User Manual

Maintenance
243
Cleaning the Printhead
Always use a new cleaning pen on the printhead (an old pen carries contaminants from its previous use
that may damage the printhead).
When you load new media, you should clean the printhead for optimal print operations.
CAUTION—HOT SURFACE: The printhead becomes hot while printing. To protect from damaging the
printhead and risk of personal injury, avoid touching the printhead. Only use the cleaning pen to perform
printhead maintenance.
CAUTION—ESD: The discharge of electrostatic energy that accumulates on the surface of the human
body or other surfaces can damage or destroy the printhead and other electronic components used in this
device. You must observe static-safe procedures when working with the printhead or the electronic
components under the top cover.
ZD621 / ZD421 Direct Thermal Printers
When you load new media, you can also clean the printhead.
1. Rub the cleaning pen across the dark area of the printhead. Clean from the middle to the outside. This
will move adhesive transferred from the edges of media to the outside of media path.
2. Wait one minute before closing the printer to allow the components to dry.