Sony SAWX700, powers on fine, subs are not blown but no sound
The subs are ok, this model is known for this issue, its the board (amp) repair shops wont fix it down to the component level, they just want to replace the board. any idea how much that would cost? should I just buy another sub... I must say I'm dissapointed with Sony as of late... I think I'll stick with Yamaha and Polk from here on out :)
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Re: Sony SAWX700, powers on fine, subs are not blown but...
The problem may be with the preamp power supply section. Easy fix in most cases. This is a great sub, they don't build them this well anymore. From Sony, I was quoted around $200 plus the bad board in exchange. The part to fix it costs $1.00, labour an hour or less. Get it fixed. The other brands have gone cheap with components and build quality. Let me know if you want more info.
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it sounds like it could be a blown channel in the amp. if the sub was blown it would still work just sound horrible. i have blown many subs and amps. you can bring it to an audio shop near you and they can fix it. i just got one of my channels fixed for 35$
That model is known to have issues with the amps.Your problem is caused by a couple of components on the board shorting out.If you pull the amp out you will find on the large board behind the speaker terminal a couple of burned components.
The easiest fix is to buy a Bash 300w amp from Parts Express and replace the original amp.The Bash amp fits pretty well except that it is about an inch shorter.You can fill the hole with some mdf and have a sub that actually performs better than the original and with less heat build up as it is digital.Hope this helps,it's not complicated really.
Some basic trouble shooting is required here. First you need to see if it is a problem from your source or the sub. Try a different source to the sub-woofer and see if it changes the response. If still nothing on the sub, then most likely there is an issue with the amp or driver. Check to see if there is a fuse on the sub, if so, it could be blown. There could also be an issue with the auto switching circuit on the subs amp, in that case, it would need to be repaired in the shop. But before that I would check all of the connections to the sub, and also to the driver in the cabinet. If everything looks good, then put some type of source directly to the woofer to see if it works, if you get sound, then looks like the amp has a problem. Again a repair or replace issue.
solidus- Your amp is going into protection mode, try disconnecting the sub and see if the power will stay on then.If yhe power stays on,it is your sub-blown or shorted ect. But if it does the same as before,its to the repair shop. cooltek Mar,4/08
there are fast checkings for you:
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is the system working fine exept the sub?
my guess: the headphone jack works fine then the speakears are too
if soo then the sub amp is bad
or some connection is torn
try opening the sub and see if everything is hooked right
and if soo then the amp is the problem
every electronics shop can fix this