JVC Newvicon Camera Connections

[EdKozk2]

Hello,
I bought a JVC GX-N70U Newvicon camera, at Goodwill. It came with its viewfinder. I opened it up to trace the 12VDC power connections. The camera viewfinder has a raster. The title maker keboard also works.
The camera pickup tube does not televise in the viewfinder when I switch to camera mode. Does this camera have special connections to activate the newvicon tube ? The camera uses a 12 pins in the connector. The bottom two are for 12vdc. I would like to get the video signal out working if possible.
Any help would be great.

Thanks,
Ed