Amp needs new Powersupply?????

[runteldat 10+ year member]

Hey, what does an amp needing a new power supply mean?

Took an amp I just purchased from here to a car audio place, to find out it won't come on. They said it needs a new power supply.

Any help is appreciated.

Is it expensive?

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[05fronty 5,000+ posts]

depends what amp?

 

[runteldat 10+ year member]

Mtx 1501d

 

[05fronty 5,000+ posts]

got pics of board?

 

[runteldat 10+ year member]

No. No camera with me - i'll try to get some.

I looked at it though and didn't see anything burnt.

 

[MakeshiftAudio 10+ year member]

It can be. Read off the numbers and letters on the fets (Little black things) that are toast, and supply a pic of the board.

Like this:

IRF6215

122D

8991

 

[05fronty 5,000+ posts]

No. No camera with me - i'll try to get some.
I looked at it though and didn't see anything burnt.

wish you were closer so i can look at the board and ohm out some components. who tested the amp and how do they know it is the power supply?

 

[runteldat 10+ year member]

Took it to a car audio place, to test it to make sure the amp worked. They couldn't get it to work, so supposedly they opened it up and did something to it......then came back and told me it needs a new power supply????

THey wouldn't allow me to go back in their garage to see what they were doing because of some liability crap i guess.

 

[05fronty 5,000+ posts]

Took it to a car audio place, to test it to make sure the amp worked. They couldn't get it to work, so supposedly they opened it up and did something to it......then came back and told me it needs a new power supply????
THey wouldn't allow me to go back in their garage to see what they were doing because of some liability crap i guess.

any fuses blown on the amp itself? maybe they told you it didn't work so you would buy one from them? i have seen this. anyway see if you can take pics of board when you get the chance.

 

[badvlvo 10+ year member]

The 'liability crap' is just that, crap. For 99.9% of insurance carriers you can go on the shop floor as long as you are with an employee and are not performing work yourself.

And it's an amp, it's not like they couldn't carry it in to you and show you the problem. They just didn't want to show you the problem so you could fix it yourself.

Most audio shops just want to sell you a new amp instead of fixing your existing equipment.

 

[runteldat 10+ year member]

//content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif yeah i figured.

The wife just got home, so i'm going to take the cover off and get a picture of it with her camera.

 

[MakeshiftAudio 10+ year member]

The fets I'm talking about are usually near the large donut looking thing. Might be two, but I suspect that with this power, it would have one.

 

[runteldat 10+ year member]

 

[tinmanchris217 10+ year member]

Surface-mount boards make me happy...

That aside, I can't find much wrong with the board.

- The FET in the center of the board (top of first pic) looks a little toasty.

- There are a couple stray solder blobs, but were probably designed to look that way.

I'd get more opinions on that FET, and take a minute to jiggle the capacitors (black cylinders) to make sure they are all solidly mounted and soldered.

 

[runteldat 10+ year member]

^^^ Hey, one of them were lose. I was getting a piece of paper out of the board and i noticed one of the black things were lose.