Question about JVC MX-KB4 CD Shelf System

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My stereo wont turn on

My jvc mx-kb4 stereo wont turn on, it used to say protected and then it will shut down automatically, but now it wont even turn on. (i do plug it in,,i tried all the plugs in the house and in my neighbors too) is there a way i can fix it myself... help,,

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  • tesla45 Apr 14, 2009

    I have JVC MX-KB4 stereo won't turn on, it say's protected and it shuts down. I removed the power and plugged it on, Still the same. Can somone give any clue? Thanks.

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  • 4234 Answers

SOURCE: protect problem

I'm not really familiar with your specific model, so I don't know what the output stage looks like. I'd guess that this unit has a large black 'amp-pac" for the amplifier section. This should be attached to a heat sink in the rear of the unit. Look to see what the markings are on that part. I expect to see STKxxx. Can you post that here?

Thanks,
Dan

Posted on Sep 08, 2008

  • 40 Answers

SOURCE: My JVC mx-gc5 stereo says protect and then shuts off

If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage (like squashed or rodent damage).

Posted on Mar 25, 2010

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1 Answer

JVC MX-GT88 sound system showing protected them shut off why


Chances are that something is blown in the power output stages and units shuts down to protect against further damage.

Repair or replace, which ever is cheaper!

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My jvcMXGT90 keeps shutting off the audio keeps shutting off when ever the jvc is cranked past 15 and the bass is on levle four what should udo??


Turn it down or it will turn itself down permanently.

http://www.retrevo.com/support/JVC-MX-GT90J-manual/id/314ci360/t/2/

Read the paragraph labeled "CONNECTION" on Page 2 of the SP-MXG70 (last) part of the document.

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.

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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

My stereo turns on and then says protect and turns off.I have disconnected the speakers and still happening..How can I fix this?


The protect feature is intended to guard against a more severe problem inside the system. This can happen due to a variety of reasons, like a bad power relay. If the protect didn't kick in, there could be a nasty side effect like smoking, catching fire, or causing electric shock.

Unfortunately there isn't much you can do to fix this. Taking the system in for repair will likely end up costing much more than if you bought a used and working version of the same model. I'll bet anything the unit has something imprinted on the back like "No user serviceable parts inside." This means that even if there was a fuse inside, it's not recommended for the user to try changing it.

My recommendation is to put this off to the side and buy a replacement. You could try selling it on eBay or Craigslist for parts. The speakers probably still work just fine.

Nov 07, 2010 | JVC MX-KB4 CD Shelf System

2 Answers

My JVC mx-gc5 stereo says protect and then shuts off


If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage (like squashed or rodent damage).

Dec 12, 2009 | JVC MX-GC5 CD Shelf System

2 Answers

Protected


You got to open this puppy up and replace the 2 bad IC boards.  Known problem with this brand stereo.  Defect in the IC boards causes your fuses to blow and they will keep blowing every time you try to put new ones in.  Cost for parts will be about $200.

Aug 15, 2009 | JVC MX-GT88 CD Shelf System

1 Answer

Stereo goes into protect mode


Protect is a safety feature so that you do not blow your speakers. However with it hooked up with the computer you may have surpassed the max output. If it still does this with out going through the computer, it has been damaged.

Mar 14, 2009 | JVC MX-KC45 Shelf System

2 Answers

Protect problem


I'm not really familiar with your specific model, so I don't know what the output stage looks like. I'd guess that this unit has a large black 'amp-pac" for the amplifier section. This should be attached to a heat sink in the rear of the unit. Look to see what the markings are on that part. I expect to see STKxxx. Can you post that here?

Thanks,
Dan

Sep 08, 2008 | JVC MX-GC5 CD Shelf System

1 Answer

System automatically shuts itself off after a few seconds.


I have no Idea, I have My JVC system sitting in a closet. I got it in 2004, and It was working fine, and all of a sudden it stopped and went into protect mode. I have no idea what to do about it.

But this is what I did.

I unplugged it and I let it sit for 24 hours to see if it would Reset the microprocessor, that did nuttin'. So I took it apart ^_^ That was fun! and I checked all the wires for loose connections, and I made sure te cables were in there tight. My unit is a pretty old though, I have a surround sound system, but usually a good blast of canned air may clean the circuit board and the components.

Cheers!

Mar 03, 2008 | JVC MX-KA3 CD Shelf System

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