Thanks for your reply, one quick trick i used was to turn the connector 180 deg. (the common of the 5 pin is pin 3) and the fault stayed with the encoder. all the wiring was good so our dear friends at avolites sent me a new encoder. all now works correctly. thanks again

After many years my analogue encoders on my old Pearl finally gave up the ghost. Avolites came to my rescue and sent me the new optical encoders (at a cost). All worked fine for a couple of hours then the tilt encoder would only count up to 100% which ever way you rotate the pot. Any ideas?