DSWpro 550wi - Red LED - Is it gone forever?

I have a Polk DSW Pro 550wi (Wired via LFE) that was working great for the last six years.

Now, even with the subwoofer powered, it only stays on for few seconds (10-20 seconds), as per the front blue LED. On the back panel, as soon as I turn it on, the LED changes to green, and after few seconds (10-20 seconds) it changes to red.

I tried disconnecting from the electrical outlet, as per the manual instructions for some time, and got the same results (Red Led).

I live in Brazil, so I am not able to contact Polk Customer Service by phone and/or acquire a amp board. Can someone provide me a PDF of the electrical circuit of the amp board, so I can send it to an electrical techinician to check if are there any serviceable components?

Any help would be greatly appreciated.

Thanks!
Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
Polk Audio LSiM 704c MM Center Channel Speaker (Center)
Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)

Comments

  • MottaMotta Posts: 18
    Hello everybody,

    So I removed the main board of my DSWpro 550wi. Here it is:

    voffxtx4ulhv.jpg

    After a visual inspection, I found that R24 and R34 are damaged:

    rfbab8yoyhyd.jpg

    Tomorroow, I will take this board to an electrical engineer/electronic technician (yep, he is both) to check if these parts are replaceable or not and if there are any other parts tha need to be replaced. An electrical circuit schematic of this board would be helpful.

    I will keep you updated.

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • MottaMotta Posts: 18
    edited April 4
    Hello folks,

    Two resistors (R24 and R34) were replaced. Several measurements were taken after replacing these resistors and everything looked fine.

    So, my DSWpro 550wi is back to business...

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • monepolkmonepolk Posts: 850
    Hey glad you were able to fix it.
  • rooftop59rooftop59 Posts: 4,440
    So glad we could help ;) ...but I am glad you got it back up an running!
    HT Rig:
    Denon AVR-X4200w; Parasound HCA-1205A; Arcam rDac; Mains: Dynaudio Emit 10 + MartinLogan Dynamo (original) sub; Center - Def Tech Procenter 1000; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - SVS PB10-ISD; Sony BDP-S390, FireTV gen 2

    Master Bedroom
    Marantz SR-5007; Audiosource Amp Two, PSB Imagine Mini, Boston VR-10 center, NHT Super One CI surrounds, ACI Titan subwoofer, FireTV, Arcam rDac; Bryson BPD-1
  • MottaMotta Posts: 18
    Hello,

    Well, it did not last long... After 10-12 days of use, my Polk DSW Pro 550wi has presented the same problem as before (the red LED of death). So, there is something on this power board that it is blowing these resistors.

    Any assistance is appreciated.

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • afterburntafterburnt Posts: 4,425
    Can't you just order whole new guts from Polk?
    Parlor: ifi iDSD Micro*Yamaha RX-A2030*Parasound Halo P5*Parasound Halo A-31*Parasound 2250v2*Emotiva XPA-200 Gen1*LSiM707 Fronts*LSiM706c Center*LSiM702f/x Surrounds*Monitor70 Series II Rears*Monitor40 Series II Presence*SVS PB2000 Sub X2*OPPO BDP-103D*Sony PS3*Samsung-55" LED 1080p Smart 3D HDTV UN55H7150AFXZA*TEAC TN-300*Wireworld Solstice cables* Wireworld Stratus power cables*Blue Jeans Cable LC-1's IC's*BJC Silver-Plated IC's* Bens Silver IC's

    Dungeon: Dancer Mini-Two Diamond*Auralic Aries Mini*Dayens Ampino Preamp*Dayens Ampino Monoblocks*North Star Intenso DAC*Wireworld Oasis cables*Wireworld Oasis IC's*Wireworld Aurora power cables*IFI nano IDSD bl*Pangea Silver USB*Cambridge CXU*

    Panamax MR5100*Panamax M8-AV-PRO*Furman PST-2+6

    Headgear: Sennheiser HD 558*Audio-Technica ATH-M40x*Sennheiser HD 598 Cs*Audio-Technica ATH-MSR7*Philips SHP9500S* Sennheiser 6xx

    Hello Kitty boombox

    Spare sortta: Usher N-6361* ifi iDsd nano*Marantz 1504* RX-A1040*Emotiva XPA-1L Gen2 X2*Emotiva XPA-3 Gen2*CSiA6 Center*Monitor40 Series II*SVS PB1000 Sub*Sony BDPS6500 Blu-ray player*POS 37" LCD*Douglas Connection Furez 12 AWG 2 Conductor*Blue Jeans Cable LC-1's IC's*Samsung BD-H5900 3D Blu-Ray*Usher N-6361


    Self Control is over rated.
    Mr. Sharpe wrote: »
    Meh these were extra $70 as an open box item so it didn’t much to me either way:)

  • MottaMotta Posts: 18
    afterburnt wrote: »
    Can't you just order whole new guts from Polk?
    Hello afterburnt,

    I am not sure if Polk would send a replacement board overseas.

    Also, I was looking at other posts from this forum I read that a replacement board may cost approximately US$ 300.00. If we consider that the price of a new subwoofer on Amazon is US$ 319.95, a replacement board is quite expensive. Also, if Polk send this replacement board overseas, its final cost will be around US$ 800.00 including taxes and shipping.

    We identified that this problem is located on the power board (pictured above), so it may be fixable replacing some damaged components.

