Question about Harman Kardon HK595 Computer Speakers

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I plugged my 110 v speakers into a 220 v outlet. Stupid, I know. Of course they don't work now. Any ideas what I should do? I want to check the fuse but am not sure where they are located. Please help!

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Usually, the circuitry is located inside the speaker with the power cord.
If you open this speaker, you will find the power cord attached to a small circuit board. If you trace the circuit starting from the beginning of the power cord terminals, you will first find the fuse (if any). The fuse is usually marked by an uppercase F printed on the circuit board. If you find it, you can test it using the continuity test on a DMM. A good fuse will read almost zero ohms.
If you did not find a fuse, then the most probable problem you might have in this case is burnt out rectifier diodes. There are usually 4 of them connected as a bridge rectifier, and these are usually burnt out when they recieve excess voltage or current.

Posted on Nov 13, 2009

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