if your amp is a version one like mine, the fuses are below the power switch, right below where the power cord plugs in. there are 2 3amp slow blow fuses in a small cartridge, you will need a flat head or something of the sort to pop the cartridge out. if you look very closely at the photo of the amp on the right, you can see a black box looking area below the power plugs, that is the area i am referring to..

JC had to tell me where the fuses were for my amp, i had no clue either....