Zebra ZT420 How To Clean The Printhead and Platen

Watch the video below.

Step-By-Step Instructions To Clean The Printhead And Platen On The Zebra ZT420

How to Clean the Printhead (ZT420)

What you need

• Isopropyl alcohol (IPA) 90% or higher)
• Lint-free cloth OR Zebra-approved cleaning swabs
• (Optional) Compressed air for dust

Steps

1. Turn off the printer and unplug the power.
2. Open the printhead assembly (top print mechanism).
3. Remove the ribbon (if using thermal transfer) and media.
4. Use compressed air to blow away loose particles.
5. Moisten a lint-free cloth or cleaning swab with IPA.
6. Gently wipe the printhead from end to end, using a single direction stroke—do not scrub back and forth.
7. Allow the printhead to dry completely (usually < 1 minute).
8. Reinstall ribbon/media and close the printhead.

Tips

• Clean the printhead every time you change a roll of ribbon or after ~2–3 rolls of labels if using direct thermal.
• Excessive pressure can damage the printhead—be gentle.

How to Clean the Platen Roller

What you need

• Same as above: lint-free cloth or cleaning swabs + IPA.

Steps

1. With the printhead open, locate the platen roller (the long black rubber roller under the printhead).
2. Rotate the roller by hand.
3. Apply a small amount of IPA to a cloth/swab.
4. Wipe the roller while slowly rotating it, ensuring the full surface is cleaned.
• Use single-direction wiping motions.
5. Let the roller air dry (1–2 minutes).
6. Check that the roller is free from adhesive, paper dust, or shiny worn spots.

Tips

• If adhesive buildup is heavy, you may need a Zebra-approved adhesive remover wipe before IPA.
• Never use sharp tools or harsh chemicals.

Optional: Sensor & Interior Cleaning

• Use compressed air or a dry swab to remove label dust inside the printer.
• Wipe media guides and paths with IPA lightly if dirty.