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Very important and useful information was obtained from the chief engineer in the producing company of our X-Ray system last night, but for this indispensable factory internal know-how, it took me several days to come the destination for repairing this machinery. 8A fuse was checked last night ascertaining the connection, but 10A fuse opening is the criminal of the dysfunction this time probably caused by the power transistor shortening, one or more in 8 pieces, so the semiconductor replacement would be required. If the fuse was connected, it's very doubtful that the main part of radiation gun should be broken. In order to do that any specific measuring device is not necessary but only a simple circuit tester is enough, just see the connection open or shortened between three terminals on P-Tr.
24 years has passed since this machinery had been produced, so the same semiconductor would not exist in the market, but there should be any alternatives for the replacement, check the datum sheet carefully after coming across with the parts actually. Also he said in addition, 250V high voltage condition with thunder attack is dangerous enough to stop my heart's action and to take me to the Heaven, sure!