paper towel.

Wait 5 minutes.

Gently wipe off the print head.

Replace the print heads in the machine.

Test the results by printing something using the colors that were clogged.

If they still seem clogged, repeat steps 2-4 until resolved.