Kyocera 3051ci white lines Dev units going bad?

[fishleg]

Seem to be seeing this alot more lately with people not using the machines for months any ideas what causes it?

If I do a Dev / Drum refresh a couple of times it goes a lot better then gradually goes back to white bands. I'm guessing it's the developer unit gone bad.Screenshot_20210225-231053_Teams.jpg

Black and Magenta are like that cyan and yellow seem to be fine. Any ideas?

Thanks for any help.

[blackcat4866]

Re: Kyocera 3051ci white lines Dev units going bad?

Yes, that's developer.

On the Saturns we had a way of making the machine self-calibrate more often. Naturally it used more toner and filled the waste box faster, but the more frequent stirring of the color developers did prevent the developer from dying slowly.

I can try to track down those settings... no guarantee that they apply to the AlphardII Series.

Maybe one of the other Kyocera guys has these settings for the Alphards? =^..^=

[fishleg]

Re: Kyocera 3051ci white lines Dev units going bad?

Yes, that's developer.

On the Saturns we had a way of making the machine self-calibrate more often. Naturally it used more toner and filled the waste box faster, but the more frequent stirring of the color developers did prevent the developer from dying slowly.

I can try to track down those settings... no guarantee that they apply to the AlphardII Series.

Maybe one of the other Kyocera guys has these settings for the Alphards? =^..^=

Is it just the dev blade getting bunged up that does it? Yeah any settings you have its worth a shot on the next one seen 3 machines like this so far from coming back online after being quiet / off for months.

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

I'm curious what causes the problem, too. Not that it really matters because we can't take the DV apart and do anything about it. Still, it looks like the DV is starving for toner or the doc. blade is screwed up 6 ways from Sunday. How man pages are on the DV unit?

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

I wanted to get some more practice today changing out DV's and drums on the 3551ci.

I changed out the cyan and magenta drum and DV. I timed it. It took 15 minutes to change the parts and put the machine back together. It took an additional 30 minutes to run all the sims and test. Total time: 45 minutes.


I've been using Work Flow but I never realized quite how valuable it is. The person who wrote the Work Flow Program (I don't know if he wants me to say his name) added a few extra steps when running the sims. Things like checking the DR & DV counts, cleaning the laser, ect. It's really nice for me because I always have to look at the manual because I don't have all the sims memorized that I need to run and there's no way I can forget a simulation when I replace something.


Also, I noticed that when I replace a DR or DV with a used one that the machine knows how many copies are on it. I suppose the DR and DV has an EPROM on them?

[blackcat4866]

Re: Kyocera 3051ci white lines Dev units going bad?

... Also, I noticed that when I replace a DR or DV with a used one that the machine knows how many copies are on it. I suppose the DR and DV has an EPROM on them?

That's correct.
Many toner cartridges do that also, continually writing data to the EEPROM with toner yield data.

I'm not sure how much of this applies to the Alphard's ... but this is the changes we did on Saturns with this issue:
1) Set sim 464, Set Custom, set to On. 2) System Menu, Adjustment/ Maintenance, Color Calibration Cycle, select Custom. 3) Sim 464, "SetCalibTiming duringPrint", set to +480. 4) Sim 147, Set Operation Mode, select Mode 2. 5) Sim 464, run AC Calibration.

Please let me know if you figure it out. =^..^=

[fishleg]

Re: Kyocera 3051ci white lines Dev units going bad?

The ones I've seen do it are no where near life like 200k copies maybe 3 year old machines. They all use genuine toners as well.

What does a Dev refresh do btw since that seems to bring them back sometimes. I was at a 8052 yesterday and the copies where very pale did a Dev refresh and work flow 464 etc and back to perfect. Just want to try and understand what's happening so I can fix it better? Just doing the refresh made it go back to normal but I thought I'd do 464 etc just out of procedure. Does Dev refresh run a certain U code?

[blackcat4866]

Re: Kyocera 3051ci white lines Dev units going bad?

It's just a developer stir without storing a new value, or perhaps you'd call it a forced toner add. It stirs the developer until the toner sensor reads what it should.

Take care how many consecutive times you run the developer stir. Two times is ok. 3 to 4 times will cause overtoning. =^..^=

[blackcat4866]

Re: Kyocera 3051ci white lines Dev units going bad?

I got this from Luther a while back, and have used it with success for the AlphardII series:

From System Menu set Calibration to "short". Set U325 to "On" and Mode 2. Set U148 drum refresh set to mode 3. Set U147 set minimum to 20. There is an increase in waste toner usage, due to more frequent self-calibration.

I just came across it in the database. =^..^=

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

I got this from Luther a while back, and have used it with success for the AlphardII series:

From System Menu set Calibration to "short". Set U325 to "On" and Mode 2. Set U148 drum refresh set to mode 3. Set U147 set minimum to 20. There is an increase in waste toner usage, due to more frequent self-calibration.

I just came across it in the database. =^..^=

Just so I'm clear....


This will solve under-toning problems?

[blackcat4866]

Re: Kyocera 3051ci white lines Dev units going bad?

Just so I'm clear....


This will solve under-toning problems?

Yes. A drum refresh places a layer of toner on each drum, then wipes it off. That additional use of the color developing units helps keep it stirred. =^..^=

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

Yes. A drum refresh places a layer of toner on each drum, then wipes it off. That additional use of the color developing units helps keep it stirred. =^..^=

Appreciate the information. I'm gonna check that out today. Thanks again.

[fishleg]

Re: Kyocera 3051ci white lines Dev units going bad?

Is it possible to do a Dev refresh on just one colour?

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

That's correct.
Many toner cartridges do that also, continually writing data to the EEPROM with toner yield data.

I'm not sure how much of this applies to the Alphard's ... but this is the changes we did on Saturns with this issue:
1) Set sim 464, Set Custom, set to On. 2) System Menu, Adjustment/ Maintenance, Color Calibration Cycle, select Custom. 3) Sim 464, "SetCalibTiming duringPrint", set to +480. 4) Sim 147, Set Operation Mode, select Mode 2. 5) Sim 464, run AC Calibration.

Please let me know if you figure it out. =^..^=

I had a chance to check the settings out here at the shop. I didn't change the settings because everything is working fine. I do, however, have a machine in the field that is experiencing an under-toning problem. I can run developer refresh and calibration and it will work fine for a little while and then the pages will go back to looking washed out. Only cyan and magenta are having this problem. Black and yellow remain consistently filled in.

I know this has been discussed already, but I'm wondering why this is happening? Is the developer just worn inside the unit? Has the develper simply lost it's magnetic properties for whatever reason?

In other words, by changing the settings that you're talking about, is this just compensating for worn developer?

I know you said something about machines with low usage, but in my case this is a high usage machine.


Edit: I know from back in the day that one way I used to compensate for worn DV to is increase the target value @ toner sensor. When the developer became worn, adding more toner to the DV unit would compensate for this. To, be honest, it always concerns me to run these new machines out of specs. Maybe it's just best to replace the DV units in question??

[BillyCarpenter]

Re: Kyocera 3051ci white lines Dev units going bad?

Is it possible to do a Dev refresh on just one colour?

No, when you select DV refresh, there's no option to select a single color. You can forcibly add toner to one color via simulation but I'd be careful with that as you have no way of knowing exactly how much to add and it could become way over-toned.