11-05-2018, 10:48 AM
Also I noticed in this sch they did not place an X-cap across the AC plug. If all else fails and it seems to be an RF interference, try 0.01uF - 0.04uF X (or XY)-type cap across the AC input.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.