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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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The power supply or amplifier has a shorted component.

Posted on Mar 12, 2010

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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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Polk subwoofer suddenly quit--the on-light doesn't even come on

most likely it is just the main in line fuse that could of went bad an thats cheap an easy to replace look for the fuse housing should have a flat tip screw driver groove just tun it counter clockwise an it will come out they are spring loaded so it will only take a half a turn to remove it then copy down the fuse type an amps an go get a new one an try it then u can se if the fuse is bad just buy looking at it if its metal binding is broken then get a new one if you can not see into the fuse then read it w/a ohms meter to see if its bad

Mar 28, 2010 | Polk Audio PSW202 Subwoofer

3 Answers

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.

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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

1 Answer

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

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