I think 46uf 16V are for sound, the 50V one is video related I think.
http://www.megadon.co.uk/wb/whiteboardshow.pl/syrinx/wbfile=Mac%20Classic%20Repair.wb/page=default.html
http://www.megadon.co.uk/wb/whiteboardshow.pl/syrinx/wbfile=Mac%20Classic%20Repair.wb/page=default.html