Question about Zebra LP 2844 Thermal Printer

2 Answers

Zebra LP2844 not working at all after wrong power supply

I bought a Zebra LP2844 printer from someone on Ebay over a year ago. I ended up not needing it right away so I didn't install it.

Now, I'd like to use it and it just doesn't power up at all. No light at the feed button.

I noticed that the input for it is listed as 20VDC 2.5.

Here's the rub, though. The seller shipped an 808061-001 Eltron power supply. That supply is 16VAC 4A.

So, assuming this printer was working when I got it, what is the likelihood of the printer still being able to function if I get myself a 20VDC power supply after having a 16VAC one plugged into it? Will the higher amperage or the fact that it was AC instead of DC have blown any chance of this thing working?

Is there any way of testing it? I'm beginning to think I should have a general power supply that I can plug things into and change the voltage on it to check things like this. I would have to know how to figure out which wire on one of these round power adapters gets the +/-.

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  • Brian Feb 16, 2009

    Thanks. I guess I'll get a new power supply and replace a fuse and hopefully the board isn't toast.

  • Pedro Weissman Apr 10, 2009


    April 8, 2009
    I have been trying to figure out the same thing. The AC-AC adapter was made for a different printer.

    This is what I am 90 to 99% certain is true about LP2844s.

    1. The LP2844 always has a USB port and always requires +20 V DC power. The AC-AC (16V) adapter powers a different Zebra printer (2543 and 2442) that, for whatever reason, people are selling as LP2844.

    2.If you are using Endicia for Mac, which has a built in driver for LP2844, DO NOT buy something that you do not know for certain is an LP2844, with a USB port, and with firmware version 4.42 or higher installed. You can install the firmware using a PC and a utility available at the Zebra website.

    3. If you have Endicia Mac installed and it "sees" the printer but doesn't print correctly, try going to Printer Setup, entered the letter "N" into "Send Command to Printer", entering and doing this before between each printing.

    4. LP2844s all require +20V DC power. Some people are selling them with laptop adapters and alternates that don't have the right specs. I got one such adapter, an IBM DC 16V adapter. It turns on my (possibly authentic) LP2844 but I have yet to get the printer to work.


    This is what I THINK, but do not know, is true:

    4. People are selling counterfeits, for whatever reason. I think there are tons of non-LP2844s that are not worth as much and people scrape off the label, put a new one on. I think many people are receiving these in bulk and unknowingly received counterfeits. They look almost identical. They appear to function almost identically. I think if you have the right adapter, updated firmware, copied software and a PC, you'd never know the difference.

    5. I THINK the real LP2844 has an "Eltron" sticker on the bottom. If it looks like someone printed "Zebra" blah blah using an inkjet, I think those are fake. The sticker on the front that says "LP2844"....the fake I received has one, but it's too stickery - and the surface beneath appears to have had something more permanent attached at one point. I do not think the real label is a "sticker".

    6. The real LP2844 has a darker "smoky" plastic cover.

    Because I hope to receive a return on one of the printers I bought, I am going to find out a definitive way for people to identify the model of their printer, and I will post that information here and elsewhere. There are a lot of people getting ripped off.


  • Pedro Weissman Apr 10, 2009



    April 8, 2009

    I have been trying to figure out the same thing. The AC-AC adapter was made for a different printer.



    This is what I am 90 to 99% certain is true about LP2844s.



    1. The LP2844 always has a USB port and always requires +20 V DC power.
    The AC-AC (16V) adapter powers a different Zebra printer (2543 and
    2442) that, for whatever reason, people are selling as LP2844.



    2.If you are using Endicia for Mac, which has a built in driver for
    LP2844, DO NOT buy something that you do not know for certain is an
    LP2844, with a USB port, and with firmware version 4.42 or higher
    installed. You can install the firmware using a PC and a utility
    available at the Zebra website.



    3. If you have Endicia Mac installed and it "sees" the printer but
    doesn't print correctly, try going to Printer Setup, entered the letter
    "N" into "Send Command to Printer", entering and doing this before
    between each printing.



    4. LP2844s all require +20V DC power. Some people are selling them with
    laptop adapters and alternates that don't have the right specs. I got
    one such adapter, an IBM DC 16V adapter. It turns on my (possibly
    authentic) LP2844 but I have yet to get the printer to work.





    This is what I THINK, but do not know, is true:



    4. People are selling counterfeits, for whatever reason. I think there
    are tons of non-LP2844s that are not worth as much and people scrape
    off the label, put a new one on. I think many people are receiving
    these in bulk and unknowingly received counterfeits. They look almost
    identical. They appear to function almost identically. I think if you
    have the right adapter, updated firmware, copied software and a PC,
    you'd never know the difference.



    5. I THINK the real LP2844 has an "Eltron" sticker on the bottom. If it
    looks like someone printed "Zebra" blah blah using an inkjet, I think
    those are fake. The sticker on the front that says "LP2844"....the fake
    I received has one, but it's too stickery - and the surface beneath
    appears to have had something more permanent attached at one point. I
    do not think the real label is a "sticker".



    6. The real LP2844 has a darker "smoky" plastic cover.



    Because I hope to receive a return on one of the printers I bought, I
    am going to find out a definitive way for people to identify the model
    of their printer, and I will post that information here and elsewhere.
    There are a lot of people getting ripped off.





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What I learned.
the printers being sold as LP 2844 all over the place is actually an LP 2543. It was made for UPS, specifically, and they are being sold in large lots to refurbishers. It looks almost identical to the LP 2844.
LP2844:  DC 20V 2.5A tip positive; all of them have USB ports!!
LP2543: AC 16V 4A; have only parallel and serial. Cover has a lighter shade to it. Most either have the label scratched off or a fake one put on.

Posted on Apr 10, 2009

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If you plugged in a DC power supply to an AC device, yes this will cause damage. Most cases it will blow a fuse in the printer. AC - Alternating Current meaning it goes back and forth up and down. DC - Direct Current means it stays constant at this level. You may be able to get a proper power supply, change the fuse and all OK but doubts will always remain if the printer doesn't power up.

Posted on Feb 15, 2009

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