FeedbackLoop | #75 - Shure PS41US power supply repair @feedback-loop | Uploaded 5 years ago | Updated 22 hours ago
The principles of operation of this switch-mode power supply were discussed based on the data sheet for the FSDM0265R controller chip. Measurements were done to show the fault condition. The fault was traced to a bad electrolytic capacitor on the primary side.

FSDM0265R data sheet: http://pdf.datasheetcatalog.com/datasheet2/d/0j8p7teh0c7cwtggzkjlf6sqqx7y.pdf