Kaypro II Keyboard Schematic? Anyone have it?

[dplass]

"The entire bottom row above the space bar, space bar itself, Return and a handful of other keys to not work. "

I'm having the same exact problem with my Vector Graphic 4 keyboard. It uses mostly the same chipset (Intel 8051 instead of the 8048).

Do you know if the only solution is to replace one or more of the Exar chips?