Prints in color changes paper to a light tan

[copiman]

I have a CS 250ci that has 293,429 on it with it split 50% black and white and 50% color. I do not know the history of the machine. My issue is that b/w prints are fine and color prints are fine with the exception of when doing color the entire page has a tan background. If you placed a color print next to a b/w print, the b/w print's paper is white but the color print the paper is tan. Just wondering is anyone has seen this? Color registration is fine. If it were not for the tan issue all would be fine. Again I do not know the history of this machine so I suggested to completely PM it. I would however like to understand why it is doing what its doing. Lastly I need to ask about PM cycles on color machines. B/W pm kits that are based on 300k I think are to be done when the Black count is at 300k and the Color pm kits are based solely on the color count. Am I thinking correctly?

[wragsdale]

Re: Prints in color changes paper to a light tan

Does the tan background exceed the print margins? Have you run any U089 test prints or can you upload some samples?

The PM cycles are based on the A kits (components used for any print engine usage) using total count and the B kit (color components only) using the color count. If you didn't have any B/W prints on a machine and you hit 300k color and total at the same time, you would replace both A and B at the same time.

[qbert69]

Re: Prints in color changes paper to a light tan

What type of original is the color--print? copy? photograph? color text document?

[copiman]

Re: Prints in color changes paper to a light tan

The tan background covers the entire paper (edge to edge).

Let me make sure I understand. At 300k total regardless of how many are color or black and white, replace the A kit? Then at 300k on color only replace the B kit?

[blackcat4866]

Re: Prints in color changes paper to a light tan

The tan background covers the entire paper (edge to edge).

Let me make sure I understand. At 300k total regardless of how many are color or black and white, replace the A kit? Then at 300k on color only replace the B kit?

That's correct. So you'd like an opinion on color quality, but will not provide a sample? Do you think that the paper is somehow changing as a result of the color copy process? Perhaps one of your other colors needs service or color calibration? I don't think that I'm quite psychic enough to diagnose a color issue without a color sample. Try U089 or something like this:

=^..^=

[Santander]

Re: Prints in color changes paper to a light tan

Since you do not know the history of the machine, have you run a maintenance report and checked the settings against what the default settings should be? Many times a tech will make adjustments to correct one problem only to create others. To start troubleshooting the problem make sure all the settings are back at the default settings and then we can go from there. Without a known base point to start from you could chase your tail for days without getting a resolution.

[copiman]

Re: Prints in color changes paper to a light tan

Sorry for not posting samples. Have not been back to machine. Will try today. Just so you know where I am with the Kyoceras, I was trained in Atlanta a few years ago and did not get much experience prior to me leaving the copier biz. Two months ago my old boss asked me to come back, so here I am. Trying to reacquaint myself with Kyoceras, the manuals, procedures, etc.. Kinda fell like running blind but in time things will get better.

Thanks for helping. Glad to see your still here Blackcat. You have been a great help to me in the past.

Santander, you may be right. The tech prior to me was an experienced tech but not with Kyocera. Who knows what he had done. Once I find what the defaults are I will compare them with the machine. Who knows, maybe I'll get lucky and get to PM the sucker and start fresh.

Thanks again for everyones help. I am all there is and this forum is a blessing.

[copiman]

Re: Prints in color changes paper to a light tan

Here are some samples.

CS250ci color issue.pdf

[wragsdale]

Re: Prints in color changes paper to a light tan

Can't really see any thing in the background on these for some reason, even switching between the b/w and color samples.

I would definitely go ahead and do the A kit. Looks like dev, drum, and belt are all having some varying issues. BTW, you can check your PM counts in U251 and the preset value (or cycle) in U250.

[n25an]

Re: Prints in color changes paper to a light tan

looks like black drum and possibly developer is shot...

concerning color... if the machine isn't used often...I have seen color just go really bad... best bet is to calibrate the colors using the calibration sheet that you buy...

you also might end up replacing the colors...

when i had a similar issue...

I had to calibrate everything...

and it worked for a while but i eventually had to go back and replace the drums and developers... took no chances...

for me it was a magenta background...

I found out that these machines... need to have some color printed out of them every day... if not once a week...if not they start going bad...

That might be your case...

what i would do and this is an expensive what i would do...

see if you can get a used set of drums and developers and start fiddling... swapping in and out...

if the developer units are mono element... vacuum out the suckers and clean them up as good as new and try testing and calibrating... i've used that trick on a couple of kyocera/copystar color machines...

also vacuum out the drums... see if you can swap them around... might let you might not...

the whole idea is to try to make the color change... if you do then you know whats the problem...

and if you are going to replace the drum anyway... lift the drum... cleaning blade... clean it... and see if that helps... by lifting i mean taking out the screws holding it down...

also if there is toner or dust in the high voltage board contacts it can cause wierd issues...

wierd little machines...

