C280 cyan uneven problem

[pinoyprinter]

I have a uneven print problem in c280 in cyan only(the drive side is darker than the front side and occurs after printing 2 copies).
When i print full color black it was ok. i have replaced transfer belt, transfer unit, drums, developing units and I was able to upgrade firmware, but it didnt solved the problem.
I am thinking to replce the ph unit of cyan..
is there anyone who encountered this before ? (il post the image later)
many thanks..

[AjitN]

Hi
Please check with 50% patch of all CMYK, not 100% as it will not show uneveness. I think it will be in all colors. Also there is no seperate PH unit for Cyan.
Ajit

[CKiiza]

To start with if you can scan that uneven cyan printout and post it, it will be easier to know what you are experiencing.
I have encountered issues like that some times and found it to be solved by resetting the functions in "imaging process" in service mode back to '0' (that is as long as '0' was the factory setting.) check those functions apart from gradation adjustment and see what you can get out of them.

[pinoyprinter]

thanks for the reply. The problem was a limitation of the machine with the cyan color in the image file from client.