Let me try and do a better job....... This machine is so dreaded awful that it has been discontinued and the reviews are horrid, because of this there is no support. the best solution is typically find someone with it and ask them to share. Never the less I still spent more time looking for it. Because I want you to get what you came here for I did find a solution.
Manufacturer Info
1.800.524.0799
its actually to the point this company does not acknowledge this item anymore and does not offer support.
Then this https://www.cashregisterstore.com/Programming-Manual-in-PDF-Format-for-Royal-310DX.html company says they will sell it to you for money(at your own risk this is not an endorsement )
this looks promising check here https://www.howtomendit.com/answers.php?id=470331
They will be able to get you the information your looking for . I would have contacted this company for you but they are closed. Good luck
https://www.6ya.com/mr.mike
The continuous running tends to be that the sensor that detects that there is material still to be shredded is either dirty or has some paper stuck in front of it.
It is hard to tell what is causing this but a few things to could be a loose universal bar, the trip adjustment, or something foreign in the typewriter stopping the movement of those keys
