Xerox DC 770 - Paper jam from all trays

Hello, I`ve got a problem with a Xerox DC 770. There is paper jam with every sort of paper and from all trays up from the first sheet, which stops directly after starting the job. Has somebody an idea, could it be a motor, sensor or another hardware damage? Thanks a lot!

 

Now I got the error codes. It seems to be a problem with registration sensor. But how can I check this out and repair?

071-105 from tray1

072-105 from tray2

075-135 fromt tray 5 (bypass)