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Catastrophic Failure in Fanuc Power Supply

thread237-13647

Catastrophic Failure in Fanuc Power Supply

Catastrophic Failure in Fanuc Power Supply

(OP)
Electronics: Series O
Problem: Catastrophic Failure on transistor Modules of Power Supply
Solution (?): Replacement of Transistor, driving resistors, capacitor, alpha module, . Transistor (IGBT PHT) blown again.
How do we check regenerartive resistors?
Any ideas?
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