[CQ] Common Developer Issue with Kyocera Taskalfa 3051ci

[daveh12]

Hi everyone,

I have a query regarding a problem with some of the developers in these machines (see attached pics). I have seen this issue on nearly ten machines now, sometimes it's one dev unit, sometimes two at the same time.

Replacing the problematic Developer unit always fixes the issue and the machine runs perfect. When I Inspect the replaced Dev unit/s they look fine don't look like they should be causing any issue.

Machines all have latest firmware etc

Has anyone found a fix for this that doesn't involve replacing the whole Dev unit?


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[daveh12]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

I should say some of the developers have a count of 30000 and two months old others have 400000 prints and 2 years old.


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[Lunatech]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

I have been wondering the same thing. We have a couple of machines that have had this problem and we have replace the developing units and fixed them for the most part. One of them is having the same thing again just 3 months later and less than 10k pages. Just seems silly to keep throwing whole units at the problem, but not sure what else to do at this point.

[blackcat4866]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

So far I've taken apart two of these developing units, and successfully reassembled ... well, none of them. Inevitably I end up breaking something. And no, I don't know the cause. =^..^=

[Santander]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Like Blackcat, we have inspected and dis-assembled a number of these developing units to find no apparent cause. Toner coverage on a problem unit looks the same as other DV's in the unit yet replacing the DV resolves the problem. It is dis-heartening to have a DV fail with less than 30K on it, at least it is still under warranty!

[Tricky]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Had new machines out of the box with them issues occasionally.

[daveh12]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Thanks for the feedback. I had hoped I was just overlooking something but I guess I'll have to make do with replacing the full units for now. At least as said above they are mostly covered under the warranty.


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[Ropariva]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Thanks for the feedback. I had hoped I was just overlooking something but I guess I'll have to make do with replacing the full units for now. At least as said above they are mostly covered under the warranty.


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Have also done disassembly of several of these failed units with no obvious cause found. Our humidity is quite high here. Thought that might be a contributor..? Then I thought it may be a build up of paper dust? It's the randomness of the defect that gets me, leading me to conclude it must be an internal bias connection to one of the dev rollers. If someone has fixed one of these, would love to know ho.

[20gaugeO/U]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

This problem also goes back to the 3050ci line, check out the TASKalfa3050ci/3550ci/4550ci/5550ci/6550ci/7550ci Troubleshooting Guide if you haven't already. There doesn't seem to be any rhyme or reason which machines will do it (high or low volume), only 1 out of 4 dev units will do it, have a rash of cyan dev units in a week will happen. Whatever they "fixed" in the new dev units it doesn't seem to come back.

[daveh12]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Just to come back to you, I saw this service bulletin for an issue that looks really similar this.




The DS Pulleys have been changed on newer Developer Units. Unfortunately no mod for current Developer units.



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[blackcat4866]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Developer spacers! I'm willing to bet that the aluminum mag roller shaft will be worn down in that area, so new spacers won't help by the time you notice the symptoms. And you can't order a mag roller.

Thanks! =^..^=

[kyove]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

This problem also goes back to the 3050ci line, check out the TASKalfa3050ci/3550ci/4550ci/5550ci/6550ci/7550ci Troubleshooting Guide if you haven't already. There doesn't seem to be any rhyme or reason which machines will do it (high or low volume), only 1 out of 4 dev units will do it, have a rash of cyan dev units in a week will happen. Whatever they "fixed" in the new dev units it doesn't seem to come back.

Where can I find the troubleshooting guide?

I've looking everywhere in reserved area but i cannot find it.
Someone can post it please?

Thank you in andvance,
Kyove

[tonerlung]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Came upon this fault a long time back, If you compare this dev unit to the faster models you will notice that the plate and springs which push the magnetic roller into place are different. On the 3051ci's the pressure of the pushing spring at the rear is poor because the plate is plastic allowing the rear of the developer unit to bounce against the drum giving spikes on the copies. I modified these by replacing the springs with slightly stronger ones salvaged over many years form various products. Hope this helps.

[giddyupngo]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Make sure all toner in machine is OEM, we chased a similar problem in a black and white machine for about 9 months before switching the toner to OEM. Fixed.

[Ropariva]

Re: Common Developer Issue with Kyocera Taskalfa 3051ci

Came upon this fault a long time back, If you compare this dev unit to the faster models you will notice that the plate and springs which push the magnetic roller into place are different. On the 3051ci's the pressure of the pushing spring at the rear is poor because the plate is plastic allowing the rear of the developer unit to bounce against the drum giving spikes on the copies. I modified these by replacing the springs with slightly stronger ones salvaged over many years form various products. Hope this helps.

Last week I came across a machine with these symptoms for the first time since following this thread.
I'm able to confirm that the thin black roller that correctly spaces the magnetic roller from the drum was worn in the centre at the end corresponding with the quality problem.


The replacement developer unit has obviously been beefed up in this area and the this black roller has now been replaced by a much thicker white nylon roller.


It's a shame that we are unable to purchase these rollers as a spare part [emoji53]