Sony MDS-JE520 MiniDisc player/recorder to repair

Sony
This Sony MDS-JE520 MiniDisc player/recorder was a top seller in price/quality ratio. This example was working good but a stick minidisc cartridge did not slide open properly and was stuck inside. Now the ejection mechanism does not operate. Maybe just a belt or a sensor, if you are gifted in small mechanical operations, you may be able fix this easily and end with a nice machine for small money.