AMERICAN AUDIO VLP2500 SERVICE MANUAL PLEASE!

[DJCAP]

Hello!! I would appreciate if someone can help me. I need the american audio VLP2500 SERVICE MANUAL. I have a strange issue with my amplifier. Some times I'm in the middle of a party and if the music is loud the sound goes down and up, so I turn down the volume and the amplifiers continues working Ok but I feel there's something wrong because this issue shows up after 2 hours of a common party. Last day I've noticed that one of the cooler fans wasn't working but the sound in both channels were ok.
I checked it yesterday and both fans are working, so I'm confused. Maybe some component in the protection circuit is out of range. Well, Idon't know.
But if you know about related issues, I would appreciate your help and support.

Thanks and regards!!