LL Cool J Back On Set After Taking Down Alleged Burglar

It's the first time we've seen LL since the incident ... and of course, the rapper/actor didn't have a scratch on his body ... unlike the home invader, who suffered a broken nose and jaw when he messed with the wrong house on August 22.

We tried to ask LL about the situation as he was walking to the Santa Monica set of his CBS show yesterday, but he was too "in the zone" with his scene to answer questions.