Question about Kenwood KDC-MP228 CD Player

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The word protect comes out on my radio and i dont' have a manual for it

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"protect" displays when there is a wiring fault. Check all connections at the deck to the wiring harness and then check where all the speakers and amp are connected.
"Protect" usually indicates a short or loose ground. So make sure all your connections are snug and not shorting out or coming loose.

Posted on May 27, 2010

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Posted on Jan 02, 2017

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Pretty open question so lets start with the basics....

1.) Check to ensure your amp is coming on.

2.) Ensure your amp is not going into protect mode.

3.) Double check your wiring is correct (RCA's, REM, GROUND, B+, Speakers)

4.) Ensure your settings on the radio and amp (amp gain is turned up) itself is correct.

These are the simple 4 that should point you in the right direction

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I really need ur hlp badley


If the protection light is lit, the amplifier probably has shorted output transistors. To eliminate other possible causes, read through the following page. Let me know if you have any other questions.

Amp in Protect mode - Troubleshooting

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1 Answer

Radio shuts off at volume of 16 or more


Maybe a protection component cutting in.
If you have speakers that are too powerful for the radio it may shut down to protect the amplifier from overdriving the speakers. That produces too much heat in the amp chips/transistors and they either have a overload cut out protection circuit or they burn out.
Even if the speakers are the stock fitted ones the wattage could be bigger than the amp in the radio can handle.
There's probably no way of knowing how powerful the speakers in the truck are but you could try the radio with another set.
Max 50 Watts for that radio. If you don't have the manual for it, it's available here:
http://www.kenwoodusa.com/Support/Car_Entertainment_Owners_Manuals/#_

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