Konica Minolta 4 series color gradation adjustments or calibration

To calibrate color accuracy and fix fading on a Konica Minolta bizhub 4-Series machine (e.g., C224/C364), press the physical Utility/Counter button. On the touch screen, navigate to Administrator Settings, enter your admin password, and select System Settings -> Expert Adjustment -> Quality Adjustment -> Stabilizer. Run the stabilization first, then return to the menu and select Gradation Adjustment. Choose Copy or Print, tap Stabilizer followed by Test Pattern, and press Start to print a calibration chart. Place this sheet face down on the scanner glass, align it, and press Start to scan and automatically recalibrate the color depth.