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My stereo says "protect" when it comes on then it powers down

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The protect messing indicates that a problem was found in the final output stage of the amplifier. To prevent further damage, the system shuts down. The typical problem are the output transistors which can fail. They are usually shorted. Expect a parts cost between $15-$40. Add in the local labor rate for the total repair cost.
Dan

Posted on May 29, 2008

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Water Damage/Power Protect...


Something has happened to it. Might be an IC fault. Seek assistance of any experienced service technician.

Jun 07, 2012 | Sony MHC-GS300AV CD Shelf System

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My sony stereo is on protect mode what do i do


Turn volume down, remove speaker wires from back and power on, if protect stays off there is a short in the speaker wire or speaker. But if the protect comes on, the ouput ic is shorted.

Apr 27, 2012 | Audio Players & Recorders

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My sony fm stereo/fm-am receiver str-de505 reading " protect " but it only activates the auto protect function when i raise the volume.....What do u think?


Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on; or it may turn on but produce no audio to the speakers.

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 'nekkid'. 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.

Sep 21, 2011 | Audio Players & Recorders

1 Answer

My stereo sysytem is a mini stereo: serial number 10200055. It currently says "protect", what is this and how do we return our system to normal operations?


Hi there,

When the word PROTECT appears on this display, this means the unit has detected a critical fault which could potentially cause harm to your stereo system.

The most common cause is a short circuit somewhere - something even as simple as loose speaker wiring could cause a short, triggering the Protect message.

You will need to determine if there is a possible short somewhere, so I recommend you start by firstly turning power OFF, disconnecting all speaker wires, then turn unit back ON.

Operate the stereo (without speakers) and turn volume up:
  • If Protect message appears when turning volume up, then stereo unit itself has an internal fault
  • If no Protect message appears, then suspect the speakers may be causing the issue.
  • Reduce volume and turn unit OFF
Re-connect speakers (ensure the connections are secure), turn unit ON:
  • If turning volume up triggers the Protect message again, there is an issue with the speakers or connections

Hope this helps.....

Sep 04, 2011 | Kenwood Audio Players & Recorders

1 Answer

My JVC car stereo display " Protect " on display


FIRST PRESS THE RESET BUTTON BEHIND THE FACE IF DONT WORK CHECK ALL SPEAKER WIRES SOMETHING MIGHT BE TOUCHING

Jul 24, 2011 | JVC AM FM CD DET FACE CAR STEREO

1 Answer

I have a Denon AVR 1905 stereo receiver. It turns itself off after a couple of seconds. I've already tried "reset."


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.

Jul 07, 2011 | Denon AVR-1905 Receiver

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How to reset my sony mhc-gs100??? it keep saying power protect...


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.

Mar 24, 2011 | Sony MHC-GS100 CD Shelf System

1 Answer

Radio flashes (protect)cant get any stations at all


This is an indicator of an output load problem, turn unit off! remove the speaker wires from the back of the stereo, now turn power on and turn the volume down. If the word protect stays off there is a short in the wire or one of the speakers, but! if the word protect comes on " with the speakers and wires dis-connected " it indicates a short in the audio output ic pack in the stereo.

Feb 23, 2011 | Kenwood Audio Players & Recorders

1 Answer

My stereo won't work. Whenever I try to turn it on, it always turns off saying "protect." How can I fix this?


The protect has come on because it senses an output load problem, Turn the unit off, unhook the speakers and wires from the stereo, now turn the unit on and turn the volume down as far as it will go, this should reset the processor ic, if the word protect stays off you have a short in the wiring or bad speaker. If the protect comes back on with everything unhooked the problem is in the audio output ic pack in the stereo and will require a technician to remedy.

Jan 17, 2011 | JVC MX-KC58 Shelf System

1 Answer

Power Protect still comes on now and again


Amplifier output chip in stereo is defective and unit gives error message of push power protect.
You need to replace output amplifier IC and check supplied voltages.

Feb 28, 2009 | Sony MHC-RXD5 Shelf System

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