- Thread starter
- #11
The yellow ink passage way is at the center of the printhead. In my opinion, during heavy printing demand, the yellow ink reaches much more readily to the nozzles bank area than it would have been for other colors. If you had one confirmed dead printhead, you can try to dismantle it and remove the rubbery connector and use a needle to poke the yellow inklet port filter, use a touch light to shine underneath, you see the direct light coming through the yellow inklet port. If you did the same with other colors inklet port filter, you won't see any light coming through. Other colors like Cyan, Magenta and BK etc, those colors travel a certain passage/pathway before they reaches the nozzles bank area which is not as direct as the yellow.Smile said:I tried it on my 6700D print head where I had minor problems with BK C PM PC M nozzles few faint lines (why is yellow always fine?)
Yes, I saw those lines in PM and M in your pictures. This shouldn't be difficult to clear. As you have already uses the solution/or cleaning the printhead externally, there isn't any necessary to undergo another round of external cleaning again. What you have now are just lines/streaks, usually after solution/external cleaning process, the printhead nozzles are very 'ink starve'. So it's typical or common if there are a couple of streaks/lines. Try printing many pages of purge print of those colors that you have streaks/lines in the finest print quality mode that is available according to the paper media type you have selected.Smile said:If you look at full res picture I included in my post you'll see a few lines in PM and M nozzles. These lines are always there, I waited after I did cleaning cycle like you say. But it did not help.
I'll try to clean with stream next, just to make the nozzles damp with warm stream. I know it can be dangerous if done incorrectly. However I have successfully unclogged few print heads this way when other methods failed. So I'll give it a try.