I've seen this and cleaned optics and its been fine after. This time its made no difference. Copies off glass and through adf have about a 1 inch light stripe from left to right down the middle of the page. Prints however are normal. if you adjust exposure to get the glass close to good then the adf is still light. If you adjust the adf to be about normal then the glass is way to dark. lamp, rails,cables are all clean and lubed. I even tried different CCD and lamp and it made no difference. re-seated connectors on all related boards and no difference. Any one seen this? Thanks for any help. Meter is only about 150k
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Re: km/cs 2550 light in the center of copies, prints are fine
So it's a blur in the sub-scan direction? Always in the same place with respect to the leading edge?
Watch for a scanner drive anomalies. Like lumpy hard grease on the scanner rail, or the scanner cable over-wrapped over itself or kinked, or a scanner drive timing belt jumping. =^..^=If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^= -
Re: km/cs 2550 light in the center of copies, prints are fine
Seems to be just light and it does it through ADF so the lamp is stationary and at home position. when you darken the light center starts to go away and rest of image gets "dotty" dark, but not the entire image dark. That's why I thought CCD. Adjust exposure to near a normal pattern and that specific light strip starts to look as if its in Bold just in that strip. Thanks for any feedbackComment
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Re: km/cs 2550 light in the center of copies, prints are fine
I've seen this way too many times. You have a haze build-up on some part of your optics. Clean good with a damp cloth.
Setting the low power and sleep modes too high ( like 240 minutes ) can cause the machine to over heat the parts in your exit section causing the fuser to fail and other parts to degrade.Comment
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Re: km/cs 2550 light in the center of copies, prints are fine
I have been told that ozone can fog the mirrors up and ozone will not be removed by alcohol, just water. I always clean the optics with a damp cloth, then go over it again with an alcohol cloth.If at first you don't succeed, redefine successComment
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Re: km/cs 2550 light in the center of copies, prints are fine
This may seem excessively obvious, but did you check the white reference on the bottom side of the platen glass? I've seen where a customer will spill a coke or a cup of coffee on the platen and have it seep into the reference causing a washed out band.Comment
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Re: km/cs 2550 light in the center of copies, prints are fine
Well hate to tell you but clean your mirrors and then clean them again. Keep cleaning them until you problem is gone.
Let us know what takes care of the problem.Comment
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Re: km/cs 2550 light in the center of copies, prints are fine
I have seen a lot of fuser oil build up in the middle of the mirrors on these. Usually hard to see the build up without a flashlight. Try cleaning it with windex. The laser cover gets really bad dust build up, so you will want to pull the drum and look behind it. This of coarse, assuming the fuser doesn't have a toner build up on it?Sorry, no. Techs don't carry toner.Comment
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Re: km/cs 2550 light in the center of copies, prints are fine
Thanks, whatever it was on the mirrors or ccd and lens I tried water first, no luck, then Wiped em all with cleaner and boom. Nice. 23 years doing this and I only had to use a glass cleaner when people were smoking in their offices. you could see that. Whatever it was on the optics, definitely invisible.
probably fuser oil Thanks again
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Re: km/cs 2550 light in the center of copies, prints are fine
I believe it's ozone from the primary charge.
On many of the early Mita's it was common practice to black tape over any holes in the scanner frame, to try to stop airflow from the engine through the scanner area. I do this on the CS-2550/2050/1650 also. At the time I believed it was fuser oil vapor, but the copystar does not use any fuser oil or web or any cleaning rollers.
Back in the day we were cleaning the mirrors with trichloroethylene. Since it was discovered as a cancer-causer, we've been using 99.9% alcohol. It takes additional scrubbing but still works.
Congratulations. =^..^=Last edited by blackcat4866; 02-02-2013, 03:59 AM.If you'd like a serious answer to your request:
1) demonstrate that you've read the manual
2) demonstrate that you made some attempt to fix it.
3) if you're going to ask about jams include the jam code.
4) if you're going to ask about an error code include the error code.
5) You are the person onsite. Only you can make observations.
blackcat: Master Of The Obvious =^..^=Comment
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Originally posted by MR Bill:337789
Agree, keep cleaning them, seen this all too often.Comment
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