Canon IR8070 paper jam infront of Registration roller

[selva]

Hello Sir,
My copier canon ir8070 paper jam in registration roller. The registration Clutch 2 and 3 are not rotate. I will Part Check the two clutches. Clutches are working. Which problem please tell me Sir.

[vigour]

what is the jam code
how many copies on the machine
does it jam every time
does it jam from every cassette