Legacy LA1020 Cleaning (lol)

[Suicide Bobb 5,000+ posts]

A buddy of mine wanted to see if I could fix his amp for him...I was hoping it would just be an easy fix, but it isn't. Powers on fine, but no output, and it's nothing obvious like broken solder or anything like that. I figure it honestly isn't worth my time to fix it because, let's face it, it's a p.o.s. amp lol

I did decide to clean it just for the hell of it. Make it a little easier for him to sell in case he did want to attempt to sell it. It was TERRIBLE when I got it, and took a few hours to get all the gunk off. The rest is just some big scratches, rashes, etc.

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[Suicide Bobb 5,000+ posts]

 

[Bassin Buick]

BAHAHAHAHHAA!!!!! why did you take pictures of that thing???

 

[Suicide Bobb 5,000+ posts]

BAHAHAHAHHAA!!!!! why did you take pictures of that thing???

Why not? lol //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

I was bored, and I love doing before/after pics. That amp is a whole different amp after I got done cleaning it haha

 

[Bassin Buick]

what do you think is wrong with it beside the fact that its a legacy? may only be a buck or 2 to fix.

 

[Suicide Bobb 5,000+ posts]

what do you think is wrong with it beside the fact that its a legacy? may only be a buck or 2 to fix.

I'm not sure what causes a lack of output to all channels. It would appear that one of the caps is done (it's slightly deformed at the top), but I doubt that would cause all channels to go silent. I'm guessing it's outputs or bad solder outside of the inputs/outputs solder joints that I already checked.

 

[Bassin Buick]

protect light on?

 

[Suicide Bobb 5,000+ posts]

protect light on?

Nope!

 

[Bassin Buick]

weird. driver problems maybe?

 

[Suicide Bobb 5,000+ posts]

weird. driver problems maybe?

Driver?

 

[Bassin Buick]

yeah there is a driver circuit on amplifers that tells the output stage how to act and what to do. Example : LM4702 Audio Power Amplifier Driver

 

[Suicide Bobb 5,000+ posts]

yeah there is a driver circuit on amplifers that tells the output stage how to act and what to do. Example : LM4702 Audio Power Amplifier Driver

AH

That looks like it would be a lot of fun to test if it is/isn't working...lol