Question about Legacy LA838 Car Audio Amplifier

2 Answers

Smoking everytime i hook up either my power and ground or vise versa i get smoke from inside the amp, its not blowing fuses. i just had it apart to sauder a wire back because it wasnt working before and when i took it apart the wire fell out so i put it back in and now it just smokes? what might cause this.

Posted by on

2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I never hooked the ground to the power and power to ground i know what im doing. what i meant was that when i hooked either one up it would start smoking. i have already fixed it a few times before. i just wanted another opinion on what was happening, the amp was working fine and then it just quit and i took it apart to check the terminals and a wire was off so i put it back on. i may not be an installer but i have been hooking up stereos for the past 5 years i may not know everything but i know my stuff. so i wont be hurting myself.

Posted on Jul 25, 2008

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that gotĀ 5 achievements.

    Governor:

    An expert whose answer gotĀ voted for 20 times.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 109 Answers

Gee I would think that it is kind of obvious; your amp is blown. Just because it doesn't blow fuses doesn't mean much. If you hook the power up to the ground input and the ground to the power and then turn it on you pretty much toasted the amplifier. If you don't know why the amp is smoking, but you're trying to fix it yourself, you are basically telling me that you have no business doing so. I have been an installer for 15 years and even I am not dumb enough to try to fix a bad amplifier. Do everyone a REALLY big favor; stop messing around with something that you don't understand of have knowledge about before you hurt yourself.

Posted on Jul 17, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

2006 Mitsubishi Lancer, gauge fuse keeps blowing. Have replaced the fuse twice, first time it was fine for a week but now it blows after a few minutes of driving...anysuggestionso


I would normally say to replace with a higher amp fuse, from a 15 to a 20. But it's possible you have a short somewhere in your system, grounding a power wire. A higher amp fuse could cause that grounded wire to overheat and burn making smoke. First thing to do is to check the ground wire(white)where connected to the firewall under dash and make sure they are clean and tight, for a good connection. The power may be backfeeding and causing the fuse to pop because of a week ground.

Dec 01, 2014 | 2006 Mitsubishi Lancer

1 Answer

We hooked up the cb radio and the meter light lit up.... my buddy tiltted the radio back and it started to smoke, i took the cap off and the smoke was comming from under the echo board, we fixed one...


If there was a direct short to ground.....which it sounds like there was....it would've blown the protecton diode. The protectio diode is located near the power plug on the inside of the radio (component side). It will be black with a white stripe at one end, It looks like a little can/cylinder with wires coming out of each end. Kinda like a resistor.....but smooth.
The problem lies HERE.....
If it did burn the diode, it will not look like that, It will be a crispy little black thing that falls apart when you touch it.
Just look around near the power plug for a burnt component. If you see one...well...thats probably it.
FYI: the diode will be directly between the pos and neg leads in the circuit near the plug.
Also...CHECK THE FUSE!!!!

One more thing. If the radio started smoking when you tilted it....that means that there is something metal rolling around in there loose. Thats the only reason it should've shorted like that.
Good luck!!

Feb 16, 2011 | Magnum Radio Communications

1 Answer

A2300HCT Car Audio Amplifier: i have a audiobahn a 2300 hct amp and it has stopp...


Well, sounds like you have an internal damage since it smokes, if it smokes as soon as it kicks on, and blowing the fuse right away, I would have it fixed. But my guess would be something with the ground that is making this happen, or some how your power is grounding on the amp. When ever smoke comes into play, thats never good any way at this point you gotta admitt that thiers internal damage.. blowing fuses can also be cause by over working your amp. along with the sub load at 1 ohm make sure your amp can do the same.. hope this was helpful in some way

May 16, 2010 | AudioBahn A2300HCT Car Audio Amplifier

1 Answer

One of my wires came out and it touched the amp and started smoking and now when u hook it up it blows the fuse i need some one too fix it r how can i fix it


well first make sure your not pluging the power in the the ground and if that not the issue just toss it ....not worth getting fixed you could probably get a 1000 watt amp for the price to repair

Mar 29, 2010 | Rockford Fosgate 100a2 Car Audio Amplifier

2 Answers

Marshall MG100HDFX Amplifier Head does not turn on


If you connected both speaker outputs of the two heads together you likely destroyed the output transistors of one or both heads. assuming they are solid state. It is unlikely a tube amp would have much damage.

