Sundown Audio SA2-3500D PCB Error

[AlbertLeRoux]

Hi All,

I would like to share a PCB error on the Sundown Audio SA-3500D PCB.

The source pin of Q77 is not connected to anything. The result is that there is only one IRF3205 driving the particular transformer. When driven hard, this seems to be a failure point.

I would love to know if others also have discovered it and know if this is also present in other versions of this amp.

 

[Perry Babin]

Do the 3/4 vias next to the source leg go through to the bottom of the board?

 

[AlbertLeRoux]

Hi Perry,

The 4 vias do go to the bottom of the board, but is not connected there either.

 

[Perry Babin]

Fortunately, it's an easy fix.