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Power semiconductor testing and replacing
A separate discrete-IGBTs can be tested only when disconnected
from the board with IGBT-tester.
When replacing damaged IGBTs, the whole set has to be
replaced, including gate resistors!!
Discrete-IGBT and secondary diodes tightening torque to the heat
sink is 0,6...1,2 Nm.
G
C
E
B1/4
20
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