[Misc] KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

[Raydicks]

I am working on a CS-2550 the Printed pages are great however, the copies pages are light in middle left to right thru the ADF and Smeared Left to right if just on the glass.

200,010 pages, I just replaced the Maintenance Kit (MK-420) due to other issues which are now corrected. (the Ozone Filter was in such bad shape it fell apart)

I have attached 3 pages the first was printed directly then one pages thru the ADF and one directly on the glass.

I think it is a mirror or mirrors that may be dirty but I wanted to get some input before I go further.

Thank you in advance for any advice.

[masterchill]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

Yes this is a common issue with theses machine. Clean all of the mirrors in the optics and that should clear it up. They get a haze on them. You can try to kick down the fuser temp a little because this is the main cause that will haze them but watch you don't go to low to effect the toner being fused to the page.

[itchyfinger@att.net]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

agree. optics have the fuser film build up on them. I found Katun sells a mirror and film remover that works great. otherwise may have to take mirrors out and wash with soap and water if you take them out, make sure you notice how they are in there. they are front faced mirrors.

[Phil B.]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

I am working on a CS-2550 the Printed pages are great however, the copies pages are light in middle left to right thru the ADF and Smeared Left to right if just on the glass.

200,010 pages, I just replaced the Maintenance Kit (MK-420) due to other issues which are now corrected. (the Ozone Filter was in such bad shape it fell apart)

I have attached 3 pages the first was printed directly then one pages thru the ADF and one directly on the glass.

I think it is a mirror or mirrors that may be dirty but I wanted to get some input before I go further.

Thank you in advance for any advice.

ALWAYS ALWAYS ALWAYS when going to a machine THOROUGHLY CLEAN THE UNIT. So many problems can be cleared up ( PQ & CQ ) by cleaning the unit. I had one tech years ago that REFUSED to clean the machine.... well let's just say.. he didn't last long ( plus he refused to put all screws back in proper place )

[Phil B.]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

agree. optics have the fuser film build up on them. I found Katun sells a mirror and film remover that works great. otherwise may have to take mirrors out and wash with soap and water if you take them out, make sure you notice how they are in there. they are front faced mirrors.

windex does fine on the mirrors ( I would never remove one unless it's broken ) then if you are getting a ozone buildup quick on the mirrors use 'Rain-X' on them... keeps them from building up as quick

[Phil B.]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

Yes this is a common issue with theses machine. Clean all of the mirrors in the optics and that should clear it up. They get a haze on them. You can try to kick down the fuser temp a little because this is the main cause that will haze them but watch you don't go to low to effect the toner being fused to the page.

what I have noticed in the 30+ years doing this... extreme ozone buildup is due to clogged filters... most techs don't even replaced them from the kit. see my note lower on the "rain-x" trick

[blackcat4866]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

Yes this is a common issue with theses machine. Clean all of the mirrors in the optics and that should clear it up. They get a haze on them. You can try to kick down the fuser temp a little because this is the main cause that will haze them but watch you don't go to low to effect the toner being fused to the page.

So true. You'll have good results with 99% alcohol cleaning those mirrors. I do not recommend removing the mirrors, since so often techs have trouble getting them re-installed properly.

I've had good results with covering the holes in the bottom of the scanner with self adhesive mylar and filling the gaps in the left cover with thin foam (not blocking vents). Also shorten up your sleep timers as much as your customer will tolerate (hopefully like 5 minutes). It will reduce plastic degrading in the fuser, and reduce the ozone buildup in the scanner. On my machine I cut it back to 3 minutes. =^..^=

[Raydicks]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

Yes this is a common issue with theses machine. Clean all of the mirrors in the optics and that should clear it up. They get a haze on them. You can try to kick down the fuser temp a little because this is the main cause that will haze them but watch you don't go to low to effect the toner being fused to the page.

Thank you, so you are talking mirror 1,2 & e ( in Figure 2-1-3 in the service manual right? (Page 227))?

is there a need to do anything to the Exposure Lamp the CCD PCP ?

Thank you

[masterchill]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

Yes those mirrors. You could wipe down the lamp while you are in there. You don't really have to mess with the ccd.

