Most compounds have a specific 10# or so draw weight range which they can be set at, with the upper limit of the range reached with the limb bolts fully tightened. From there you can lower draw weight by backing off the limb bolts until the lower end of the range is met, typically no more than 3-4 turns.

With that said, I have no specific knowledge of your exact bow, and would recommend you take it to a qualifie pro-shop to let them give the bow a general inspection for safety and set up if you don't feel comfortable/qualified to do it yourself. It will be well worth the few bucks in shop time they charge you in the long run...