Power supply works fine as far as voltage goes, but there is a hideous high pitch squeal coming from the power supply. I have recapped the power supply, reflowed new solder on connectors, etc. Checked capacitance on caps, checked ESR.
note: When I put in a known 100% Power supply the squeal goes away so it has to be something on the 90412 itself.
Ideas? This one doesn't appear to be obvious or easy fix to me.
note: When I put in a known 100% Power supply the squeal goes away so it has to be something on the 90412 itself.
Ideas? This one doesn't appear to be obvious or easy fix to me.
