I have an SDU-100 that isn't producing 5v.
History is when I received the board first power up with 12V caused R50 to go up in smoke.
I replaced R50, and the main capacitors on the board, but the 5v regulator was outputing close to 12V still.
I just replaced the 5v regulator with a new one, but am now reading 12v on the input side to the regulator, and basically 0 on the output side.
The original regular was a "SG323", and the new one is a "LM323K". See pics below.
As far as I can tell I connected the regulartor correctly, seems that the pins are lower on one side to avoid the possibility of incorrectly mounting it?
There was also a rubber (?) gasket between the old regulator base and the heat-sink that I kept between the new one and the heatsink, though the regulator schematics says the base of the case is the ground, so wouldn't that gasket keep it from grounding properly?
Any advice is appreciated!