I'm hoping replacing those parts will fix it for me too!
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.
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.
*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.
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
Thanks again for all who posted this up and responded with pics and details. "I'm back to annoying my neighbors again"!!!!
Thanks for the great info, including where to get those parts and part numbers. That info is all still good, August 2011
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?
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...
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?
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.
Capacitor part no. 1-136-164-00
The sony link is probably outdated but I didn't try to purchase one.
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.
UK site. Have to email first since it is out of the country. I don't know the price of shipping.
Canadian site but only ships within Canada
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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