IBM 5110 power supply schematics?

It turned out my friend was wrong. The power transformer is most likely ok. But one of the main choppers were short circuited (yes, it is a switcher, again to little info from my friend). Anyway. The chopper transistors were TI made in 1978 but marked T484. Probably some IBM marking which no one has the cross for. I replaced them with nice high voltage high current TO3 transistors The only thing i could get from the original transistors except for the physical appearance was the polarity. With a 5.6 ohm resistor on the 5V i fired up the PSU with a 60W lamp in series with one of the mains leads. Nothing happened on the bases of the switchers until I got to around 190 VAC input. At that point the base went high and stayed there. Really strange. Of course I have no schematics for this IBM thingie. Does anyone have a schematic for the IBM 5110 PSU? I think I really need it to understand what is going on. Tracing it out is an option but then all those square metal canned IBM ICs... /Mattis