hifi engine

Pioneer QX 949 manual needed

I just got a Pioneer QX 949 receiver as a gift and I am looking for a manual for it. Any help would be greatly appreciated! Also for future reference, any recommendations of qualified service people? It works fine,but there is some noise in one of the knobs, and it seems like the mode knob is cutting out sometimes when I switch modes. I am thinking about bringing the receiver up to "new" again since my investment so far is nill!
I live in St. Louis. Thanks!