Hi, i recently hooked up my amp. the power light is not comin on and the subwoofers are not powering on. I decided to open up the back of and I see where something on the inside looked burned. I'm guessing this is the source of the problem. I dont know the name of the part that looks burnt out burnt out but it is located on the sides, and there are several of them in a row on both sides of the amp. It looks like a silver bar that is screwed in holding down two pieces of metal that are connected to the circuit (this is the part that looks burnt.... Please help
Sounds like the semiconductors, probably the MOSFETs or output transistors. You can google the part numbers to find out what they are. If you're planning to replace them, remember that they ALL should be replaced at the same time (even the ones that look & test okay) and should all be purchased at the same time from the same manufacture lot. You should also check the resistors near them with a DMM and replace as needed.
yup, sounds about right. what did you pay for this amp, cause it could cost close to the cost of a new better amp to repair.
I paid 50 for it. From a friend of a friend. I've started doing some research on transistors and mosfets and pretty much understand how to fix the amp. I found the mosfets I need on digikey.com. I just bought a solder iron from radioshack... By the way, after removing the burnt out mosfet, the power light came on but it stayed in protect mode.. So do you guys think its worth it to try and fix this amp? never had a car stereo system or dealt with electronics and wires, so Im just excited and ready to have a nice system. any suggestions...
Sounds like it's worth a try at least for the experience if nothing else since it will probably cost less than $20 to do it. If you haven't already, make sure to get some desoldering braid or a desoldering pump (it will make your life MUCH easier ) plus some heat sink compound to put on the back of the FETS when you put them back on. Also, don't connect power to the amp when the rails are off of it since the output transistors will blow within seconds if they're not against the heat sink.
