Question about Sony STR-DE475 Receiver

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The amplifier stops working suddenly simultaneously with a sound like turning the amp on or off! I have to turn it off and then back on in order to work again?

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Disconnect the speakers first to see if a speaker or wire is shorted if it still does not come one you have a blown amp and unfortunately this is not a user repair unless your an electronic service tech.

Posted on Aug 02, 2009

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Posted on Jan 02, 2017

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Stopped working suddenly. No PF lights, no smell. Power light turns on sometimes. Fan turns on. Wired properly. No power to sub/subs.


check the fuse holder an the power holder on the inside of the amp an just to see check ur ground some time they lossen

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Alpine Mrp-m850 I'll be driving and suddenly my amp will just stop giving output. the light doesn't even twitch when this happens, and everytime it does, I have to take me faceplate of my...


It sounds like your amplifier is over heating. It might be an ohm issue. Try unbridgeing your speakers from the amplifier and run each speaker seperately to the amplifier to equal out the ohms on the amplifier. If your speaker box is bridged take each speaker out and rewire them seperately. If the problem still happens you may need a new amplifier and wire that one in as stated above.

Jun 12, 2011 | Car Audio & Video

1 Answer

My amp stopped workin, when i turn the stereo on, the green light is on, then when the music starts to play it turns red and stops working,


The red light on amplifier relates to power supply while the green light is indication of sound functionality. An amplifier that allows sound to generate should display both red and green lights. Howeever, some amplifiers would display only green as long as the sound is functioning.

Solving the problem

First, a red light still on means the power connections to the amplifier is fucntional least requirng repairs.

Second, the green ligh should turn on once the stereo were tuned up to produce sound. If the stereo is still on only least produce sound on the amplifier, check on the connection wires between stereo to amplifier that may have disconnected due to woofing or dubbing sound generals with unfirm wiring.

Third,

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1 Answer

Amp will play at low volumn but not when turned up


probably.
almost sounds like your speakers are worn out, and when you turn the volume up, they clip n no sound comes out.

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1 Answer

My amp suddenly stopped working last night. As


You have a bad amplifier section and your unit will need to be repaired by a technician. I would disconnect the speakers to prevent possible damage. In some cases components in line with the transistors will be bad in the amplifier also. There is no way to tell without electrically testing the unit in shop. Estimated repair cost would be in the 60 to 80 dollar range depending on the number of parts that are bad and the labor rate in your area.

May 04, 2010 | Harman Kardon SIGNATURE 2.1 Amplifier

1 Answer

Jbl am in protect mode


if it goes in protect mode means ur amp is turn up to high or it is over heating so it protectn it from fryn ur amp try to adjust it down

Jul 12, 2009 | JBL BP1200.1 Car Audio Amplifier

1 Answer

I stop getting power or sound to my sub


Double check your fuses. It sounds like you blew a fuse. Check the fuse for the radio aswell as the inline fuse for you amp. On some amplifiers there is a circuit breaker reset button. Check to see if your amp is equiped for that. I did find this quote for reset out of the owners manual.
Remote Turn-on
Automatically turns amplifier on when connected to the head unit's remote output. The
amplifier will turn on and off with the head unit to save current consumption. This control
also operates the reset circuit for the amplifier's protection. It must be connected with
the head unit in order to reset protection circuits.

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1 Answer

Shuts off when the volume is turned up over 60


the amp is tripping out and by turning the car on and off it is resetting the amp

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1 Answer

Sony xm1652z amp problems


it sounds like you have the high lvl inputs on the amp hooked up instead of the rca's. this will cause the boominess for a few seconds when the amp is on and right when you turn it off

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