Sounds to me that while the POWER SUPPLY keeps working, it does not sufficiently attenuate EFT presented to it that your product keeps working. It is POSSIBLE you might find a power supply that does, but unless you can control whose PS customers use, it may be smarter in the long run to fix the EUT. Either, of course, would result in passing the test. But if customers used a different PS later, you might find field returns with no apparent reason adding warranty costs in your rework center.
The "quick fix" involves capacitors across the mains for differential, and mains to ground for common-mode, and might raise leakage. Less easy, but perhaps easier to live with, improve power filtering and device bypassing on the board so EFT does not completely discharge stored power. Cortland ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: [email protected] Dave Heald [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
