HP DesignJet 1050c Color problem

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  • Laka
    Technician
    • Nov 2015
    • 36

    HP DesignJet 1050c Color problem

    What is the problem...!
    We have av "old" 1050c that have working perfect for the last 10 years (!) and now,
    on testprint, it's only b/w on the head test but color on next part of the test page
    and when a send file to the printer it's also b/w that prints...!
    IMG_3497_s.jpg.
    Left the current one, and right the old one that's ok..!??
    Have tried to read service manual, ... could it be Drop detector ...?
    All heads ok!
    /Lars
  • Kiran Otter
    Service Manager

    Site Contributor
    1,000+ Posts
    • Dec 2013
    • 1098

    #2
    Re: HP DesignJet 1050c Color problem

    I've never seen that before. When you run the test print, did you have 'color' selected on the front panel? That's about the only time when that button does anything; when printing internal prints. I don't know if it would cause that effect though.

    For it to be happening when you send a print is even stranger. What are you printing from? And what driver? Did anything change?

    It's not the drop detector.

    Kiran

    Comment

    • blackcat4866
      Master Of The Obvious

      Site Contributor
      10,000+ Posts
      • Jul 2007
      • 22781

      #3
      Re: HP DesignJet 1050c Color problem

      Just out of curiosity, how did you decide that the heads are OK? =^..^=
      If you'd like a serious answer to your request:
      1) demonstrate that you've read the manual
      2) demonstrate that you made some attempt to fix it.
      3) if you're going to ask about jams include the jam code.
      4) if you're going to ask about an error code include the error code.
      5) You are the person onsite. Only you can make observations.

      blackcat: Master Of The Obvious =^..^=

      Comment

      • Kiran Otter
        Service Manager

        Site Contributor
        1,000+ Posts
        • Dec 2013
        • 1098

        #4
        Re: HP DesignJet 1050c Color problem

        Originally posted by blackcat4866
        Just out of curiosity, how did you decide that the heads are OK? =^..^=
        Part 3 (the color bars) of the print come out correctly, so I'd agree the heads are OK. Just my two cents!

        Kiran

        Comment

        • D Hook
          Trusted Tech

          100+ Posts
          • Mar 2018
          • 205

          #5
          Re: HP DesignJet 1050c Color problem

          Originally posted by Kiran Otter
          I've never seen that before. When you run the test print, did you have 'color' selected on the front panel? That's about the only time when that button does anything; when printing internal prints. I don't know if it would cause that effect though.

          For it to be happening when you send a print is even stranger. What are you printing from? And what driver? Did anything change?

          It's not the drop detector.

          Kiran
          That's an internal print in the Image Quality menu. I had the same problem a few years ago. I honestly don't recall exactly what it was but I'll take a look today at my 1055CM and see if I can recreate the problem. I do know it's just a menu button push problem, not an ink supply or mechanical issue.

          Comment

          • Laka
            Technician
            • Nov 2015
            • 36

            #6
            Re: HP DesignJet 1050c Color problem

            Thanks for the reply!
            This problem occurred after I used loose sheets for a job and after that the problem occurred!
            Tried changing a head (C) and it's still the same problem!
            Must be an internal problem in the printer (!?) because I do an internal print in the printer test menu ..?
            Regards
            Lars

            Comment

            • Laka
              Technician
              • Nov 2015
              • 36

              #7
              Re: HP DesignJet 1050c Color problem

              Originally posted by D Hook
              That's an internal print in the Image Quality menu. I had the same problem a few years ago. I honestly don't recall exactly what it was but I'll take a look today at my 1055CM and see if I can recreate the problem. I do know it's just a menu button push problem, not an ink supply or mechanical issue.
              Hi!
              Have you had time to check what was possibly wrong with your printer?
              Regards
              Lars

              Comment

              • D Hook
                Trusted Tech

                100+ Posts
                • Mar 2018
                • 205

                #8
                Re: HP DesignJet 1050c Color problem

                Kiran nailed it. Checked it just now (sorry for the delay) and on the front panel, to the left of the display, you have a button that says "Color"/Grayscale". Be sure this is set to "Color". I just now set mine to "Grayscale" and got the same result you posted a picture of. When this happened to me awhile back I completely overlooked that button. I was doing some work on the printer and must've inadvertently set it to "Grayscale". Soon as I switched it to "Color" it started to print the Quality Image in color again.

                Hope that works for you. Thanks to Kiran for posting up the suggestion earlier.

                Comment

                • Kiran Otter
                  Service Manager

                  Site Contributor
                  1,000+ Posts
                  • Dec 2013
                  • 1098

                  #9
                  Re: HP DesignJet 1050c Color problem

                  Heh, in all my years, I never knew that set to greyscale would affect that test print. You learn something new every day.

                  But why would it affect his prints from a PC? The settings in the driver always override the front panel settings. Unless he's using something out of the ordinary, like a generic PS driver (though he said it's a 1050C, not a 1055CM) or maybe Linux and the driver doesn't tell the PC color/greyscale.

                  Kiran

                  Comment

                  • Laka
                    Technician
                    • Nov 2015
                    • 36

                    #10
                    Re: HP DesignJet 1050c Color problem

                    Originally posted by D Hook
                    Kiran nailed it. Checked it just now (sorry for the delay) and on the front panel, to the left of the display, you have a button that says "Color"/Grayscale". Be sure this is set to "Color". I just now set mine to "Grayscale" and got the same result you posted a picture of. When this happened to me awhile back I completely overlooked that button. I was doing some work on the printer and must've inadvertently set it to "Grayscale". Soon as I switched it to "Color" it started to print the Quality Image in color again.

                    Hope that works for you. Thanks to Kiran for posting up the suggestion earlier.
                    Hi!
                    Thanks for your help...!
                    Yes, this was the problem!
                    I've worked with large format printers for almost 20 years and have never had a problem that I couldn't solve - until now...
                    A bit embarrassing that there is a button on the panel that was set incorrectly!
                    A small excuse could be that I don't use it much today except for cad drawings ..!
                    Tanks!
                    /Regards
                    Lars

                    Comment

                    • D Hook
                      Trusted Tech

                      100+ Posts
                      • Mar 2018
                      • 205

                      #11
                      Re: HP DesignJet 1050c Color problem

                      Glad you got it going again.

                      Also, a shout out to PBrooks259. When it happened to me, he was the one who suggested checking that button and sure enough, solved it for me.

                      Sometimes, Occam's Razor holds true, even in printer problems.

                      Comment

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