Question about Lanzar MXA422 Car Audio Amplifier

1 Answer

Mxa422 protection Hi there my amps protection light just suddenly turned on and i can't get it to turn off. I tried to unplug everything but the power ground and remote and the light will still stay on. if i pull the 2 fuses on the side the Blue led lights will come on but the power and protect lights will stay off as soon as i have one of the 2 fuses pluged in the protection led comes on. any help would be greatly appreciated. Thanks.

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  • Jason Bourque May 24, 2009

    with everything unplugged except the power, ground and remote, the protect light still stays on . ?!?!?!

  • Jason Bourque May 25, 2009

    if i disconnect power line going into remote .... everything stays dead .... no signal going to amp to tell it to turn on ?? and i have same voltage as batterie comming to that wire when key turned on.

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  • Lanzar Master
  • 637 Answers

Outputs are fried. Try disconnecting your speakers and see if it still goes into protection mode. If it does then you A thumbs up would be greatly appreciated if answer is helpful for your question. THANK you and GOD BLESS

Posted on Nov 22, 2014

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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Duncan
  • 218 Answers

SOURCE: my vibe 286 4000 watt lanzar amp wont stay on..

Check your speaker load. It probably should be 4 ohms per channel. Also, if you are bridging then you must double your ohms load. It may be that your old amp could tolerate a lower impedence (ohms load) than the new amp. Do this now so you don't fry your amp. Good luck.

Posted on Mar 05, 2007

  • 631 Answers

SOURCE: Protection Light irritation

If the amplifier goes into protect when there are no speaker wires connected to the amp, the amp is likely defective. The most likely culprit is shorted output transistors. If it's new, return it to the place of purchase for repair/replacement.

Posted on Jan 11, 2008

  • 133 Answers

SOURCE: Lanzar Vibe 1200D protection light

You will need to show it to a service technician as it seems the output section has blown so it remains in protect mode. One reason (could be) that the input to the amp was high and may have been clipping for some time before the amp decided it could take it no more

Posted on Jan 14, 2008

  • 8 Answers

SOURCE: protection mode?

What guage of wire are you using to power the amp? Should be 6 guage or larger. Do you have a good ground to the frame of the car (metal inside trunk area)

Is the amp new or used?

Also your speakers could be shorted inside. Use an ohm meter to check them. They should be about 4 ohms useually. Test them UNHOOKED from the system.

Try different spakers. If you cant solve the problem, the amp might be damaged.

Posted on May 27, 2008

gotthebeats
  • 11 Answers

SOURCE: why is the red light that says protect on? my amp

first thing check all ground and power wires and make sure ur rca wire make sure it isnt cut in anyway. after that unplug ur sub and unplug the negative wire from ur amp, while its out check the fuses on the amp if all is well put all fuses back if not get new. then plug the negative wire back in if protect goes off check for heat and if no heat inspect the wires from speaker out put all the way to the sub, look for any wire touching another this is were most problems are even the smallest wire can trip a protect. if u still cant find the problem. an amplifier specialist is in order.if its trashed go on ebay and buy a powerbass there goin cheap right now. hope i could help

Posted on Oct 12, 2010

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But did you TRY it with everything (speakers) unplugged?

Make it standalone to determine the internal/external determination...

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

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Most likley it is a bad channel. Needs output transistors and a couple of resistors. or it may need a pre-amp voltage ic.

Not a repair for your average do it yourselfer.

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Try this and let me know what you find:

Normal 0 false false false MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} MOST OF THESE SETS HAVE A SELF DIAGNOSTIC:

UNPLUG TV AND THEN PLUG BACK IN---TURN ON---GREEN POWER LIGHT COMES ON FOR A MOMENT AND GOES OFF.

PRESS AND HOLD “device” and “menu” buttons on front of tv for at least 5 seconds and then release both together.


Watch for power light to blink in a sequence:

1 blink-then 2 blinks-------no error

2 blink-then 1 blink-------X-ray protection

2 blink-then 2 blink-------SHORT PROTECTION*******

2 blink-then 3 blink---------deflection circuit problem

2 blink-then 4 blink---------vertical circuit problem


******2, then 2 is most common---usually means one of the fuses that protect the Convergence IC or IC’s is blown---set will detect no voltage to convergence IC and shut down.


SET WILL REPEAT BLINK ERROR CODE UP TO 5 TIMES AND THEN TO GET IT TO REPEAT MORE YOU HAVE TO UNPLUG SET AND TRY TO TURN ON AGAIN.


IF IT IS 2 AND THEN 2---USUALLY
CONVERGENCE CIRCUIT PROBLEM

If it is 2,2 I have START TO FINISH STEP BY STEP INSTRUCTIONS AND PHOTOS TO SHOW YOU WHERE THE FUSES & PROTECT RESISTORS FOR THEM ARE LOCATED.

The instructions tell you everything you will need for the repair and how to do it.

You can buy all the parts needed for less than 30 dollars on Ebay (I know the best seller there) I have repaired hundreds of these sets with this problem

If this information has helped you rate this solution as I do this here for free.

If you want the instructions & photos let me know and I will post them here for free.

SD TECH

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My amp protection will not turn off i tryed almost everything?


i wish i can chat to you live so i can ask you qestions about your amp but to figure out what section of the amp might be fried it could be the power supply section could be the out put section or the in put section but i would try process of elimulation try unplugging your rca jacks and your subs unhook to your amp just the power hook up and try powering it but if the protection light steel comes on then try to remeber the last time your amp was working good and playing your subs was your amp getting hot if so you probaly fried your out put chips and not telling what else next question was you just hooking your amp up in your car and acually touch one of the power wire to the ground on your amp this happen to my friend and fried the power circuit relay chip on the power supply thats all the advice i can give but usually when the protection light comes on and you got every thing hook up right something fried

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Same thing happened to me so I returned it for repair turns out it was an internal 25amp fuse on the output. Got it back an it sounded very weak now it does not play at all. Nothing wrong with my setup as I have now got an 800watt amp that is running great.

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Hello shwoop22,

It sounds like power is shorting out or the amp is defective. With the fuse removed, use a multimeter set to ohms and check between the power terminal to ground.

The protection light will normally come on if the amp overheats (for example when running with too low impedance), or if the speakers are shorted.

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Disconnect all speaker connections and rca cables. Leave power, ground and remote wires intact. Try turning on again. If you still have a protection light your amp is faulty. Hopefully you have warranty. Vibe is mediocre. Time to invest in an old school Lanzar Opti Drive amp. .A thumbs up would be greatly appreciated if this answer is helpful to you. protection-light-grief-shonxoarcym4awy4zl1imx4o-2-0.jpg

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"Protect" and "Push Power"


Doiuble check your wiresa again for no pinches or shorts, even at the back of the unit. Also try unplugging the unit for 12 to 24 hours. If that does not help, it may be the time to buy a new stereo because that means there is a fault in the output device, unless you kinow someone who can trouble shoot and repair solid state electronics.

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