[Image Quality] Thin line won't go away on Konica bizhub Press C6000

[tulintron]

Re: [Image Quality] Thin line won't go away on Konica bizhub Press C6000

I failed to see this thin black line through colors in pic 2.

black line.jpg

[tulintron]

Re: [Image Quality] Thin line won't go away on Konica bizhub Press C6000

I'm having an issue with a printer I started servicing, it's a Konica Minolta bizhub PRESS C6000 and it has 1.8m clicks. It looks very good and clean and all the consumables are still in good shape, nothing with more than 90%.

So, it's printing a thin line only noticeable with the black color as you can see in this A3 prints I've scanned and attached. It's also only noticeable when printing greys, if its full black it won't appear.
It's worth to mention that this line gets thinner some days, like 0.2mm and other days it gets thicker, but never more than 1mm.

[ATTACH=CONFIG]51385[/ATTACH][ATTACH=CONFIG]51386[/ATTACH][ATTACH=CONFIG]51387[/ATTACH]
I have already clean the laser glass and changed the corona with a new one and the problem persists.
I've ran out of ideas, anyone could help me?

joaopaulooo, disconnect the IC from the printer.Just turn on the printer and print test pattern number 55, 62, 75.


From these tests, we will have other concepts.

[tsbservice]

Re: [Image Quality] Thin line won't go away on Konica bizhub Press C6000

[ATTACH=CONFIG]51628[/ATTACH]

I was meaning CMY colors

[tulintron]

Re: [Image Quality] Thin line won't go away on Konica bizhub Press C6000

I was meaning CMY colors

Yes. The fault appears only in black. I suspect some bad contact or noise in the controller connection cable. If not, I change to SCIPB or PRIPB board. But we need to do tests.

[joaopauloooo]

Re: [Image Quality] Thin line won't go away on Konica bizhub Press C6000

Remove the transfer belt, K drum and corona and thoroughly clean the black plastic part that the K corona sits on.

I get those lines after very humid days, cleaning the part I described has always fixed the problem, that you are currently facing, for me.

This one really worked! It always happened when the weather was humid. Thank you!