We have been seeing KM 2550 models with light line deletions (approx. 2 inches wide) down the center of the page from lead to trail on copies only - internal prints are fine. We go to the customer site and clean the optics mirrors thoroughly, the problem goes away for a month or two, but gradually comes back. This does not happen on every 2550 out in the field, just to the same 4 or 5 accounts: an assisted living home, a hospital lounge, a bank, and a few others. It seems like a haze builds up on these models only. Any help would be appreciated.

Make sure that all the fans are free and working if there are filters replace or clean them. Heat build up can cause this also coronas shorting out might be a problem. One last thing check the lint or paper dusk filters they could be dirty.

Could be a bad CCD.

I think I saw something like this caused by dust bunnies in the laser path on the drum unit. I know it sounds pretty optimistic.

quote:

Originally posted by DaveH:
I think I saw something like this caused by dust bunnies in the laser path on the drum unit. I know it sounds pretty optimistic.

This was my first thought too, but seven_mile said internal prints were fine.

Lead to trail on copy only would point to CCD probably.

There is a remote possibility that memory could have a problem.

Are these accounts in close proximity to each other, or do they have similar serial numbers perhaps?

If they are in proximity, perhaps there is a common power issue (thought probably not likely). If there is a haze on the mirrors perhaps it is something environmental?

If they are the same age (serial series) perhaps a bad batch of CCD's were installed at the factory.

Is there an actual haze built up on the mirrors that you can see?

One thing I forgot to mention in my original post, The CCD was replaced the first time we started seeing this problem, at the hospital lounge, with no effect.

As far as proximity to each other, the machines in question are strung out around approx. 50 mile range, so I don't believe it is a power issue.

I checked the purchase dates of three of the machines and found a date range of: 3-10-04, 3-7-05, and 6-27-05.

We just recieved another call today for a KM 2050 at a plastics production factory with same symptoms, so I will be going over to check this one out also.

The suggestion of the fans and filters working freely was not something I had really thought of, so I will make a point to look when I am there.

There is a noticeable haze that is detected on the mirrors when we go to clean them off, with a considerable amount of dust and dirt build up on the clean towel.

Thanks for all the help and suggestions.

Update to earlier post:

This morn. myself and another Technician went to a plastics manufacturing factory with the similar problem. Upon closer inspection of the optics mirrors with a flashlight we noticed a blue-ish haze on the center area of the mirrors. We believe the blue-ish haze was caused by ozone infiltration (caused by the corona perhaps?). The question now becomes: what can we safely clean the optics mirrors with without making the copy quality worse? The other technician suggested Isopropyl Alcohol. I was not sure this was the best course of action.

Any comments or suggestions would be greatly appreciated.

Thanks.

http://dayintlsales.com/uploads/Varn__Duplicator__Wash.pdf

I use this Varn Duplicator wash then Glass cleaner to clean that off. I used to work on printing presses and got use to this and it is safer than most copier solvents smells way better and does not soak up in your skin

But it sounds like something else is the cause other than ozone filter, is anyone using oil on the fusers that could be vaporizing?.

Have you ever tryed just using water to clean the mirrors? you will be amazed @ what a little H2O can do, follow it up w/ windex if you need to, but if you just wet a soft cloth w/ water, clean the mirror and dry it, when you shine the flashlight you should see a clear mirror, the haze you are seeing is usually caused by evaporating fuser oil or the ozone caused by the coronas.

Im Interested in seeing these post because I have to go out on a 2050 with the 2 inch front to rear frame issue, and it also has the C-410 issue. As for the C-410 I was told we were sent a second fix from Mita, and will return the results of how I made out when I have them. As for the CQ. issue, from reading all the input, Ozone and fuser oil certainly could be whats getting in the optics, but I did take notice to the first post because my machine Is also in a assisted living home. The three locations he mentioned assisted living home, hospital, banks are all year round climate controlled, that and when I questioned the tech who has been handeling this account he mentioned condensation on the mirrors. In an attempt to look outside the box I wonder if the machine has an AC vent blowing on it.

I experienced similar problems in the optics. Some techs were using those "stretch & dust" yellow rags to clean the optics. I think they contain oil to prevent dusting when wiping surfaces..

okay seven_mile, did you ever find out what's causing this? I've been down this road with a few of my customers now and am getting desperate. After reading this post I'm gonna start looking for openings in the optics cavity below the center of the mirrors like we used to do on the old canons. Let us know if you actually found a fix for this.

i have the same problems, cleaning the mirrors with water works for a period of time, then the problem comes back... always the same center area,
why not the rest of the mirrors?

With regard to advance's post:

"I'm gonna start looking for openings in the optics cavity below the center of the mirrors like we used to do on the old canons.

I've read a post on another site, by a well respected tech, who was quite certain there was an opening which was at fault. I have not looked for it myself, though.

Sorry I did not answer earlier, been very busy up here lately...
To answer you question, advance, after cleaning the optics with straight water, the problem seems to disappear for 6 to 8 months, then we get another service call for exactly the same thing. I still think the haze on the mirrors has something to do with either fuser oil or ozone build up. The only thing to try and help you, is clean the optics mirrors throroughly with water and a clean cloth. This seems to fend off the problem the longest amount of time. We pretty much expect that these certain accounts will give us a call every half a year or so, and we will have to go out and spend time cleaning the optics. I guess its just something we will have to live with. Kyocera Tech support is no help on this matter, even after explaining what we know is happening.

I don't want to beat a dead horse, but has anyone figured this out. I have the same issue, but with one additional symptom. The heat roller always builds up with toner plus it looks like a rusty color build up over that. Very difficult to remove. Customer claims they run only plain paper and OEM toner. Any thoughts?
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Good luck and may the schwartz be with me.

Replace the mirrors. These machine do this to me all the time. I've only had one machine that I've replaced the mirrors but it worked. Also like all the other machines that are named after birds we have named these machines "The Pigeon", because it sh*ts all over you.

The problem is with the locations. I have 3 of these in hospital labs. Found the same blue haze on the mirrors, tracked it to the ozonated air the labs were using. I ended up doubling the ozone filter and putting in hepa filters in the place of the other filters. Cut my own to fit in the filter spots.........Have a good one..........Duke

We had two 2550's with the same light area right down the middle and its the first mirror near the scanner lamp. It has a blue haze and tried Windex with no results. After we rubbed water really good it went away.

Lower your fuser temp by 10 on all the settings.... It's something to do with the fuser smoking the plastic on the door on the left side. We haven't had a callback on this since we started doing it and that's been over a year ago,