C500 Miss Alignment of Color

[Oxford XX0]

Hi, everyone

I have this bizhub c500, you will see the color is not one above the other they have a big decree of alignment error and it is very bad.
The c500 did have sc45-20 error and I did the Auto. colour registration adj or some times the colour registration manualAdj. and it did cancel the sc45-20 error then I clean the color reg sensor so I hope I will end the sc45-20 error for good.

The Miss Alignment still exist and I don't know what to do. I attach some scan from the printer.

Thanks.