Calibration Procedure:

  1. Hold down the button on top of the printer (Feed button) until the green light flashes 2 times, then release.
  2. The printer will feed one to four labels while calibrating, detect and set media type and media length, and adjust the media sensors for optimal performance with the installed media.


Manual Calibration Procedure:

  1. Press and hold the Feed button until the green status light flashes 7 times, then release.
  2. The printer will set the media sensor for the label backing being used. After it is done making this adjustment, the roll will automatically feed until a label is positioned at the printhead and a profile of the media sensor settings will print.
  3. Upon completion, the printer will save the new settings in memory and the printer is ready for normal operation.
  4. Press the Feed button. One entire blank label will feed. If this does not happen, try defaulting the printer (hold the Feed button until it flashes four times) and re-calibrate the printer.
  5. Note - A manual calibration disables the auto calibration function (so a manual calibration will need to be changed if you change label size), default the printer to return to auto calibration.


Manually Set Print Width Adjustment:

  1. Hold down the Feed button until the green status light flashes 5 times, then release.
  2. The printer will print a succession of boxes starting at the minimum print width and ending in the printer’s maximum print width in 4mm increments. Press the Feed button once when the printer has reached the desired maximum print width.



Manually Change Saved Printer Settings Using a Computer (WIFI):

  1. If you know the printer's IP address, skip step 2.
  2. Hold down the Feed button until the green status light flashes 1 time, then release.
  3. A list of information will print, find the IP Address listed on the first page under the heading Network Configuration [This will be a set of numbers similar to 010.100.000.001].
  4. Find a computer that uses the same router, open a web browser (i.e. Chrome, Firefox, etc), and enter the IP Address without the leading zeros in the address bar [Using the earlier example, enter 10.100.0.1].
  5. Click on "View and Modify Printer Settings".
  6. If you are asked to enter a password, the default password is 1234.
  7. Click on "Media Setup".
  8. Enter 609 in the "Print Width" box.
  9. Enter 424 in the "Maximum Length" box.
  10. Click "Submit Changes" to save the settings to temporary memory.
  11. When the new page loads, click on "View and Modify Printer Settings".
  12. Click on the "Save Current Configuration" button to save the changes.

 

Manually Change Saved Printer Settings Using a Computer (USB Connect Printer or WIFI):

  1. Download the Zebra Setup Utilities by visiting https://www.zebra.com/us/en/support-downloads/printers/desktop/gk420d.html#mainpartabscontainer_ce8a=software.
    1. Click on "Software & Utilities" in the middle of the page.
    2. Scroll down the page and click on the download link to the right of "Zebra Setup Utilities".
  2. Click on "Configure Printer Settings".
    1. Ensure that "Units" is set to Inch, then set "Width" to 3 and "Height" to 2.
    2. Click "Finish" at the bottom-right.


If you are still having issues with the printer, the printhead of your printer may be damaged and in need of replacement. Zebra has excellent customer service and we recommend discussing the issue further with their team. The customer service phone number for Zebra is (877) 275-9327.