Bizhub C258 color and Bw drum unit

[flippinsweet]

Re: Bizhub C258 color and Bw drum unit

Could anyone tell me if they've had any issues using black drums as colour drums in the c308 range?

I've fitted quite a few recently by changing the front end and the chip and not had any issues. Now my MD is telling me I can't do this anymore as someone told him doing this will damage the dev units? Didn't tell me anything else, just that it's a well known problem and that it will cause the dev units to fail?

Wondering if anyone else has heard of this, the guy who told him also wants to sell him refurbished colour drums for around the same price as a new black drum so it sounds like a load of Bull to me?

[jonbonse]

Re: Bizhub C258 color and Bw drum unit

Hi all

Does anyone know if the Konica C258 colour drums fit the Olivetti MF254?

[habik]

Re: Bizhub C258 color and Bw drum unit

Hi all

Does anyone know if the Konica C258 colour drums fit the Olivetti MF254?

It will, just need to modify.

[seriches]

Re: Bizhub C258 color and Bw drum unit

We don't bother changing the chips we use adapters !


Very easy to convert the black drums to color and the savings are massive.

can i ask where you bought drum chip adapter from please
steve r
seriches@gmail.com

[nitro912gr]

Re: Bizhub C258 color and Bw drum unit

Hello everyone, so you need to replace what exactly? The blue part only or the blue AND the black part behind it? (I have the chip changed, I just need to fix the half drum not touching right thing).

This difference isn't visible with just looking at it?
I haven't touched the new units but I try to compare an older used one that was with the printer (that is dated before 2016) with the new unopened black drum and can't spot any difference of the old black with the new black.
(yet the new unit can't sit right and I get that gradient printing).

IMG_20210513_133711.jpg

[femaster]

Re: Bizhub C258 color and Bw drum unit

Hello everyone, so you need to replace what exactly? The blue part only or the blue AND the black part behind it? (I have the chip changed, I just need to fix the half drum not touching right thing).

This difference isn't visible with just looking at it?
I haven't touched the new units but I try to compare an older used one that was with the printer (that is dated before 2016) with the new unopened black drum and can't spot any difference of the old black with the new black.
(yet the new unit can't sit right and I get that gradient printing).

[ATTACH=CONFIG]49155[/ATTACH]

The differences aren't visible in your picture. If you are trying to use a black drum in place of a color drum, then the black end piece needs to be swapped between the new black drum and the old color drum. Depending on when that black drum was made, you may also need to swap the small black piece that is still on the metal drum shaft in your picture. One last thing that needs to come off is a small plastic piece attached to the right side of the drum assembly, 3/4 of the way down the body of the drum towards the rear side.

The differences between the color and black drums (besides the chip itself) are:
1) The piece of plastic that is held in place by the 2 screws on the black drum end cap in your picture. That piece is a spacer the affects the gap between the drum and dev unit. The black drums have a raised tab on that piece, where the color drums are flat.
2) The plastic piece attached to the right side of the drum assembly.

Konica-Minolta DR-313 Drum Comparison.jpg

[nitro912gr]

Re: Bizhub C258 color and Bw drum unit

The differences aren't visible in your picture. If you are trying to use a black drum in place of a color drum, then the black end piece needs to be swapped between the new black drum and the old color drum. Depending on when that black drum was made, you may also need to swap the small black piece that is still on the metal drum shaft in your picture. One last thing that needs to come off is a small plastic piece attached to the right side of the drum assembly, 3/4 of the way down the body of the drum towards the rear side.

The differences between the color and black drums (besides the chip itself) are:
1) The piece of plastic that is held in place by the 2 screws on the black drum end cap in your picture. That piece is a spacer the affects the gap between the drum and dev unit. The black drums have a raised tab on that piece, where the color drums are flat.
2) The plastic piece attached to the right side of the drum assembly.

[ATTACH=CONFIG]49161[/ATTACH]

Thank you very much for the clarification.
My man sent me the drums without this modification (only the chip change) and I didn't want to sent them another trip back and forth because couriers are savages and those are delicate parts.
He told me by phone what to do but having a clear picture of what I'm looking for helps a ton.

[pepper38_cnd]

Re: Bizhub C258 color and Bw drum unit

We don't bother changing the chips we use adapters !


Very easy to convert the black drums to color and the savings are massive.

I know this is old but with today's shortages we find we have Black drum and can't get color drums. Do you know if these adapters are still available? and where I may purchase them? Thanks

[occus]

Re: Bizhub C258 color and Bw drum unit

Can someone please give me a tip? I changed the black and blue front from an old color drum onto the new black drum. I replaced 2 drums and both had the same problem. Where is the trick?
sample.jpgsample2.jpg

Thank you for feedback.

[femaster]

Re: Bizhub C258 color and Bw drum unit

Can someone please give me a tip? I changed the black and blue front from an old color drum onto the new black drum. I replaced 2 drums and both had the same problem. Where is the trick?

The two suggestions I have are:

1) Don't leave the tiny screw behind when you remove the small black tab on the side of the K-drum. Some people just tend to pull the plastic tab off and then never remove the screw that was holding it in place.
2) Once the blue handle piece is removed, you are faced with FIVE (5) screws in the black plastic end-cap. Remove only the three (3) screws with the wide heads, DO NOT TOUCH the two (2) small head screws found on either side of the metal drum shaft! These hold a black plastic piece to the other side of the end-cap. If that piece is moved it will alter the gap (distance) between the drum and development unit and create all sorts chaos and mayhem with your copy quality, along with potential damage to the new drum as well as possibly draining of the developer from the development unit.

[occus]

Re: Bizhub C258 color and Bw drum unit

The two suggestions I have are:

1) Don't leave the tiny screw behind when you remove the small black tab on the side of the K-drum. Some people just tend to pull the plastic tab off and then never remove the screw that was holding it in place.
2) Once the blue handle piece is removed, you are faced with FIVE (5) screws in the black plastic end-cap. Remove only the three (3) screws with the wide heads, DO NOT TOUCH the two (2) small head screws found on either side of the metal drum shaft! These hold a black plastic piece to the other side of the end-cap. If that piece is moved it will alter the gap (distance) between the drum and development unit and create all sorts chaos and mayhem with your copy quality, along with potential damage to the new drum as well as possibly draining of the developer from the development unit.

Many thanks for your support.

I didn't touch the two screws from the spacers. Yes, I left the small black screw that falls in when removing the blockage, but removed it afterwards. Unfortunately, it makes no difference in print quality.
I also played around with the metal spring contact on the front. There is contact grease on it from the old color unit. I cleaned and removed them but that doesn't make a difference either.

At first there were other versions of image units where they then changed the spacer.
My black imaging units are now new versions and I take the front part of the old factory color imaging units.
Can that cause the problem? Can anyone confirm this has ever worked? Stripes are not visible at full tone pattern 255. I test always with 150 density.

[tsbservice]

Re: Bizhub C258 color and Bw drum unit

Many thanks for your support.

I didn't touch the two screws from the spacers. Yes, I left the small black screw that falls in when removing the blockage, but removed it afterwards. Unfortunately, it makes no difference in print quality.
I also played around with the metal spring contact on the front. There is contact grease on it from the old color unit. I cleaned and removed them but that doesn't make a difference either.

At first there were other versions of image units where they then changed the spacer.
My black imaging units are now new versions and I take the front part of the old factory color imaging units.
Can that cause the problem? Can anyone confirm this has ever worked? Stripes are not visible at full tone pattern 255. I test always with 150 density.

On new style K drum there is an extra black plastic tab which I just remove and throw away because it hinder.
I will do one next week and take some pics for you.