Im pretty sure this is the system that I have. Bought it in 2005, worked for a few years, one day, went to turn it on, and there was no power, replaced the fuse, and the second I turned the main switch in the back on, I heard it pop the new fuse. Any ideas
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Re: Short Circut, blows fuses instantly.
OK usually the fuse goes because the Amp's IC's are drawing too much current thus the fuse blows... either this OR the Power Supply has gone Kaput. It is possible to replace the output IC's.. as it is to fix the PSU.. But it really is a shop job..
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I have a suggestion that you can try. If the unit is no longer turning on and you're sure the electrical outlet is good (by plugging in another device) and the hand-held control panel is on, as well as the switch at the base of the subwoofer, then try replacing the fuse. The subwoofer on this model has a fuse near where the power cord enters the subwoofer. There is a slotted screwdriver slot on the fuse cover. Using a flat-head screwdriver (or your thumbnail), turn the cover about a 1/4 to a 1/2 a turn and the fuse should pop out. Keep the cover. Replace the fuse with a 4 amp, 125V (or higher) fuse that is a slow-blow fuse. There are fast blow (or fast acting) and slow blow (or slow acting) fuses. You can't replace one for the other. You should be able to find a fuse at Radio Shack. If a new fuse doesn't get your system working again, then something else is broken. Good luck.
Hi, Yes I have had these for many years. Work great. However there is a resistor that has been known to fry. Due to the connector plug (which is a flaky round pin connection.) arcing and once that happens it. You get current overloads, hence fuse blows. Unfortunately parts are scarce and not label easily to get replacements. So I just bought new
myhairsonfir i did the exact saem thing today im gutted! im also in south america (chile) so found your post to be remarkably similar, though if im honest i only just went out and bought the transformer after it did not work. Have you managed to resolve your problem? did you get a new fuse? I hope to hear from you. Tom
The problem is a burned transistor inside the subwoofer. It depends of country's transistor manufacturer. It is supposed to be of a low quality. It's not important for the scope. Mine is knocked down for a year. I saved the electronic schematic diagram and the transistor specs, but lost. I confirmed the cause opening the subwoofer and examine the board. The indicated transistor surrounded area is burned indeed. If anyone find the article in web, please, post here.
When fuses blow theres a problem, now how it blows help you find out where the problem is, If the fuse flashes and turns black the second you turn it on or plug it in there is a massive short in the power supply, If it blows but is clear the surge was not a dead short but a overload, Either way best to run it down to the shop and get it looked at
Depending on your country, and voltage, you may need a voltage regulator, or a Battery Backup to keep the fluctuation of energy at line. regular will be 60Hz. so is better to start on that solution first.
Go to Logitech support and check the faq's on your speakers. You must replace with the same fuse and it may be a 3amp slow blow fuse. If so replace with the same fuse or you will just keep blowing them out.
Sounds like a short circuit or a defect inside the circuitry that is allowing more power to flow through, thus blowing the fuse. My advice would be to dispose of these speakers for safety reasons and invest in a good quality set.