Question about JVC MX-KB30 CD Shelf System

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JVC mx-kb30 Stereo comes on then goes right back off.

When you turn the JVC mx-kb30 Stereo on, it says welcome, aux in (or CD or FM), goodbye, and cuts off, and back to clock display. I have unplugged, but no go. It simply won't stay on for more than a few seconds before shutting off. I'm out of ideas. All the buttons, lights, and displays work, it just won't stay on.

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Re: JVC mx-kb30 Stereo comes on then goes right back off.

I had the same issue on a ka30 - was about to junk it and decided to take a look under the housing.
There was quite a bit of dust on the circuit boards, as well as some cobwebs. I blew all that out and it works like a champ again. Make sure you unplug it before taking the housing off. Hope this helps.

Posted on Jan 20, 2009

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Re: JVC mx-kb30 Stereo comes on then goes right back off.

A desperate longshot but the only i have to offer: It might be a problem with the electricity. if possible try and install it at another location in your house, using other electricity sockets. If the problem is solved by relocating the system, you might be looking at wiring problems (audio equipment can be very sensitive to that), if changing anything in the installation process solved the problem then the problem was probably due to bad grounding and "loose" electricity. Try making the installation as "clean" as possible, avoid tangled wires and stressing a single socket with too many electric appliances. If the problem persists, and you are still under warranty, I suggest contacting your local JVC dealer. If you're out of warranty I suggest locating a professional repair person. Good luck

Posted on Jan 24, 2006

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Jvc home component mx-kb30 protect mode on

First check that the speaker wires are not shorting, if okay! the problem is in the audio output stage of the receiver, the protect mode comes on if a load is detected.

Apr 25, 2012 | JVC MX-KB30 300W Mini Home Audio System...

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My JVC MX-K3 Stereo System Displays "PROTECT" when it's Turned On. What can I Do 2 FIX This?

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.

Apr 18, 2011 | JVC MX-KB30 CD Shelf System

2 Answers

How to diable demo mode on mx-kb30

Turn the stereo on, wait two minutes for the demo to start running then press the "demo/cancel" button located under the "sound mode" selector.

Mar 10, 2009 | JVC MX-KB30 CD Shelf System

1 Answer

Displays "Protect" on screen

the audio amplifier output are fried

Dec 03, 2008 | JVC MX-KB30 CD Shelf System

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Protecked mode?!

when i had this problem my wires were touching the case. other times the wires were touching eachother

Mar 23, 2008 | JVC MX-KB30 CD Shelf System

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JVC Stereo won't open cd tray

Maybe something's jamming it, try fixing the drive, so it comes out.

Mar 16, 2008 | JVC MX-KB30 CD Shelf System

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either the tuner is bas or the antenna is not hooked up.

Jan 07, 2008 | JVC MX-GT90 CD Shelf System

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CDs won't play

Maybe you should fix the cds or clean them or try to fix the disc reader in the radio.

Nov 09, 2007 | JVC MX-KB30 CD Shelf System

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Tray will not open!

press &hold stop then press the eject button.

Nov 04, 2007 | JVC MX-KB30 CD Shelf System

1 Answer


Have it first cleaned by a cd disc cleaner or if you are familiar with cleaning the lens manually im sure that will work...or try inserting an original cd's,if it works with that find the solution to the settings of your device...

Sep 22, 2007 | JVC MX-KB30 CD Shelf System

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