I have a 9050mfp, my problem with it is that, when printing A4 pages they jam on the inside of the paper stacker.
So initally from the service manual it said it is probably one of 2 things.
Replace the fuser or replace the duplex unit. i have replaced both and i still have the same problem.

I have noticed that the pages seemed to come out of the fuser a little crooked.
I then turned the pages A4R in the paper tray and they print fine, no jams at all.
Why is this?