Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at bottom

[MitchHPprint]

Good Day Everyone

Background,: I'm helping assist a personally connected church to see what I can do to help them and their Bizhub that's having issues. They reported getting colors that weren't looking right and some black lines on the bottom of prints. I did some test prints to check it out and saw that only the Magenta was showing some issues outside of the black lines on the bottom that happens on all pages. Btw my bizhub knowledge is Novice rank .

Model: Bizhub C360. Magenta Drum replaced 6 or so months ago.

Attached some images for reviewing, the Bizhub is feeding in long side of paper first (paper sitting in the tray as portrait). I noticed the black lines on the transfer belt when I opened it up after a print had completed. So I was thinking I'd have to replace the ITB to fix black lines.

I took out the magenta drum and the Developing unit, they looked okay. The developing unit looked dirty but nothing that looked like an issue (though Novice looking at it). I assume the lens are underneath the developing unit. Saw it didn't look intuitively accessible and stopped for the day as that started to get into the deeper parts of the printer that looked to me taking off more then a cover or part to reach.

After a while researching and learning about bizhub, I saw many Bizhub question here nothing that seemed to resemble attached issue. Figured I'd make a post, ain't gonna hurt except build up the Knowledge base here.

Any suggestions?

[MitchHPprint]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Successfully attached photos, looks like size limits are in place (they were blocked when larger then 2MB.) resized them to lower bytes and Mission success. Makes sense I suppose Storage costs adds up over time for the Copytechnet site owners.

[femaster]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Interesting looking magenta there. Do you know if the magenta drum that was put in was an OEM? I would start by swapping 2 of the color drums around. The 3 colors (not black) are 100% compatible, so you can swap the magenta with the cyan and see if the problem follows the drum. If it does, then you know it's a drum problem.

The stripes do look like an issue with the cleaning unit on the transfer belt. If the belt looks pretty scuffed up, I'd replace it. If it's not bad looking, it's possible that the streaking might just be something stuck in the cleaning blade of the unit. If you feel energetic, the cleaning unit should be removable with 2 screws if I remember correctly. It will be messy, so be prepared.

As for the glass you saw under the dev unit, this would be the laser glass, and in the C360 under each of the dev units you will see a square shaped white plastic rod sticking out, this is the handle for the laser glass cleaner. Not to be confused with the white plastic "flag" that sticks out of the drums, which cleans the charge coronas. It wouldn't hurt to slide all 8 of these (Flags and Rods) in and out a few times to clean things up.

[MitchHPprint]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Interesting looking magenta there. Do you know if the magenta drum that was put in was an OEM? I would start by swapping 2 of the color drums around. The 3 colors (not black) are 100% compatible, so you can swap the magenta with the cyan and see if the problem follows the drum. If it does, then you know it's a drum problem.

The stripes do look like an issue with the cleaning unit on the transfer belt. If the belt looks pretty scuffed up, I'd replace it. If it's not bad looking, it's possible that the streaking might just be something stuck in the cleaning blade of the unit. If you feel energetic, the cleaning unit should be removable with 2 screws if I remember correctly. It will be messy, so be prepared.

As for the glass you saw under the dev unit, this would be the laser glass, and in the C360 under each of the dev units you will see a square shaped white plastic rod sticking out, this is the handle for the laser glass cleaner. Not to be confused with the white plastic "flag" that sticks out of the drums, which cleans the charge coronas. It wouldn't hurt to slide all 8 of these (Flags and Rods) in and out a few times to clean things up.

OEM for the drum. I did try sliding the white rods in and out. Did excessively for the magenta, saw "zero" change in the quality. So I assume that might rule out laser then(since I should of seen something change I imagine?). So, I will give the swapping the drums a shot, belt is pretty beat up and I think I'll lean towards avoiding a mess though(But I'll research up and see if the blade you referenced is accessible enough for me to try and clean a little). Thanks for above advice

[MitchHPprint]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Weirdly that the white dots only appear on half of the test page and later dissipate when getting to right side. I also noticed they aren't on the bottom of the page. That's really weird. Well first thing is to swap drums as suggested. I'll also try to measure the distance of the white fuzzy line repeats also and check back while waiting to get off work to go visit location I'll see if I can google any further info as well before reporting back.

[femaster]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

OEM for the drum. I did try sliding the white rods in and out. Did excessively for the magenta, saw "zero" change in the quality. So I assume that might rule out laser then(since I should of seen something change I imagine?). So, I will give the swapping the drums a shot, belt is pretty beat up and I think I'll lean towards avoiding a mess though(But I'll research up and see if the blade you referenced is accessible enough for me to try and clean a little). Thanks for above advice

In order to check the blade, you will need to remove the transfer belt unit from the copier, it will be on the opposite end of the unit that you can see from the right side access door.

