Apple II+ Keyboard repair

[kynrek <kynrek@gmail.com>]

Someone gave me and apple ii+ but the keyboard did not work at all,
only the reset key worked. I replaced the keyboard encoder ic and a
few other components on the encoder board and now some of the keys do
make characters show on the screen :)

However the keys are not showing the right characters. for instance
the letters s and d both output the letter w, most of the number keys
output a ?. I think the individiual key switches might be bad but I'm
not sure. I can remove the key caps but I don't know how to get to the
switches underneath, I dont see any screws on the metal plate that
seperates the top of the keybaord with the  key caps and the underside
with the switches underneath.