On Tuesday, 30 July 2013 08:58:06 UTC+1, Brian Gaff wrote:
Can you not get spares for this psu then? Often power amps run on higher voltages, so don't be surprised if its up to 35 volts. I'm assuming the psu is inside the woofer box, which means you cannot replace it unless you know the type. Currents can be quite high, particularly for small sub woofers as they tend to have longer throws and ported cabinets. Often though it is just a stupid bridge rectifier which goes blowing a fuse. Brian -- From the Sofa of Brian Gaff Reply address is active wrote in message ... Hi All, My daughters Logitek PC speakers are suffering from warranty expiration (I don't know if she's kept the receipt anyway). There is a "Subwoofer" (4" speaker in a 6" cube) and a pair of satelite tweeters. Also in the box is a switchmode PSU (dead) and and all the other gubbins on a single board including an amp on a chip. Any ideas what the output of the PSU should be? I am thinking maybe 5V at around an amp or two, or 12V at around an amp or two. I can try with a 5V and work up from there, but I thought i'd check here in case anyone has the definitive answer, or a very good guess (maybe amps always need 12V??) TIA Chris

It's possible I could get spares Brian, but not easily, and also I don't have sufficient knowledge of electronics to fault find. Also a lot of it is SMT, and i've no rework facilities. but I do have a number of dead wall warts and laptop PSUs, so if I can find something that will drive the remaining electronics, that will be a quick cheap and simple fix.