Anyone here an Amp Mechanic? ;)

[joeybutts]

Found a Velodyne SPL-800 Series II subwoofer on craigslist for $35. Only problem is it won't turn on supposedly. It has a Class D digital amplifier.

I'm thinking this is a valid risk given the 1000W RMS amp...... Could always retro the enclosure if it is in good shape, but if I could fix the amp, what a steal....

any thoughts?

 

[Pafi]

I repaired an SPL-800R, but it was a real nightmare to disassemble the power module. I could do it only in a destructive way, 2 days needed for restoring. The reason of the fault was 3 pcs of dry electrolite caps. These amps runs directly from rectified mains voltage, so if you don't have experience in this, don't risk!

 

[joeybutts]

hmmmm.... Thanks Pafi.

I'd be willing to ship in the US48 to fix if anyone is interested.

 

[joeybutts]

Subwoofer is now in my possession. If anyone thinks they can help, it's appreciated.

http://forum.edesignaudio.com/showthread.php/anyone-know-closest-aa-meetingi-73760.html?t=73760

 

[bob91343]

I am in Los Angeles, so if you are local I wouldn't mind taking a look. But if you have to ship it, forget it.

 

[joeybutts]

I don't mind shipping it. It's actually the lightest plate amp I have ever held. If you feel up for it let me know and thanks!

I'm getting ~120V at both boards, and there is ~ -18.63V DC on the outputs which doesn't change with subwoofer volume change.

 

[bob91343]

Do you have a schematic or service manual? I hate working with my eyes shut.

Some of these amplifiers have to be given a signal before they will turn on. Check the manual.

 

[joeybutts]

I don't I did have a signal running to it just in case...

I'll see if I can find a schematic..... Thanks bob!

 

[joeybutts]

Pics of internals. Only one thing my novice eyes see. Two of the solder joints look dark. Other than that I don't "see" anything wrong and have no idea where to start with the dmm.

Also, the aluminum cage can't be removed without desoldering two chips that pass through the holes, which I don't have the equipment for.

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne021.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne023.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne026.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne028.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne029-1.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne032-1.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne033-1.jpg[/IMGDEAD]

[IMGDEAD]https://i210.photobucket.com/albums/bb219/joeybutts/Velodyne035.jpg[/IMGDEAD]