Yes, I do take repairs from all over the US and I have a few clients outside North America as well. I have a tremendous amount of backlog right now though and have been actively turning down new work and clients for a while. If you would like to pm, I'll give you details on how to get on my wait li...

I forgot to reply with books I've found useful. Pretty much anything by the author Randy Sloan or Douglas Self. I have multiple books by both authors. Both authors write on the theory, principles and design of poweramps and preamps. Neither one will go into much detail about power supply design, an...

The guide perry sells is not the same as the free website. The guide he sells goes step by step through every piece of information you need to fix nearly any amplifier. The bcae website is more of a primer on car audio in general. The guide is the equivalent of going to trade school to learn how to...

You are missing the point. Switching power supplies in automotive amplifiers are basically the same across virtually every make model and power, only the scale changes. The basics that you are missing, are things like how to recognize what parts of the amplifier do which jobs, how to properly ident...

I just went back and looked at your pictures more closely and I noticed that 3 of the channels have diodes fitted in place of outputs. Are these the mosfets you replaced, or did you replace the power supply mosfets that we told you were going to need replaced? If you didn't replace the power supply...

That's a question I do not have time to fully answer, but in short, once you make repairs power the amp with a current limited supply. For this amp it should power up with as little as 2a available. Monitor current while it powers up. I personally monitor current any time an amp is powered on my be...

That's a question I do not have time to fully answer, but in short, once you make repairs power the amp with a current limited supply. For this amp it should power up with as little as 2a available. Monitor current while it powers up. I personally monitor current any time an amp is powered on my be...

They are actually 30R1 (30.1Ω) 1% tolerance. The color bands are orange - black - brown - gold - brown. Few color bands shift a lot from heat soak and age. You sometimes have to pull them and look at the bottom, or look for one doing the same job in another part of the circuit. 9 times out of 10, i...

in previous post I was wrong :roll: with the 3 band. The 3th band is the multiplier number the color code is orange / black / brown orange = 3 black = 0 multiplier brown = 1 gold = 5% tolerance so this is a resistor of 30 Ohm 5% resistor the 5th band is brown, I don't know what this means, maybe ot...

did you measure the gate resistors? Did you happen to see the color code I last posted and no I have not yet as I have been busy with other projects and work, but I will get to it. Thank you. So I de-soldered one side of the amp and measured the gate resistor and got 30.4 ohms according to the read...

Silverhorse wrote:did you measure the gate resistors?

Did you happen to see the color code I last posted and no I have not yet as I have been busy with other projects and work, but I will get to it. Thank you.

FDP55NO6 is a good replacement I think. The color code of the resistors is difficult to see (I'm not so good with colors) I think it's orange / black / brown / gold than it is a 300 Ω 5% resistor. Cut one leg of one resistor and than you can measure the resistor value with your multi meter. It shou...

FDP55NO6 is a good replacement I think. The color code of the resistors is difficult to see (I'm not so good with colors) I think it's orange / black / brown / gold than it is a 300 Ω 5% resistor. Cut one leg of one resistor and than you can measure the resistor value with your multi meter. It shou...

Basic multi meter is ok, Fluke is good quality. P55N06 works normally with 33 Ohm resistors. Don't know if you will find new P55N06's. If not you can replace them with IRFZ48 resistors, but then you have to use 330 Ohm resitors. 5% is OK. part numbers: - IRFZ48VPBF - PPC330BCT-ND but before you ord...

these are good videos I think that give more insight. https://www.youtube.com/watch?v=z-9wCw7J6QQ https://www.youtube.com/watch?v=R0Uy4EL4xWs If there are burnt marks you can be 100% sure that the component is broken. The best and most logical way is to start there. Start wit replacing all the P55n...

Is there someone out there that can give me some direction based on the information I provided in this post on where to start? I have been chasing my tail on this. My background is limited with the electronics testing part of this. This amp has a no power condition. I have checked all components, b...

Is there someone out there that can give me some direction based on the information I provided in this post on where to start? I have been chasing my tail on this. My background is limited with the electronics testing part of this. This amp has a no power condition. I have checked all components, bu...

Silverhorse wrote:you have 4 big black rail caps, what voltage do you measure there between the + and - of every single cap when the amp is powered up?

I measured 12 volts between all caps.

you can start with changing the 4 transistors with the 4 resistors that are connected to it. Each channel has 4 of these. You can start with only the 4 of the side who has burning marks and see what happens then. There is a (good) possibility that after this repair attempt its not working and you h...

I think that the minimum damage is a blown power supply. Do you have good soldering skills to repair this? I am not too bad, but what would it take to fix the blown power supply? Which one is it? Is it one of the ones that are coils? There are two of them. Thank you for your help. Why would you thi...

Silverhorse wrote:Can you measure the resistor with your multi meter?

I measured it and the reading I got was "0.04". Is that within spec?

Main Board 2.jpg can you take a more detailed photo of this resistor? It think it's burnt. I noticed that too and tested it and tested fine with 12V running through it. It looks like it was an issue with something else that I am trying to track down from the no power issue. I feel it is something e...

Silverhorse wrote:an overview of the board would be a good start.

Here you go. I hope these are a good start. Thank you.

Silverhorse wrote:do you have pics of the inside of the amp?

What are you looking for in particular? I can take any pictures that you need if there is a specific thing you want to see. Thank you for your reply.

I am new to this forum, but I was wondering if anyone can help me on an XS4600 4 Channel Amp that has no power. The light does not turn on at all. I have checked the voltage on the amp and there is 12 volts from the terminals inside the amp and the IC's have there voltage checked and all show 12V or...