c220 konica white stripes on gradation pattern

[WetPaper]

You may want to look to see if one of the drums or developers are stalling. I can't remember if it was the same model but we had one where one of the drums was not turning at full speed causing a drag on the belt affecting all colors. May have been a developer drive clutch.

[lazymangr]

thanks a lot for the replies. so i went again at the client to get more info
i forced stop the halftone pattern and as you see in the pics i attach, its like the toner from the drum is not "sticking" well on the belt.
also i noticed on new transfer roller same toner pattern from magenta and i still dont understand how it gets too dirty so quick

it might be idc sensor contaminated for some reason? i cant find in the manuals how to clean-replace them

[Gaffers01]

The white spots you are getting is faulty dev units the white lines really look like ITB issue, you said you changed it recently but did you change for this exact issue?

Oh and also forget the Transfer roller as the marks are probably being left from when it does its gradation adjustments which would leave the same markings on the roller.

[lazymangr]

ok i am going now with new itb, drums and going to clean idc sensors and will post back results

[lazymangr]

problem solved.
even that i still dont believe it and even if its less than half way of life, its the transfer belt.
no blurs no spots or signs as every other itb i have replaced, still it was faulty.


so we can mark this as solved and thanks all for the replies