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Kenwood kdc-252u keeps flashing protect - Car Audio & Video

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You have a short in your wiring, or your amp is having issues.

Posted on May 16, 2014

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These blinks [flashes] are fault indication (Error Codes). From the number of blinks occur at one time switch ON, you can get an idea about the faulty circuit section inside it. This will make repair easy. These are called blinking codes. Make sure about the exact number of blinking of the standby/power LED, by switching On & OFF the set, for at least two times. Count it carefully. If you wish to get some details, check the site linked here. It has details about blinking codes, and fault locating procedure, to many popular brand TVs and other devices. Viewing it in "Mosaic" or "Magazine" will make surf easy.
http://electronicshelponline.blogspot.com/
Blinking codes details to many popular brand TVs are given. Surf the site with patience. Do a search by type in the brand name of the device to the search box.

Posted on May 16, 2014

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: protect mode

Press reset button (small circular button need something with a point) to the left of the 1 channel

Posted on Feb 28, 2009

smarthome2
  • 1114 Answers

SOURCE: kenwood kdc-438u stuck in protect mode what do i

Disconnect all speaker wires at the receiver and turn it back on. If it does not go into protection, your receiver is ok. Re connect speakers one at a time and test until your receiver goes into protection, then trace the speaker wire to the speaker for cuts or shorts. If you have a multimeter, switch it to ohms and check the speaker for a dead short, you may have a blown speaker. Hope this helps.

Posted on Sep 27, 2009

  • 1 Answer

SOURCE: how can i deactivate the protect that blinks in my

Disconnecting the terminal will take to much time.. In between the skip button ,and the #1 on your stereo there is a little dot. Barely noticable unless you know what your looking for, take a safety pin or a screw( anything with a little tip) and push it in. This will restart your stereo. (Car Must be on)

Posted on Feb 12, 2010

  • 6 Answers

SOURCE: how can i remove protect mode on my kenwood

find the lil hole in front of the face use a paper clip to reset it if it keeps on doing it you got a speaker going bad

Posted on Mar 22, 2010

  • 40 Answers

SOURCE: Kenwood kdc-bt742u flashing protect and no sound

If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage, or a bare wire touching the body of the car

Posted on Mar 25, 2010

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1 Answer

I have a Kenwood KDC-252U stereo and it is stuck in the protect mode. I followed the instructions the best I can. Any help would be wonderful.


any relations with jack frost? protection comes on if you run it too loud but if its on all the time that would mean your internal speaker output is faulty. you have to tip it

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1 Answer

I have a 252 u and it will not reset it just says protect


Disconnect unit from power supply for at least twenty mins , it's most likely you have a short or crossed wire on the power side rather than a speaker wire problem you should have 2 x power one switched ( comes on when you turn the ign key ) and one permanent 12 volt , connect your radio earth to the car chassis to make sure you haven't picked up an aux wire from the loom.

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Have you tried hooking up a test speaker that is not installed in the vehicle to see if the outputs work correctly?

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My oem car stereo will not keep memory, time or any presets once car is turned off?


Kenwood is not OEM make sure the memory wire gets power all the time.

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If you are using auto search, the station you want on 98.3 may not be strong enough in that location. I had the same problem. If I drove to where the signal was strong enough, I could program it. That worked fine until the next time I had to program stations and the routine had to be repeated. Try driving around to find a "hot" signal location.

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Kenwood kdc-mp832u keeps flashing protect and will not clear... what will fix this


hit the reset button on the face of radio with a ball point pen or similar

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2 Answers

Protect code


make sure you have no bare or shorted speaker wires and check your speakers to make sure they are all good. if that all checks out, you probably have a bad output ic.

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Security Code for Protect mode


Turn on the car so the radio is flashing "Protect." Look on the front / removable face of the stereo. On it you will find a small round hole - that's a reset button. Find a small paper clip, unfold the clip and stick it gently into the hole. The "Protect" will stop flashing, and Kenwood will be displayed. Unfortunately all your settings/presets will be gone, but at least the stereo is working again!

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