Roland SC 545EX black halfway gone

[dsgn]

Hey Guys

I've got problems with my 545 printing black.
As you see on the attached photo, black doesnt print on one channel. After a few cleaning circles it prints just fine.
But only for about 1/2 meter, then it drops out again.

Before i have to call the tech guy i thought i ask here, maybe its something simple i'm able to fix by myself.
Thanks in advance for every hint.

Dan

 

[Jester1167]

Possibly a bad/clogged damper.

Dampers are cheap and easy to replace. Be careful when installing them. You don't want to break the nipple.

 

[Solventinkjet]

Yeah it's probably a bad damper or cap top. Also, flush the pump tubes to make sure they aren't clogged.