HP DesignJet 500 - Manual (Page 231)

Media & Ink Introduction Front-Panel Other Index Solutions
Printer
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Maintaining the Printer Specifications Ordering Accessories Online Help Glossary
5. Take a new lens cover from inside the window of
the printer, lens covers are also available from the
User Maintenance Kit .
6. Making sure that you do not touch the glass
portion of the lens cover, install the new lens cover
into the slot. Make sure the lens cover is firmly in
place.
7. Close the printer window and press the Enter key.
NOTE: If the “Lens Maintenance Advised” message is
displayed after you have replaced the lens cover with a
new one, contact your HP representative.