HP Designjet 4500 Printer series - Manual (Page 215)

Follow these instructions to clean the platen.
1. Unload all paper from the printer.
2. Open the window.
3. With a dry brush, remove ink deposits from the cutter groove.
4. With the same dry brush, remove ink deposits from the platen surface.
5.
At the front panel, select the icon, then Paper handling options > Clean roller > Clean
platen. This command will rotate the small rollers on the platen so that the whole circumference
can be cleaned.
NOTE If you are using the HP Designjet 4000 Printer series, and you find that this
command is not available, please download the latest firmware revision (see Update my
printer's firmware). It will be available from Spring 2006.
ENWW Clean the platen 201
How do I... (printer maintenance topics)