Question about Kenwood KDC-MP235 CD Player

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Radio shuts down when volume is turned past half way. bad ground?

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  • Kenwood Master
  • 2,226 Answers

It could be several things, it could be a bad ground, a bad power connection, a bad speaker(s) or the deck itself could be bad, i would check all your connections first. if they all check good try disconnecting one speaker at a time.

Posted on Sep 13, 2010

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  • Bill Sep 14, 2010

    I am fairly sure it is not the unit itself. It was working perfect prior to buying a new vehicle.

    The radio i had in my car now before putting this one in had no issues with shutting off.

    All wires were done correctly, but im thinking i may have connected a bad ground.

    All the speakers are good, newer pioneer speakers.

    So with that information would you assume it is either a bad ground connection, or a bad power connection?

  • kenw392
    kenw392 Sep 14, 2010

    that is a good possibility, if you have a multimeter you may want to check your voltages. a bad voltage regulator will cause that problem too. especially if the voltage is low or fluctuates a lot.

  • Bill Sep 19, 2010

    I have now noticed that it is doing it even under moderate volumes, any time i drop my RPM's on my motor.

    Could this be something like my alternator?

    I would imagine even if it was grounded good or not. the fact that it is shutting off when my RPM's dump, it is something with the alternator.

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Can't turn one unit off when I turn the volume allthe way down I get no click and the unit stays on


Unfortunately, your volume potentiometer (the part behind your volume knob, which connects to the component board, has gone bad. This can happen from turning the knob too far past full volume or even sometimes when turning it off. The part to repair this has never been offered as a replacement part. Your only solution is to remove the battery to turn the unit off.

Best regards.

Dec 07, 2012 | Motorola Talkabout FR60 (14 Channels)...

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My amp keeps TURNING off and on.


If it just started, you have an equipment or wiring problem. Check the wires first, that's easy. Otherwise, the amp may be bad, check the warranty if its new. Maybe you can get a replacement.

If it's always happened, some cars have an factory amp for the rear factory speakers hidden in the wiring. Sometimes between body panels. If you didn't bypass that, you're more than likely blowing out the new amp with too much power causing it to shut itself down. (protected mode or keep blowing fuses) Could be a blown speaker, bad ground, internal damage, RCA cable problem, the list goes on and on. Find out the preoutput voltage of your headunit and set the gain to what that is and nothing else LEAVE IT THERE, the gain isnt a volume knob for your amp its to get the amp and the radio on the same page (i.e. radios at 50% volume and so is the amp) if you turn it down too low that will make the amp very sensitive to volume adjustments and your amp will be at 100% while the raidos at like 50 or 75% and once you go past the 50 or 75 on the radio the amps going to keep trying to play higher even though its already maxing out which is going to cause it to clip and cause distortion untill it goes into protect mode. Hope this was helpfull to some one

on May 12, 2010 | Car Audio & Video

1 Answer

HELLO: KENWOOD MARINE STEREO WHEN TURNING UP THE VOLUME ABOUT HALF WAY THE RADIO CUTTS OUT TILL YOU TURN IT BACK DOWN THEN IT COMES BACK ON.


You have a grounded out speaker wire or blown speaker. Disconnect speaker wires at the unit. Make sure the wires are not touching, turn the unit on, then turn the volume back up. If it stays on, it is a wire or speaker. Re-connect one speaker at a time and test. once you find the bad wire/speaker, disconnect the wire at the speaker and test again. This will determine if it's the speaker or wire.

If after disconnecting the speaker wires it still cuts out, check your ground and meter the DC voltage at the power wire. If you do not have enough current at the radio, it will shut off as well. Usually this will happen at about 9.8v dc.

If you still need further help, post a reply/comment and I can help you dig further.

Jul 11, 2011 | Kenwood Car Audio & Video

1 Answer

My alpine keeps shutting down when the volume is turned up past 20. Plus I have no sound coming out of my subs. I tried switching rca cables. And I sent my amp off thinking it was my amp. Their is a little...


so it turns off suddenly and then the next second it turns back on and starts playing

from that and personal expericance i belive that the radio system (radio and amp) is not reciving enough power

is this radio inside a car
if so what car

what i would do is attach bigger thicker wires to the positive and negative of the amplifier
direct from battery

positive of battery>>>> positive of amp
metal grounding point on car>>>>>> negative of amp
(do not use negative of battery use the metal of the car)

May 12, 2010 | Car Audio & Video

1 Answer

Radio on VW Jetta shorts out


This is most likely a bad ground from the radio to the chasis. The louder you play it the more current it draws and the lower the voltage drops thru the resistive (bad) ground. When volatge drops below a certain point the radio shuts off.

May 29, 2009 | 1998 Volkswagen Jetta

2 Answers

Lose power when volume is over 20


The speaker wires might be crossed.

Dec 27, 2008 | Car Audio & Video

1 Answer

Reads dc/dc error @ high volume


more than likely you have a bad ground and/or a power supply problem: bad wire connection, bad alternator - but check the radio's ground wire first.

Oct 15, 2008 | Pioneer DEH-P80MP CD Player

1 Answer

When volume is turned up the radio shuts off


Have you checked all of the connections on the speakers, stereo, etc. Being a marine CD player, the wires and connectors are exposed to more elements than a car CD unit. Check for corrosion and make sure that all the speakers are hooked up to the correct "+" and "-" terminals. Not sure if this will help, but thought I'd try. It does sound like a speaker connection problem.

Aug 30, 2008 | Clarion M255 AM/FM Marine CD Player

1 Answer

My indash jensen radio keeps shutting down when turned up?


Sounds like there's a power problem. First take out the radio and leave it connected. Turn on the radio normal volume, then disconnect the radio's antenna. If the radio shuts off then you need a better ground. If the radio doesn't shut off then you need to run power wires to the fuse box.
The only other thing is you have a bad speaker that only shorts out when you turn it up. Disconnect all but one speaker or one speaker at a time and see which one is the problem.

Jul 08, 2008 | Jensen Car Audio & Video

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