FeedbackLoop | #100 - Roland V-Accordion FBC-7 power supply repair @feedback-loop | Uploaded 4 years ago | Updated 4 days ago
This is a power supply, battery charger and footswitch for Roland V-Accordion FR-7 (and FR-7x). It did not power up, and had some sings of a previous repair attempt. The problem was traced to a dual rectifier diode on the secondary side of the power supply. After replacing the faulty component with a suitable equivalent the power supply seems to work properly.

Dual schottky diode MBR20100CT: https://www.digikey.com/product-detail/en/smc-diode-solutions/MBR20100CT/1655-1036-ND/6022126