Discrete-IGBTs (50 A, 600 V) can be tested with an IGBT tester.
When changing damaged IGBTs, the whole series must be changed,
plus the gate resistors (10
Discrete-IGBT´s tightening torque to the heatsink is 0,6…1,2 Nm!
When testing secondary diodes the other coil end of the main
transformer (T001) must be disconnected. Main transformer
cable connector´s may break if bent!
If secondary diodes are in short circuit, then the power source
The soldering must be done carefully, because they are stressed with
high current, approximately 30 A/ leg!
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