Konica minolta alignment issue c253

[junidexy]

I have konica minolta c253 copier, i have problem in the yellow image unit, the print is come lighter, when i check it low developer, so i change the developer, after that i have problem in the alignment , i replace the unit also , have same issue, i change all 4 units , i have smae issue, how can i solve this, please help me ??, image is attached in this

[JustManuals]

Re: Konica minolta alignment issue c253

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[Toxic]

Re: Konica minolta alignment issue c253

You have to adjust ph units and do calibration.
If you are not tech i would not recomend to do it yourself.