I am stumped on an error code C225B in a Konica Minolta bizhub C451.K PC druure to turn The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning.I followed the instructions to a 'T'.Checked all the connections - still fail...Replaced M18 - still fail...Replaced PRCB - still fail...Error code C225B remains...The only thing I couldn't do is the "M18 Operation Check"Despite my best efforts I have not found any information on how to do this.HELP PLEASE