how to troubleshoot Sony sa-wx700? - Page 2 - AVS Forum
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post #31 of 60 Old 02-24-2010, 09:11 PM
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When going to the website listed above to search for the part, make sure you change the search drop-down to "Part Number". It defaults to "model number" and will not come up with any results if you search for the part numbers listed above.

I'm hoping replacing those parts will fix it for me too!

-James
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post #32 of 60 Old 03-04-2010, 06:28 PM
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Just wanted to let everyone know that replacing those three components brought my subwoofer back to life - thanks to whoever posted the parts and part numbers! I've attached a pic - looks like they beefed up those two resistors that burned out.

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post #33 of 60 Old 06-23-2010, 06:28 PM
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Hello,

I also have a dead sony subwoofer that emits a high pitch low signal on the circuit board. I have checked all resistors and capacitors especially the referenced R830, R831 and C860. It seems to be OK. I heard a reference of a capacitor on the crossover. What is the capacitor number. Please help. My sub has been down for a long time and I was going to toss it out.
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post #34 of 60 Old 07-26-2010, 10:00 PM
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Oh man! I should have checked here before giving my sub for repair ($133.00): the c860 was blown according to the part they gave me upon picking up the SA-WX700. Thanks for the info. Next time something similar happens I know what to look for. Thanks again to you all.

LIVING-in-the-DIGITAL-ERA.
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post #35 of 60 Old 10-10-2010, 12:50 PM
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My IC 801 burnt up - burnt the leads right off! I am hoping it just overheated from heavy use - I tend to blast some movies and NHRA fuel races on ESPN. Hopefully nothing else went causing too much current to get to the IC 801. Sorry about the blurry pic.
LL
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post #36 of 60 Old 01-04-2011, 05:30 PM
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Hello,I have a three year old Sony SA-W700 subwoofer with a blown 3 amp 125v fuse. I tried to replace it with a 3 amp 250v fuse but it blows as soon as the power switch is pushed on. I have checked the PCB as best I know and do not see any evidence of a blown resistor or capacitor. Does anyone have any suggestions on what might have caused the fuse to blow? The speaker is 3 years old and has worked great up until it stopped. I use a Yamaha RXV-659 receiver to push this speaker.
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post #37 of 60 Old 01-05-2011, 04:27 AM
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To do a serious repair, you need the service manual, a volt/ohm meter, a soldering iron, and moderate skill.

You have a blown amp that is causing the fuse to repeatedly blow. You need to repair it. The first place to look is the main power capacitor. Your visual inspection was the correct place to start. Bulging capacitors indicate close-to-failure or failure; however, they can fail without bulging.

Read the entries in this thread carefully. In my opinion, the entries are excellent.

It is not economically viable to have a <$300 subwoofer repaired because local repair shops typically charge $200+ and only guarantee their repairs for 30-90 days.
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post #38 of 60 Old 01-05-2011, 06:44 PM
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I pretty much expected that reply but the reality sure hurts. This was a really good speaker that shook the walls. I'll continue to search for the fault with hopes that I'll learn more about the works behind the great sound. Thanks
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post #39 of 60 Old 01-08-2011, 03:26 PM
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Any suggestions on how and where to get the service manual or at least the PCB wire diagram for this speaker?
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post #40 of 60 Old 01-09-2011, 04:44 AM
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You can do a Google search. You may need to download the service manual from a site that charges ($15-$30). If you search and search, you may be able to find one for free.
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post #41 of 60 Old 03-18-2011, 10:27 PM
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Quote:
Originally Posted by dpsyphered View Post

*EDIT* Pics attached! I hope this helps!! Long live our WX700's!! :-D
The reference pic shows the big picture & the detailed pic shows the actual components.


If there is anyone else having the issue I found the exact location and will post some pics in a little while. While I have done component level replacement in the past.. I haven't done it in a while and don't want to mess anything up... Does anyone know of someone in Houston, TX or surrounding areas (I live in Sugar Land) who would be kind enough to replace 2 resistors and a cap without hurting the wallet to bad? Please let me know.

thank you,

Dave

Hopefully nobody takes offense to posting on this older thread. I came across it myself and it was an old thread that helped me. I recently bought a SAWX-700 Sub (same as everyone else on here) from some guy used for $50.00. I jumped on it! He didn't have a reciever or anything to show me that it worked other than when he plugged it in and and turned it on the green light came on. I trusted him.... I know, buyer beware!

Got home and it did not work. Started looking on Google and came across this thread. Saw Dpsyphered's pics and tore mine apart. Mine looked almost identical to his pics. Got the parts orderd from Sony. It looked like only my 830 was burned up but I replaced them all 3. It is now working and the woofer wound up only costing me like sixy bucks or so. I am very happy now. Thanks a ton to all who have posted up. This thread helped me a greatly and I am hoping it can help someone else!!!!

