Question about HP DesignJet 500ps (42 in.) InkJet Printer

3 Answers

Code Error 79:04, 86:01 y 81:01

Hi, Mi HP DesignJet 500 does not work. At first the error were the printheads, it said Error Select Replace Printheads and the black one was marked, but it was stocked to changed them, so we turn it off. Weeks later we continue turning it on and off and the error code changed 3 times this were the error codes 81:01, 86:01 and 79:04. The 3 codes appear one at a time every time we turn it on. Can somebody help me??

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  • crossbow26 Mar 31, 2009

    My client's recently acquired 500PS had a damaged carriage cable. I replaced that, lubed the rails, cleaned the encoder and installed new print heads. Everything tested great and worked for about 4 months. Now the printed page is "blurry" from the right side (bottom margin) for about 8 inches up the page, I replaced the spent Yellow Print head (0303 error) but continued to get the same error – and random 86:01, 79:04 and 74:01 errors.



    A Firmware and Formatter Firmware update fixed the random errors and permitted the plotter to "accept" the new print head for 2 pages – still blurry, then it posted a new error: ”0330 Print head Faulty" which will not clear. I've cleaned the print head contacts, the flex-strip contacts and removed/cleaned the other print heads (as prescribed in the SM).



    Now at every restart the yellow still displays the 0330 error (which is not in the service manual), and the other print heads each display a different "soft" print head error (i.e. out of warranty, expired, empty, etc.) at each startup, or "print head replace" cycle. Only the Yellow and one other print head at a time post errors, but each power/replace cycle posts a different error, or an error for a different print head.



    I'm suspecting either the carriage assembly or formatter board, but not sure which is the most likely culprit.



    Any help would be greatly appreciated.

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79:04: Check the usage and expiry dates on the printheads to start with. Have you refilled them with third-party ink? Even if you have before and haven't gotten this message, your printer might have just picked up on it. Particularily, if you have recently done a firmware upgrade.

Try taking out your printheads and see if it boots up. If it does, then there is a good chance that it's a printhead related issue. Once again, check the expiry dates.

If the error persists, try to re-seat your formatter if you have one.
Try restarting the printer with no printheads or cartridges or media and insert them one by one.

If the error comes up with one specific printhead or cartridge, you may want to replace it, expired or not. And replace it with an HP product designed for your specific printer.

Damage done by third-party products will not be covered by original warranty, or extended.

Final suggestion, is look at the conteacts on the back of the printheads. Are they dirty with ink or grime? What about the contacts in the printer. If they are, I would suggest using a SLIGHTLY damp coffee filter and gently wiping up and down until they are clean. DO NOT wipe horizontally or in circles. It may cause scratches to the contacts which could further damage them. Wipe them vertically with a DRY coffee filter, or allow them to completely air dry before re-inserting them. Before you re-insert them, reboot the printer with nothing in it, and insert them one by one.

For any further assistance, I suggest phoning HP Technical Support.

1-800-474-6836

Best of luck.

Posted on Dec 15, 2008

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Hi have hp z2100 when the plotter go to cut the paper to the left is stock befor go to cut the paper

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