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I've had a closer look a the sets over the last few days and the Korting may have a big problem. There is a row of pins visible in the top left corner of the mainboard picture that looks like it held a plug in module. At this stage I have no info on this chassis so I don't know if it should be there or not. I'll have to investigate further.
After looking through my schematics collection, I've found that the Thorn came in three different power supply configurations. Aside from the transformer isolated models, there was also a hot chassis model with a diode and series resistor for the heater string supply.
At this stage the Healing is missing its horizontal output and audio amp valves (tubes). I believe I have used spares for these so I will be able to make some progress on its repair.
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