bizhub c3300i/c4000i IU problems

[REGSIS]

Has anyone having problems with imaging units with these models?

One of the colours depleting toner and dumping it into waste toner box.

Also noted (on installation) too low or too high TCR ratios with coresponding service call and cca 300V difference from ither colours for Vg and Vdc.

Developer bumps on magnet roller and lack of developer on magnet roller.

[tsbservice]

Re: bizhub c3300i/c4000i IU problems

It is too early for us to say but your problems are strange. It's developer who dumps in WTB usually, when overtoning machine has CQ problems like foggy background etc do you have CQ problems?
Too high TCR ratio definitely isn't good like high voltages. Check SM for proper voltages.
Thanks for the warning.

[REGSIS]

Re: bizhub c3300i/c4000i IU problems

The only way (on these models) to transfer toner to WTB is from magnet roller to drum (and even transfer belt) without being transfer to paper.
Developing units of A3 color models have output to dispose surplus of developer to WTB. These models don't have that but only the output for toner scraped with drum cleaner.
Don't think it's a voltage problem because if there's no charge on magnet roller or primary charge roller that would be seen on paper like fully covered with particular color.
Difference in voltages can occur after image stabilization as machine try to compensate after reading weak (too light) patch from transfer belt in order to maintain image quality.

Could this be a FW problem?

P.S. Forgot to mention in my first post, when I tried to pull out problematic IU its drum was fully covered with toner.

[fntsy]

Re: bizhub c3300i/c4000i IU problems

Hi, I had the same problem with Bizhub C3300i.
The client changed the yellow toner on around 800 total pages and after around 100 pages the yellow is empty again. The waste toner box was almost full with a yellow toner. The drum on the yellow IU was covered with toner and the developer was depleted. I toped up the developer using one from Bizhub C220. The TCR ratio normalized at around 6,5% and that seems to fix the problem for now. I inspected the drum surface and it is clean. I don't know the initial reason developer was lost. What color is your problematic IU, REGSIS? I don't think the dumped toner passes through the transfer belt. I think the drum itself is faulty. Maybe the problem will reappear. Or maybe they just did't put enough developer initialy?

[REGSIS]

Re: bizhub c3300i/c4000i IU problems

I had problems with 5 of these. IU Y and C mostly.
Noticed that was happening with inital FW G00-23, and not with newly released G00-38 machines.
Also noted that these strange behavior starts after toner change and can also stop after toner change, and after that reappear again on next toner change.

There is no official solution, only information that a change of particular IU solved the problem, but i strongly recommend a FW update to G00-3B.

I had no chance to test it or solve the issue by myself because KM replaced problematic printers with new ones under warranty.

[Bix]

Re: bizhub c3300i/c4000i IU problems

At the moment I have no customer who replaced the toner but Konica Minolta before installation highly recommended me to use the FW G00-38 because the FW G00-23 is problematic


Now it is possible to upgrade to the G00-45 version. A big update will come soon.

[tech51]

Re: bizhub c3300i/c4000i IU problems

Avoid V45 at all costs.

It it has a bug that can brick the machine and is unrecoverable.

I would wait until the next release of firmware.

[Bix]

Re: bizhub c3300i/c4000i IU problems

Hi, can you give more details about the bug that can damage the mfp?

[fntsy]

Re: bizhub c3300i/c4000i IU problems

The firmware version on my faulty machine is G00-38. So that highly recommend version by KM is also not good. I also noticed the TCR values for IU C started going up and are now at 11%. I guess it will soon start to dump it's developer.

[emujo2]

Re: bizhub c3300i/c4000i IU problems

I think the problem dealt with BH secure..You need ver 45 to fully enable BH secure and if you partially enabled then went to ver 45 it couold cause a problem..We were told not to enable BH secure until ver 45 was released. I have not heard of any other issues caused by this release. E

[TonerTrouble]

Re: bizhub c3300i/c4000i IU problems

It is my belief that Konica is having a large problem with the TCR sensors. I have similar problems on a 3350. It took 4 Y IU to get a good one. And you can imagine the run around in between. The TCR sensors are not reading and reporting reality.

[tech51]

Re: bizhub c3300i/c4000i IU problems

Hi, can you give more details about the bug that can damage the mfp?

[Bix]

Re: bizhub c3300i/c4000i IU problems

Maybe I understood. I think I heard something from KM. When you initialize the machine, the HDD is deactivated. The problem is that in the iSeries there is no HDD and therefore an electronic card (perhaps the ssd?) that causes the error is deactivated.

[Sysco]

Re: bizhub c3300i/c4000i IU problems

I have 4 machines in field this problem.
3 C3300i and one C3350i.
Every machines have to high tcr state.
3 magenta tcr high and one black tcr.
I try to lower the tcr from 0 to -3 but not good.
A tcr is over 10% when I print halftone the tcr is reduce to normal 7-8% but after not to many printed pages go back to over 10%.
I will try the IU change maybe it works.
The most important I use the G00-53 FW.

[copier tech]

Re: bizhub c3300i/c4000i IU problems

Hi,

If I could hijack this thread please.

I'm having this exact same issue but on a C3350i so far I have replaced 2x yellow IU, 1x black & 1x cyan machine only has 12K total count.

The machine will call for a toner customer will fit new (genuine) however the message will not clear.

Fitting a new IU of that colour temporally resolves the issue.

I can not see any bulletins on this issue from KM?