Cyan drop out

[bovegas]

I am having problem with my VJ-1617H. Cyan drops out after printing couple 4x8 sheets. I have to do litlle charge and than is fine for next couple sheets. I was looking at service manual and cyan has lines from 2 cartridges going into the different dampers. Its not going into 1 damper both chanels. One damper is shared with Cyan and Magenta and the other one is shared with Cyan and Black. So I am assuming its not problem with damper since Black and Magenta both channels are perfect. I have looked at cyan lines and they dont have air bubles inside. Any idea what else could be a problem?

 

[unmateria]

Cartdridge rubber seals, tubes, orings reused in the dampers, bad dampers (aliexpress), or the rubber under the printhead captop

 

[bovegas]

Is there a way to narrow down possible cause?

 

[unmateria]

A little... When nothing is printed, tubes still have all its ink and dampers look depressed? Then its the rubber inside the printhead (not easy to find a replace). If ink is lost on the tubes, can be a lot of things. If u usually insert and take out the same cartdridges, try with other cartdridges. Look for the dampers o rings first and the dampers. Are original ones or aliexpress/diggiprint ones? In those, the rubber seals are usually very bad

 

[bovegas]

Thanks a lot, those are great ideas