Question

Photo of Jon Cashatt

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Zebra GX420D Errors after one label

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Hi Everyone,

I hope this is the right place to ask this. I'm pulling my hair out with this problem. We're currently setting up our Check-in system and everything is working great except for our Zebra GX420D errors out (flashing red light) after it prints one label. It sometimes says it's out of paper other times it just says it's in an error state. I've reset the printer configuration and calibrated it dozens of times. When I print out a configuration settings label it's all configured correctly. One other issue I think may be related is that even after doing a calibration it still doesn't print completely on the label (it's always too high or too low—but never by the same amount). I'm wondering if the sensor is the issue. The printer was donated and may have been damaged (it's supposed to be in perfect working order—but who knows).

Any help would be greatly appreciated.  

  • Photo of James Temens

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    Jon, we had the exact same issue and it was a bad power supply.

    • Aaron Hackett

      Aaron Hackett

      Read this after fighting for hours with my Zebra GX 420D. This was exactly the issue. I bought a used one off of Amazon, came with a generic Power supply. Swapped it out with a Zebra brand for the GX/GK series and all labels printed perfect. Thank You!

    • Photo of Daniel Hazelbaker

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      Hi Jon,

      It does sound like it might be a hardware issue. I would try a couple things.

      1) Do a factory reset on the printer and try printing again, see if the problem persists.

      2) Do a factory reset on the printer and then try printing the config label (hold down the feed button until it blinks once then release). The config label usually takes 3-4 labels for us. If the config label prints, but then it stops printing after printing from Rock, you might have some invalid ZPL data in your labels that is causing issues.

      3) If you have another GX420D that is working, try swapping the power supplies and see if it is a power supply issue.

    • Photo of Lee Peterson

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      You can print a graph of the paper sensor output by putting `~JG` in a label. You'll have to turn the printer off once it prints to make it stop. The graph should show the gaps between labels. If it's not indicating gaps then either the sensor light path is blocked or the sensor is bad.

      Screen Shot 2018-10-08 at 11.38.39 AM.png

    • Photo of Jon Cashatt

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      Thanks for the help I did everything you suggested and it does seem to be the printer.

      I guess we'll be buying a new GX420d. Does any one have a recommendation of where to buy them (Like I said this one was donated).

      Thanks for the help,

      Jon

      • Paul Tedder

        Paul Tedder

        I agree with Daniel. There prices are the best I've seen. However I would also recommend Tom Templin with ciber.com -- his zebra pricing is really good and they also have a team who may be able to answer your question. I don't have his email but their website is ciber.com

      • Photo of Darrin Graham

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        Jon. I have a couple of those I can send you if you want to pay shipping. Hit me up if you're interested. We bought them and then replaced them with the cutter model.