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Need Help Roland LEF-20 Cyan PH Leaking

PhuKing

New Member
Hi good day,

I hope you all are doing well. I have a LEF-20 UV flatbed printer that has an issue with the C/M print head leaking cyan and contaminating the magenta that gives bad prints and clogging. In the attached images you can see that there's excess cyan ink in the cap tops and on the print heads.
I recently purchased the machine used and had this problem before I replaced ALL cap tops, dampers, print heads as well as the cyan cartridge.
I have ruled out the cap top pump as it is connected to the black/yellow and cyan/magenta cap tops and I only have issues with cyan. I also ruled out the cap top ink line being clogged as I used a syringe to clear it and it wouldn't explain why only cyan is leaking.

I live in a Central American country with no tech support so I have to fix my machines myself and am turning to you guys for help. Any input is much appreciated :smile:.

Cheers,
Jonathan
 

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  • Print Heads.jpg
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  • Nozzle Test.jpg
    Nozzle Test.jpg
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PhuKing

New Member
Fixed the issue... Looks like the previous owners did a cap top pump replacement and accidentally swapped the cyan feed and drain tubes. Every time the pump did a drain, it pumped cyan ink back up into the cap top.
 
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