Hello,
I just finished the soldering part of the sammichSID kit, thanks to wilba for allready a lot of help, I received a replacement control surface pcb (my original had some cluttered holes!?) and the soldering part went great!
I am at page 18 of the build guide, doing the first voltage tests.
My power supply is a 12Vdc regulated.
When I power my sammich base pcb, I measure nothing at none of the points in the guide's picture. I read through older topics, but couldn't solve it. My solder points all look good!
My initial thought was a problem with the power supply, so I started with measuring J1: 12.7
Then the middle legs of the power switch: also 12.7
Nothing at J20 or J2.
I tested the parts around the power supply and got the 12.7 across the JBP's top left and bottom right pin!?
I tried a shunt and when I apply a shunt to both I do get power out of the regulators, but it's -1.98 ?
(I have shunts in place for a 12V hi power display and but them in JM1 and JM0 and in JP in the horizontal position.)
I am no expert and am still climbing a learning curve, thank you for any help!