KM 2550 Blank area in center of Copies only

[nzcowboys]

Hey Guy's,

Have had three machines produce a 2 inch wide blank area in the center of the page when copying only (internal prints and external print jobs are fine)
This can be intermittant or a hard fault.

We know it cannot be anything to do with the engine and must be optical.
I have read quite a few forums regarding this fault and have noticed the blue film on the center of the mirrors which I am not fully convinced is the whole story.

Has anybody got to the bottom of this as I have had another machine produce this fault today.

Any input would be much appreciated.

Thanks

[Jimbo1]

Just the basic facts...can you show me where it hurts?

Does it happen from the glass, from the feeder or both?
Need to eleminate something somewhere.

[nzcowboys]

Happens from both Document feeder and Glass.

Thanks

[banginbishop]

white band

[bsm2]

blank area

clean mirrors with glass cleaner
get a film on mirrors you can't see

[knightfall]

I'm thinking that even with a blue haze on the optic there should still be enough light reflected back to the ccd to produce some image even light image but if there is no image a void of image I would think it would have to be the ccd that is causing the problem since you said printing an internal report prints out ok but not from the scanner (copyboard or doc feeder) that is where I would start.

[brasilmichaele]

I'm thinking that even with a blue haze on the optic there should still be enough light reflected back to the ccd to produce some image even light image but if there is no image a void of image I would think it would have to be the ccd that is causing the problem since you said printing an internal report prints out ok but not from the scanner (copyboard or doc feeder) that is where I would start.

i would clean all the mirrors with alcohol. i have had the same issue on the km2050 also

[brasilmichaele]

Hey Guy's,

Have had three machines produce a 2 inch wide blank area in the center of the page when copying only (internal prints and external print jobs are fine)
This can be intermittant or a hard fault.

We know it cannot be anything to do with the engine and must be optical.
I have read quite a few forums regarding this fault and have noticed the blue film on the center of the mirrors which I am not fully convinced is the whole story.

Has anybody got to the bottom of this as I have had another machine produce this fault today.
.

Thanks

i have had this problem on the km2050. i cleaned the mirrors with alcohol and took care of the issue

[tech07]

Re: KM 2550 Blank area in center of Copies only

I can almost guarentee you, it's optics/mirrors..you have to clean them very thoroughly

[Jude]

Re: KM 2550 Blank area in center of Copies only

Might want to check your dv unit but most likely optics. Use a flashlight against the mirrors and clean. Use alcohol.

[blackcat4866]

Re: KM 2550 Blank area in center of Copies only

I've had the same problem. You do a smc report and this eliminates the engine side and as you say their is a blue haze on the optics. All I’ve done is cleaned it with a glass cleaner and so far so good but I’m possibly thinking it might be ozone but without looking at the machine or the parts manual I don’t know if it has a fan or filter by the upper left side that might need replacing.

clean mirrors with glass cleaner
get a film on mirrors you can't see

I'm thinking that even with a blue haze on the optic there should still be enough light reflected back to the ccd to produce some image even light image but if there is no image a void of image I would think it would have to be the ccd that is causing the problem since you said printing an internal report prints out ok but not from the scanner (copyboard or doc feeder) that is where I would start.

i would clean all the mirrors with alcohol. i have had the same issue on the km2050 also

I can almost guarentee you, it's optics/mirrors..you have to clean them very thoroughly

I'll concur will all these gentlemen and/or ladies. The ozone can get quite dense on the slit glass, mirror3, and mirror2. It's very common on that whole series of machines.

I've had success with isolating the area between the fuser and scanner, by taping over holes in the scanner frame, and insulating the area between the left side cover and the scanner frame. The machine I'm thinking of now goes for more than a year between optics cleanings.

=^..^=

[MR Bill]

Re: KM 2550 Blank area in center of Copies only

Yes with blackcat. Also lower the fuser temp about 10 deagrees.

This guy posted this over 4 years ago. I bet he fixed it by now??

But good info anyway.

[madas]

Re: KM 2550 Blank area in center of Copies only

Hi.
Make sure you clean "All" the mirrors. we had a tech who missed out the top left mirror and it still looked the same.

madas

PS just noticed the date lol.

[daveh12]

Re: KM 2550 Blank area in center of Copies only

definitely the optics. clean thoroughly the optics and slit glass. problem should go away.

[nmfaxman]

Re: KM 2550 Blank area in center of Copies only

Check the white plate on the glass.
If it reads dark where it should read white, all dark is white.