wrote in message
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Forget all about rejuvinating. That CRT is not likely to respond like a TV
CRT.

I couldn't get a real print on it but most of these things have a DC
filament supply which is rectified off the flyback. Note that they are
turned and the fast sweep is vertical and the slow sweep is horizontal. Just
imagine the two deflection circuits swapped.

As such, off the flyback (VERTICAL OUTPUT) there should be a winding for the
filament supply. There may be a filter going dry.

If the supply is alright, there is the place you put a tertiary coil in
series with the winding to boost the voltage.

As far as what the voltages actually are, if the geometry is correct, the
voltages are probably correct.

Rejuvination is a last resort on something like this. Even if you can get a
CRT for it, the alignment is hairy and scary.


++++++++++++++++++++++++++++++++++++++++++++

It is a color raster scanned display. OP should read up on the color display
adjustments and go through the procedure. If that does not work, a new tube
would be the next thing. There might even be a LCD upgrade available for
less than a new tube.

We still do not know what the power supply is doing.

I bet a simple adjustment of the screens on the CRT would get some more
years out of it.