Question about JVC KD-G720 CD Player

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Faulty speakers or deck

When i use my rear speakers (clarion) my deck(jvc kdg 720) stops outputing sound and i have to shut it off and unplug the speakers to make it work is it the deck or the speakers this is the second set of speakers that i had.

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Re: faulty speakers or deck

The speakers are probably grounding out somehow, check the connections or for rust, my door speakers were rusty and grounded out, i just wrapped some electrical tape around the parts that touched the doors and i havent had any problems since, good luck, i went 6 months befoe i figured it out, i hope tis helps

Posted on Oct 02, 2008

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I have a jvc kdg431 radio/disc player. recently the speakers stopped working intermittently. They have now stopped alltogether. Ihave looked at the fuse on the back of the unit & that is ok .

I have had this problem before. The first thing you have to do is fade the deck all the way to the rear. Now turn the deck off and than back on see if you have sound now? IF not fade the deck all the way to the front and turn the deck off and than back on see if you have sound now? What you are doing is checking for a bad speaker because if you have a grounded speaker it will shut off the decks internal amp. You can do this though out the left and right as well to find if is a that. Now if nothing you do helps you might have to replace the deck. IF you want to get carried away you can check the OHM,s on each speaker and check each speaker to a ground with an OHM meter and if you have any speaker that shows a speaker lead that shows a ground start chasing that wire and see if it has a screw through it. Go all the way to the speaker. You will probably find a bad speaker that has shut off you system ?

Jan 01, 2015 | JVC Car Audio Receivers

1 Answer

Why dosent my speakers sound on my clarion vz709

You may have bad speakers, a short in a speaker or speaker wires. You may also have a bad output ic inside of the deck itself.

Dec 28, 2014 | Car Audio Receivers

1 Answer

I have no sound coming from my rear speakers on my pioneer deh-6300hb

The first thing you will need to do is test all of your speakers and speaker wires for any shorts or grounds. Just one shorted speaker or speaker wire will shut off the audio. If your speakers and speaker wires check out fine, you probably have a bad internal output ic inside of your deck.

Feb 28, 2012 | Pioneer Car Audio Receivers

1 Answer

I have a jvc kd-lh300 that would come on but no sound. i try hooking the wires to individual speakers still nothing, i checked all the fuses nd still what do u guys think?

It sounds like you may have a bad internal output ic. If you know how to access the menu, some decks now have the option to turn off the internal output ic. I'm not familiar with that particular deck, so I couldn't tell you for sure.

Jul 25, 2011 | JVC Sirius KD-LH300 CD Player

1 Answer

Why does my radio say amp grd when there is no amp hooked up and it was playing just fine tell now

sounds like you need to check your speakers and/speaker wires to make sure you don't have a short to ground or bad speaker. if those check out, you may have a bad output ic inside of the deck.

May 30, 2010 | Clarion DXZ438R CD Player

1 Answer

How to turn on my internal amp in my jvc kdg-720 car srereo

The amp is always active when the radio is on.

Dec 05, 2009 | JVC KD-G720 CD Player

1 Answer

Clarion DRB2475 mutes when I turn up the volume

Sound like one of your car speakers is faulty, try using the fader and see if it still happens when all sound is to the front or rear and try left and right.

Nov 16, 2009 | Clarion DRB2475

2 Answers

My clarion cd player in my boat was working fine now it says amp grd. I have looked but i see nothing unhooked what can i do to get sound out of my speakers?

Remove all the speaker wires.

Power the radio back on and verify it is not the radio at fault.

If it powers up, check the speakers with a Digital Multimeter set to OHMS 20x.

Each speaker should have a resistance of 4 ohms. (or 8 in some cases)

Any variance (+/- .5ohms) means the voicecoil is blown, and replace that speaker.

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No sound.

Disconnect speakers one by one and reset the unit each time. If the speaker is blown, or the wires are frayed, it will shut down the internal amp. Also check the fuse in the back of the radio first, it should be near the wire harness. Power cycle the unit as well, unplug it from the power source, plug it back in. Hope this helps.

Aug 16, 2007 | Clarion M475 CD Player

1 Answer


This is often caused by a shorted speaker wire. If you have a pinched or loose speaker wire that's touching metal, it will cause the deck's internal amplifier to shut off. If you have a multimeter available, disconnect the deck then check each speaker wire for continuity with the chassis ground wire. If you don't have a meter, you can disconnect all the speakers, then connect them again one at a time. See if you can tell if there's one speaker that kills the deck's output.

Jul 28, 2007 | Pioneer DEH-P9300 CD Player

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