Need an amp repaired.

[Total Sign]

Who in town is good at fixing amps?

 

I was told that an output is bad. Anyone in town fix amps good?

[Lustalbert]

waiting for some of the devry people to chime in.

i can do some stuff to older amps or tube amps, but anything with digital on it i stay away from.

[Total Sign]

Kicker KX 700.5

[Browning]

Not to hijack the thread or anything Tommy.

 

Lustalbert-I got a Legacy LA330 400 watt here I got for free. I cant get it hooked up. In order to get it to power up, I have to run a ground to the back(chassis) of the amp. Any ideas? Clean looking amp, guy said it was a year old when fucked up.

[Nitrousbird]

I have a Memphis 1000D amp in need of repair for a fair price. Anyone, anyone.

[Guest wesxprs]

Well looks like there are a few of us who need amps repaired. I have a Pioneer amp that needs an new circuit board. Don't think the problem it has can be fixed. I too was wondering who would be the best to get it fixed properly.

 

Wes

[Lustalbert]

Originally posted by Browning:

Not to hijack the thread or anything Tommy.

 

Lustalbert-I got a Legacy LA330 400 watt here I got for free. I cant get it hooked up. In order to get it to power up, I have to run a ground to the back(chassis) of the amp. Any ideas? Clean looking amp, guy said it was a year old when fucked up.

bad conection on the circuit board, probably as simple as re soldering a circuit trace or replacing a conection. i could take a look at it and see.

 

 

Originally posted by Nitrousbird:

I have a Memphis 1000D amp in need of repair for a fair price. Anyone, anyone.

symptoms, age, last time used, what did it do?

 

If I can get my workbench finished and find the floor in my basement soon, Ill start fixing stuff like this, since it seems there is a demand for it.

[Lustalbert]

Originally posted by Assured Risk:

Kicker KX 700.5

I can throw it on a scope, see how bad it is, and if i can find parts, fix her up.

 

Originally posted by wesxprs:

Well looks like there are a few of us who need amps repaired. I have a Pioneer amp that needs an new circuit board. Don't think the problem it has can be fixed. I too was wondering who would be the best to get it fixed properly.

 

Wes

mhat model, how old? depends on what is wrong on the board. if one transistor smoked and didnt take any of the preamp with it, or burn holes through the board, it could be fixable. if the board does need replaced, you may be better off buying a new amp. some proprioterry (sp) parts are imposible to find, or are so overpriced its not worth it to fix.

[Browning]

what do I look for? I have the back off at the moment, I cant see the backside of the circuit bard. Id have to undue some things inside and take the board out to be able to view it

[Lustalbert]

looking at the backside of the board, there should be some heavy solder traces, they go from the power input lugs to the power regulator and power capacitors. look along these heavy traces for any cracks in the board or the trace. Also, if you have a VOM, check the trace from one end to another, see if there is a bad conection, or just a lose sloder joint that intermitenetly conects when pressure is aplied or it wiggles.

[Browning]

I cant see the backside of the board w/o taking it out, and I dont feel com. doing that lol

[Lustalbert]

i can take a look at it sometime. will you be out friday?

[Browning]

Out for what, a meet? I havent been to any yet redface.gif

[Lustalbert]

yes, a meet.

[Browning]

I got it off and sure enough there is a split in the board leading to the grond. Do I just solder this metal strip back together or?

 

Ill put up a pic tomorrow

[Lustalbert]

clean both sides of the break about equal to the width of the solder trace using a fine wire brush. then solder it with a good rosin core solder.

[Browning]

would it help if maybe I soldered a piece of paper clip or something there as well? Or just solder the gap?

[Lustalbert]

solder acros the gap if it is together. If it is a gap where you could se light through it, you will need to bridge the gap. dont use a paper clip, its not really the right metal for the job. use the copper wire (fine strand) that you use for wiring your car. strip off all the insulation, and use it to help bridge the gap. make sure you get the joint good and hot for a good flow, and when you are done, make sure no solder splatter got anywhere else on the board where it could short something out.

[Browning]

Its not pretty, but I believe it may work. Thanks Andrew

[Lustalbert]

as long as its works, looks are second.

any time man