I wanted to chime in and post to this topic and say thanks to all for the valuable info. I have two of these SAWX700's since 2005 and both blew out. Now there's a bit of a back story here as to my setup. I owned these for 7 years with no problems at all, until I changed my power configuration. Originally I hated the auto turn-on feature, like others I hated the poor sensitivity of the circuit. I found the subs would shut off during quiet periods during a movie and turn back on in the middle of an explosion. So to remedy this, I ran them to my power conditioner, which is a PureAV PF60. Now the PF60 has configurable switched outputs, so I set it up so when my AV receiver turned on/off so would my subs. I simply left the power on my subs and everything was great.
However, when I moved to a new house, I was unable to set it up this way and after only a couple months (or less) one of the two stopped working. Usual symptoms, power up, but no audio. At that point I did some reading and found this forum and complaints about the auto turn-on circuit blowing out. In an attempt to stop it from happening to sub number two I manually turned it on/off, but alas from time to time I'd forget to turn it off and it would remain on for weeks on end. It did last a long time, probably another year until we moved into our new house before it to conked out.
But when we built our new house, I custom wired the basement for my theater and made it so I could power the wall outlets at my sub locations and again switch my subs with my power conditioner. Since I both my subs were dead I was banking on repairing them with advice on this forum.
Fortunately, the info provided here was spot on. I ordered parts from Mouser and eBay based on the specs provided as I couldn't find a decent dealer/price for Sony brand parts. I was able to get 10 sets of Caps and Resistors shipped to my door for less that $20.
I replaced both resistors and the cap in both subs and it corrected the problems and the work great once again! Took about 30min/sub including disassembly/reassembly, totally awesome and actually a fun project for a geek like me.
I'd like to mention that I found it a little curious that the capacitor that blew was in direct contact with the foam wrapped wiring that runs across it. And in my case (and most it seems) the foam was burned. Now I would argue that its the capacitors contact with the foam hindered its heat dissipation and caused it to burn out and when it did, took the resistors with it. As such, I decided to ziptie the cables away from the capacitor and maybe prevent it from happening again. Unfortunately I didn't take any pics, but anyone else could easily figure it out.
Anyway, I'd like to say thanks again and now since I have 8 more sets of these parts if anyone should want any to do this repair, send me a PM and I'll drop some in the mail for you.