I do not have this camera but I do own an EEV ARGUS 1 that also uses a Pyroelectric Vidicon tube. I have the full service manual and schematics for the ARGUS so can tell you voltages to expect on the tube pins. The camera is very similar to a conventional Vidicon camera but it has a chopper wheel spinning in front of the tube to 'rest' the tube front face. These cameras would suffer chopper wheel and PSU related failures. Normally relatively easy to repair.
Be aware that as the camera is quite old now, the bias voltages on the tube will likely need adjusting for best image. I have those details for the ARGUS tube as well. Marconi/EEV made most of the Pyrovidicon tubes so your camera likely uses one either similar of the same as the EEV ARGUS.
Fraser