Hi, lex.
First af all, I am very thankful to you for this thread.
I have also a problem with my S750 set.
One day my S750 did not give the power at all. The main fuse was blown out. But I found also that on both amp.boards C40 were burned out totally - see picture.
Other components seems OK.

So because it was not clear why it happened, I decided to replace all components what were available at the Digi-Key.
Thus most of passive components were replaced - my BOM file is uploaded too. I did not test transistors/power ICs, but visually they were good.
At the final phase when I must to test my S750 I found that I lost my marks about how to connect amp. boards to the IO-board (the board with inputs/outputs) and to the power board.

Maybe somebody here can give me information about that.
 partlist.doc ( 79.5k ) Number of downloads: 773


This post has been edited by kukruse: Jan 23 2014, 04:14 PM

lex, thanks for your reply.
I have checked 4x big MOSFET on power board and it seems that they are OK - at least there is resistance between all the pins.
All components what are in the list are already placed on the boards.
Right now I don't know how to connect boards to each other.
Could you give me some advice about that?

This post has been edited by kukruse: Feb 3 2014, 09:27 PM