I have a (optimus stereo amplifier mpa 250) Every time I turn it on the fuse blows, I have it connected with the right stuff so I am not over ridding it. I disconnected everything from the amp and it still blows the fuse every time I turn it on. Not sure if I miss connected something when I dis-wired it again. Please guide me with this issue, I've been threw Two fuse bags and can't afford to go threw more. Should I get it checked by a professional or what? Please help out someone. Thanks.
That fuse collection is saving your amp. You've got a short circuit in it somewhere. Needs checking out. Take the cover off and look for burn marks in the mains-in part and on the circuit boards. You might have a burnt-out resister or capacitor somewhere or a badly screwed up transister especially in the output stage. Power transisters can get hot. They have heat sinks they get bolted to and heat paste to make a good junction so the heat gets transfered better, Check the wires all round for molten or burnt insulation. Sometimes it's just dust that builds up inside that causes the problem especially in vintage amps that may have running twenty years without a clean out. Sometimes it's insects that get burned to a cinder and form a carbon bridge between components. Carbon is a good conductor and then you get a short circuit. Make sure the plug is out of the wall socket and give the amp a brush out with a vacuum cleaner nozzle held close to the brush. A 1-2 inch house painting brush works fine.
