Question about Alpine MRV-T757 Car Audio Amplifier

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AMP IN PROTECT MODE - Alpine MRV-T757 Car Audio Amplifier

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Have you tried removing the power from your amp, there are several reason to put an amp in protection mode, its usually due to incorrect wiring. ohms law???

Posted on Sep 11, 2010

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Posted on Jan 02, 2017

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SOURCE: cant get protect mode off on amp

you burned up a couple of dioeds if if wnt go back to a regular mode

Posted on Apr 02, 2009

bass monster
  • 2 Answers

SOURCE: the amp is in protect mode how do i get it out of

ok one of the most obvious reasons could be that the ground is not properly grounded but there are many reasons like something is hooked up wrong check all your connections before you turn to the internals or it could even be the fuses..

Posted on Sep 07, 2009

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1 Answer

MY soundstream LiL Wonder 4.620 is only going in protection mode


Disconnect all speakers Meter power, remote, ground at amp, if all is good move on, if not check main fuses
Turn amp on; If in protect mode then your amp is toast Turn amp on, if not in protect mode then start reconnecting speakers one by one until your amp goes into protect mode, then you'll know which speaker is bad.

Sep 19, 2011 | Car Audio & Video

1 Answer

Lightning Audio b2.3000.4 is in protect mode. i removed all speaks and conected the amp directly to the battery and it still stays in protect mode. what can i do to fix this problem?


  • Only a select few things can cause protect mode with the battery only connected.
  • An installation issue. Check the Power, Ground and Remote wires. Make sure non are shorting from one terminal to the other.
  • It is still overheated and has not had time to cool down from being in thermal protect mode.
  • The amp itself is touching metal. You always want something non conductive between the amp and where it is mounted, this includes the screws being used to anchor the amp. They should never touch the metal in the car either.
  • The final thing that can cause an amp to go into protect mode while only hooked to the battery is the amp itself is malfunctioning and or defective. You can try opening the amp and look for any black spots on the circuit board where an electrical component might have smoked up or blown and replace that part.

Regards, Tony

May 21, 2011 | Lightning Audio B2.300.4 Car Audio...

2 Answers

How do I reset from the amp protect mode Onkyo receiver TX-SR600?


How do I reset my amp / receiver from protect mode ?

May 07, 2010 | Onkyo TX-SR605 Receiver

1 Answer

Light


The red light indicates that your amplifier is in protect mode. Amps go into this mode if there is something wrong with the setup of the system to prevent fatal damage to the amplifier circuitry. This is bad thing since the amplifier will not function until the problem is solve and it can remove itself from protection mode.

Amplifiers can go into protect mode for many reasons but one of the most common is incorrect mounting. Is your amp sitting on the metal of your vehicle? Is it bolted down and screwed into the metal of the vehicle or your seat? The amp should never be touching any sort of metal. Only the ground should touching the metal of your vehicle.

Speaking of grounds, many people often neglect proper grounding which can cause an amp to go into protect mode. Do you have a solid ground? Is the wire less than 3 feet long and directly connected to a non-painted metal part of your vehicle? Is the ground wire the same gauge as your power wire?

These are just a few reasons why an amp can go into protect mode. You can find more information here. Or simply google for why your amp is in protect mode.

Aug 06, 2009 | MTX Thunder 81000D Car Audio Amplifier

1 Answer

Power light turns from green to red protect mode and then there is no sound coming from my speakers


there are 2 reasons for it to be going into protect mode 1 is heat 2 is the load on it. if it is going into protect mode soon after it starts there is a problem with the speaker. if it is after it has been on for a while it is that the amp itself is overheating. hope this answers your question

Apr 27, 2009 | SPL Audio Phantom DK2-1000 Car Amp

2 Answers

Protect led light


It appears that the amp is going into protect mode. To eliminate external causes, read through the following page. Let me know if you have any other questions.

Amp in Protect Mode - Troubleshooting

Oct 10, 2008 | Car Audio & Video

1 Answer

How to change the Red Protect light to Green Power.


If the amp goes into protect mode, it's likely due to shorted output transistors. To eliminate other possible problems, read through the following page:

Amp in Protect Mode - Troubleshooting

If the problems are not with the wiring, follow the link at the bottom of the page to the Amplifier Repair Primer page.

Let me know if you have any other questions.

Sep 21, 2008 | Audiofonics ADF-240 Car Audio Amplifier

1 Answer

My light on my amp is blinking at a steadty pace.


The amp appears to be in protect mode. The most common reason for an amp to go into or remain in protect mode is 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

Aug 06, 2008 | Alpine MRV-T420 Car Audio Amplifier

3 Answers

Why does my amp stay in protect mode?


The most common reason an amplifier goes into or remains in protect mode is shorted output transistors. To eliminate other possible reasons for it to go into protect, read the following page.

Troubleshooting - Amp in Protect Mode

Aug 03, 2008 | DHD NTX-2139 Car Audio Amplifier

2 Answers

Crunch GP 3000 D Pro


It's very likely that the output transistors have failed in the amp. They will need to be replaced.

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