Question about JVC MX-KB30 CD Shelf System

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Displays "Protect" on screen

Speakers do not work. Tried other speaker still did not work. Tried new wires still did not work. Disconnect speakers and went back to normal connected speaker but still no sound.

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  • lebluc May 17, 2009

    protect on screen cant use my suystem

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  • JVC Master
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The audio amplifier output are fried

Posted on Mar 04, 2009

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1 Answer

I have Kenwood kdc- mp343 it displays protect then what happens?


Disconnect all speakers from unit. Turn on. If still in protect then unit is damaged and needs repair. If not then reconnect 1 speaker at a time until it goes into protect. That speaker is either shorted or wiring is shorted.

Oct 30, 2016 | Kenwood Car Audio & Video

1 Answer

Protect comes on why


Hello
Protection display will come over this type of set, when it is overloaded or system confused condition. Just unplug the device from AC mains socket and replug it after 4 to 5 minutes, and see whether it shows any protect display. If it shows it again, just disconnect the output loads, ie, connected speakers, and check. Again it displays 'protect', the internal circuit, especially the output amplifier circuits has the trouble, and the system need service. if it does not show protect display, after disconnecting the speakers from it, check the speakers or its connecting wires for damage. OK.

Jan 20, 2012 | Sharp Audio Players & Recorders

1 Answer

When i start the home cinema i get normal on screen hello and after hello get i on the screen "protect"


check your speaker wiring for any signs of shorting...the receiver will go to protect if there is an abnormality in the speaker wiring or the speakers themselves....one easy way to check this is to disconnect all the speakers and then turn on the unit..if the problem still happens with all the speakers disconnected....then there is a problem inside the amplifier on the receiver and you'll need to take it to a shop, but if the problem stops occurring when you disconnect all the speakers, then you will need to check the wiring to each speaker and possibly the speakers themselves

Jun 11, 2011 | Audio Players & Recorders

1 Answer

I have used the amp for a while running 4 speakers. the front are components, and 6x9 in the back. The amp worked great and was loud. The amp just stopped working one day when i turned it on. Turns on...


One of your speakers might have burned out, shorting the wires that connect it to the amp. Disconnect one speaker at a time from the amp, turn it on(try all four, turning the amp on and off each time you disconnect a speakers wires) and you can pinpoint which speaker might be causing the amp to go into protect mode. If you disconnect all the speakers and the amp still goes in protect mode, then the amp is shorted internally and will need to be replaced or repaired.

Sep 22, 2010 | Clarion APA450 Car Audio Amplifier

1 Answer

My stereo says" protect" everytime i turn it on. can't get anything else.


Hello grammagrisbo, hi your Kenwood head units will show "protect" when there's a problem with the speaker outputs so check to see if the impedance load meets your radio, 8ohms or 4 ohms?. having parallel two speakers on a single channel may cause this dilemma. This might also mean a shorted speaker wire, a blown speaker, or an internal defect in the head unit. Once the condition that's causing the "protect" mode is fixed, the CD player should be back to normal, the next time you turn it on.
If it's staying in "protect", then you'll definitely have to remove the stereo and do something to fix it. Many car audio stores will do system troubleshooting, for a fee. If you want to do it yourself, here's what you need to do:

Pull the Kenwood unit from the dash and disconnect all the speaker wires. power it on and see if the "protect" message displays. If it does, the stereo has an internal defect and will need to be serviced. If it doesn't, then turn it off, and re-connect one speaker only. Turn it on again and see if it will displays "protect" message.

If the radio works with one speaker connected, connect the other speaker to the second channel, you may have now the idea where the problem begun, you will identify the speaker that's causing the problem. There may be a wiring problem or defective speaker in that channel.

If it displays "protect" with a single speaker connected, then disconnect that one and try the other one. If all the speakers cause a "protect" mode, then you're probably back to a defective head unit.

Aug 31, 2010 | Kenwood Car Audio & Video

1 Answer

My kenwood kdc-x493 is saying protect can you help me fix it


sounds like a shorted speaker wire somewhere...behind the radio disconnect one speaker at a time until the radio no longer displays that message... if you disconnect all the speakers and the radio still displays the message.. it may require service

Aug 24, 2010 | Kenwood KDC-X493 Car CD/ MP3 Player

1 Answer

Power comes on and then Power Off displays on screen. Is there a reset or replaceable fuse? Has it gone into protection? I've looked under the hood and saw no visable problems.


Try this route first.

The most common problem found on FixYa for Audio Video2_bing.gif Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire2_bing.gif. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers2_bing.gif) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Jul 05, 2010 | Pioneer VSX-33TX Receiver

1 Answer

Sony STR-D665 receiver display flashes "PROTECT"


The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Jun 07, 2010 | Sony STR-D665 Receiver

1 Answer

MY KENWOOD CAR CD PLAYER IS SAYING PROTECT??


Hi,

Kenwood head units show "protect" when there's a problem with the speaker outputs. This might mean a shorted speaker wire, a blown speaker, or an internal defect in the head unit. Once the condition that's causing the "protect" mode is fixed, the CD player should be back in normal mode the next time you turn it on.

If it's staying in "protect", then you'll definitely have to remove the stereo and do some troubleshooting to fix it. Many car audio stores will do system troubleshooting, for a fee. If you want to do it yourself, here's what you need to do:

Pull the Kenwood unit from the dash and disconnect all the speaker wires. Turn it on and see if the "protect" message displays. If it does, the stereo has an internal defect and will need to be serviced. If it doesn't, then turn it off, and re-connect one speaker. Turn it on again and see if it displays "protect".

If it works with a single speaker connected, keep re-connecting the others until you identify the speaker that's causing the problem. There may be a wiring problem or defective speaker in that location.

If it displays "protect" with a single speaker connected, then disconnect that one and try a different one. If all the speakers cause a "protect" mode, then you're probably back to a defective head unit, unless your friend managed to blow all your speakers at once.

Thanks,

Dec 09, 2009 | Kenwood KDC-319 CD Player

1 Answer

It says protect on the front screen


An amplifier goes into protect when it detects a load with too low an impedance. If it displays protect with no speakers connected at all, the amplifier is damaged. If not, reconnect speakers one at a time (while the amp is off!) to determine the cause of the fault.

It may be as simple as a single strand of copper wire shorting between the positive and negative terminals of a connection.

:)

Nov 29, 2008 | Onkyo GX-D90 Main / Stereo Speaker

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