you would look at the shematic for that printer. What model and area was it romoved from.
redtank, I think copiertalk meant that as a question, in that s/he wants you to supply the information on what model the printer was, and from what area the encoder was removed from.
copiertalk has helped me in the past (IIRC) with a particular laser printer control panel that I picked up used and was unable to find the information for. In short order, I was informed of the pinout and proper communications protocol to use the LCD and buttons on the panel.
I can't guarantee that you'll get the same response, but if anyone had the information, copiertalk would be my first contact...