Question about Sharp CD-C2900 Shelf System

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Protect I have a radio who when i'm turn on PROTECT appears on , what is the cause of thee probleme and how can i do to resolve it ?? Please help me and sorry for my english??

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  • Anonymous Oct 26, 2008

    mi aparato de audio en cuanto lo conecto te pone protect en la pantalla y no me permite aser nada incluso se protege sin estar las bocinas conectadas



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It means that there is something connected to the unit that shouldnt be. Have you added speakers or made the speaker connection longer by adding speaker wire ?? THis will cause the unt to go into protect mode as well as the unit too loud. If all else fails, call the manufacturer for a service location.

Posted on Dec 18, 2007


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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

Protect message comes on and my radio doesnt work.what should i do?

Hi there,

Firstly, are you able to remove the head unit from your dash?

Usually, when PROTECT appears, the unit has detected a short circuit (or overload) somewhere, and has shut down to prevent damage.

Problems in the wiring (e.g. loom or speaker wire) can often cause this condition.

I recommend you have someone remove the head and:

- check the fuse in the back of the head unit.
- disconnect one speaker wire, then turn unit on to see if Protect message comes up.
- do this with all speaker wires, until the unit operates without going into Protect mode.

If the above does not solve the problem, then you may need to decide whether repair is viable, or to replace.

Jul 12, 2011 | Kenwood KDC-MP142 Car CD/ MP3 Player

2 Answers

My kenwood double din radio was playing and then protect came up on the screen

Hello, i´ve a auto radio Kenwood kdc-bt6544u, i´m more than happy with him. The other day morning i put the plate in the radio and it appears the word protect in the display, I´ve checked the speakers, remade the speakers connections and still appear the message. Can you please help me, what should i do? I shall now wait for your kindly feedback. Best regards Ricardo Fonseca

Jan 27, 2011 | Kenwood KDC-BT742U

1 Answer

I turned on my radio and Protect is flashing on the screen. Nothing that I do makes this go away. Please help.

you have a crossed wire problem that will need to be fixed before the protect will drop off and allow you to use the stereo.

Sep 30, 2010 | Car Audio & Video

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

2 Answers


Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty . Send to Rockford Fosgate for repair .A thumbs up would be greatly appreciated if this answer is helpful to you. protect-zb4bomd1rt4qms0dqd12kkt2-3-0.jpg

Jan 29, 2010 | Rockford Fosgate Power 1001BD Car Audio...

1 Answer

My 450 watt fusion amp is now in ''protect mode''. how can i fix this?

Start by completely turning off the power to it and anything connected to it. Turn all levels down to there lowest volume settings. Check to be sure your speakers are not shorted. Be sure the power voltage is correct. Turn on each of the items, the amp being last. That probably will resolve the problem but I am not that familiar with the unit just trying to help. Most units have stay in protect mode until I cycle the power. Typically they monitor the speaker current hence a short would cause almost an instant protect fault.
Good Luck,

Dec 01, 2009 | Car Audio & Video

1 Answer

Flashing PROTECT

This is often caused by a problem with the speakers or speaker wiring. A speaker wire that's pinched behind the head unit will cause this problem if it's shorted to dash metal or the deck chassis. The first thing to do is remove the head unit and inspect all the speaker wiring for bare spots or pinched spots. If everything looks okay, disconnect all four speakers from the deck and switch it on. If it still shows "protect" then you have a defective head unit. If not, then turn it off, re-connect one of the speakers, and turn it on again. Continue until you find the speaker output that puts the deck into protect mode.

Jun 25, 2007 | Kenwood KDC-MP4032 CD Player

2 Answers

My stereo is flashing the work "PROTECT" across the front

In a Kenwood deck, "PROTECT" usually means that one of the speaker output wires is shorted. The first thing to do is pull the deck and inspect the wiring at the back, making sure there aren't any pinched or exposed wires. If a speaker wire is pinched against the deck chassis, or bare wire is touching dash metal, it can cause your problem. If you don't see anything obvious, disconnect all speaker wires from the deck, then turn it on. If it still flashes "protect", then you have a defect in the unit. If not, then re-connect the speakers one at a time until you find the one that causes it to go into Protect mode. Usually if you don't find a pinched or shorted wire behind the radio, the problem can be found at the speaker itself. This is especially common if you've installed after-market speakers; if a speaker terminal connection has come loose and is now touching the speaker basket or mounting surface, it will shut down the deck.

Jun 07, 2007 | Kenwood KDC-MP5032 CD Player

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