[Raydicks]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

I cleaned all 3 mirrors and it was a huge improvement! Thank you for the advice so far.

However, there is a light print area in same place. I'm going to assume that my next move is the CCD. I would assume that if I remove the ISU cover that I should be able to access the ccd?

Is it still ok to use Windex or 90+% Alcohol or do the rules change here?

or is there something else that i'm missing?


An additional question since this customer has a number of Copystar printers / MFP's and the would rather get them repaired vs replacing them. In my past I have been able to print the test charts from actual devices however do you guys advise to order the 72570140 8.5X11 TEST CHART I think its a pack of 10. or is that unnecessary?

I wanted to thank everyone for their willingness to provide the help and suggestions so quickly it is very much appreciated!

[blackcat4866]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

... However, there is a light print area in same place. I'm going to assume that my next move is the CCD. I would assume that if I remove the ISU cover that I should be able to access the ccd?

Is it still ok to use Windex or 90+% Alcohol or do the rules change here? ...

Alcohol is fine. Just be aware that the CCD position is crucial for good focus. It's OK to remove the cover, and any plastic tunnel cover between the lens and the CCD. But do not remove any screws that are painted (precision adjustment). There are four screws that can be removed to change the CCD as an assembly but it's entirely unnecessary to remove them for cleaning. Especially NEVER TOUCH the screws that attach the CCD sensor board to the CCD frame. You'll never get it positioned properly again.

... An additional question since this customer has a number of Copystar printers / MFP's and the would rather get them repaired vs replacing them. In my past I have been able to print the test charts from actual devices however do you guys advise to order the 72570140 8.5X11 TEST CHART I think its a pack of 10. or is that unnecessary?

On most modern MFPs you can print PDFs directly from a USB stick. I do most of my image diagnostics that way. It's quick & easy. The files are attached below. That being said, you cannot print a PDF directly on a CS-2550. Those test patterns will work fine for you. I think you'll discover that you lose the first (8) of them in the first month. The remaining (2) test patterns will last you for many years, until they get quite ratty and tattered. (10) is a good amount. =^..^=

[darry1322]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

I cleaned all 3 mirrors and it was a huge improvement! Thank you for the advice so far.

However, there is a light print area in same place. I'm going to assume that my next move is the CCD.

I've never had an issue with the CCD on one of these. Clean the mirrors again. I have had to go over the mirrors a couple of times when the glaze was really bad and had been there a while. Also don't forget to give the slit glass a very good scrubbing bottom and top.

[Raydicks]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

I've never had an issue with the CCD on one of these. Clean the mirrors again. I have had to go over the mirrors a couple of times when the glaze was really bad and had been there a while. Also don't forget to give the slit glass a very good scrubbing bottom and top.

I'll check this morning I thought it was still there even when not using the sheet feeder, so i thought it was a problem with the Slit and the scan glass but I"ll check and let you know.

Thank you.

[JeffMills]

Re: KM / CS-2550 Printed Pages ok Copied pages Light or smeared in middle

I cleaned all 3 mirrors and it was a huge improvement! Thank you for the advice so far.

Also when you took Platen glass out and cleaned in optics did you take out small slit glass and clean bottom also.And pull out drum and dev unit the rear side of optics clean that slit glass and when you have out developer unit check the h-cut that dev flow looks even. I usually check optics(mirrors) with flash light.



However, there is a light print area in same place. I'm going to assume that my next move is the CCD. I would assume that if I remove the ISU cover that I should be able to access the ccd?

Is it still ok to use Windex or 90+% Alcohol or do the rules change here?

or is there something else that i'm missing?



An additional question since this customer has a number of Copystar printers / MFP's and the would rather get them repaired vs replacing them. In my past I have been able to print the test charts from actual devices however do you guys advise to order the 72570140 8.5X11 TEST CHART I think its a pack of 10. or is that unnecessary?

I wanted to thank everyone for their willingness to provide the help and suggestions so quickly it is very much appreciated!

Also when you took Platen glass out and cleaned in optics did you take out small slit glass and clean bottom also.And pull out drum and dev unit the rear side of optics clean that slit glass and when you have out developer unit check the h-cut that dev flow looks even. I usually check optics(mirrors) with flash light.