I found an old Scosche 2-channel amp I had stashed away in the basement because it didn't work. It kept blowing fuses, and it still does.

I used a multimeter to check for continuity, and my 12+ and GND terminals have continuity (the multimeter beeps when I touch both terminals).

So the amp is apart and I'm at the board. The soldering doesn't look too neat, and there appears to be fingerprints on the backside, though this is the first time I opened it.

Is this something I can fix by cleaning up some soldering points? Or should I not waste my time and scrap it?

 

scrap it

 

Alright here's another.

Found another old 1000watt sony 2/1channel amp in my basement. It turns on, but it goes straight to protect. New fuses, good voltage, etc. Any ideas? Junk too?

 

Scrap it.
Be safe, and buy a new amp.

 

Alrighty.

Thanks for the help guys

 

scrap them and send them to me....

 

Was that a serious remark USN?

Do you know something I don't?

 

Sony and Scosche huh?
Those are really bottom of the barrel.

 

I got them for free a couple years ago

Just don't want to scrap something that's possible to fix, ya know?

 

I want to make a robot and could use those as parts......

 

sex bot?

 

ssssshhhhhhhhhhhhhhhhhhhhhhhhhh don't spill the secrets... oh thanks for the info also. Is spanish required though?

 

hahaha

 

It sounds like a power supply issue on the first amp and an output issue on the second amp. A lot of times both failures will result in heavily damaged components on the circuit board. The power supply is typically right by the power/ground terminals and usually has a large transformer - if the transformer is shorted out the chances of fixing it with the exact replacement part would be slim.

The output is almost always a MOSFET - the transistor looking thing attached to the heat sink. A lot of times when they short out they take some large power resistors with them so there is usually lots of visual damage.

 

Anything can be fixed, it depends on how much you are able to do. I've been in the electronics world for over 30 years. Most things are pretty simple to fix if you can find a schematic, without the schematic, it's easter egging, or very time consuming.

Unless you have the skills to do it yourself, thyen you are at the mercy of someone else. Sell them as scrap on the bay.

 

Alright thanks guys.


KPierson, thank you much for that info. I appreciate it a lot.

New thing with the Sony amp though...

It turns on and the power LED stays green, but it won't play sound. Same problem as you described?