[Kyo fan]

Re: Prints in color changes paper to a light tan

Same here. Hard to notice any unusual background on those. Considering the total counter and the rest i noticed following: You don't need to clean the laser unit, the grayscale is bad and only replacement of the K drum unit will fix it (trust me I've been there), yellow fill is weak (color calibration, U412, U410 might help a bit, but new developer unit Y will fix it). The rest looks ok from my point of view.

[subaro]

Re: Prints in color changes paper to a light tan

Seems like the black charge roller is shot or should try cleaning properly anyway. If cleaning does not work, then swap the charge roller with another colour or from a used drum. Then do drum cleaning, dev refresh from system menu i believe. last u410 and colour calibration. I would not spend money on this machine. I would put that to your next upgrade.
charge roller should be cleaned in the proper way and after using whatever detergent ,always finished off with water and dried with clean cloth.

[copiman]

Re: Prints in color changes paper to a light tan

Thanks everyone for your help. When I scanned the examples I could not see the tan background in the color prints either. It is actually at my bosses church so I think we are going to kit the sucker. That should give me a fresh start and I will be able to service it like it should be from then on. From your posts I learned a lot. Did not know you could clean the units out. Also did not know about cleaning the charge roller. Have done these on other manufactures but Kyocera training said always replace. By the way what is the proper way to clean charge roller? Can you elaborate on this? By the way the transfer belt is white and I mean WHITE. Did not think it should look like that based on copy count. Anyway, once I kit it I will use the units removed to open them up and see whats up so I can be familiar with that. Also if you could elaborate on cleaning charge roller, that would be great. Again, thanks to everyone for you help.

[subaro]

Re: Prints in color changes paper to a light tan

Thanks everyone for your help. When I scanned the examples I could not see the tan background in the color prints either. It is actually at my bosses church so I think we are going to kit the sucker. That should give me a fresh start and I will be able to service it like it should be from then on. From your posts I learned a lot. Did not know you could clean the units out. Also did not know about cleaning the charge roller. Have done these on other manufactures but Kyocera training said always replace. By the way what is the proper way to clean charge roller? Can you elaborate on this? By the way the transfer belt is white and I mean WHITE. Did not think it should look like that based on copy count. Anyway, once I kit it I will use the units removed to open them up and see whats up so I can be familiar with that. Also if you could elaborate on cleaning charge roller, that would be great. Again, thanks to everyone for you help.

First, this machine uses dual component, therefore you cannot vacum out the dev or there will be no carrier. With kyocera, always look at bulletin1 for yourself and be familar with it as it gives the general specification for a new machine. subsequent bullteins are updates to improvements ect.
Developing system Hybrid developingDeveloper: 2-component

If you look at the charge roller, it is probably white like the transfer belt as it picks up paper dust from the drum and get coated with it over time. It hinders the charge voltage coverage to the drum and with kyocera at least should be cleaned. Everyone has their own method of cleaning things and i have developed my own and will give a brief description. I use a cleaning agent,[ some use simple green] to clean the white paper dust from the roller. clean one section at a time and put enough on a cloth to just dampen the area. After that do the same with water and wip dry ,that's it. After cleaning, you can then tell the true state of the roller as you can see if there are marks.

[blackcat4866]

Re: Prints in color changes paper to a light tan

First, this machine uses dual component, therefore you cannot vacum out the dev or there will be no carrier. With kyocera, always look at bulletin1 for yourself and be familar with it as it gives the general specification for a new machine. subsequent bullteins are updates to improvements ect.
Developing system Hybrid developingDeveloper: 2-component

If you look at the charge roller, it is probably white like the transfer belt as it picks up paper dust from the drum and get coated with it over time. It hinders the charge voltage coverage to the drum and with kyocera at least should be cleaned. Everyone has their own method of cleaning things and i have developed my own and will give a brief description. I use a cleaning agent,[ some use simple green] to clean the white paper dust from the roller. clean one section at a time and put enough on a cloth to just dampen the area. After that do the same with water and wip dry ,that's it. After cleaning, you can then tell the true state of the roller as you can see if there are marks.

This is about the closest to my own thoughts.

1) Yes it's dual component: Don't vacuum out the unit. Do vacuum out the extraneous toner around the imaging cavity.
2) Yes, start with the "A" kit, clean the remaining primary rollers, and calibrate. At that point you can decide if any further work is required on the colors.
2) I don't like the cloudy yellow image quality. If cleaning the primary doesn't crisp up the fill, you may need to change the yellow developer and/or drum.

Keep in mind that these color developers rarely make yield, so don't panic if you have to replace them early. Also, this is Kyocera color, not Konica Minolta or Toshiba or Canon color. When they say business color, that's as good as it gets. Graphic color just ain't happenin'. Search out the post by Eric that details the color calibration. You'll need that. =^..^=