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!
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)
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)
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So I removed the main board of my DSWpro 550wi. Here it is:
After a visual inspection, I found that R24 and R34 are damaged:
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.
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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)
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 704c MM Center Channel Speaker (Center)
Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
Denon AVR-X4200w; Peachtree Audio NovaPre; B&K TX4430; Bryson BPD-1; Mains: Dynaudio Emit 10; Center - Polk cs400i; Heights, Center Surround - Klipsch KHC - 6 In-Ceiling; Surrounds - Monoprice in-ceiling; Sub - HSU VTF-2 MK5; LG UP870 4K BDP; NVidia ShieldTV
;
Master Bedroom
Marantz SR-5007; Parasound HCA-1000A, PSB Imagine B, NHT Super One CI surrounds, Martin Logan Dynamo (original), Squeezebox Touch
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 704c MM Center Channel Speaker (Center)
Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
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.
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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)
Micah
music on vinyl; https://www.discogs.com/user/mlistens03/collection
Technics SL3200 turntable; Shure M97xE cart; Hagerman Audio Labs Bugle 2; NAD C352 integrated; KEF Q150 speakers; Velodyne VA-907 subwoofer; home-built stands, generic cables but will upgrade soon...
desktop; Lenovo G50 running Win10, Yamaha RX-v665 AVR, JBL e30 headphones
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.
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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)
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 704c MM Center Channel Speaker (Center)
Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
Send an email to: [email protected] and ask about schematics.
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 704c MM Center Channel Speaker (Center)
Polk Audio RC60i In-Ceiling Speakers (Rear Left & Right)
Polk Audio DSWPRO 550wi Wireless-ready Powered Subwoofer (Sub)
Hope the repair goes well!
music on vinyl; https://www.discogs.com/user/mlistens03/collection
Technics SL3200 turntable; Shure M97xE cart; Hagerman Audio Labs Bugle 2; NAD C352 integrated; KEF Q150 speakers; Velodyne VA-907 subwoofer; home-built stands, generic cables but will upgrade soon...
desktop; Lenovo G50 running Win10, Yamaha RX-v665 AVR, JBL e30 headphones
I was wondering how is ended up with your subwoofer? As I have the same issue with my DSW Pro 660wi.