Bizhub c6500 Icp4 on adu board keeps burning

[mircea]

Hello
I have a problem with an c6500.
Like 2 times a week it starts to paper jam any paper printed on duplex and everythime its the same problem. The cable from The duplex motor is out. If the cable is not out then the icp 4 on adu board is burned.
Already changed that motor and the board.
Any idea what else can be done?
Thanks

[Toxic]

Maybe to check wires from pcb to motor for damaged insulation and get shorted to ground of machine...