My newly aquired IRL FSK-1000 refused to turn on this am. Checking around i found the fuse located on the main board open. Why? I have no schematic nor parts list that even lists fuses. Anyone have a schematic that i could get a copy of? This is a like new unit and worked flawlessly yesterday/last evening. There was a 1/4 amp fuse in it but i don't know if thats correct or not. Help! Larry W0OGH