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Screen says protect,how do I fix this problem?

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Sounds like you need a new one.

Posted on Jul 26, 2008

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I purchased a used sony xm-ds1600p5 amp, it turns on, but there's no sound. I opened it and looked around for anything "out of place", and found 3 fried resistors and 3 fried MOSFET...


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be your output drivers- the MOSFETS/IC's fitted for both the channels, Use a meter after disconnecting to check for short in the drivers.Now that you have found the damaged components you can change them.

These items can be pruchased from any electronic spares parts shop.

After the job is done before you power please check the following:

Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise like a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.
You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board, maybe the protect circuit by itself is shutting off due to a faulty bias , maybe a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the protect is off then check for short on the speakers.

Jul 12, 2011 | Car Speakers & Subwoofers

1 Answer

Hi, hope you are having a good time. i have a kenwood car CD player KDC-MP333V. i was listenning to music while i was driving and suddenly the music cut off and an error messeage is appeared on the...


Try pressing the reset switch. It should be a small depression about the size of a pencil tip and will not be marked. If that doesn't work, check your speakers and speaker wires for shorts and/or grounds.

Apr 22, 2011 | Car Speakers & Subwoofers

1 Answer

KD-R416 jvc deck. my deck is showing protect on the screen heellllpppp hahaha


protect mode means that you have a short either in the power supply or in the speaker leads themselves somewhere down the line.

Dec 11, 2010 | Car Speakers & Subwoofers

1 Answer

Its saying safe on the screen


What is saying safe on the screen if it is a car stereo what type??? Most car stereo say safe or protect if you have to many speakers connected or if you have a wire grounding or crossed

Nov 08, 2010 | Car Speakers & Subwoofers

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 Speakers & Subwoofers

2 Answers

How do i get it out of protect mode?


if your in protect mode then it is because of couple things one the ground wire is not properly grounded or two the amp is overheating also if the amp gain is way to high it will throw the amp into protective mode try these see if fixes it

Sep 25, 2010 | Car Speakers & Subwoofers

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 Speakers & Subwoofers

1 Answer

My kenwood kdcmp4380 is in protect how do i fix it


There is a short going on, disconnect your speakers one by one and when the unit comes out of protect mode trace the wires and isolate the short.

Oct 09, 2009 | Kenwood KSC-310CCS Center Channel Speaker...

1 Answer

PROTECT appears on screen, won't function


try changeing the red an yellow wire an check to make sure u got a good ground

Apr 25, 2009 | Car Speakers & Subwoofers

1 Answer

I have an older red sony xplod 500w 4ch amp. the power/protection light is glowing red. what does that mean and how do i fix it? I have no sound.


The protection light comes on if the amp overheats or if the speaker outputs are shorted.

Turn everything off and check all of your speaker wires for shorts. When you locate and repair the short, the protection light should go out and your amp will work normally again.

Hope this helps!

Mar 26, 2009 | Car Speakers & Subwoofers

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