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TOTAL RECALL - very low voltages on all ICs

Started by Imuthant, September 13, 2018, 09:48:10 PM

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somnif

Quote from: Zoot on November 17, 2019, 10:08:59 PM
Found a bridge, which is going to be impossible to fix. It's on IC8 and am not eve sure it was causing the problem, as pins 4, 5, and 6 were shorted somehow. But after removing the socket and all the solder, they keep shorted. I was wondering if this could be a board defect. In any case I'll need another one if I want to continue with this project...the current is not usable anymore... have a look to its state...

That wasn't your problem, 4, 5, and 6 (as well as 14) are tied together to ground, as per the schematic.

More likely you had a short to ground somewhere on the power rail. Was anything making contact with the backs of the potentiometers?

Zoot

I see, still learning this thing... I controlled the power rail n times, couldn't find anything that was sucking all the power...

Zoot

Now, with all ICs loaded I'm getting the voltages in the picture.
Without any IC, I get in the REG I = -22.26V; O=-21.66V; G=0.00V
Why would I be getting a different output from the REG?
Thank you!