I'm repairing an old Tektronix OS-245(P)/U and while going through the scope I found a transistor array IC with the mark of death given by a previous repairman. The guy that had it last says it worked fine, but I'd like to investigate anyways. I have a few questions:
* How should I test the IC?
* If it is bad, how should I go about replacing it? Should I just choose transistors with the right voltage ratings(which I would have to guess), or is there more to it? Nothing could be found online; I only have the schematic for reference.