Finally got round to having a look at this one. I picked it up from Mikey66 last week.
It looks to be a reasonably upmarket version of the 100 chassis. Possibly modified with DIN video inputs? a Texas instruments Teletext board (Disconnected for some reason?) and a nice little nixie channel display. There also seems to be a board missing out of the bottom of the set. possibly to do with the text board. All the main boards appear to be present.
Initial checks revealed a few sick looking electrolytics on the PSU panel. These have been changed. I unhooked the tripler then cautiously applied mains. The set appears to try and start up. pops from the speaker and after a second shuts down. If the i unhook one of the plugs on the LOPT panel the set appears to start up. Nixie illuminates, some form of line whistle can be heard then after a few seconds a fusible resistor on the convergence panel springs open.
This leads me to think the line output transistor (bu208) may be faulty? Ive got a few on the way tomorrow. Ive got a service manual now (Thanks Chris
Any pointers would be appreciated