[OldTechFan96]

Thanks for the ongoing support WaveyDipole, it is much appreciated!

I've checked the mains transformer and it set for 237VAC.

I'll try some different BF256s. If I have no luck with them I'll look into another equivalent. I will try and feed some voltage into the input.

More CRT section investigation:

The -1000V rail was running a bit high at around -1050V. I brought it back into spec with R318.

Potentiometer fixed. I will source a new one in the future. Now I'm getting between -642V and -742V at pin 4 depending on where the focus pot is turned. Higher than it should be, but better than nothing.

I'm getting all of the voltages I should be in the CRT section and I'm still not getting a trace. I may have missed something, or is the CRT duff? It worked when I switched the scope on before it was stripped down. All I have done is reattach the base. Do the X and Y amps need to be working perfectly before a trace appears?

The square wave generator works. I checked it with my scope. A square wave can be found at pin one of the optocoupler.

The voltages on IC304, TR352 and TR353 look OK.

EDIT: I can't find C352 on the PCB layout. It is an electrolytic in the CRT section.