Question about Polk Audio PSW110 Subwoofer

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No power to my PSW110

Im pretty sure the fuse is blown because my sub isnt getting any power....problem is that i cant find the damn fuse to check it...anyone know?

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  • demondriven Sep 10, 2009

    Thanks for the help. I found the fuse, replaced it and now when i plug it in the power supply starts to gets really hot starts to buzz and smells like melting glue or something...does this mean that my power supply is blown or is there a simple solution to this?

  • Dave algiere Jul 06, 2015

    What did you find out on this speaker? I have the same issue . No power , havent opened it up yet , wondering it its even worth repairing.



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The fuse may be located in several spots:

- fuse inside the three prong power plug connector on the sub (if there is one) - see if it has a fuse compartment built in - it should slide out kind of like a small drawer - sometimes it has also a separate place for a spare plug in there - the fuses used are of glass type.

- fuse mounted into a fuse holder soldered onto the circuit board - glass type fuse

- fuse soldered directly onto the circuit board - sometimes the type used is glass (it may have a heatshrink tube around it so it doesn't look like a fuse at a first glance, also there are other types of fuses that can be soldered directly onto the board - these are in the form of a small vertical cylinder, usually of a dark reddish colour with white / yellow print on the top - they look somewhat alike to small electrolytic capacitors, but are encased in dark red plastic with the pins located directly underneath the fuse.

Hope you can find it...


3rq8 (Triarcuate)

Posted on Sep 10, 2009

  • 4L60B4R1UM Sep 18, 2009

    Obviously there is some component which is either partially or fully shorted that makes the fuse blow, and this could be either in the power supply itself or another section (the strong buzz indicates an increased current consumption in the system, the component that is heating up is one possible cause, other components connected to that one up are other most likely causes).

    See if any of the components have visible damage (bulged electrolytic capacitors, burned resistors, diodes, transistors - could be just about anything).

    If you spot any damaged parts, have them replaced, however, there may be other parts which may not have any readily visible damage to them and will require some measurement, so it is advisable to have any such repairs done by a skilled tech because further damage to the system may occur if you try to operate it while there is still a fault present (the blown fuse is just a protective reaction of the system that draws too much current because something is shorted in it).




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