The sequence would be that when you started driving the second unit, the feedback paths within it would fight the attempt to drive backwards and the output transistors would first overheat and then short, This would put a shoirt on the power supply and blow the fuse. The damage would be permanent and would LIKELY NOT include the transformer.

Expect the power transistors, driver transistors, associated resistors to go up in smoke. The unit will have to go to a shop to repair. Probably $30 of parts wholesale, but labor is going to cost you for sure. Expensive mistake.
Refurbing this has to be done carefully to insure all bad parts are replaced as a single bad one left in can blow the whole lot again.

The new Speakon connections avoid some of these mistakes... but not all.

Operate ALL you equipment from a single point source of power to avoid ground loop and faults from causing "common mode" destruction of circuitry.

Mar 18, 2010 | Marshall MG100HDFX 100-Watt Amplifier Head

2 Answers

Amp blows fuses


Are you using the correct fuse? if so,
more then likely, you don't have a good ground. Try grounding to something else that has more direct connection to your frame. If that doesnt work, try getting larger power cables.
I had the same problem with my 2500w xplodes all I had to do was get a thicker cable for the ground and battery connection. What was happening, was it was needing more power then the wire and fuse could handle, so it would blow the fuse, since the higher you have it, the more power it needs to feed the watts.
I would try grounding it directly to the frame on a good part of the frame before spending another $70 on new power cables though.

Mar 09, 2010 | Car Audio & Video

1 Answer

Keep Blowing Fuses


Sounds like the amp is shorting somehow. You are obviously shorting out somewhere between the battery and the amp. Are you sure you grounding location is a good one? is the fuse blowing only when you turn the stereo on? Something is not hooked up correctly.

If the fuse at the battery is blowing then it's a short.

If the fuse on the amp is blowing then its probably a bad amp.

Jun 12, 2008 | Kenwood KAC-728S Car Audio Amplifier

2 Answers

Beer Spilled on my Power Acoustik PS2-820 Amp


Hi , now that you have the amp apart , just check the underside of the printed circuit board and check for any corrosion ,rub it with a soft brush . then try connecting without speakers . see if it still blows fuse, if it does then there is a likelihood that your mosfets / outputs may have shorted the first time you reconnected it . Good luck

Mar 21, 2007 | Power Acoustik PS2-820 Car Audio Amplifier

2 Answers

Blowing fuses under hood but nothing looks smoked in the amp


Sounds like the amp is fried, most likley in one or both of the output sections. Good luck.

Feb 21, 2007 | PPI DCX-1500.1 Car Audio Amplifier

2 Answers

Smoking Amp/Fuse Blowing


Sounds like you may have a shorted switching Transistor in the switch mode power supply causing a short to ground. If you are technical enough. Remove power remove cover and do a continuity test on the transistors on the heatsink. non of them should read zero resistance between the three legs. in all connection configuration you use to hook up your meter. If one or Two or even all of them do you must replace with proper part.

Aug 02, 2006 | Legacy LA838 Car Audio Amplifier

Not finding what you are looking for?
Legacy LA838 Car Audio Amplifier Logo

162 people viewed this question

Ask a Question

Usually answered in minutes!

Top Legacy Car Audio & Video Experts

Tygh Duval
Tygh Duval

Level 2 Expert

290 Answers

isaac johny
isaac johny

Level 3 Expert

796 Answers

xxxxxx xxx

Level 3 Expert

4807 Answers

Are you a Legacy Car Audio and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...