SWA500 amplifier sudden zombie-mode

I've got a fully-kitted out media room with Polk 265-LSs and 80F/X-LS. Part of that setup is the SWA500 amp + 2x CSW100s, which worked flawlessly for over five years until last week.

There's no sound at all coming from the subs. I've checked the subs with another (dinky) amp and they work fine. I've double checked all settings on my receiver and everything is as it should be. Checked all wiring as well. Everything seems fine except the SWA500.

On the SWA500, AUTO is what I've been using - and the green power light did used to switch to red when no signal was sent after a few minutes. Now it doesn't.

The green light is 'on' (whether it's ON or in AUTO). It's red when switched to STANDBY.

The protection light is not on.

Bummed, I contacted customer service. Kim suggested I send it in for repair if it's still under warranty. It isn't (I bought it August 2013). I've asked her to provide me with other options - perhaps I can get new parts for it. I haven't heard back yet.

I've taken a peek inside and it seems that the power supply board is shot. There's a yellow capacitor that has had its magic smoke escape (photo attached).

Perhaps I could get a replacement for this board?

I understand this is a busy time of year but I do miss my bass and would appreciate Polk's assistance in getting it back.

Is there a parts department I can call?

Thanks

3b4vbidigkmb.jpg

Comments

  • F1nutF1nut Posts: 42,677
    Kim is a man.

    You can get the values off the existing capacitor and buy a replacement online.

    Polk doesn't have a parts department as such.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • hishamkhishamk Posts: 6
    edited December 2018
    F1nut wrote: »
    Polk doesn't have a parts department as such.

    With all due respect, this doesn't make sense. A premium brand like Polk must have a parts department or at least an out-of-warranty repairs department - at least for products that are still being sold (which the SWA500 is).

    I don't think it's good practice to expect customers to dump repairable products in a landfill. I don't think anyone does. One less thing our planet needs.

    Bowers and Wilkins, B&O, Cambridge Audio, and Linn all support ancient products with a parts catalogue and/or out-of-warranty repair services.

    Yes, I can go ahead and try to replace the cap by myself, but I don't think the issue is as simple as replacing a cap from reading online. I would think it would make sense to send in the board to Polk for QA analysis and get a replacement. If Polk does say it's the cap and it's a known issue - then I'll gladly pull out my old soldering iron and give it a go.

    If anyone from Polk is on here that cares to jive in, that'll be appreciated.

    Thanks


  • KennethSwaugerKennethSwauger Moderator Posts: 6,846
    Hello,
    Polk does have a service department, it's located at: Polk Service, One Viper Way, Vista, CA. 92081. You would send the amps there along with a short note giving them your name, address, email address, telephone number and a copy of your sales receipt. Polk will quickly evaluate them and contact you with what they find.
    I hope this is helpful.
    "They thought we were too loud, but shoot, I had four army blankets folded over my amp, and the volume level was on 2. I'm used to playin' on 10!" S.R.V.
  • I hope this is helpful.

    It is, thanks. Though I was hoping - since it's out of warranty - that I could just order a replacement power board and send in the burnt one for analysis.

    The reason being is that the amp is located outside the US and it would cost upwards of $250 to ship.
  • KennethSwaugerKennethSwauger Moderator Posts: 6,846
    You might want to continue communicating with Kim ([email protected]) and ask if there is an importer/service capability in the country where the amp is located. Or, if he can provide an amp schematic and a reliable local service company could use it to troubleshoot the amp.
    "They thought we were too loud, but shoot, I had four army blankets folded over my amp, and the volume level was on 2. I'm used to playin' on 10!" S.R.V.
  • You might want to continue communicating with Kim ([email protected]) and ask if there is an importer/service capability in the country where the amp is located. Or, if he can provide an amp schematic and a reliable local service company could use it to troubleshoot the amp.

    Did so and received a reply today from Kim. Unfortunately no schematics are available.

    I've asked him if there is any other recourse like purchasing spare part boards or out-of-warranty service. No response.

    I'm really trying not to relegate this to the landfill and buying a whole new one :/
  • It seems the SWA500 is "on backorder". Is there an ETA on that?
  • F1nutF1nut Posts: 42,677
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."


    President of Club Polk

  • WLDockWLDock Posts: 2,623
    edited January 4
    hishamk wrote: »
    I hope this is helpful.

    It is, thanks. Though I was hoping - since it's out of warranty - that I could just order a replacement power board and send in the burnt one for analysis.

    The reason being is that the amp is located outside the US and it would cost upwards of $250 to ship.
    Many subwoofer amps are made with low cost boards assembled overseas. Some companies don't bother with repair nor do they offer replacement boards. Such is the case with the Polk SWA500. I purchased one off eBay for cheap as a repair project but the PS board was badly burned and I found out replacement boards are not available awhile back.

    In your case, it would be best to see if a local repair tech can fix it. If not, replace the amp with another SWA500 or something cheaper like a Behringer NX1000D 0r NX3000D w/DSP available for £199.80 / £232.95 in the UK vs. £629.00 for the SWA500. You may need something like an Art CleanBox converter to drive the amp properly depending on the output voltage from your AVR. https://www.amazon.co.uk/ART-Cleanbox-Pro-Stereo-Converter/dp/B003S7T49K/ref=sr_1_5?ie=UTF8&qid=1546618890&sr=8-5&keywords=Cleanbox

    Behringer NX1000D
    Watts/Side @ 8 ohms: 160W x 2
    Watts/Side @ 4 ohms: 300W x 2
    Watts/Side @ 2 ohms: 500W x 2

    Behringer NX3000D
    Watts/Side @ 8 ohms: 440W x 2
    Watts/Side @ 4 ohms: 900W x 2
    Watts/Side @ 2 ohms: 1500W x 2

    http://www.musictribe.com/Categories/Behringer/Power-Amplifiers/Portable/NX3000D/p/P0CHW

    https://www.amazon.co.uk/Behringer-NX1000D-Range-Ultra-Lightweight-Amplifiers/dp/B07GS3JDNJ/ref=sr_1_1?ie=UTF8&qid=1546618685&sr=8-1&keywords=Behringer+NX1000D

    https://www.amazon.co.uk/Behringer-NX3000D-Range-Ultra-Lightweight-Amplifiers/dp/B07GSB6CRC/ref=sr_1_1?ie=UTF8&qid=1546617734&sr=8-1&keywords=Behringer+NX

    https://www.amazon.co.uk/polkaudio-SWA500-Power-Amplifier-800W/dp/B003GTCD48/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1546617686&sr=8-1&keywords=Polk+SWA500
    Post edited by WLDock on
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  • hishamkhishamk Posts: 6
    WLDock wrote: »
    Many subwoofer amps are made with low cost boards assembled overseas. Some companies don't bother with repair nor do they offer replacement boards. Such is the case with the Polk SWA500. I purchased one off eBay for cheap as a repair project but the PS board was badly burned and I found out replacement boards are not available awhile back.

    In your case, it would be best to see if a local repair tech can fix it.

    Thanks WLDock. Appreciate the advice and alternatives listed.

    I checked around and managed to get a new SWA500 for around $360 net shipped so it wasn't too bad considering if it was repairable I would've probably paid as much.

    Still keeping the old unit and will try to fix it. I ordered a couple of new caps and will give it a go once they arrive.

    I really think legislation has to force companies to honor service/parts for all products that are currently being sold (or discontinued for less than 5 or 10 years), even if they are out of warranty (paid service/parts that is).
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