Welcome To Signs101.com: Largest Forum for Signmaking Professionals

Signs101.com: Largest Forum for Signmaking Professionals is the LARGEST online community & discussion forum for professional sign-makers and graphic designers.


  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

A 'how to' video on recovering from cross contamination in damper.

Discussion in 'Videos' started by 96XP, Jan 29, 2014.

  1. 96XP

    96XP Member

    Apr 8, 2012
    "Having done a print test before getting started, I noticed the Magenta had bled into the yellow side. Once I opened the printer and examined the damper, I could see it was 1/2 mixed (contaminated). It was a situation I would have to attempt myself as the tech guy is a 10 hr. round trip. So I thought to shoot some video of the process and upload it if I succeeded.

    Well, I did, so here is that video.
    Please be careful when doing your own repair work. This information is not professional, but to share with others in the event they encounter such a situation under similar conditions."

  2. phototec

    phototec Very Active Member

    May 23, 2008
    Thanks for making and posting the video, I wish more people would take the time to this to HELP everyone out.

    I have read many posts about using a syringe to perform different repair functions, however I have never watched a video showing the syringe in use, I don't have one and think I should get one to have on hand, looks like the tip fit the tubing perfect, where did you get your syringe?

    Also, can you explain what caused the contamination in the first place, that is something I want to avoid?

    Thanks again for doing this.

    :thankyou: :clapping:
  3. VanderJ

    VanderJ Merchant Member - Printer Parts and Sevice

    Aug 2, 2011
    Denver, CO
    Reasons for cross-contamination:

    1. Failing Dampers - Dampers keep the proper pressure through out the system. If they are failing, the ink normally wants to recede back to the cartridge. When the damper fails the ink starts to flow back which causes the ink in the cap top to be pulled back as well.

    2. Failing Cap top - The cap top tube can be partially clogged causing the ink to pool up in the cap. This creates a siphon effect which makes the ink in the cap flow up towards the head. The cap top sponge can also swell and touch the bottom of the head causing the same effect.

    3. Broken Manifold / head membrane - The manifold that channels ink to the head can break inside causing ink to flow between channels. Likewise, the membrane inside he head that separates channels can also break causing the same problem.

    4. Backwards pump - This one only happens if you connect the pump tubes in the wrong place. If the pump tube are in the wrong sides, the pump essentially pumps toward the head rather than from it causing ink to be pushed back into the head.
  4. 96XP

    96XP Member

    Apr 8, 2012
    @ phototec:
    As there are always so many unknowns that may further complicate matters, I always search for video instructions first.
    A lesson learned when I was 16 and had my first Dodge Challenger. Snapped every stud off the wheels on the drivers side, only to find out when I went to replace them that they were all reverse thread. (true story)
    Google hadn't been conceived of yet at that time, however, the first Texas Instruments calculator came to market and was the size of a work boot. Lol

    Got the syringe from a local Fiberglass supplier.
    That all said, paying it forward :)

    Thank you for helping us out with your addition of expertise to this thread. Parts on order, along with some backups, just in case.

Share This Page