repeating digital pattern on a Bizhub C364

[bigwul]

Re: repeating digital pattern on a Bizhub C364

We have replaced the MFP(Main) board already. I think I forgot to list that. I am inclined to agree with you that a loop may be out of adjustment. KMBS said to replace the Memory Module so that is next as it arrived yesterday. I suggested a factory reset. At least its under warranty and we get all these non consumables for free. I am posting for another tech at my company. I still think it is software/firmware related. Such as a setting or adjustment out of spec or tolerance.

Thanks for all the replies. Still open to suggestions.

When he says loop - I think he means EYE LOUPE - magnifier so that you can check for repeat patterns.....not an adjustment loop.....just saying.....

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

My english is not very well, and may I haven't explained it correctly. It seems it's the serial number used to printed with not visible yellow dots. It seems it's this https://w2.eff.org/Privacy/printers/docucolor/ .

EarthKmTech said: it looks a hell of a lot to me like its overlaying the serial number in the wrong colour in colour prints, it is supposed to be yellow so as to not be visible.

That does look like what is happening. If that is what is happening why is it using all of the colors and how do we stop it? Maybe just roll it off a cliff. It won't print spots after that... lol

[yianni]

Re: repeating digital pattern on a Bizhub C364

That does look like what is happening. If that is what is happening why is it using all of the colors and how do we stop it? Maybe just roll it off a cliff. It won't print spots after that... lol

You are right, I don't know. I'm not a copier technician. Does the yellow printed well? Especially the light shades (0-20%).
I suggest to scan a very small portion in high resolution, you will see the exact colors and you will confirm it's the serial number. 2400dpi is like a eye loop magnifier. The attached photo is a 1 x 0.5 cm (about 1/2 x 0.2 in) of 16 points cyan letters.

[minoltaed]

Re: repeating digital pattern on a Bizhub C364

I would start with the memory. Some of the older color boxes would do some weird stuff. Memory always fixed the issues. Sounds like some things I have seen in the past.

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

I would start with the memory. Some of the older color boxes would do some weird stuff. Memory always fixed the issues. Sounds like some things I have seen in the past.

We replaced the memory. The tech is hesitant to do a factory reset for some reason. We are going to test the power outlet for noise. To see if that could be the cause of the problem. The damage is done so what ever part is cooked is what we need to find. We're hoping we can find the cause so the solution will present itself. If not we may have to have a KMBS rep look at it.

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

Update. We are replacing the SSD board today. If that does not fix it then they will have the KMBS rep come out so we can look into getting the unit replaced. I was hoping for a resolution to post but we will have to wait and see. I still think he should do a factory reset. I will mention it again.

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

Another update... SSD did not fix. The KMBS rep thinks someone is trying to copy currency on the machine. Or the machine thinks that. It will get worse each time an attempt to copy currency is made. There is a special way to reset it and only KMBS seems to know at this point. Our rep doesn't even know. I treating thought is that the repeating patter may contain info as to what the problem is. As if it is a code.

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

Well, we sent the samples to KMBS and they confirmed that is what it was. The customer tripped the copy protection. They are stating that the F.B.I. may get involved and the machine may be confiscated and an investigation may take place. Don't copy currency on a Konica Minolta, not even for educational purposes. This machine is at a college. I assume with digital rights management progressing in digital systems that copyrighted material may be the next thing to trip copy protection. As of now I assume it is only affected by currency. KMBS Tech support did not even know or if they did, didn't tell us what was going on. As a service tech this info is vital so we can address it A.S.A.P. So if you are servicing a Konica Minolta and see something like this that boards cannot fix, call your rep.

Thanks for your help!

[Makinbacon]

Re: repeating digital pattern on a Bizhub C364

Update....again. KMBS has come back to us and said they no longer think that this issue is due to copy protect. They are investigating further. Our tech has to go do a data retrieval. I will keep this thread updated because I want the right info for the next person who has the issue... sorry.

[Blizzoo]

Re: repeating digital pattern on a Bizhub C364

I just converted a Bk IU into Y one on a C252 a few weeks ago (lot cheaper than buying a Y unit ) and had those patterns in color mode but not in bw mode, until bk toner depleted from Y unit. Thanks to this thread i was sure that those patterns had to be visible and to not worry about them. This is first time doing this modification.

In your case I will be curious the results swapping the Y dev unit with M or another color to see if the dots changes in color.Before doing that i think is better seal the toner supply holes and disable New Release Detection mode, steps are in theory section in the manual.