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Polk Audio PSW202

I install a new fuse and plug in my subwoofer and it continually blows fuses.

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First you have to check any short circut , that may be inside of sub woofer unit .
find and sove any short circutry and then only replace the fuse with same rating.
and before you switch on it once again recheck any meterial shored with electronics pcb.

Posted on Nov 12, 2008

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Polk Audio PSW202 subwoofer. Replaced burnt fuse but blows the next fuse after connecting to amplifier and powering on. What else can I do?


Fuse probably went bad because either the large filer capacitors at the edge of the PCB went bad and or the final output IC mounted on the heatsink(15 pin) fried. Check the capacitors and all the semiconductor components on the board for burn marks or corrosion. You have to remove the heat sink clamp from in front of the output IC to adequately visualize its condition. In fact you might have to remove the large aluminum heatsink attached to the chassis to get a good view of the IC. If it or the heat sink clamp show signs of thermal burns you need to replace it. The IC is a TS TDA7294 mono audio amp available at Mouser Electronics. Replace the 35V 4700mF caps with 50V 4700mF caps. You will only have enough space on the top of the PCB for one of the larger caps. I mounted the other on the circuit side of the board. Note the polarity of the original caps and respect it in their replacements. The fuse is a 5 X 20 medium speed slow blow 250V 2.0A glass fuse.

Aug 17, 2010 | Polk Audio PSW202 Subwoofer

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Blew a fuse what kind dose it take is it a slow blow fuse or fast blow one,i took out the old fuse and it reads le.3a/250v is it a 3a or .3a


It is a 3A/250V fuse, also known as a 6A/125V fuse.

Power amps generally have slow blow fuses.

If this is helpful, please be sure to hit the "Thumbs-Up" for me!

Jan 24, 2010 | Polk Audio PSW202 Subwoofer

1 Answer

Fuse blows, replaced the two capacitors and it still blows fuses... sub is fine and not blown...what else could it be??


If your sub is made to be used in other countries check to make sure it hasn't been switched to a different voltage.

Dec 18, 2009 | Polk Audio PSW202 Subwoofer

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PSW202 now has buzzing sound. Was slight, not it is loud. Saw the fuse solution. What about the 35amp capacitors?


Mine does the same, even at low volume/frequency. Let me know if you ever find out why.

Oct 28, 2009 | Polk Audio PSW202 Subwoofer

2 Answers

Dose'not work the light dose'nt come on


if you can try and open it up and see if there is a fuse inside of it it might of popped

Sep 30, 2009 | Polk Audio PSW202 Subwoofer

1 Answer

The sub doesnt turn on no more...? why?


check the internal fuse. near the power cord there is a round modual that you can unscrew. once unscrewed you will see a fuse in there. make sure it has not blown. if that is not it make sure the sub is switched to on and not auto. on auto setting it will turn itself off if no signal is detected.

Aug 05, 2009 | Polk Audio PSW202 Subwoofer

1 Answer

Polk Audio PSW202


The power supply or amplifier has a shorted component.

Nov 08, 2008 | Polk Audio PSW250 Subwoofer

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