I have also seen these machines where the fuser tray does not latch back into the machine properly after clearing a jam. "kink" the latch to cause it to hold the tray in a little further. Bending the thermistors (very) slightly toward the hot roller also helps. These thermistors are also fairly fragile, so I have seen a new set fail pretty rapidly - especially if the pressure roller is starting to develop flat spots and causing vibration. (a big problem with low volume machines)
Last but not least, the B132 machines had a tech bulletin about the fusing harness deteriorating over time, and causing 54x, 55x, and 56x SC codes - Obviously it's a different design, and different harness, but I have had to replace them before...
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