Question about Zebra GK420 Thermal Printer

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Hi there i would like to know whether is there

Hi there i would like to know whether is there any possibility of printing on flat labels (not on roll) from Zebra Gk420t. I think it should not be possible, because the place where we insert hte media takes on ROLL only. Quick help appreciaed! thanks Abbas

Posted by contactabbas on


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Michael OGrady

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You can use FAN-Fold Labels with the GK420 Printer. If you look at the back of the printer you should see a slot where you can feed the labels into the printer.

Hope that helps.

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Posted on Feb 22, 2011


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Zebra GK420T Red light keep flashing

Seems its loosing calibration, try to reset to factory defult setting and it will calibrate with the labels that have at the moment. Please check settings at windows drivers (should be set up at Thermal transfere if using ribbon otherwise Direct Thermal if not using ribbon.
That issue can happen aswell if when sending a job to the printer with wrong settings, it will overrwrithe the previose settings of the printer.
you can untick the setting " use printer settings" at drivers as well.
if you need diferent driver go to - this driver let you to resett printer to factury defaults. Hope it helps.Paulo.

Apr 03, 2014 | Zebra GK420t thermal transfer and thermal...

1 Answer


When I have that problem with my GK420t, it seems that the font needs to be changed. Try switching to one of the other "Zebra" fonts.

Mar 03, 2014 | Zebra GK420 Thermal Printer

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Hi, when I try to print to a networked GK420t, it prints the first page then feeds two and a half labels and then flashes a red light. At which stage it completely loses network - pings time out.

The problem that you are facing can be resolved by doing a reset on the printer and then setup the printer on the network again. This will resolve the issue.

Jul 05, 2011 | Zebra GK420t thermal transfer and thermal...

1 Answer

When i try print the output at the to test whether the ink is function or not

I'm including this link to the users manual:

But here is the basic troubleshooting info for that issue

No print on the label.The media may not be direct thermal media when printing without ribbon (i.e. thermal
transfer). See the test procedure

Determining Thermal Media Types on page 29.
• For thermal transfer printers, the media may not be outside wound or approved for use in
the G-Series printer. See the following ribbon test procedures: Ribbon Test with Adhesive
on page 32

and Ribbon Scratch Test on page 33.
• Is the media loaded correctly? Follow the instructions for

Loading Roll Media on page 11
in the Getting Started section. For printing using transfer ribbon, see

Loading Transfer Ribbon
on page 14.

Mar 28, 2011 | Zebra GK420t thermal transfer and thermal...

1 Answer

I have a GK420t Zebra Thermal transfer printer that prints the test print perfect but when connect to mainframe and start printing from mainframe system the print is upside down. The top of print is on the...

You need to add the ^POI or ^PON command to your format on your host system. Look it up in the manual to see which is right for your app.

You could also get labels that are wound the other way on the roll. Inner wound vs. outer wound.

Jan 05, 2010 | Zebra GK420t thermal transfer and thermal...

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