OK tested the power amp pins 5 (+ve) and 3 (-ve) and I have about 21V on the +ve and 0.9V on the -ve.

Showing only about 10mv on AC so that parts good. Just trying to find the test points after the rectifier. I can see a row of 6 diodes and also a row of 2. I have no schematic though.

I thought a bridge would only be made of 4.

Appreciate the help by the way hopefully I can get this baby going again.

Well I just bought stuff to build my bulb limiter then I'll try some fault finding.

I'm not sure how I smoked the diode initially as once pulled apart everything just plugs/screws into place it physically won't fit any other way.

I'm thinking maybe a bit of ESD may have been the cause.

Now when I work on it I have the mains plugged in but switched off at the wall so that whilst I'm touching the frame I am earthed.

Thanks for the replies. I'll make myself a limiting lamp and do some more tests.

The poweramp is a TDA2030

I don't have a cro but I assume I can check for ripple of its bad enough by switching my meter to AC?

Hey guys I'm new here and new to working on amps

I have a line 6 spider III 15watt amp which had a problem where it was extremely quiet even when cranked. I figured I would pull it apart check for anything obvious then put it back together.

Upon putting it back together I managed to release the smoke stored in the electronics. I found a fries diode and replaced it, I also checked the other diodes and all good.

Now I turn it on I get a hum from the speaker, checked and found I had 10V DC there.

I also checked the power amp which had a 13V DC supply and 11V DC output. Input was about 0.8V and volume was all the way down.

I studies electronics a long time ago so I am comfortable with replacing components but would appreciate if you guys can help to guide me through the trouble shooting process