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15/11/2022 at 13:22 #1938
The Well Audio
So the regulator is working.
Please measure the voltage on pin 7 of K4 versus ground (the one connected to R40) with battery off.
You should measure 12-13VDC.
If so, please measure the voltage on J5, always with battery off.
You should measure the same 12-13VDC as above.