Broken DSW PRO 400

Broken DSW PRO 400
I have bought this in Sweden at "Net on Net" but now they do not sell or repair this anymore.
now i have found service shop that can fix my speaker but he can't get the blueprint schema for the DSW PRO 400. I have mailed polk audio to time. no reply!
I have try to find the blueprint schema on trhe and try to talk to polk audio prtner in Norway Oslo, they say that the will help but never come back to me.

I need help here!



  • KennethSwaugerKennethSwauger Moderator Posts: 6,846
    Welcome to Polk's forum. I'll ask someone at Polk to contact you and provide the amplifier's schematic.
    Regards, Ken
    "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.
  • KennethSwaugerKennethSwauger Moderator Posts: 6,846
    Polk's Ken Carter has responded that he has asked for the schematic and should have it in a day or two.
    "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.
  • Hi. I have a DSW 400 Pro, bought it brand new in Dec 2008. Worked until this year, then died. Took the back off and found that a diode on the power supply board blew. Replaced with exact diode and the unit worked for about a week and then died again. The same diode blew again. All other components look good on the power supply and amp boards.

    Are you able to help me diagnose the problem?

    The diode is right between R4 and D4, and seems to be identified as TVS1.
    The diode number is P6KE180ALFCT-ND and it's destqhc97hjy7s2.jpg
    cription is "TVS Diode 154VMW 246VC DO204AC".

    I need to find out what is causing this diode to overload.


  • gw936gw936 Posts: 4
    Hi, I have the exact same problem. Did you ever get an answer to this or solve the problem?
    Much thanks.
  • itinkeritinker Posts: 2
    I too, have the exact same problem: DSW PRO 400 failed TVS Diode. Pictures of my board would look identical.

    Any updates as to the cause of failure and fix. I called Polk inquiring about a schematic and any related Technical Service Bulletins that may be available, their Customer Service was not very helpful and could not provide anything.

    Thank you in advance for any insights.
  • KennethSwaugerKennethSwauger Moderator Posts: 6,846
    Send an email to: [email protected] and ask for assistance.
    "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.
  • itinkeritinker Posts: 2

    Thank you. I will contact Mr.Carter.
  • I've got the same problem. I'll contact Mr. Carter as well since that's all this forum leads to unless I can get any other positive assistance.

    What I wanted to share was my experience with Polk Audio Support/Customer Service.....absolutely terrible! I've gotten such a runaround on trying to order a replacement amplifier for the Pro 400 I'm at the point of never purchasing another PA product again. The part # given for the amplifier from [email protected] support was RF8008-1. When I called to check over the phone on availability/pricing (if you can actually speak to a person) I was advised this part was no longer available, and I'd have to purchase the one for the newer model 440 for ~ $260 (sorry don't have that part # on hand), and was told the 440 amplifier was interchangeable with the 400. Instead of buying only the amplifier I opted to buy a used Pro 440 off Amazon thinking this would allow me the ability to have spare parts between the 400 and 440 if ever needed. The 440 amplifier is a completely different amplifier with different connectors. So, I ended up returning it. I proceeded to call customer service and question why they stated these amplifiers were interchangeable since the power rating wasn't even the same (440 - 80watts, 400 - 160watts). The gentleman was rude and started to argue with me stating the size of opening for the amplifier was the same the 400 and 440, but no regard that the actual power specs were different, haha seriously!

    I've emailed both [email protected] and [email protected] on my experience but crickets thus far. It's quite disappointing that customer service can be this low, and such a disconnect on information when trying to order replacement parts instead of going out to buy a whole new sub. I get this sub is older and no longer warrantied, but getting the correct answers and positive customer service would go a long way.

    Sorry for the long rant here, but felt I should share my experience somewhere so it's visible.

    Disappointed Polk Audio Customer
  • F1nutF1nut Posts: 42,966
    It's a damn shame that the current higher ups at Polk have failed to realize the importance of excellent customer service that the original owners of Polk fully realized.

    Kevin Duffy, are you listening!?!
    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

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