Bizhub C258 artefacts, strange lines on printouts

[blackcat4866]

Those color bars have to be crossfeed. One of your drums is arcing to it's developing unit. Usually it's the one with the faintest color bar, so judging from your samples it's either yellow or magenta. Replace the drum and developer units of the desired color together at the same time.

[Synthohol]

feed direction?

[rjjr148]

Bizhub C308 stranges lines appear on print in color & bw.
Any suggestions will be highly appreaciated.

[Takhnamishvili]

Re: Bizhub C258 artefacts, strange lines on printouts

You changed all those parts for a simple drum issue?

Yes

[copier tech]

Re: Bizhub C258 artefacts, strange lines on printouts

Yep, black drum failed, as guys mentioned and advised to change it. But I learned how to solve it temporary, earlier I have never touched Vpp values, did not know anything about them😁

You changed all those parts for a simple drum issue?

[Gift]

Re: Bizhub C258 artefacts, strange lines on printouts

Glad you sorted it.
Actually those guys who advice to change black drum save the day

Still interesting, I never really fiddled round with KM voltages, too so I'll keep that one in mind and thx for that hint.

[Takhnamishvili]

Re: Bizhub C258 artefacts, strange lines on printouts

Glad you sorted it.
Actually those guys who advice to change black drum save the day

Yep, black drum failed, as guys mentioned and advised to change it. But I learned how to solve it temporary, earlier I have never touched Vpp values, did not know anything about them😁

[tsbservice]

Re: Bizhub C258 artefacts, strange lines on printouts

Guys, I solved this issue by increasing Vpp-K value. Image became perfect. Thank to all of you and especially to tsbservice! Solution is temporary, customer will change black drum with new one after few days.

Glad you sorted it.
Actually those guys who advice to change black drum save the day

[Takhnamishvili]

Re: Bizhub C258 artefacts, strange lines on printouts

Guys, I solved this issue by increasing Vpp-K value. Image became perfect. Thank to all of you and especially to tsbservice! Solution is temporary, customer will change black drum with new one after few days.

[FrohnB]

Re: Bizhub C258 artefacts, strange lines on printouts

Have you tried a different Transfer roller?

[tsbservice]

Re: Bizhub C258 artefacts, strange lines on printouts

All Vpps are above 1000

How much above? Post screenshots.

[Takhnamishvili]

Re: Bizhub C258 artefacts, strange lines on printouts

Change black drum with new. Your Vpp voltages are trown off. That's why you put another used but good working drum change nothing. New drum with new chip will register correct voltages especially Vpp which in your case may be under 1000, see table 1 those values mean something

All Vpps are above 1000

[tsbservice]

Re: Bizhub C258 artefacts, strange lines on printouts

Change black drum with new. Your Vpp voltages are trown off. That's why you put another used but good working drum change nothing. New drum with new chip will register correct voltages especially Vpp which in your case may be under 1000, see table 1 those values mean something

[Takhnamishvili]

Re: Bizhub C258 artefacts, strange lines on printouts

How about internal prints, like the management list or configuration page? Do you get any of the original image?

If you emergency stop the machine mid-print, is there a properly developed latent image on the belt? I'm thinking probably not. Is there a properly developed latent image on the black drum? If yes, perhaps there is a primary transfer charge issue.

Can you cheat the waste bottle sensors, and see if the black drum is rotating? If the black developer or drum were not rotating you might get an image like this. Or if the laser was not writing the image ... but you've replaced the laser.

Just speculating. Maybe this will start you in another direction. =^..^=

Many many thanks for your advices. I will try these steps and will be back with results

[blackcat4866]

Re: Bizhub C258 artefacts, strange lines on printouts

How about internal prints, like the management list or configuration page? Do you get any of the original image?

If you emergency stop the machine mid-print, is there a properly developed latent image on the belt? I'm thinking probably not. Is there a properly developed latent image on the black drum? If yes, perhaps there is a primary transfer charge issue.

Can you cheat the waste bottle sensors, and see if the black drum is rotating? If the black developer or drum were not rotating you might get an image like this. Or if the laser was not writing the image ... but you've replaced the laser.

Just speculating. Maybe this will start you in another direction. =^..^=