4101 error code

[NIKIL.KP]

hi i am facing problem in bizhub 950,it gives 4101 error code after initializing as per manuals i checked the connectors,writing unit,polygon motor and i swaped the writing unit assy and dc power supply 2 with the other machine and it works well but in that machine it gives the error code.have anybody faced it before.please help


thanking you

[ebm]

Looks like the PMDB is connected to the PRCB. If you have eliminated the write unit and power supply, this might be the next step. The write unit is also connected to the OACB.