Question about Sony MHC-MG510AV Shelf System

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MHC-MG510AV...Power Failure... I have seen and read most of the other reviews on here...i wanted to try and fix the problem myself...but i doubt that will mentioned, my system is broken...twice it reacted this way in about two weeks...the screen was jammed and frozen...and nothing worked..I unplugged and plugged back into the wall and both times it rebooted, the final time the power light is on and red...but no screen "demo" appears and nothing works...i'm looking for directions to fix it...or somewhere locally to fix it..or determining whether its worth my time too fix...its been a great stereo but it might be out-dated. Who should i seek advice from locally that wont charge me a "butt-load" to fix the stereo??? Any suggestions comments, continuations...please get back to me...Thanks All!!

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1 Answer

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Your stereo went into protect mode to prevent complete failure of the amplifier inside that radio. Most of the time this happens from playing the stereo real loud for a real long time and it overheats. Most of the time disconnecting the receiver/stereo and letting it cool all the way down or at least 5 minutes and then reconnecting it to the power source will reset the protection mode. You want to make sure you are keeping the radio cool. Don't stack anything on top of it and try keeping a small fan blowing on it to expedite the heat out from the unit. Also turning it down every now and then to let everything cool down a bit will help prevent it from going into protection mode as well.

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1 Answer

My mhc-gx9900 is on speakers b how do i get back on speakers a

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Feb 13, 2011 | Sony MHC-GX9900 Shelf System

1 Answer

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First unplug the unit and press the power button to make sure all the power is out of the unit. Try to take a cotton qtip and clean the lazer lense with alcohol. after wipe it clean with a new cotton qtip to remove the film the alcohol produces. Do not use a lot of alcohol and drip it all inside of the unit though.
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The unit is in protect mode because a problem was deteected in the final output stage of the amplifier. The pop in the speakers is a god indication that there is DC current in the output stage. This is not a good thing. This is a relatively common failure of all receivers and can easily be fixed by any shop that does audio repair. Expect a parts cost in teh $30-$40 range.


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The only thing you can do is get a CD DVD player cleaner with liquid. Found at any store these days, then run it a couple times. If it plays, Problem solved, if not, it must be repaired. They will put a new transport in the unit. Usually runs 100-150 to replace. Weigh the cost to fix vs. the cost to replace and the age of the unit before you get it repaired. Hope this helps

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hello my frien let me tell you that the system wont accept more speakers or diferent loads per ohm if the total load says 16 ohms by channel thats the total can handle so if you ad more speakers the system turns off before it burns or or have a severe damage........saludos

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to restart, press stop, clear and display at the same time.

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