Can the converters be cleaned with an ultrasonic cleaner?
Yes. They can be ultrasonically cleaned as long as the cleaning fluid used is not aggressive and does not attack any of the metal, plastic or epoxy parts. Note: We should take into consideration that some converters have empty holes (for optional features, such as control pins), so it’s possible that a small amount of cleaning fluid could wick its way through these holes and work its way under the base plate. This will not damage the converters (underneath the base plate it’s completely encased in epoxy) but be aware that if the board is baked to dry it off, the temperature of the oven should remain bellow 100°C so this trapped liquid doesn’t turn to steam and cause problems.
