NEC C9-200

[llou]

Hi; I am newbie and have no experience with modifying TVs. I was given an old hospital color TV “NEC C9-200” (DC 12-24 v, 27 Watts). It has no power cord only cable jack.

What kind of connection that uses DC power injected into the coax? Is this a BNC connection? What do I need to get it working?

Images for this TV are available here: http://members.shaw.ca/lowis/nec/

Your help would be appreciated