This video does a good job of explaining
https://youtu.be/R0ZP79UWwso?si=aWj3PidRjOMLR733
If you do not have the alcohol cleaning pen use an first aid kit alcohol wipe
Replacing the Print Head on a Zebra ZD421 / 621 Printer Print
Modified on: Fri, 25 Jul, 2025 at 2:18 PM
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