Seeing colored lines in Demo Page BizHub C220

[L0rdC]

Sorry to disagree. I've never had to change background settings on all the konica minolta models I've worked on. And the issue here is definitely not the developers.

I have used that modification when the developers are worn or old, I have seen those lines on developers too, in the office we have a c360 that I can't figure out how it can print without lines, the drums and developers haven't been changed in years

obviously not a definitive solution

[tsbservice]

Those lines are from drum/drums.