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • mlistens03mlistens03 Posts: 1,785
    Yikes. Glad you got it fixed the first time, but I don’t see anything that could cause them to fail that is obvious to my untrained eye. I’ll look for a schematic, and if I find one, I will come back and post it here. Just to be 100% sure, how hard are you pushing this thing? If your driving it to hard then that could cause it to fail, although since the driver isn’t dead I don’t think it would be that. Did it perform normally when it was working after the first repair?
    Micah
    Not Tom, or Trey, or Jim
    Main setup:
    Speakers are one of three, Mission Freedom 770 IV’s, Polk LSi25’s, or Polk SDA-CRS (stock XO, SL2000’s, Blade/Blade model). Electronics are as follows: for the LSi’s and SDA’s, a Technics SU-v75 acting as a phono preamp, into a Yamaha RX-v665, into a Crown XLi800 power amplifier. For the Missions, I have a Lafayette LR-1100. Turntable is a Technics SL-3200, with a Shure M97xE. Cables are generic/soon to be replaced garbage.
    An old post I found on AK, from 2013.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
  • MottaMotta Posts: 18
    edited May 15
    mlistens03 wrote: »
    Yikes. Glad you got it fixed the first time, but I don’t see anything that could cause them to fail that is obvious to my untrained eye. I’ll look for a schematic, and if I find one, I will come back and post it here. Just to be 100% sure, how hard are you pushing this thing? If your driving it to hard then that could cause it to fail, although since the driver isn’t dead I don’t think it would be that. Did it perform normally when it was working after the first repair?
    Micah

    I used to use my subwoofer everyday to watch TV & Netflix and play games on Xbox One. Usually, I don not push it hard. My regular volume on Denon 2112CI is -50db for TV & Xbox and -30db for Netflix. For movie watching (no more than one movie per week), I use it at -15db. My DSWPRO 550wi is set to volume 22 (0-40). So, I think my usage is/was pretty light.

    On this second fix attempt we noticed that the resistors that were replaced previously on the power board (R24 and R34) are in pretty good condition. So, they are not a problem at this time. Some additional tests will be performed on the power board today.

    I think that we will need to move our efforts to the amp board. We noticed that the two inductors (L101 and L102) are damaged. These two guys are labeled as 8019P 100L. The capacitor (C101) looked fine. I will look for the specs of these guys named 8019P 100L.

    If someone has the schematics of the power and amp board, please post it here, it would be very helpful.

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • MottaMotta Posts: 18
    mlistens03 wrote: »
    Yikes. Glad you got it fixed the first time, but I don’t see anything that could cause them to fail that is obvious to my untrained eye. I’ll look for a schematic, and if I find one, I will come back and post it here. Just to be 100% sure, how hard are you pushing this thing? If your driving it to hard then that could cause it to fail, although since the driver isn’t dead I don’t think it would be that. Did it perform normally when it was working after the first repair?
    Micah

    Hello mlistens03,

    Thanks for your post.

    I think my usage is/was pretty light. My DSWPRO 550wi is set to volume 22. Its scale goes from 0 to 40. I used it everyday for TV watching (-50 db), Netflix (-30 db) and Xbox One (-50 db) using my Denon 2112CI. I used it for movies (-15 db), no more than once a week. It was working pretty fine after the first repair.

    At this time, we tested the power board and it looked fine. Both resistors (R24 and R34) are in good condition, so I cannot blame them at this time. Additional testing on the power board will be made later today.

    It appears that our problem is on the amp board (not pictured). There are two damaged inductors (L101 and L102). Theses guys are labeled as 8019P 100L. If some one has their specs, it would be helpful. The capacitor on this board (C101) looked fine.

    It would be helpful if someone could provide the schematics for these boards...

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • KennethSwaugerKennethSwauger Moderator Posts: 6,580
    Hello,
    Send an email to: [email protected] and ask about schematics.
    "And the house you live in will never fall down
    If you pity the stranger who stands at your gate" G.Lightfoot
  • MottaMotta Posts: 18
    @KennethSwauger,

    Thank you. Kim sent me the schematics.

    Now, I am waiting for some small parts acquired online.

    Well, we still have problems on the power board. The power board is not able to maintain its power output when connected to the amp board or a capacitor. The integrated circuit (CQ1265RT) will be replaced shortly.

    []'s
    Polk Audio LSiM 703 MM Bookshelf Loudspeakers (Front Left & Right)
    Polk Audio LSiM 704c MM Center Channel Speaker (Center)
    Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
    Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
  • mlistens03mlistens03 Posts: 1,785
    Sorry, i forgot to look for a schematic. Seems like ken got that worked out for you.
    Hope the repair goes well!
    Not Tom, or Trey, or Jim
    Main setup:
    Speakers are one of three, Mission Freedom 770 IV’s, Polk LSi25’s, or Polk SDA-CRS (stock XO, SL2000’s, Blade/Blade model). Electronics are as follows: for the LSi’s and SDA’s, a Technics SU-v75 acting as a phono preamp, into a Yamaha RX-v665, into a Crown XLi800 power amplifier. For the Missions, I have a Lafayette LR-1100. Turntable is a Technics SL-3200, with a Shure M97xE. Cables are generic/soon to be replaced garbage.
    An old post I found on AK, from 2013.
    I've always thought the goal of high end audio was not to have your neighbors bang on the wall and say, 'Turn that darn music down' but to have your neighbors bang on the wall and say, 'Tell your friends to go home and you can practice later this week'.
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