Taskalfa 250ci drum or developer

[Hecke]

Hello everyone,
i am new to this forum. I got two taskalfa 250ci very cheap and i am trying to get one printer working for my startup office.
I am not going to print a high amount, but i need colored A3, fax and network.
Actually i have white lines when printing gray, full black and colors are ok. I have changed the drum and the developer from the other used machine.
The pattern changed, but i am not sure if it is the drum or developer? The printers have not used for a long time, is it possible that toner agglutinated
and the developer needs to be cleaned? I have attached the U089 print.
I would be very gratefuly for an advice where to start. Many thanks in advance,
Hecke

[Max]

Re: Taskalfa 250ci drum or developer

Try a drum and Dev refresh in system settings. Measure the distance between the bands and a drum radius. If same you possibly have 2 bad drums. Tbh get rid of them. They are nothing more than a money black hole.

[Hecke]

Re: Taskalfa 250ci drum or developer

Try a drum and Dev refresh in system settings. Measure the distance between the bands and a drum radius. If same you possibly have 2 bad drums. Tbh get rid of them. They are nothing more than a money black hole.

I have done the drum refesh, but i ll have a look for the Dev refesh.
The lines are not periodic, they are along the feed direction. In this case could the developer be the cause?
I ve seen the drums are not color specific, so i have 4 as spare. At least one of them should work. Many thanks 😀

[toddanderson]

Re: Taskalfa 250ci drum or developer

If the line are lead to trail than it looks like developer unit,
try to put a piece of paper between the mag roller and blade on the dv unit

I have done the drum refesh, but i ll have a look for the Dev refesh.
The lines are not periodic, they are along the feed direction. In this case could the developer be the cause?
I ve seen the drums are not color specific, so i have 4 as spare. At least one of them should work. Many thanks 😀

[Hecke]

Re: Taskalfa 250ci drum or developer

I have done a dev refresh and it made a good result. Its not perfect, but actually the printer is usable.
Maybe the paper between the mag roller and blade will bring the last out of it. I ll try it with the other unit from my spare machine next week and keep you updated.
This helped me a lot, many thanks

[Phil B.]

Re: Taskalfa 250ci drum or developer

I have done a dev refresh and it made a good result. Its not perfect, but actually the printer is usable.
Maybe the paper between the mag roller and blade will bring the last out of it. I ll try it with the other unit from my spare machine next week and keep you updated.
This helped me a lot, many thanks

a few more things to try... ( yes also do the paper/doctor blade trick )

pull the dev units... turn gear slowly so you can see if the mag roller gets even coat of toner/devpdwr..

if you can see voids.. take a dry green scrubby pad ( like for dishes ) remove any caked on color to reveal aluminum roller... spin all the way around bit by bit to repeat process until clean. (you might have to re-do dev refresh )

also make sure laser glass is clean.

[tsbservice]

Re: Taskalfa 250ci drum or developer

Also did a piece of paper trick. May work best if you dump developer from dev unit, I also use to give a dev unit a few firm taps with my screwdriver hand tip. Carefully clear doctor blade gap from debris.
Sieve developer mix through fine kitchen filer to remove waste and caked parts. Poor mixture back, done.


Sigh, not missing those days my hands dirty, my nose filled with black discharge... soooo glad that KM use to exchange the whole damn thing at BIG intervals and if one dare to mess with compatible toners...good luck costly dev unit(no separate parts avail) and lesson learned

[blackcat4866]

Re: Taskalfa 250ci drum or developer

I don't think the paper trick will work on this model. It has two developing rollers. The lower has developer and toner, the upper toner only. And it's got some kind of coating that you won't want to damage with a scrubbie. If you really want the quality back you'll want to replace the developing unit.

Keep in mind that you shouldn't do that developer stir more than, say, twice consecutively. If it was dumping toner a little when you started, it will be dumping toner a lot when it's done, and you'll have to change the developing unit. =^..^=

[Phil B.]

Re: Taskalfa 250ci drum or developer

I don't think the paper trick will work on this model. It has two developing rollers. The lower has developer and toner, the upper toner only. And it's got some kind of coating that you won't want to damage with a scrubbie. If you really want the quality back you'll want to replace the developing unit.

Keep in mind that you shouldn't do that developer stir more than, say, twice consecutively. If it was dumping toner a little when you started, it will be dumping toner a lot when it's done, and you'll have to change the developing unit. =^..^=

Thanks as always for correcting us BC.

all hail the Duke! ( no insult intended Sir! )

[Tonerkiller]

Re: Taskalfa 250ci drum or developer

The laser glass needs cleaned

[Hecke]

Re: Taskalfa 250ci drum or developer

Many thanks for your support. I tried to clean the spare dev unit today. I was able to remove the blade and cleaned it carefully with some clean room wipes.
After changing the dev units the pattern changed an its even a bit better than before. I ll have a look on ebay, maybe i ll find a cheap new dev unit.
I am going throw the second printer away this week. Do you have any suggestions for common spare parts?
I think i ll keep the lifter motors (still have to replace one), and maybe one or two drums. Any suggestion?
If someone from germany needs some spare parts, just let me know.

[blackcat4866]

Re: Taskalfa 250ci drum or developer

If I was you I make space to store the whole beast. It might be the last source of parts you get. =^..^=