The DVD1 does not have a IR-eye in it. It is operated through the connected BeoVision and its terminal. The system is called Datalink and it works trough the SCART-cable…
The DVD1 is designed to be used through a BeoVision with a Beo4 terminal, but a BeoLink 1000 will do the job too, but not with the same ease.
I am pretty sure that you cannot use the V Terminal to operate the DVD1 even if you connect it to your BeoVision LX2800, which the V Terminal was designed to control.
Later BeoVisions came with a BeoLink 1000, and the menu was redesigned, so you have to set up the sockets in a very different way from the BeoVision LX2800.
Because of the redesign of the menu, I am almost 100% sure that you cannot use the V Terminal with the later BeoVisions, they need as a minimum the BeoLink 1000, to set up sockets and operate connected equipment.
/Erik