roland xf640 waste ink buildup

We have 3 Rolands but not sure how the XJ-640 works. There's something underneath the wipers that drains in the ink waste bottle? On ours, the two things that drain into the bottle are the tubes that come from the pumps of the printhead(s), and another from the "mist surge" sponge, that sits right next to the wipers. That one has clogged once on the large printer and had to pull the tube out to get it to drain again. The gunk came off surprisingly easy, like a big piece of melted wax.

 

I've worked on some where the customer didn't realize that the "mist under sponge" #15 below was there and never changed it when changing the upper sponge (#16 below). It breaks down and ink dries up in the tube. I've just put forceps down the tube and pull out what I can and follow that with pushing a swab saturated to dripping with cleaning fluid through the tube till it's clean. You may need to remove the tube (not shown in this diagram) from below the tray (#23 below) if it is really clogged. But I've never had to replace that tube.

Good Luck