Bizhub C451, C225B error code

[lwals2015]

Hi all.

Need help please. C451 with C225B error. The error indicates that the black drum motor has failed. We replaced the main drive unit but the error is still popping up.

Any idea why this error isn't going away?

Regards

yes its power board

[muhammadreza]

Every time i face this code i change power supply. after changing power supply machine working smoothly .