i've also got an sabvoton 72150 which i accidentally got 72v shorted to signal gnd some time ago, managed to get it back working but had to change quite some parts. Swapped a few FETs, all 3 gate drivers, the rs485 transceiver (it didn't allow any communication either but mine only have rs485...
Just stumbled upon this controller; http://www.hec-drives.nl/TI-4520_open_top.png
Seems to use similar or same igbt's and gate drivers, might be to interest.