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Stereo Unit tries to turn on...but then just turns right back off.

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Your sereo is going into "protect" mode to save your speakers because the output stage of your amplifier is shorted. Time for a technician...sorry.

barneyluc

Posted on Oct 03, 2008

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No volume on all left side speakers


Determining the Cause of the Problem Let's assume our system has a head unit, a crossover, a two channel amplifier and two door speakers with only the right speaker working (the left speaker is not working). If the door speakers are behind the door panels then we want to make sure the speaker is the problem before removing the panel. We'll work backwards starting with the amplifier and ending at the head unit. Testing for a Speaker Problem With the vehicle and the stereo turned off disconnect the speaker wires for both the left and right speakers at the amplifier. Now connect the left speaker to the right amplifier output (which we know works). Turn on the stereo system and make sure the balance is set to the middle position.If the speaker still doesn't work then the problem is somewhere between the amplifier and the speaker Testing for an Amplifier Problem Now we'll need to see if the amplifier channel is bad. Put the left speaker back on the left amplifier channel and the right speaker on the right amplifier channel. This returns the speaker wiring to its original configuration. Again, with the vehicle and stereo off unplug the RCA cables from the amplifier's input and switch them so the left cable is in the right input and vice versa. Turn on the stereo system. Testing for an RCA Cable Problem For any intermediate components between the amplifier and the head unit follow these steps for each one. We only have a crossover so we'll just do this once. Begin by testing the RCA cables between the intermediate component and the amplifier. Unplug both RCA cables from the intermediate component's output. Now plug the working channel's RCA cable into the non-working side of the crossover. In our case the working channel is the right so plug the right RCA cable from the amplifier into the left side of the crossover. Turn on the stereo system.
If the right channel continues to work then you know the problem is in the RCA cables between the amp and the crossover. esting for a Crossover or Equalizer Problem At the input of the intermediate component (in our case the crossover) flip the RCA cables around (left to right input and vice versa). Turn on the stereo system.
If the right channel continues to work and the left channel continues to not work then you know the problem is in the intermediate component. Replace or repair this component.
If the problem is now in the right speaker and the left speaker works then the problem lies before the crossover. Turn off the stereo system and return the RCA cables to their normal places.
Testing for a Head Unit or RCA Cable Problem Pull out the head unit from the dash so you can access the RCA cables. Unplug both RCA cables from the head unit. Do not disconnect any other wiring. Plug the right RCA cable into the left channel of the head unit. Turn on the stereo system.

Sep 29, 2016 | Cars & Trucks

1 Answer

Harman hk570i ultrawideband linear phase stereo receiver turns on but doesnt make sound


Unit turns on but do you hear the speaker relays turn on ? unit might be in protection - if relays are switching on try using unit just on stereo

Jun 24, 2014 | Audio Players & Recorders

1 Answer

Stereo turns on shuts off after few seconds


This is a bad power supply. You have to do some serious work at the component level of the unit to fix it.

Jan 22, 2014 | Sharp Electronics - Xldk257n - Xl-Dk257n...

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

My stereo won't work. Whenever I try to turn it on, it always turns off saying "protect." How can I fix this?


The protect has come on because it senses an output load problem, Turn the unit off, unhook the speakers and wires from the stereo, now turn the unit on and turn the volume down as far as it will go, this should reset the processor ic, if the word protect stays off you have a short in the wiring or bad speaker. If the protect comes back on with everything unhooked the problem is in the audio output ic pack in the stereo and will require a technician to remedy.

Jan 17, 2011 | JVC MX-KC58 Shelf System

1 Answer

Sony CDX GT200 does not work... is there a fuse in this radio? I cannot turn on the unit now. I just got my car back from the repair shop and they replaced my battery and alternator, but now my radio...


There is a fuse in the back of the stereo unit. Also trace the red wire from the stereo to where it's connected, and check the fuse for the circuit that the stereo is connected to.

May 22, 2010 | Sony XPLOD CDX-GT200 CD Player

1 Answer

My jbl stereo wont turn on. when i turn my truck on it just lights up and then goes straight back off


Hi there Willieulin.
I wonder if the speakerwires are shorting the amp in the JBL stereo!
One or more speakers could be blown......
The protection circuit is most likely doing its job, protecting your stereosystem from damage.
If you have a extra amp connected to the stereo, check if it is wired right.
Try to turn the ignition key "only" so the lights on the stereo turn on. If you turn it further so you start the engine it most likely turns the stereo off.
If that happens the powerwires to the stereo are wrongly connected.
Luck with the problem.
Iceman.

Nov 04, 2009 | JBL SF25 Main / Stereo Speaker

2 Answers

Avh-p5700 pioneer


My first suggestion is to not purchase "used" electronics from eBay. I bought the same kind of unit from eBay... and mine is broken too. I got a cell phone, car stereo, and a remote.. they were all not working properly when I received them.

Did you try the restart button. It is a small, pin size button on the right-side of the unit near the 4-way select buttons. My player wouldn't eject a cd either, and when I pushed the restart button with a pin, the cd ejected and the unit was ok for playing cds... that's about it

May 04, 2008 | Pioneer AVH-P5700DVD Car DVD Player

2 Answers

My car stereo


Check the fuses

Oct 06, 2007 | Car Audio & Video

2 Answers

Connecting remote cable to other port from the car stereo


You can tap the amplifier's remote wire into the accessory power lead at the back of the head unit. On most head units this is a red wire. Doing this will make your amplifier turn on and off with the key switch, rather than the deck power.

Jul 01, 2007 | Sherwood XCM-6870R CD Changer

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