When you press
a key, you relase a lever at the right side of the
keyboard. This rotates (front end rises), turning the well-known H-plate
Why is this so well-known? Was it a frequently failing part? I've
noticed this in the past as well, people who had no idea what the
codebar reset bail was instantly recognized the H-plate.
No, it never fails AFAIK.
The reason it's well-knwon is that it's the part you have to remove in
order to remvoe the typing unit (main chassis with the printer mechanism,
motor and punch on it) from the base pan. And since that's something you
should do if shipping an ASR33 if you don't have the hold-down screw, the
H-plate is fairly well known.
-tony