I've never soledered before on a circuit board. I was very nervous and didn't want to screw it up. I saw this video on youtube and said "I can do that". Went and bought some desoldering braid and was able to do it myself!!!

Here is the youtube video link
http://www.youtube.com/watch?v=ieoM_40nRVs&NR=1




Thanks again for all who posted this up and responded with pics and details. "I'm back to annoying my neighbors again"!!!!
HAHAHA!!!!
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post #42 of 60 Old 04-15-2011, 02:53 PM
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I just looked at my wx700 and I have 2 white wires that go from the r830 to another light green board with a big rectangular white r830 anyone know why this one is different?
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post #43 of 60 Old 08-12-2011, 09:51 AM
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My 700 lasted nearly 5 years before the sound ceased. I found this thread, and my sub is working today. C860 had a big black bulge and R831 was clearly fried to where even the trace was slightly damaged, I was still able to solder a good connection luckily.
Thanks for the great info, including where to get those parts and part numbers. That info is all still good, August 2011
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post #44 of 60 Old 10-16-2011, 09:50 PM
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Quote:
Originally Posted by Amfreak77 View Post

I just looked at my wx700 and I have 2 white wires that go from the r830 to another light green board with a big rectangular white r830 anyone know why this one is different?

Amfreak77, I opened up my sub with the same problem as everyone else on here. However, by a thorough visual examination, none of the resistors, caps, or capacitors are damaged. Multimeter coming out next. Also, The R830 described in the previous posts seems to be jumped to a separate light green board and the actual resistor is a white rectangular box instead of the standard resistor type. Does anyone know why this is?
Any info on this alternate design?
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post #45 of 60 Old 12-20-2011, 08:33 AM
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Does anyone know if Radio Shack or some other source can supply the capacitor and resistors? I went to the Sony website and they have the capacitor however it says they no longer carry the resistors. Any help is appreciated.

Thanks, Mike
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post #46 of 60 Old 12-21-2011, 09:06 PM
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A local electronics store had the R830 for 2 cents and the C860 for 16 cents. So 20 cents later I am back in business with some nice, deep bass. I could have cheaper out and only replaced the one resistor that was obviously bad but I figured I'd splurge and do all 3. Thanks to everyone for posting in this thread because you sure saved me a lot of time and money.
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post #47 of 60 Old 03-13-2012, 01:51 PM
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Quote:
Originally Posted by tomf301 View Post

My IC 801 burnt up - burnt the leads right off! I am hoping it just overheated from heavy use - I tend to blast some movies and NHRA fuel races on ESPN. Hopefully nothing else went causing too much current to get to the IC 801. Sorry about the blurry pic.

Mine too! And the other resistors and capacitors mentioned in this thread looks pretty charred as well. I haven't got the instruments to check them so I guess I'll just order a bunch of components and fire up the welding gun. I really like this sub so I'd like to revive it...
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post #48 of 60 Old 04-06-2012, 08:24 PM
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I just noticed today my SA-WX700 subwoover doesn't even power on no green light or sound. Would that mean a blown capacitor/resistor, or something worse?
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post #49 of 60 Old 04-06-2012, 09:02 PM
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Quote:
Originally Posted by dapriett View Post

I just noticed today my SA-WX700 subwoover doesn't even power on no green light or sound. Would that mean a blown capacitor/resistor, or something worse?

Ok, opened it up and just noticed the 125v 6.3a fuse, located next to where the power cord goes to the board, is all black - so I'm guessing it's burnt out.

Did a search and had trouble finding a replacement that matches - does anyone know where I can locate one? Does it have to match exactly?

Thanks!
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post #50 of 60 Old 04-17-2012, 10:27 PM
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sorry for jumping on this thread late. have been searching the internet fo a while and got all excited when i saw this blog. dissappointed tho coz my sub has the two white leads going to a green board. does anyone have a clue wat to do next? is this a modification from sony? where they tryna fix the c860 r830 problem? well looks like theres still another problem. please help
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post #51 of 60 Old 04-24-2012, 02:27 PM
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One of the pictures posted here showed a burned C860 capacitor along with damaged R830 and R831 resistors.

I can tell you that Sony no longer produces the resistors (April 2012) but you can get a similar one (the originals are the same) from radio shack. The radio shack version can handle a bit more volts I think. The radio shack replacements are not identical to the original equipment but will work.

