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post #61 of 71 Old 09-08-2014, 06:16 AM
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I am getting rumbling static

I might as well keep this thread alive. It saved me 5 years ago when I came upon not one, but TWO WX700's for free. Both failed the previous owner, and because of this thread, I was able to fix both of them. Well fast forward 5 years, and now one on them is failing again. This time though, the sub is producing a random amount of popping/static noise. It is not loud, but obvious. It is not affected by adjusting the output level control, so I am guessing it might be somewhere in the actual amp area of the system. I have not checked yet to see if it will still process audio or not, but will try that shortly.

If anyone has had a similar problem and knows of a fix, I would love to hear. I will post pics if I find a fix.
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post #62 of 71 Old 09-08-2014, 09:23 PM
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Mine started doing the same thing. I poked around the amp for a while but ended up replacing it as inspired here: SA-WX700 amp replaced, wired right?
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post #63 of 71 Old 09-11-2014, 07:08 AM
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Brilliant

Quote:
Originally Posted by hiperco View Post
Mine started doing the same thing. I poked around the amp for a while but ended up replacing it as inspired here: SA-WX700 amp replaced, wired right?
Brilliant! I never thought of that. I did not even know you could buy an amp plate.
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post #64 of 71 Old 10-05-2014, 05:37 PM
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Quote:
Originally Posted by JKnPA View Post
<div class="quote-container"><span>Quote:</span>
<div class="quote-block">Originally Posted by <strong>nadrealista</strong> <a href="/forum/post/12319217"><img alt="View Post" class="inlineimg" src="/img/forum/go_quote.gif" style=""></a><br><br><br>
I assume one of the components on the bard might be toast, but nothing that I can visibly see..both fuses were fine...I snapped couple photos of the board but they are on home pc..I will try to load those later tonight when I get back home..</div>
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Maybe someone will see something you missed!<br><br><div class="quote-container"><span>Quote:</span>
<div class="quote-block"><br><br>
Searching the web I noticed that several other people had their die in similar fashion as mine after having them for a year or so...</div>
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Products usually have inherent problems like cheap parts, and are the first to go. Quality is sometimes hard to find!<br><br><br><div class="quote-container"><span>Quote:</span>
<div class="quote-block"><br><br>
Lastly if I can't figure out what is wrong with it..anyone here knows good electronics shop in DC are that will not charge me arm and leg to figure what is wrong with it?</div>
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Good....... always ask for an estimate, then you can decide if its worth the effort to fix it. My 'HT' receiver died twice ( kept cutting out). After two repairs, I decided to buy a good receiver. .... FWIW<br><b>It's a good learning experience</b>.................
This sub was quite powerful for it's original price.As a result, it can't take loads of constant punishment but if used moderately could last longer and maybe not break at all. At $200.00, you can replace it and could easily find this same model or something better . If you are willing to buy a used powered sub, you'd be surprised at what's out there for $200.00
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post #65 of 71 Old 12-27-2014, 06:39 PM
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My WX700 that I purchased in 2006 just went out the other day. There was a strange loud low frequency feedback, and now it won't power on. I haven't opened it up yet to see what the problem could be just yet.
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post #66 of 71 Old 01-01-2015, 08:06 AM
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Quote:
Originally Posted by myriad1973 View Post
My WX700 that I purchased in 2006 just went out the other day. There was a strange loud low frequency feedback, and now it won't power on. I haven't opened it up yet to see what the problem could be just yet.
It is quite possible that the driver froze up (died somehow - it must be replaced) and then the amp died trying to drive the frozen driver.

You can check the driver with a volt/ohm meter. If dead, the volt/ohm values will jump back-and-forth between 0 and infinity. You could also touch a nine volt battery to the plus and minus terminals. If no movement, the driver is frozen.
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post #67 of 71 Old 01-01-2015, 01:04 PM
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Thanks for the input. I'll be looking at it this weekend to see if the fuse is blown and what else might be wrong with it.
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post #68 of 71 Old 01-25-2015, 10:02 AM
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I'm well versed in computers, but not electronics, but as you can tell in the images, it looks like there is a burned out panel, plus the 6.3a fuse is blown. I still have yet to test the drivers to see if they are frozen or not.
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Last edited by myriad1973; 01-25-2015 at 05:06 PM.
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post #69 of 71 Old 01-26-2015, 08:58 AM
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Drivers are probably fine, but check with an ohm meter. The board(s) are obviously not. I'd recommend replacing the whole amp panel (like I did, referenced above).
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post #70 of 71 Old Yesterday, 10:16 PM
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mine just went dead after 11 yr.

I bought this Sony SA-WX700 powered sub from Circuit City back in 2004 for about $400. After 11 years, it died on me tonight. Nothing out of the ordinary; it just started making weird popping/crackling sounds (almost like a 'dusty' AM/FM radio tuner knob would do) which progressively got worse within roughly a 30 second timeframe. Then, it powered off and won't power back on anymore. I did smell a slight burnt electrical smell briefly when it happened. I wasn't pushing it very hard at the time (although there's been some times in the past where I've cranked it hard and it handled beautifully, bringing the house down!). Never had any issues with it until tonight. Kept it clean, adult-owned, smoke-free environment. Probably the same electrical components you guys mentioned earlier in this forum that need replacement (resistors or something - I'm no electrical guru so I don't know). I'm going to check with local electronics repair shops to see if there's any hope in getting it fixed for under $200 but I doubt it. Will probably replace it (anyone have ideas on what would be a comparable high-quality replacement?).
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post #71 of 71 Old Yesterday, 11:20 PM
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Update:
I opened it up and lo and behold, there's a circuit board blown to hell! Horrible burnt lead smell, too. Looks like a repair shop fix is out of the question. Here's some info I can see on the board: Bang & Olusen ICEpower A75 ; ICE250A MK3; 113052400118 SW . I believe the bad board is the actual amp - I could find similiar info at icepower . bang-olufsen . com. The main power board looks fine - just a burnt-out fuse. The R830 and R831 resistors look fine too.

Any chance at simply replacing the burnt-out board and the fuse?
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