one of the diodes was backwards d34. i hanged the orientation.
This amplifier still stays in protection, most of these models, even with the outputs removed, will come out of protection after a few seconds.
with everything in place, including the outputs what are you seeing? What does the drive look like? Do You have 10.3Vdc at Pin 2(CSD) of the IRS20957? Does Q19 get hot?
Without the outputs the CSD will be wrong. I discovered this working on another CXA.