Hmm, thats a thought...I never ever considered that these machines had onboard termination. I'm thinking...the terminator would be a resistor or a set of resistors...surely replacing some of these as a trial wouldn't be too expensive, even if they are the surface mount resistors. I'm looking at my 5260 board now, and on the bottom, there's a bunch of 220's together in one area at the following locatiosn, right near the edge connector: R250, R249, R254, R253, R258, R257

Then there's another couple a bit further away at R236, R237, R246, R245.

Oddly though i can't see any 230's anywhere.

I also had a look for fuses...i can't find any though...maybe they decided not to fit a fuse, as you said. Then again...it might be so small i simply just didn't take any notice.