9800 all but yellow

I have a 9800 that had not been used in a very long time, I ran cleaning carts through all channels and am now able to get perfect nozzle tests from all channels except yellow. Yellow is only 2 plus lines of ink on the lower portion.

Any ideas? I have replaced the damper on the yellow but that did not change anything.


Most likely you have lots of crud on the head itself. Time for manual cleaning!


Any instructions on manual cleaning?

all the best,