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Need Help Suddenly Lost yellow on CJV30-130

Discussion in 'Mimaki' started by Jesse Cy, Mar 12, 2020.

  1. Jesse Cy

    Jesse Cy New Member

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    Mar 10, 2020
    Iroquois Falls, Ontario
    Hello, a few weeks ago I completely lost yellow on both channels. It is a used printer we bought just recently, so I changed the cap and the pump, and no matter what I do I can't get the yellow to come back.

    After I cleaned the original cap It seemed to have lost it's vacuum, but the new pump and cap seem to be working very well. Checked the solenoids, they seem to be working well. Could there maybe be an air lock in the lines?

    We're over 4 hours away from the nearest tech and so I'm on my own with this. Any suggestions as to what I should check next? I've been all over the forums and I'm not sure what else to try.

    Thank you!
     
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  2. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

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    Aug 2, 2011
    Denver, CO
    First thing to check is the ink cartridge. Sometimes the cartridge will be empty and not flag the machine properly which will cause the yellow to back up. Other than that, you might need new dampers.
     
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  3. Jesse Cy

    Jesse Cy New Member

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    Mar 10, 2020
    Iroquois Falls, Ontario
    It is aftermarket ink, but I have a few of them, and none of them are working when I swap them out. I also put in a new chip on one of them. They light up green, but nothing.

    Could a bad damper cause a sudden dropout on both lines?

    Thank you so much for you reply!
     
  4. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

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    Aug 2, 2011
    Denver, CO
    If you have a CMYKx2 setup one bad damper can affect both channels since they are connected. One way you can test things out is to swab the yellow dampers with another color next to them, run a cleaning cycle, and then print a nozzle check. If the yellow prints in the new position but the other color doesn't, you might have a head issue. If the yellow still doesn't print in the new position, either the damper or some other part above the print head is failing. Do you see ink in the lines and damper?
     
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  5. Jesse Cy

    Jesse Cy New Member

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    Mar 10, 2020
    Iroquois Falls, Ontario
    I did an ink fill with a new damper and it doesn't seem to be filling much at all. Wondering if I did it wrong. I was going to open the solenoids through the maintenance menu again and tip the damper to see if it will fill. About to do that now actually.
     
  6. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

    4,185
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    Aug 2, 2011
    Denver, CO
    The circle part of the damper should be about half full and it's usually a little lower. You also shouldn't see any air in the ink line above.
     
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  7. Jesse Cy

    Jesse Cy New Member

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    Mar 10, 2020
    Iroquois Falls, Ontario
    I can't seem to get the dampers to fill up no matter what I do. Would air in the lines cause this?

    I did open the solenoids when I tried to fill them by pressing the circle, and still nothing.

    Also, I have not tried using a syringe to pull ink in, there seems to be some discussion as to whether this is necessary or not with these types of printers. Is what I should try next?
     
    Last edited: Mar 12, 2020
  8. Alan Menhennet

    Alan Menhennet Member

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    Jul 8, 2018
    Johannesburg
    I tried this once and for the life of me couldnt get the dampers filled. The technician came out... Used a syringe and worked. So there is some techique to it. But from what Ive seen is you have to use a syringe
     
  9. L.D

    L.D Member

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    Jan 19, 2018
    Atlanta
    If you open the ink valve, turn the damper upside down and pull with syringe to get the air out then turn right side up it will fill up nicely!
     
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