I've seen those tiny white dots before on some other B&W models, and replacement of the transfer belt had resolved them. My only issue with that theory, in your case, is that I would expect to see the dots on all the gradation pages you did. My only other thought might be that the roller behind the belt that corresponds to the magenta drum may have some sort of an issue, like the bushing it rides in broke on one end or something. I've only ever seen that happen once, quite some time ago, but I can't recall what the resulting output looked like from that.

For now, try the drums and see what happens. We can go from there. I'm sure by tomorrow, others will chime in with their thoughts.

[copyman]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Sorry if I missed it. Did you look at the magenta developer unit mag roller to see if it dumped? And if those lines are black you need black drum. If the lines are gray / green color that is waste toner then look at transfer belt.

With lines at bottom of page you could feed paper in other direction and lines will be outside the print area. Always good to have an option even if only able to use B&W with paper in different direction "8.5 x 11R" until you figure it out.

[tsbservice]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

100% agree with femaster. Follow his advices he's top tech! I also think your problems are with ITB unit.

P.S.
Good first post.

[Synaux]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

100% agree with femaster. Follow his advices he's top tech! I also think your problems are with ITB unit.

P.S.
Good first post.

I did not read everything, but that is light damage to the drum.

[MitchHPprint]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Thanks for the posts, I'll check them out tomorrow evening. I work in another position and when I get off I'll review above, it's volunteer/charity based for me, likely won't be able to visit their location again till 4:00 CST. I did take some other pictures at the time but didn't want to flood with information on original post. The magenta drum looked okay previously that day and I rolled it to see all sides but didn't check black (doh). But good point on the colors of lines, My higher quality photo I couldn't upload for size limitation I checked seems to indicate that there might have been other colors faintly blended.

The Developing unit looked really messy (edit that's normal I bet), Pages never exhibit changes or any decline in magenta so looks to be dumping okay. Swapping Drums tomorrow (or "technically" later today with the time lol) and we'll let you know on waiting info.

[tsbservice]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Thanks for the posts, I'll check them out tomorrow evening. I work in another position and when I get off I'll review above, it's volunteer/charity based for me, likely won't be able to visit their location again till 4:00 CST. I did take some other pictures at the time but didn't want to flood with information on original post. The magenta drum looked okay previously that day and I rolled it to see all sides but didn't check black (doh). But good point on the colors of lines, My higher quality photo I couldn't upload for size limitation I checked seems to indicate that there might have been other colors faintly blended.

The Developing unit mag roller looked really messy , that might be normal for this model/brand maybe. Pages never exhibit changes or any decline in magenta so looks to be dumping okay. Swapping Drums tomorrow (or "technically" later today with the time lol) and we'll let you know, but just for all inclusive photo for first day.

From what I'm see now you really don't have magenta developer.

[Firmaware]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Totally agree with Copyman... the developers are not good

Gesendet von meinem SM-G980F mit Tapatalk

[MitchHPprint]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

From what I'm see now you really don't have magenta developer.

I'm not sure I quite understand, are you saying that it's that bad? Cleaning Developer Unit - YouTube Haha! I assumed after watching this that that was the norm.

[blackcat4866]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

I'm not sure I quite understand, are you saying that it's that bad? Cleaning Developer Unit - YouTube Haha! I assumed after watching this that that was the norm.

Definitely not the norm. You should have a nice "carpet" of developer across the developing roller. So you'll want the magenta developing unit.

The white spots indicate to me that the magenta developing roller has been arcing to the magenta drum. I'm thinking you'll need a magenta drum too.

And femaster is probably correct about primary transfer cleaning. Especially if the streaks are composite black (mixed of 4 colors). It should be obvious, even without removing the primary transfer belt. You'd see a streak of toner that wipes right off on the belt, as seen from the right side. Usually I have not had much luck with re-priming the primary transfer cleaning blade. Most likely you'll want a primary transfer belt unit also.

=^..^=

[femaster]

Re: Bizhub C360, white spots with fuzzy white lines on Magenta & Black lines at botto

Yeah, after seeing that development unit, I'll agree completely with the others; there is essentially nothing on the mag roller in the development unit, which means that something caused it to empty out. That is usually the sign of a bad drum. Since the current drum had been in there for 6 months, I'm going to guess that it wasn't the old drum that caused the issue, but was in fact the replacement.

You will definitely need to replace the magenta dev unit as others have said, and even though the magenta drum was recently replaced, you'll want to do it again otherwise you risk draining all the developer out of the new dev unit.

Pardon the mess in this post, it was sent using crappy Tapatalk app...