Question about Sony LBT-W300 Shelf System

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It comes on and goes back off, and is asking me to push power pro

It is asking me to push power protect

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HiFi system goes to standby because protection circuit detects error in amplifier section, you need to take unit to qualified tech for fix.

Posted on Jul 24, 2009

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Protect mode on my sony lbt xb500


When ANY amplified product goes straight to protect mode there are either a wire touching or the copper coil in one or more of the speakers is burnt od over extended its limit

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My sony mhc-s9d goes to 'push system protect;


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as a root cause for intermittent shutdown.

May 18, 2011 | Sony Audio Players & Recorders

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Our receiver (pioneer vsx-405) will not power on. Push the power button once and you get the power stand by light coming on but when you hit the button again the stand by light goes off and nothing comes...


Hello,

Usually a fault like the you ask will indicate a bad transistor in the amplification section. I suspect that the control circuit is sensing a fluctuation in the power supply and going in to protect mode. (assuming that the protect circuit itself is working properly) If a voltage is too high the unit will go in to protect mode to prevent damage to the speakers and the rest of the unit. I would take the unit in to a local repair shop and get a estimate of repair charges. Expect a 60 to 80 dollar repair charge depending on how many parts need to be replaced and what the repair labor rate is in your area.
Good luck...

Jun 14, 2010 | Pioneer VSX-405 Receiver

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Getting out of protect mode I have a Denon 787 receiver. It was working fine for 8 months. All of sudden, my reciever goes into protect mode after playing for about 30 min. Right after it goes into protect...


most of the receivers come with a cooling fan inside see if its working they usually work when you turn the volume up,, if its working that means you are playing it to loud if you lower the volume a little it will play just fine..( if the fan inside is not working thats the reason it goes into protect mode and it means you must have it repaired,, it goes into protect mode to prevent furter damage to the unit or the speakers,,

Dec 18, 2009 | Denon AVR-787

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"Protect" and "Push Power"


i have a sony component push power protect, i have already replace IC but still protect push power

May 02, 2009 | Sony Audio Players & Recorders

1 Answer

Pushed power protect


speaker protection turned on.it can be happend because of bad power amlifire section.can you remoove the powe ramp board with large heatsink.its very easy to repair.and i can help.
nuwan

Jan 09, 2009 | Sony Multi-System Mini Hifi Systems / DVD...

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Type in password get message access denied or incorrect passwork and reboots


I was given an old computer years ago that was password protected I was told to pull the battery out for 10 sec. then reinstall it. It cleared the pass word protection. Note: pull the power cord push the start button to drain any power from the system, ground your self to protect the computer of any static electricity first.














Oct 08, 2008 | Acer Aspire 3680 Notebook

1 Answer

My amp automatically turns over to protect when powered


Disconnect all of the speakers and see if it does the same thing. If it does come on, you will need to check all of your speaker wire as well as the speakers. If it still goes into protect, I'm afraid to say that there is a short in one or more of the output or driver stages of the amp. Unless you know how to trouble shoot solid state printed circuit boards down to the component level, you will need to have the amp look at by a pro. Good Luck

Feb 15, 2008 | Blitz BZA2160 Car Audio Amplifier

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