THE EAST PORTAL SUPPLY AND PERSONNEL HOISTS WEREDOWN OVER 30 MINUTES. IT WAS DETERMINED THAT THEPROBLEM ORIGINATED IN THE MANCAGE CONTROL BOX DUE TO A SHORT CIRCUIT. THIS CAUSED THE CONSTANT VOLTAGE TRANSFORMER TO SHOW LOW VOLTAGE WHICH CREATED A FALSE PIT SWITCH & FUNCTION LIGHT TO BE DISPLAYED ON THE SUPPLY HOIST. THE SUPPLY CAGE WAS AVAILABLE IN 1 HOUR & MANCAGE IN 4 HOURS.