C220 copy quality issue , print is fine

[davidj7]

Hi
I have attached 2 images one is 'image gradation -print' its perfectly okay and the other is 'image gradation -copy' which is having image quality issues in all colours.
I have done basic cleaning of the glass, mirrors but no change . I havent touched the CCD .
I am trying my hands on KM for the first time .

Its basically a copy problem so any ideas on where I should start .

Thanks
David

[blazebusiness]

Re: C220 copy quality issue , print is fine

Hi
I have attached 2 images one is 'image gradation -print' its perfectly okay and the other is 'image gradation -copy' which is having image quality issues in all colours.
I have done basic cleaning of the glass, mirrors but no change . I havent touched the CCD .
I am trying my hands on KM for the first time .

Its basically a copy problem so any ideas on where I should start .

Thanks
David

Copy quaity resolution will never compare to print resolution and hence may reveal any inconsistancy with the image units that doesn't show up as much when printing. That being said, you obviously need to start with the optics as the prints look ok. Remove the original glass.Using a cleaning pad dampened withalcohol, wipe the mirrors. Then make more copies to see if there is any improvement. Also, take note as to whether your copying the origional in text mode as opposed to photo as this will also influence the copy quality if you try to copy an item that is more of an image but have the machine set to treat the image as text.

If cleaning the optics doesn't help----How do those image units look? What's the meter count on that machine?

[davidj7]

Re: C220 copy quality issue , print is fine

Hi blaze
the meter count on the machine is 172,000. The prints are 100% perfects only copy show Image quality defects.If you compare the internal test print of print and copy you will see noticeable quality deterioration in copy .So the laser and drums are okay. I ve cleaned the glass and mirrors.

[blazebusiness]

Re: C220 copy quality issue , print is fine

Hi blaze
the meter count on the machine is 172,000. The prints are 100% perfects only copy show Image quality defects.If you compare the internal test print of print and copy you will see noticeable quality deterioration in copy .So the laser and drums are okay. I ve cleaned the glass and mirrors.

Understood. Copies will never look as good as prints.The darker parts of the gradiation copy look ok---Only the lighter parts of the origional look a little washed out. Again--copies will never look as good as prints. Are you copying the image in text mode? Also the top and bottom of the image shows some variation in density when I compare them in your example which speaks to me of image units or some cleaning item. Things you can try to help variation:
Clean Charger wires with wire cleaning tool
Clean PH windows using cleaning pad assy

[davidj7]

Re: C220 copy quality issue , print is fine

hi blaze,
i know copies will never look as good as print but i have much better gradation copies . As you said 80-100% fills are fine , lines appear in 80-50% , less than 50% its hardly visible.You are right on density difference in in board and out board end , the inboard end is lighter.

blaze these prints were made in extended service mode ,gradation adjustment copy/print.

What do you mean by "Clean PH windows using cleaning pad assy". I dont have much experience on KM

[blazebusiness]

Re: C220 copy quality issue , print is fine

bizhubC220_C280_C360 ph window cleaning.pdf
bizhubC220_C280_C360 main charger cleaning.pdf

[davidj7]

Re: C220 copy quality issue , print is fine

Oh yes I have cleaned both , I just wasn't familiar with the terminology.

[blazebusiness]

Re: C220 copy quality issue , print is fine

Oh yes I have cleaned both , I just wasn't familiar with the terminology.

Then your variation is due to the image units. Just doesn't show up as much in prints yet because images when you print are much stronger. That's my best guess. Hope that helps.

[davidj7]

Re: C220 copy quality issue , print is fine

OKay I will check that and revert back to you

[PeterG]

Re: C220 copy quality issue , print is fine

If I am understanding you correctly, those images are the ones when you are doing the gradation.
That is normal. They all do that.

[RRodgers]

Re: C220 copy quality issue , print is fine

Hi
I have attached 2 images one is 'image gradation -print' its perfectly okay and the other is 'image gradation -copy' which is having image quality issues in all colours.
I have done basic cleaning of the glass, mirrors but no change . I havent touched the CCD .
I am trying my hands on KM for the first time .

Its basically a copy problem so any ideas on where I should start .

Thanks
David

I've learned a LONG TIME AGO (back on the 8020) NEVER EVER, EVER copy these and expect them to look any good.

[davidj7]

Re: C220 copy quality issue , print is fine

peter, rrodgers@ copy is the internal extended service mode copy and not a copy i have taken from the platen glass.It used to come perfectly like the " gradation-print " till a few weeks back.

[EarthKmTech]

Re: C220 copy quality issue , print is fine

peter, rrodgers@ copy is the internal extended service mode copy and not a copy i have taken from the platen glass.It used to come perfectly like the " gradation-print " till a few weeks back.

They never look the same as the gradation print even out of the box, period.

What you're seeing is normal and not a fault.

[davidj7]

Re: C220 copy quality issue , print is fine

i am getting image quality problems in copies with copy being light in the inboard side . the gradation prints i ve attaches started going bad at the same time so for easier comparison i ve attached that.

I have been working on copiers/printers long enough to understand the point all of you are trying to make and i know i cant expect the same quality in copies and prints .I get that ,but when one fine morning i get copy quality issues and one side is lighter than the other and i get small horizontal lines in copy only i know something is wrong . Please understand that I didnt have this problem in copy till few weeks ago.

[Gaffers01]

Re: C220 copy quality issue , print is fine

Right as previously said by someone else, the prints that you have attached to your original post are normal, every one of these model machines new from the box look like that.

You need to show a copy from the platen so we can have a look at the actual problem that you have not the Graduation sheet.