I am new to this forum, but after a little browsing Im happy to be registered

I recently got a Phase Linear 400 amp and preamp to use at a small lounge in New Haven, where I DJ. Personally I didnt know anything abt the amp or PL, but after some reasearch there is obviously some history behind the amp. I am planning on just using the AMP for now, bc my mixer will serve as the pre-amp source.

Problem is, it blows the fuse as soon as I plug it in. Orig there was a 5A fuse which was blown but I tried a 10A and 15A (thats all that was in my house). Im trying to determine if 5A is the proper fuse and if there is anything I can do to fix it or diagnose it. Im not to versed in amp/electronics repair but if it something simple, Im willing to give it a try. Or, if it can be diagnosed and repaired inexpensivly, I would have no prob doing that.
Also, Ive been trying to dig up some literature (instruction manuel or whatever) so that I can get a heads up before this thing gets plugged in...can anyone point me toward that kind of thing??

Thank you!

nate