C6500/C6501 Black spots on Black Drum

[seniortech]

Is anyone out there having any problems with small black spots on C6500 Black drums?

I have been to 5 different machines over the past couple of weeks, all in different enviroments and on every machine have had to change the black drum because of small black spots on the drum.

The machines are well within the 200K service interval and have done between 20K and 80K.

Thanks

[jma676]

Someone or something is damaging the Drums, I think you mean that the sensitive area of the Drum was damaged, leaving a small point.

In some cases of high humidity, can cause this fault for a crash, but I guarantee that in normal conditions this does not happen, maybe if you hit with something or someone.

[jrf]

I have only 2 of these machines but i have had to replace 3 drums in the last 2 weeks because of blank spots as a result of tiny marks on drums.

[seniortech]

The drum surface is not damaged, with a small piece of cloth you can flick away the small toner spots and the green drum surface seems perfectly ok. however they will quickly return usually within 2K. Replacing the drum is the only option...

[Avalon]

This is a known issue to do with the coating on the drums, TAUS1000512EN00.
The only recommendation is to fit the 102C drum part no.A0400Y4

[ineo+6501]

What Avalon said.......... Fit the new type drum from the 6501. 102C.

[seniortech]

The 102C is the only type of drum we fit...

[jma676]

Konica Minolta Bizhub Pro C5500/C6500/C5501/C6501/C65hc Drum Unit (DU-102)

Originally: DU-102
Actualization: DU-102B / DU-102C

[hosman80]

now that you mentioned i have had the same problem a few times in the last month with those drums (DU-102C), i wonder if they had a bad batch of drums....

[RRodgers]

Has it been hot?

[seniortech]

The temperature at all sites was no more than 70 degrees F. 3 machines were in clean air conditioned rooms. I had to replace another drum today with exactly the same problem. hope we are not seeing a problem similar to the blade flip problem we had a couple of years ago...

[HORSE]

On this subject ....I'm saying nothing

[Stirton.M]

Usually this problem is primarily due to humidity, or in the past, poor cleaning blade contact.

Cleaning with a dry cloth is usually enough to fix the problem. I generally prefer to use methanol as it cuts through the toner a little easier. Just be sure to wipe the drum dry after before you retalc. Sometimes drum shock may be present, but this disappears fairly quickly.

[buster68]

We are having the same problem here. On all our 6500s, no matter the environment, temperature or humidity. We ordered some drums from Katun and have had excellent results. I think KonicaMinolta has changed the cleaningblade rubber for the 102C drums that causes this problem.

[jma676]

We are having the same problem here. On all our 6500s, no matter the environment, temperature or humidity. We ordered some drums from Katun and have had excellent results. I think KonicaMinolta has changed the cleaningblade rubber for the 102C drums that causes this problem.

Drums Drums Drums, The Curious Case, Katun has no Drums Formulated for Bizhub Pro C6500, Only for Bizhub Pro C500, these products have good performance, but will never be better than the OEM DU-102.

Katun only offers Rebuild Kit, and the framerate will depend on the state of other components, such as lubricant for cleaning roller Brush.

Maybe you been able to adapt these to the Bizhub Pro C6500, because it has a wide range of stabilization Control , but I don`t believe that it is functioning properly.
DU-101 is not compatible with the D-102.

In addition, If what you say is true... Katun should announce it such as compatible with both DU Types, But.. they are not.