Re: SG502 Schematic, Component Layout

Jeff Davis
 

I've uploaded photos of my mystery SG502 to Photos in the album SG502 Internals. Very odd that there are no part numbers marked on the board, nor serial numbers on the frame.

Barring a manual version appearing, looks like I'll need to do some trace bugging to see if I can reproduce at least the square wave output circuit schematic.

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