Major brown outs and now my Qualia won't turn on - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 18 Old 07-14-2012, 04:16 PM - Thread Starter
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We had some bad storms yesterday and my wife said there were brown outs all afternoon. I just went to turn on my Qualia and its totally dead. I know that Sony stopped support of them.... what can one do?
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post #2 of 18 Old 07-14-2012, 04:35 PM
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Probably burned-out the power supply. That's typically what does switching power supplies in - trying to operate through abnormally low line voltage. Power supply might be repairable, or maybe you can find a replacement.
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post #3 of 18 Old 07-14-2012, 05:59 PM
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Check and make sure that there are no blown fuses. There may be fuses inside the unit in/around the power supply. If you're lucky, it's just a blown fuse. Otherwise, something else probably was damaged.
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post #4 of 18 Old 07-14-2012, 07:57 PM
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Curt does offer repair services on these.
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post #5 of 18 Old 07-15-2012, 05:45 AM
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Not trying to make light of scooter's misfortune with his Qualia, but it does illustrate what can result from abnormal power voltage conditions. IEEE did an extensive study of power related failures a number of years ago, and they found that most power supply failures occurred during under voltage or sag conditions. Contrary to what the skeptics believe, there are good reasons for having power conditioning equipment installed to automatically disconnect under abnormal line voltage conditions.
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post #6 of 18 Old 07-15-2012, 10:08 AM - Thread Starter
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Talked with Curt... hopefully its just the power board. next call is to the insurance company.
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post #7 of 18 Old 07-15-2012, 10:15 AM
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I know many have shipped them to Texas. Hope you still gave the box. Looks like you've been enjoying it. I'm sure it'll get back to normal with a better power supply. If insurance covers it, I'd send to Sony. If not Curt will likely do it cheaper. Hope is good.

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post #8 of 18 Old 07-15-2012, 01:59 PM
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Quote:
Originally Posted by fastl View Post

Not trying to make light of scooter's misfortune with his Qualia, but it does illustrate what can result from abnormal power voltage conditions. IEEE did an extensive study of power related failures a number of years ago, and they found that most power supply failures occurred during under voltage or sag conditions. Contrary to what the skeptics believe, there are good reasons for having power conditioning equipment installed to automatically disconnect under abnormal line voltage conditions.

Quite true. But let's also define what a "good" power conditioner is. Good does not mean automatically Monster or Richard Gray. Yes, both of those are good units but greatly overpriced.

A basic surge protector from Home Depot or a <$500 computer UPS is all you really need for protection. Filters and balanced power systems are the next step up to help reduce line induced noise but they do very little with digital equipment. With an all HDMI signal chain, these devices do nothing for image quality and very, very little to improve audio.
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post #9 of 18 Old 07-15-2012, 04:52 PM
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I didn't use the term "good" power conditioner, but the Furman line voltage stabilizer that I use is what I would call a good conditioner. If the voltage regulator can't compensate for excess utility sag, they open a relay and disconnect from the line until voltage returns to normal.
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post #10 of 18 Old 07-16-2012, 08:12 AM - Thread Starter
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delete
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post #11 of 18 Old 07-16-2012, 04:19 PM
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Is that the same as Gilda's "never mind"?
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post #12 of 18 Old 07-16-2012, 06:42 PM
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Had a similar experience with mine once. Unplugged it, waited overnight, then plugged it back in and it worked. Some time after that the power circuit board failed but it was replaced for free.
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post #13 of 18 Old 08-04-2012, 09:48 PM - Thread Starter
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Just got my projector back. Turns out that Sony has a large local retailer that also does repairs. For a very modest fee, they also got it off the ceiling, brought it in, and then just reinstalled it today. The good news is that it powers up. The bad news is that after a few hours of watching a movie, it has developed a buzz that is driving me up a wall.
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post #14 of 18 Old 08-05-2012, 05:30 AM
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So, what was the prognosis doctor, as a result of the brownout?
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post #15 of 18 Old 08-05-2012, 07:08 AM - Thread Starter
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It blew some parts on the power board. Now what to do about the buzz...
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post #16 of 18 Old 08-05-2012, 04:08 PM
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Could be that something else beyond the power supply was also damaged. Buzz usually implies harmonics of the power line frequency. Difficult to diagnose these things from afar.
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post #17 of 18 Old 08-05-2012, 06:55 PM - Thread Starter
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Yup... back to service it goes.
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post #18 of 18 Old 08-15-2012, 12:31 AM
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I like the Sycom SYC 120/240 T2 for first defense.
Available for very little money if one shops around.

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