HP M477fnw image quality issues

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  • Kiran Otter
    Service Manager

    Site Contributor
    1,000+ Posts
    • Dec 2013
    • 1100
    #1

    HP M477fnw image quality issues

    A customer of mine asked if I knew how to fix a HP Color Laserjet M477fnw. I told them I didn't but I would look into what it might take to fix it. It looks to me like something contaminated the transfer belt, but I really know nothing about laserjet printers. It's made +70K prints. Is this printer worth repairing? Attached is an example of what it's doing. Anytime they print something with a lot of color, that area ends up repeatedly showing part of a print in that area. It looks like it's always in the same place though, from the examples I saw. I've attached an example. They are using HP supplies, but at one time had tried 3rd party cartridges. After they leaked toner they went back to the HPs. I don't know how old the printer is.

    Thanks,

    Kiran
    Attached Files
    Tags: area, attached, color, print, printer
    • GIUBOSS
      Service Manager

      Site Contributor
      1,000+ Posts
      • Jul 2013
      • 1382
      #2
      Re: HP M477fnw image quality issues

      Originally posted by Kiran Otter
      A customer of mine asked if I knew how to fix a HP Color Laserjet M477fnw. I told them I didn't but I would look into what it might take to fix it. It looks to me like something contaminated the transfer belt, but I really know nothing about laserjet printers. It's made +70K prints. Is this printer worth repairing? Attached is an example of what it's doing. Anytime they print something with a lot of color, that area ends up repeatedly showing part of a print in that area. It looks like it's always in the same place though, from the examples I saw. I've attached an example. They are using HP supplies, but at one time had tried 3rd party cartridges. After they leaked toner they went back to the HPs. I don't know how old the printer is.

      Thanks,

      Kiran
      I think it's more of a fuser problem, did you take a look at the wear condition of the fuser? Try locking the sheet before it completely exits the fuser to be sure.

        Comment

        • blackcat4866
          Master Of The Obvious

          Site Contributor
          10,000+ Posts
          • Jul 2007
          • 22917
          #3
          Re: HP M477fnw image quality issues

          It looks like fuser to me too. The measurement I took from your scan looks like 2.23" or 56.6mm. That's a bit small for a heat roller, but maybe correct for the pressure roller. It should be obvious from the examination of the fuser rollers if the problem is there. The 56.6mm defect interval indicates a roller of 18mm diameter.

          This is not one of those HP fusers that is particularly easy to get to. The book shows all the covers coming off to get it out.
          =^..^=
          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

            • JR2ALTA
              Service Manager

              Site Contributor
              1,000+ Posts
              • Feb 2010
              • 2027
              #4
              Re: HP M477fnw image quality issues

              This is definitely fuser. I speak from experience because on this stupid model, you can't check the condition of the rollers without removing it.

              Removal is tricky but YouTube has everything you need. The bigger problem is the $$. These are considered throw away printers by many because of parts and labor expense.

                Comment

                • tech28
                  Trusted Tech

                  Site Contributor
                  250+ Posts
                  • Jun 2013
                  • 434
                  #5
                  Re: HP M477fnw image quality issues

                  Fuser, if its simplex. looking about 250.00 plus installation(20-30minutes) If its duplex 350 and up for fuser. Didn't see d in your definition of model so it's simplex.

                    Comment

                    • Kiran Otter
                      Service Manager

                      Site Contributor
                      1,000+ Posts
                      • Dec 2013
                      • 1100
                      #6
                      Re: HP M477fnw image quality issues

                      Thanks for the input from everyone. Sounds like it's not worth it to repair it, at least in this situation. Plus I probably wouldn't attempt it, even with the service manual. Laserjets aren't my gig.

                      Kiran

                        Comment

                        • techie0419
                          Technician
                          • Apr 2017
                          • 36
                          #7

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