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Zebra GX420t Label Printer Solution Guide

Solutions for common printing issues of the Zebra 420t

Labels are not printing

If your Zebra printer is not printing, perform the following steps to calibrate your printer.

  1. Press and hold the feed button.
  2. Hold the feed button for 7 flashes of the status light.
  3. Release feed button after the 7th flash.

The printer will begin to print out several labels while it automatically re-calibrates; once the printer stops, calibration is complete.

Labels are printing too light

If labels are printing too light you can adjust the darkness setting.

  1. Press and hold the feed button.
  2. Hold the feed button for 6 flashes of the status light.
  3. Release the feed button after the 6th flash, the printer will begin to print out labels that progressively get darker.
  4. Press the feed button once the pattern is clear and legible (If the setting do not darken your label, replace the toner roll).

Label size is printing incorrectly

  1. Press and hold the feed button.
  2. Hold the feed button for 5 flashes of the status light.
  3. Release the feed button after the 6th flash, the printer will being to progressively print larger label outlines.
  4. Press the feed button once the print outline is the appropriate size for your label.


KeywordsLabel Printer Zebra 420t   Doc ID101487
OwnerMartin B.GroupUI College of Veterinary Medicine
Created2020-04-27 15:12:55Updated2023-06-01 09:30:22
SitesUniversity of Illinois College of Veterinary Medicine
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