CHANGI CJ-3000 DC TO AC POWER INVERTER

[Arvorsteve]

Hi
I am trying to source a circuit diagram for this Chinese inverter without much luck. I established that two of the IGBT's had failed as had a surface mount 10 ohm resistor and a 2 watt 1kohm resistor, all in the same output stage area of the board. Having changed all observable noticeably failed components the 1k 2 watt resistor started smoking and I now have a low resistance across one of the IGBT's suggesting that whatever has failed previously took out the IGBT again!
Any help or links to a possible circuit diagram source would be appreciated.
Thanks
Steve

 

[M.Joshi]

You can look for similar designs or datasheets for the main ICs which may have a recommended circuit.

Failing that, if you draw out a schematic of the inverter, someone on here might be able to advise what is causing the resistor to blow.