Sony G84 Static Converter 147471111 is a television power supply board, also identified by part number 1-474-711-11. It is a replacement board for servicing a compatible TV, with the G84 designation identifying this particular converter part.
Sony's parts listing includes it for the XBR75X900F television. Match the part number to the existing board when identifying this replacement, since TV models can use different parts. The listing identifies this component as a power board; it does not specify electrical ratings or package contents.