Arcam 8R Blowing Fuse

My Arcam 8R is blowing the main fuse.

I found that the right channel MOFFSETs had short.
I replaced them and now they get really hot within a few seconds and blowing the fuse again and also blowing the MOFFSETs too!

I checked the main diodes and they are ok.
What drives the MOFFSETs crazy, is there anything else you would suggest I check?

I attach the service manual.
 

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