My problem was the C860 Capacitor which is the small red unit near the matching R830 and R831 pair. You could see the damage as it was a little blackened and the rubber housing was partially melted. You can still get this part from Sony and they will ship one to you using snail mail for a bit over $5.00. I opted to purchase a slightly different part that handled uf .068 for $1.19 from a special Hi-FI shop rather than the OEM which was uf.082. It has been working fine now for 2 weeks now.

My problem was the SA-WX700 would power up but absolutely no sound and the light would stay on red when the auto feature was used. I have noticed that the uf .068 that I used seems to keep my unit from switching on an off during use.

I had never completed this type of electrical repair before this. It took me about 45 minutes to set up, take the unit apart, replace the part, and put it all back together.
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post #52 of 60 Old 04-24-2012, 02:29 PM
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MFELO...
I have the two white leads your talking about. What is the problem?
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post #53 of 60 Old 07-17-2012, 01:56 PM
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I have read this thread with great interest, however, my circuit board does not have a C860. Mine has the R831 perpindicular and to the right of R830. Parallel with R830 is D811 that then goes into D810.

On the back, there is an unlabeled Capacitor.

Back
448

Front
448
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post #54 of 60 Old 10-16-2012, 01:35 PM
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Some sad feedback that unfortunately does not help much. I replaced all components that looked damaged but it didn't work anyway. I gave up and bought a new plate amp of a different brand that I was able to fit after some modification to the box. So at least I am still enjoying the speakers. Good luck everybody!
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post #55 of 60 Old 12-16-2012, 11:04 AM
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Mine started doing the same thing recently. Green power light comes on but no sound. I took mine apart and didn't see damage but I know from experience repairing computer motherboards that sometimes they don't show signs of damage. My version of the SA-WX700 has the green board also but I hadn't seen any good photos of it yet so I'll add one. I believe the problem with my sub. started after or soon after a friend cranked up the sound on the receiver really high on Halloween night. If anyone knows where to find the R830 on this board on the small green board, it would save me some time searching Googling the info. from the board didn't bring up anything. Thank you in advance.


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post #56 of 60 Old 12-21-2012, 01:05 PM
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The resistors that usually fail are under the gray wire wrap in this pic.

Alvin
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post #57 of 60 Old 01-09-2013, 04:19 PM
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I've got the standard problem, power on but no sound. It looks like all the resistors are fine. There is some discoloration under R830, but it tests out with a meter at 4.8 ohms. I have no capacitor tester, so can't check C860, although it appears fine to the eye, maybe a shade darker on one side. Should I just replace C860 and hope for the best, all three, or keep looking?
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post #58 of 60 Old 01-19-2013, 06:29 PM
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Here are some new links since the parts are becoming difficult to find.
Capacitor part no. 1-136-164-00

http://www.partstore.com/SearchResults.aspx?q=1-136-164-00&ctf=Parts&sa=1&sp=1&sm=1&x=22&y=9

The sony link is probably outdated but I didn't try to purchase one.

https://www.servicesplus.sel.sony.com/sony-part-number-113616400.aspx#

Resistor 1-212-849-00 I had trouble finding this one so I searched for a suitable replacement.

Replacement resistor from mouser should work. I'll probably use these unless the UK can ship inexpensively.
http://www.mouser.com/Search/ProductDetail.aspx?R=FRM-25JT-52-4R7virtualkey57620000virtualkey603-FRM-25JT-52-4R7

UK site. Have to email first since it is out of the country. I don't know the price of shipping.
http://www.signalsuk.com/signalsuk.nsf/Products/1C9CCE67C75AE64B802578E30041E535?OpenDocument

Canadian site but only ships within Canada
http://futureshop.partsearch.com/Part/Sony/Sony/CRGENERAL/Sony/Sony/121284900/New.aspx
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post #59 of 60 Old 03-29-2014, 05:17 PM
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I got my SA-WX700 in 2003 and it worked wonderfully until a couple of months ago when it went dead. It was suggested that I do a web search. When I did one I got this thread. I followed recommendations that I should replace c860 Sony Part # 113616400 and
r830 Sony Part # 121284900. I was able to find the Sony c860 at Andrews Electronics but r830 they told me Sony part r830 is discontinued. However they suggested I order the generic version of r830 which is what I did. I put the parts in today and my sub is pumping the low notes again. Thanks for the advice.

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post #60 of 60 Old 04-24-2014, 03:06 PM
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Bumping an old post. It looks like my wx finally stopped working, I've gotten ,many years out of this excellent little sub and i would like to get it up and running again. Hopefully someone is subscribed to this thread that can help. I took out the amp and looked for the c860 part that seems to be failing commonly. I noticed it looks cracked! That's definitely a sign it needs to be replaced correct? Also, I'm not sure if it was rubbing on the grey wire sheath but there is what seems to be a burnt hole in it. Definitely a sign its been blown correct?
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