decided to start new topic for SW-110 repair. Thanks to ngen33r for the good explanations. Will post pictures in the begining, cose no success for the moment
Fuse was blown, capacitors fried. Previous attempt to fix from unknown - changed only IRF730's on the main inverter, after that capacitors fried.
Power inverter is classical half-bridge. Due to my error, it seemed strange topology, but now it is clear. My first idea was, to put snubbers to stop spikes, second idea is, to move changed elements on additional board, not to damage original. Moreover I expect fixes(add elements)